A rubber drying line

Abstract

A rubber drying line includes a chain net conveying system, a heat pump system and a water cooling system. The chain net conveying system includes several drying areas according to the conveying direction, and each drying area is correspondingly provided with a heat pump system; the heat pump system includes a compressor, a first condenser, a second condenser, a first electronic expansion valve, a heat recovery device and an evaporator; the first condenser and the second condenser are arranged in parallel, and the first condenser and the second condenser are arranged staggered up and down. The first condenser and the second condenser are arranged in parallel, and the refrigerant output by the compressor is supplied to the two condensers at the same time to form two heating sources. After the air is heated to the specified temperature of hot air through the first condenser, the first heat exchange is performed on the material. After the temperature of the hot air drops after the heat exchange, it is heated to the specified temperature through the second condenser, and the second heat exchange is performed on the material again, so as to ensure that the material can be continuously and rapidly dried at high temperature, especially for rubber products, to achieve the purpose of rapid drying and maturation of raw rubber.

Description

Technical Field

[0001] The invention relates to the technical field of heat pumps, in particular to a rubber drying line. Background Art

[0002] Rubber products need to be quickly dried and matured during production. Currently, rubber products are dried in open kiln tunnel furnaces. The heating temperature of kiln tunnel furnaces can reach 100~120℃, which can meet the drying temperature requirements of rubber products. However, since rubber products release harmful gases during the heating process, the open heating method obviously has safety hazards. Therefore, it is necessary to seek a more environmentally friendly rubber product drying system. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a rubber drying line which can dry rubber products and is more environmentally friendly and more efficient.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a rubber drying line, including a chain net conveying system, a heat pump system and a water cooling system, wherein the chain net conveying system includes a plurality of drying areas according to the conveying direction, and each drying area is provided with a corresponding heat pump system;

[0005] The water cooling system comprises a water cooler, a cooling tower, a water pump and an electric proportional regulating valve, wherein the output end of the cooling tower is connected to the input end of the water cooler through the water pump and the electric proportional regulating valve, and the output end of the water cooler is connected to the input end of the cooling tower;

[0006] The heat pump system includes a compressor, a first condenser, a first condensing fan matched with the first condenser, a second condenser, a second condensing fan matched with the second condenser, a first electronic expansion valve, a heat recovery device and an evaporator; the first condenser and the second condenser are arranged in parallel, and the first condenser and the second condenser are arranged staggered up and down; the output end and the input end of the compressor are connected to a main pipeline, and the main pipeline passes through the first condenser and the second condenser connected in parallel, the liquid storage tank, the first heat exchange tube of the economizer, the first electronic expansion valve, the evaporator and the gas-liquid separator in sequence; the output end of the first heat exchange tube of the economizer and the air supply port of the compressor are connected to an auxiliary pipeline, and the auxiliary pipeline passes through the second electronic expansion valve and the second heat exchange tube of the economizer in sequence; the heat recovery device includes a heat recovery channel and a heat output channel;

[0007] The chain network conveying system includes a conveyor belt and a variable frequency motor driving the conveyor belt;

[0008] The first condenser and the first condensing fan are arranged above the conveyor belt, and the second condenser and the second condensing fan are arranged below the conveyor belt. The hot air output from the first condenser through the first condensing fan passes through the conveyor belt, the second condenser, the second condensing fan, the conveyor belt, the heat recovery channel of the heat recovery device, the water cooler, the evaporator and the heat output channel of the heat recovery device in sequence and then returns to the input end of the first condenser; the heat recovery device is adjacent to the first condenser on the left and right, and the water cooler is adjacent to the evaporator on the left and right.

