2. Standard equipment for one chamber 75 m 3:
Fans.
Aluminum thermal and moisture resistant reversible fans (engineSiemens) , in the amount of 4 pieces.
Fan power 4 kW. Degree of protection of fan motors IP 55 (GOST 14254-96), thermally protected version according to insulation class "H" (GOST 8865-93).
The fans are formed into a group on an aluminum fan wall and placed above the false ceiling. The fan blades are cast aluminum, dynamically balanced, the shells are made of aluminum alloys.
With optional installation electronic control systems fan speed control can be performed depending on the current moisture content of the wood: 10 steps, min. power - 20% of the nominal.
Heaters.
KNSk bimetallic heaters with aluminum fins. The heat transfer surface made of aluminum and the tight contact of the two materials provide high thermal performance of the heaters.
When drying hardwood lumber that forms a sharply aggressive environment (oak, larch), it is recommended to install stainless air heaters.
Automation and power cabinet.
under the control of aautomaticallyOhsystemsscontroller basedLiTOUCH.
LITouch is a natural evolution of the well proven DELPHI kiln controller. The automation combines ease of operation with a graphical touch display, and is particularly suitable for users who require simple and complete control over the system, using both standard and custom drying programmes.
Along with ease of maintenance, automation allows you to independently create complex drying cycles, including up to 30 stages. The operator can set priority conditions for the end of each drying phase, as well as select drive control modes. By default, the LITouch controller has more than 80 drying programs that can be used both independently and as a template for creating your own.
The sensor signal amplifier is housed in a separate aluminum housing (IP65). In this regard, the control panel with the controller can be located at a sufficient distance from the drying chamber (up to 1000 m).
Specifications:
Temperature measurement limits in the chamber: 0…130°C
Wood moisture measurement limits: 4…90%
Limits of measurement of equilibrium humidity: 2…30%
Number of temperature sensors: 2 (standard)
Number of wood moisture sensors: 6 (standard)
Number of EMC sensors: 2 (standard)
For remote control (range up to 1200 m) using a personal computer, software can be used WoodWizardversion2.0 (optionally supplied with matching unit), which combines all the best qualities of previous versions and new functionality.
It is also possible to combine up to 32 drying chamber controllers into a single network via a personal computer with remote access to the computer that controls the drying process.
Controller LiTOUCH easy to maintain, has the ability to obtain a detailed report of the drying process in printed form (including alarms). The protective function of the controller allows only authorized personnel to make changes to the program.
All actuators responsible for conducting the technological process are connected to the power cabinet. Switches on the front panel of the cabinet allow (if necessary) to switch to manual control of all equipment of the drying chamber during maintenance and repair work.
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Option: Controller based automatic control system dTOUCH.
dTOUCH developed on the basis of Delphi and has the same technical characteristics. In addition to all the features implemented in DELPHI, dTOUCH includes a wider range of drying programs for over 400 types of wood, including some special cycles to maintain/change the natural color of the wood, to dry quickly and so on. Distinctive feature dTOUCH- management through touch screen with the ability to connect wireless sensors to control the wood drying process. Loading and transferring control programs using microSD memory.
Frame and wall construction.
The frame of the building is a metal structure made entirely of aluminum profile.. An observation door is installed in the rear wall of the chamber.
Cassette wall construction, internal and external cladding - profiled aluminum alloy sheet .
Minplate used as insulation PAROC, based on basalt fiber with mixed fiber orientation. The thickness of the panel is 125 mm (at the request of the customer, the thickness of the panels can be changed).
The insulation is laid in 2 layers, which allows you to minimize the area of thermal bridges.
Wall construction consisting of horizontal cassettes with slab heights of 850 mm guarantees no sagging of the insulation during the entire period of operation.
The structure of the fiber does not contain any volatile compounds, so its thermal insulation properties remain unchanged for decades. Basalt fiber has good water-repellent properties; under normal operating conditions, the amount of moisture in the specific volume is less than 0.5%.
Thermal resistance coefficient of fences 5.45 m 2 x o C / W subject to operation B according to SNiP 23-02-2003.
The coefficient of thermal conductivity of mineral wool is not more than 0.033 W / (m x ºС).
A drainage chute is provided in the floor of the chamber.
Defrost protection- in automatic mode, the chamber maintains a temperature of at least 5ºС; during a long stop, it is possible to drain water from the heating system and from each heater.
Lift-and-slide gates and gate lifting mechanism.
The gates are made of the same materials as the walls of the drying chamber. Opening and closing of gate is made by the special mechanism. The movement of the mechanism with the gate is carried out along the overhead track. The tight fit of the gate is carried out due to its own weight of the gate, which is lowered by the mechanism onto special guides.