[0009] The principle of the present invention is as follows: a first condenser and a second condenser are arranged in parallel, and the refrigerant output by the compressor is supplied to the two condensers at the same time to form two heating sources. After the air is heated to the hot air of the specified temperature through the first condenser, the first heat exchange is performed on the material. After the hot air temperature drops after the heat exchange, the second heat exchange is performed on the material again after being heated to the specified temperature through the second condenser, thereby ensuring that the material can be continuously and rapidly dried at high temperature, especially for rubber products to achieve the purpose of rapid drying and maturation of raw rubber; the circulating air path of the heat pump system is closed, and the harmful gases generated by the rubber products will not diffuse outward, which is more environmentally friendly; the chain network conveying system cooperates with the heat pump system to realize continuous drying of rubber products, and the production efficiency is higher.

[0010] As an improvement, the conveyor belt is installed on the conveyor frame, and the first condenser fan, the second condenser and the second condensation fan are installed on the conveyor frame; the compressor, the first condenser, the first electronic expansion valve, the heat recovery device and the evaporator are arranged in an insulation box, and the insulation box is arranged on the top of the conveyor frame and above the conveyor belt.

[0011] As an improvement, each drying area includes a first heating zone and a second heating zone, a partition is provided between the first heating zone and the second heating zone, the first condensing fan is aimed at the first heating zone, and the second condensing fan is aimed at the second heating zone.

[0012] As an improvement, a high-pressure switch and an exhaust temperature sensor are provided on the main line at the output end of the compressor, a condensation pressure sensor is provided on the main line between the combined output end of the first condenser and the second condenser and the input end of the liquid storage tank, a liquid pipe inlet temperature sensor is provided on the main line between the output end of the liquid storage tank and the output end of the first heat exchange tube, a liquid pipe outlet temperature sensor, a net bag filter and a drying filter are provided on the main line between the output end of the first heat exchange tube and the input end of the evaporator, a main line suction pressure sensor, a main line suction temperature sensor and a first needle valve are provided on the main line between the output end of the evaporator and the input end of the gas-liquid separator, a second needle valve is provided on the main line between the output end of the gas-liquid separator and the input end of the compressor, and an auxiliary line suction pressure sensor and an auxiliary line suction temperature sensor are provided on the auxiliary line between the output end of the second heat exchange tube and the air supply port of the compressor.

[0013] As an improvement, the compressor is a ZW650 scroll compressor, the first electronic expansion valve is an Emerson electronic expansion valve EX6, and the second electronic expansion valve is an Emerson electronic expansion valve EX5.

[0014] As an improvement, the compressor is arranged in an independent cavity.

[0015] As an improvement, it also includes a flexible evaporation circulation fan corresponding to the evaporator and a humidity sensor for detecting the humidity of the air entering the evaporator. The speed of the flexible evaporation circulation fan is adjusted according to the humidity of the air.

[0016] As an improvement, the conveyor belt includes a chain net and a PP polyester net sleeved on the chain net, and side-by-side double chains are respectively arranged on both sides of the chain net. The variable frequency motor drives the sprocket, and the sprocket drives the side-by-side double chains.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] A first condenser and a second condenser are set in parallel, and the refrigerant output by the compressor is supplied to the two condensers at the same time to form two heating sources. The air is heated to the specified temperature of hot air through the first condenser, and then the first heat exchange is performed on the material. The temperature of the hot air drops after the heat exchange, and after being heated to the specified temperature through the second condenser, the material is subjected to a second heat exchange, thereby ensuring that the material can be continuously and rapidly dried at high temperature, especially for rubber products to achieve the purpose of rapid drying and maturation of raw rubber; the circulating air path of the heat pump system is closed, and the harmful gases generated by rubber products will not diffuse outward, which is more environmentally friendly; the chain network conveying system cooperates with the heat pump system to realize continuous drying of rubber products, and the production efficiency is higher; the flexible evaporative circulation fan adaptively changes frequency according to the return air humidity. When the humidity is high, the fan frequency is high, and when the humidity is low, the fan frequency is low, thereby improving the adaptability of the evaporator, achieving better dehumidification effect and more energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the wind path diagram of the present invention.