The silicone rubber profile provides high-quality isolation of the chamber space from the external environment (silicone rubber is an excellent insulating material in terms of its operational qualities, withstands frost without hardening up to t = -50 ºС; silicone has excellent reversible properties, withstands high humidity, pressure, steam, action various chemicals and oils; resistant to solar radiation, ozone and has electrical insulating properties). Maximum operating temperature t = + 150 ºС.
Supply and exhaust ventilation system.
The supply and exhaust ventilation system includes insulated boxes, aluminum valves (flaps), in the amount of 4 pieces and 2 drives (Switzerland).
Apron set.
Purpose - rational distribution of the drying agent flow.
Three-way valve of the heating system.
Three-way valve for heater (Siemens) made of cast iron, valve stem made of stainless steel. The valve is equipped with an electric actuator (Siemens) with electronic control. The most admissible working temperature t = 130ºС. Nominal diameter of the three-way valve DN 80.
False ceiling, deflectors, fan wall.
False ceiling, deflectors and fan wall are made of corrosion-resistant grades of aluminum. The main purpose of the metal structures of the internal equipment is to create a channel for the movement of the drying agent and to attach fans and heaters.
To facilitate access to the equipment during routine maintenance and inspections, the false ceiling panels are made easily removable.
Hardware.
All fastenings in the chamber (bolts, nuts, self-tapping screws, etc.) are made stainless steel, rivets - aluminum.
Humidification system.
The humidification system includes copper pipes, fittings, nozzles, electromagnetic valve DN12. An autonomous water supply system and a fine water filter are optionally supplied.
Cable set.
The set of cables ensures the location of the control cabinet in the room at a distance of up to 5 meters from the drying chamber.
Drying chamber device
Drying chamber SKvp consists of an all-metal frame, insulated with mineral wool basalt sandwich panels 100-120 mm thick, which guarantee normal operation in the ambient temperature range from -30 to +40 ºС. The frame of the drying chamber is treated with a thermal and moisture-resistant Finnish coating. The gates of the drying chamber are lifting and retractable on rhombic supports, they are pressed spontaneously under their own weight. The gates are opened with the help of a removal mechanism, on which a worm winch is installed and rolled to the side to the width of the opening along an I-beam located in the upper part of the frame under the roofing sandwich panels. On the back wall of the drying chamber there is an inspection door for visual control of the condition of the lumber during the drying process in case of need and maintenance or emergency repairs.
Overhead Equipment Diagram, Front Loading Forklift (Side View)
SKvp 30....80
The wood drying chamber is equipped with aluminum axial reversible fans that blow the stack with air at a speed of 2…2.5 m/s and stainless steel heat exchangers designed to heat the air. The equipment is located in the upper part of the body and is closed from below by a false ceiling with gaps to the inner surfaces of the rear wall and the door of 1000…1200 mm, which ensures good stack ventilation. On the rear and front walls above the door, 2 aluminum air dampers with electric drives are installed to automatically eject excess moisture from the drying chamber. On the supply pipeline, a 3-way valve with an electric drive is installed to automatically regulate the supply of hot water to the heat exchangers. Air and 3-way valves provide the necessary climate in the drying chamber, namely, the temperature and humidity of the air set by the operator using the program at each stage of lumber drying.
Temperature, air humidity and wood moisture during the drying process are measured using sensors installed on the back and side walls inside the drying chamber. The entire drying process is controlled by an automatic control system based on advanced Italian controllers of the new generation LITouch or dTOUCH.