[0020] Figure 2 This is a piping diagram of the heat pump system of the present invention. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] like Figure 1 As shown, it includes a chain network conveying system, a heat pump system and a water cooling system. The chain network conveying system includes several drying areas according to the conveying direction. Each drying area is equipped with a heat pump system. The heating temperatures of different drying areas are different. According to the characteristics of rubber products, the temperature decreases along the conveying direction.

[0023] like Figure 1 As shown, the water cooling system includes a water cooler 2, a cooling tower 7, a water pump 8 and an electric proportional regulating valve 9. The output end of the cooling tower 7 is connected to the input end of the water cooler 2 through the water pump and the electric proportional regulating valve 9, and the output end of the water cooler 2 is connected to the input end of the cooling tower 7. The water flow rate can be adjusted by the electric proportional regulating valve 9, thereby controlling the temperature of the water cooler 2, and the temperature is adjusted according to the heat of the circulating air.

[0024] like Figure 1 As shown, the heat pump system includes a compressor 15, a first condenser 5, a first condensing fan 6 coordinated with the first condenser 5, a second condensing fan coordinated with the second condenser 12, a first electronic expansion valve 26, a heat recovery device and an evaporator 3. The first condenser 5 and the second condenser 12 are arranged in parallel, and the output end of the compressor 15 is connected to the two condensers at the same time. The heat recovery device includes a heat recovery channel 1 and a heat output channel 4. The heat recovery device includes stacked metal sheets, and channels are formed between adjacent metal sheets. The heat recovery channel 1 and the heat output channel 4 are spaced apart from each other and arranged vertically. As shown Figure 2 As shown, the main pipeline is connected between the output end and the input end of the compressor 15, and the main pipeline passes through the first condenser 5 and the second condenser 12 connected in parallel, the liquid storage tank 27, the first heat exchange tube of the economizer 32, the first electronic expansion valve 26, the evaporator 3 and the gas-liquid separator 21 in sequence. The auxiliary pipeline is connected between the output end of the first heat exchange tube of the economizer 32 and the air supply port of the compressor 15, and the auxiliary pipeline passes through the second electronic expansion valve 25 and the second heat exchange tube of the economizer 32 in sequence. The compressor 15 is a ZW650 scroll compressor, and the compressor 15 is arranged in an independent cavity. The first electronic expansion valve 26 is an Emerson electronic expansion valve EX6, and the second electronic expansion valve 25 is an Emerson electronic expansion valve EX5. A high-pressure switch 16 and an exhaust temperature sensor 17 are provided on the main pipe at the output end of the compressor 15, a condensing pressure sensor 28 is provided on the main pipe between the combined output end of the first condenser 5 and the second condenser 12 and the input end of the liquid storage tank 27, a liquid pipe inlet temperature sensor 33 is provided on the main pipe between the output end of the liquid storage tank 27 and the output end of the first heat exchange tube, a liquid pipe outlet temperature sensor 31, a net bag filter 30 and a drying filter 29 are provided on the main pipe between the output end of the first heat exchange tube and the input end of the evaporator 3, a main line suction pressure sensor 24, a main line suction temperature sensor 23 and a first needle valve 22 are provided on the main pipe between the output end of the evaporator 3 and the input end of the gas-liquid separator 21, a second needle valve 18 is provided on the main pipe between the output end of the gas-liquid separator 21 and the input end of the compressor 15, and an auxiliary line suction pressure sensor 20 and an auxiliary line suction temperature sensor 19 are provided on the auxiliary pipe between the output end of the second heat exchange tube and the air supply port of the compressor 15.

[0025] The evaporator 3 is provided with a corresponding flexible evaporation circulation fan and a humidity sensor for detecting the humidity of the air entering the evaporator 3. The flexible evaporation circulation fan adaptively changes frequency according to the humidity of the return air. When the humidity is high, the fan frequency is high, and when the humidity is low, the fan frequency is low, which improves the adaptability of the evaporator 3, has a better dehumidification effect and is more energy-saving.