Technical characteristics of drying chambers of the SKvp series
| Parameters | SKvp-30 | SKvp-40 | SKvp-50 | SKvp-65 | SKvp-80 |
| External dimensions of the drying chamber frame, mm: - length - width - height |
4900 7000 4950 |
5900 7000 4950 |
7100 7000 4950 |
8300 7000 4950 |
9500 7000 4950 |
| Doorway dimensions, mm | 6600 x 3600 | ||||
| Useful loading volume of lumber 6000 mm long (board 150 mm wide, gasket 25 mm thick), m³ - board thickness 50 mm - board thickness 40 mm - board thickness 30 mm |
32 |
43 |
57 |
71 |
85 |
| Number of stacked packages | 6 | 9 | 12 | 15 | 18 |
| Dimensions of one package (width x height), according to which the useful loading volume is calculated, mm | 1200 x 1100 | 1100 x 1100 | |||
| Number of reversible fans and motor power | 3 pcs. 3 kW | 3 pcs. 4 kW | 5 pieces. 3 kW |
5 pieces. 4 kW |
|
| Air flow generated in the drying chamber, m³/h | 90 000 | 105 000 | 150 000 | 175 000 | |
| The number of heaters and the thermal power of each when supplying water 90 ºС | 3 pcs. 65 kW | 6 pcs. 65 kW | 9 pcs. 65 kW |
||
| Heat exchange surface area of heaters, m² | 127 | 254 | 381 | ||
| The number and dimensions of the passage section of air valves | 4 things. 300 x 300 mm | 4 things. 400 x 300 mm | 4 things. 500 x 300 mm | ||
| Nominal passage of the 3-way valve, mm | DN 40 | DN 50 | DN 65 | ||
| Thickness of mineral wool insulation based on basalt, mm - walls - roofs |
100 120 |
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| Drying control |
SAU-30 automation based on LITouch controller |
SAU-40 automation based on dTOUCH controller |
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| Average drying time under normal modes of drying conifers, days - board thickness 50 mm - board thickness 40 mm - board thickness 30 mm |
8 |
||||
| Required thermal power when choosing a boiler, kW | 160 | 215 | 285 | 355 | 425 |
| Ambient air temperature during operation of the drying chamber, ºС | - 30 … + 40 | ||||
This type kilns for wood loaded by transverse movement of stacks p / m using a forklift, i.e. frontally. Placement of equipment in the drying chamber - on the back wall, or in the classical way above the false ceiling. Axial reversible fans made of corrosion-resistant aluminum alloys serve as stimulators for the circulation of the drying agent. Rise-rollback of gate is mechanized.
The advantage of ourdrying chambers :
- Lower cost compared to imported and domestic counterparts!
- You do not have to rack your brains at all - where to fasten which screw, we will do it for you!
- Ease of maintenance and open user architecture of the ACS leave you the right to flexibly adjust the operation of the cameras!
Domestic drying chambers of the European level
In modern conditions, woodworking products are becoming more and more in demand. At the same time, one of the ways to increase the profitability of a woodworking enterprise is a deeper processing of the material.
At the stage of primary processing, the use of drying chambers contributes to the increase in economic efficiency. Despite the abundance of various designs, the most effective are still traditional - convective-type drying chambers. The company "Negotiant-nizhiniring" has rich experience in the supply of convective-type drying kilns. The quality of the supplied cameras corresponds to the best European standards, while their prices are much lower than their imported analogues.
The heat carrier in chambers of this type is ordinary hot water or steam, and energy complexes operating on wood waste (sawdust, shavings, etc.) can be used to heat water. The drying process practically does not require additional costs, while solving the problem of waste disposal. Drying of wood is carried out by hot air with high-speed circulation of the drying agent. Air movement is directed perpendicular to the stack. Our company supplies cameras of various sizes. They allow you to dry wood of any species, and are suitable for both large enterprises and small workshops.
The supporting structure of the chamber is formed by a massive frame made of special grades of aluminum. Enclosing structures are a cassette structure, which significantly increases the speed of assembly and the reliability of the structure. The elements of the cassette structure are made of three-layer panels filled with hard mineral wool insulation. The thickness of the panels reaches 120 - 150 mm.
The front loading kilns are equipped with lift-and-slide doors. Opening and closing of gate is made by the special mechanism on a suspended way. Trolley loading cells are usually equipped with single or double swing gates. Tight clamping of the gate is provided by a screw mechanism, and a special silicone rubber profile is used as a seal.
The main purpose of the metal structures of the internal equipment is to create a channel for the movement of the drying agent. At the same time, they also serve for mounting internal equipment - fans and heaters. All components are made of aluminium. To ensure easy access to the equipment during routine maintenance and inspections, the false ceiling panels are easily removable.
A significant advantage of the cameras is the use of imported components (electronics, fans, etc.). They have long proved their reliability in comparison with Russian counterparts. This factor slightly affects the overall cost, but significantly increases the reliability of the camera. A control unit from HOLZMEISTER is used to realize the automatic control of the drying process. On its rear panel there is a port for connecting a printer without using a computer. Camera control units can be combined into a single network, which will allow the operator to control a block of drying chambers (up to 32 pieces) from one personal computer.
The entire electric power part of the control system is mounted in the control cabinet. The switches are located on the front panel of the cabinet. They allow, if necessary, to switch to manual control of all equipment of the drying chamber. This feature is especially useful for maintenance and repair work.
Drying chambers are equipped with KNSk type heaters with bimetallic (carbon steel - aluminum) spiral-rolled pipes. If necessary, the design of the heater is made of stainless steel. The service life of heaters with a bearing structure made of carbon steel is 8-10 years, of stainless steel - up to 30 years.