[0026] The chain net conveying system 14 includes a conveyor belt and a variable frequency motor driving the conveyor belt. The conveyor belt includes a chain net and a PP polyester net sleeved on the chain net. The chain net provides sufficient support force, and the PP polyester net plays the role of anti-sticking and wind dispersion, so that the hot air becomes more uniform when passing through the conveyor belt, and the rubber products are evenly heated. The two sides of the chain net are respectively provided with side-by-side double chains, and the variable frequency motor drives the sprocket, and the sprocket drives the side-by-side double chains. The variable frequency motor drives the conveyor belt through the chain and the sprocket, and the conveying speed of the conveyor belt can be adjusted by adjusting the frequency of the variable frequency motor. The chain is provided with a baffle, which can prevent the rubber products from falling off the conveyor belt and prevent the hot air from quickly losing from the drying area.

[0027] like Figure 1 As shown, the first condenser 5 and the first condensation fan 6 are arranged above the conveyor belt, the second condenser 12 and the second condensation fan 13 are arranged below the conveyor belt, the first condenser 5 and the second condenser 12 are arranged staggered up and down, and the hot air output by the first condenser 5 through the first condensation fan 6 passes through the conveyor belt, the second condenser 12, the second condensation fan 13, the conveyor belt, the heat recovery channel 1 of the heat recovery device, the water cooler 2, the evaporator 3 and the heat output channel of the heat recovery device in sequence and then returns to the input end of the first condenser 5; the heat recovery device is adjacent to the first condenser 5 on the left and right, and the water cooler 2 is adjacent to the evaporator 3 on the left and right. The conveyor belt is installed on the conveyor frame, and the first condenser 5 fan, the second condenser 12 and the second condensation fan 13 are installed on the conveyor frame; the compressor 15, the first condenser 5, the first electronic expansion valve 26, the heat recovery device and the evaporator 3 are arranged in the heat preservation box, and the heat preservation box is arranged on the top of the conveyor frame and located above the conveyor belt. Each drying area on the conveyor belt is provided with a first heating zone and a second heating zone, a partition is provided between the first heating zone and the second heating zone, the first condensing fan 6 is aimed at the first heating zone, and the second condensing fan is aimed at the second heating zone; the partition of the heating zone can prevent hot air leakage on the one hand, and prevent temperature crossover between the two heating zones on the other hand.

[0028] Principle of the present invention: a first condenser 5 and a second condenser 12 are arranged in parallel, and the refrigerant output by the compressor 15 is supplied to the two condensers at the same time to form two heating sources. After the air passes through the first condenser 5 and is heated to the hot air at a specified temperature, the first heat exchange is performed on the material. After the hot air temperature drops after the heat exchange, it is heated to the specified temperature by the second condenser 12, and the second heat exchange is performed on the material again, thereby ensuring that the material can be continuously and rapidly dried at a high temperature, especially for rubber products to achieve the purpose of rapid drying and maturation of raw rubber; the circulating air path of the heat pump system is closed, and the harmful gases generated by the rubber products will not diffuse outward, which is more environmentally friendly; the chain network conveying system cooperates with the heat pump system to realize continuous drying of rubber products, and the production efficiency is higher.

Claims

1. A rubber drying line, characterized by: It includes a chain net conveying system, a heat pump system and a water cooling system. The chain net conveying system includes several drying areas according to the conveying direction, and each drying area is provided with a corresponding heat pump system. The water cooling system comprises a water cooler, a cooling tower, a water pump and an electric proportional regulating valve, wherein the output end of the cooling tower is connected to the input end of the water cooler through the water pump and the electric proportional regulating valve, and the output end of the water cooler is connected to the input end of the cooling tower; The heat pump system includes a compressor, a first condenser, a first condensing fan matched with the first condenser, a second condenser, a second condensing fan matched with the second condenser, a first electronic expansion valve, a heat recovery device and an evaporator; the first condenser and the second condenser are arranged in parallel, and the first condenser and the second condenser are arranged staggered up and down; the output end and the input end of the compressor are connected to a main pipeline, and the main pipeline passes through the first condenser and the second condenser connected in parallel, the liquid storage tank, the first heat exchange tube of the economizer, the first electronic expansion valve, the evaporator and the gas-liquid separator in sequence; the output end of the first heat exchange tube of the economizer and the air supply port of the compressor are connected to an auxiliary pipeline, and the auxiliary pipeline passes through the second electronic expansion valve and the second heat exchange tube of the economizer in sequence; the heat recovery device includes a heat recovery channel and a heat output channel; The chain network conveying system includes a conveyor belt and a variable frequency motor driving the conveyor belt; The first condenser and the first condensing fan are arranged above the conveyor belt, the second condenser and the second condensing fan are arranged below the conveyor belt, and the hot air outputted from the first condenser by the first condensing fan sequentially passes through the conveyor belt, the second condenser, the second condensing fan, the conveyor belt, the heat recovery channel of the heat recovery device, the water cooler, the evaporator and the heat output channel of the heat recovery device, and then returns to the input end of the first condenser; the heat recovery device is adjacent to the first condenser on the left and right, and the water cooler is adjacent to the evaporator on the left and right; The conveyor belt is installed on the conveyor frame, and the first condensing fan, the second condenser and the second condensing fan are installed on the conveyor frame; the compressor, the first condenser, the first electronic expansion valve, the heat recovery device and the evaporator are arranged in an insulation box, and the insulation box is arranged on the top of the conveyor frame and above the conveyor belt; Each drying area includes a first heating zone and a second heating zone, a partition is provided between the first heating zone and the second heating zone, the first condensing fan is aimed at the first heating zone, and the second condensing fan is aimed at the second heating zone.

2. The rubber drying line according to claim 1, characterized in that: A high-pressure switch and an exhaust temperature sensor are provided on the main pipe at the output end of the compressor, a condensation pressure sensor is provided on the main pipe between the combined output end of the first condenser and the second condenser and the input end of the liquid storage tank, a liquid pipe inlet temperature sensor is provided on the main pipe between the output end of the liquid storage tank and the output end of the first heat exchange tube, a liquid pipe outlet temperature sensor, a net bag filter and a drying filter are provided on the main pipe between the output end of the first heat exchange tube and the input end of the evaporator, a main line suction pressure sensor, a main line suction temperature sensor and a first needle valve are provided on the main pipe between the output end of the evaporator and the input end of the gas-liquid separator, a second needle valve is provided on the main pipe between the output end of the gas-liquid separator and the input end of the compressor, and an auxiliary line suction pressure sensor and an auxiliary line suction temperature sensor are provided on the auxiliary line between the output end of the second heat exchange tube and the air supply port of the compressor.

3. The rubber drying line according to claim 1, characterized in that: The compressor is a ZW650 scroll compressor, the first electronic expansion valve is an Emerson electronic expansion valve EX6, and the second electronic expansion valve is an Emerson electronic expansion valve EX5.

4. The rubber drying line according to claim 1, characterized in that: The compressor is arranged in an independent cavity.

5. The rubber drying line according to claim 1, characterized in that: It also includes a flexible evaporation circulation fan corresponding to the evaporator and a humidity sensor for detecting the humidity of the air entering the evaporator. The speed of the flexible evaporation circulation fan is adjusted according to the humidity of the air.

6. The rubber drying line according to claim 1, characterized in that: The conveyor belt comprises a chain net and a PP polyester net sleeved on the chain net. Two sides of the chain net are respectively provided with side-by-side double chains. The variable frequency motor drives the sprocket wheel, and the sprocket wheel drives the side-by-side double chains.

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