All internal elements of the chambers have been repeatedly tested. Air circulation is provided by highly efficient reversible fans made in Germany, installed in the upper part of the chamber. The fans are made in a moisture-thermoprotective design according to class "H" (GOST 8865-93), degree of protection IP55 (GOST 14254-96). The estimated speed of the drying agent is 2.0 - 2.5 m/s. This characteristic ensures fast and high-quality drying and corresponds to the state of the art in drying technology. If necessary, fans can be equipped with an electronic speed variator that allows you to change the drying speed, and at the same time save up to 30% of energy when drying long-drying species and wood assortments. Balanced characteristics and rational layout of fans and heaters provide uniform blowing of lumber and efficient operation of the equipment.
The ventilation system is designed to discharge excess moisture into the atmosphere and supply air with low moisture content to the chamber. The system consists of insulated boxes, aluminum valves and electric actuators made in Switzerland.
The humidification system increases the humidity in the chamber. Humidification is done with hot or cold water. The system is equipped with stainless steel slot nozzles that are easy to clean.
The measurement of temperature and air humidity is carried out at two points, and the measurement of wood moisture - at six. If necessary, the number of measuring points can be changed.
In addition to the standard interior equipment, the following optional equipment is installed:
- electronic fan speed variator;
- valve for steam or water for temperatures up to 150 0C;
- fasteners made of stainless steel;
- piping of the heating system (heaters): pipes and fittings;
- pumping station for the humidification system;
- double-sided humidification system for use in large chambers when drying hardwoods;
- control room: a fully equipped room attached to the chamber with a kit for piping systems and fixing units (including piping for heaters and humidification systems);
- pallet trucks, rails.
We produce six standard sizes of convective drying kilns with front loading lumber - for 30 m³, 40 m³, 50 m³, 60 m³, 80 m³ and 100 m³ single load
The chambers are built according to the classical scheme with vertical-transverse circulation of the drying agent over the stack. The height of the drying chamber is divided into two parts by a false ceiling. The stack is formed at the bottom of the chamber, and all the main equipment is located above the level of the false ceiling. To mount the equipment under the ceiling of the drying chamber, a metal structure is assembled, the main elements of which are trusses interconnected by braces and braces. Axial reversible fans and heat exchangers are attached to the trusses, as well as a false ceiling. The false ceiling serves to organize the movement of air flows inside the chamber. To carry out air exchange with the external environment, supply and exhaust ventilation pipes are built into the roof or walls above the level of the false ceiling. Branch pipes are equipped with air valves.
The basis of the design of the front-loading drying chamber is a frame mounted on a pre-prepared base. The frame is made of aluminum profiles. Elements of the inner and outer skin are attached to the frame. Between the skins, a mineral wool insulation is laid. Heater - slab. To prevent possible subsidence of the insulation, a crate is equipped on the vertical wall fences. The vapor barrier layer prevents condensation on the outer skin of the chamber and the absorption of this moisture by the insulation, while maintaining its high heat-insulating properties.
In front-loading drying chambers, the loading gates have a significant length, i.e. the length exceeds the length of the stack, therefore, they are most often made lifting gates. The gates are equipped with roller clamps, a profile silicone sealant for sealing the points of contact with the doorway of the chamber, and hooks for opening the gate. To open, use a special gate release mechanism. On the doorway of the drying chamber, special grippers are fixed, which include roller gate clamps. The gate, settling under its own weight, is tightly and securely fixed by grippers to the doorway. Roll-up gate mechanism hung on a monorail fixed above the doorway. The design of the gate release mechanism allows lifting and moving gates weighing up to 1200 kg.
The fans used in these drying chambers are reversible, axial, with cast aluminum impeller. As fan drives, imported electric motors are used in tropical design, insulation class "H", i.e. they can be used in rooms with an ambient temperature of up to 100ºС.
As heat exchange equipment in convective drying chambers are used water heat exchangers, the heat-releasing elements of which are made of a bimetallic finned tube. Aluminum finning, rolled, which ensures good contact between it and the carrier pipe, which in turn increases the heat transfer coefficient between the coolant and the environment. The connection of heat exchangers with the supply and return manifolds is flanged. The supply manifold is equipped with an air removal system, and the return manifold is equipped with a coolant drain system.
To control the drying process of lumber drying chambers are equipped with automation systems. In the basic configuration drying chambers are completed with automatics of own production PSU-TPS(d) on the basis of the domestic controller. At the request of the CUSTOMER, it is possible to complete the cameras with automation based on the controller DELPHI.
