Environment-friendly energy-saving warming system for waste heat recovery

Abstract

The utility model discloses a waste heat recovery environment-friendly energy-saving temperature increasing system which comprises a machine shell, and a heat recovery device, a first temperature increasing device, a second temperature increasing device and a spraying device are arranged in the machine shell. The first warming device comprises a first compressor, a first condenser, a first throttle valve and a first evaporator, the second warming device comprises a second compressor, a second condenser, a second throttle valve and a second evaporator, and the second evaporator is provided with a liquid inlet pipe and a liquid outlet pipe; the spraying device comprises a spraying pipe and a collecting tank, and air in the air duct sequentially passes through the air return opening, the first channel, the spraying area, the first evaporator, the second channel, the second condenser and the first condenser and then reaches the air supply opening. The environment-friendly energy-saving heating system for waste heat recovery has the advantages that the energy-saving effect is excellent, the high-temperature drying requirement of an enterprise is met, and the environment-friendly performance is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy -conserving drying equipment technical field especially relates to a waste heat recovery's environmental protection energy -consaving temperature increasing system. BACKGROUND

[0002] Drying as a kind of ancient craft unit, it has been widely applied in various fields of social production and life. But at the same time, drying also consumes a large amount of energy in social production. Heat pump dryer as a new type of thermal equipment, its principle is according to the inverse Carnot principle, refrigerant gas is pressurized in compressor, becomes high temperature and high pressure gas, then enters condenser, in condenser, refrigerant condenses and liquefies, releases heat to improve the temperature of air in drying line. The material in drying line is vaporized and evaporated by the form of hot air, and the water vapor evaporated is removed by the exhaust system to achieve the purpose of drying material.

[0003] Adopting heat pump dryer for drying operation can continuously provide stable heat source for the dryer, and the heat pump drying technology has the advantages of less energy consumption, less environmental pollution, high drying quality and wide application range, and its excellent energy-saving effect has been proved by various domestic and foreign experimental institutes. Therefore, the heat pump drying technology also attracts much attention from the society. The existing heat pump dryer on the market generally provides low temperature heat source, which is difficult to meet the needs of some industrial high temperature drying. Moreover, the gas in many industrial drying lines contains certain acidic substances, and the acidic gas is easy to corrode the metal heat exchange device in the heat pump dryer after passing through the heat pump dryer, thereby affecting the service life of the heat pump dryer.

[0004] In the patent with publication number CN211651152U, a "heat recovery type heat pump unit for material drying" is disclosed, which includes a casing, a compressor set is arranged in the casing, a condenser set is connected to one side of the compressor set, and a working medium inlet of the condenser set is connected to an outlet of the compressor set, an evaporator set is connected to the other side of the compressor set, and a working medium outlet of the evaporator set is connected to an inlet of the compressor set, a working medium outlet of the condenser set is connected to a working medium inlet of the evaporator set, an air outlet for outputting hot air to a drying tower is formed in the casing near the condenser, and an air return for recycling waste heat air of the drying tower and acting on the evaporator is formed in the casing near the evaporator. However, the device only solves the problem of too much dust in the air returned from the drying line to the heat pump unit, and if the return air contains corrosive substances, the evaporator is easy to be corroded and has a short service life, and the air passing through the evaporator also needs to be treated to meet the standard before being discharged into the atmosphere.

[0005] Therefore, we propose a waste heat recovery environmental protection energy -consaving temperature increasing system. UTILITY MODEL CONTENTS

[0006] The utility model discloses a kind of waste heat recovery's environmental protection energy-saving temperature increasing systems, energy-saving effect is excellent, satisfy the high-temperature drying demand of enterprise, with good environmental protection performance.

[0007] In order to achieve the above object, the utility model adopts the following technical solutions:

[0008] A kind of waste heat recovery's environmental protection energy-saving temperature increasing system, comprising: cabinet, heat recovery device, first temperature increasing device, second temperature increasing device and spraying device are equipped in cabinet.

[0009] Air inlet and air outlet are equipped on the cabinet, and air duct is equipped in the cabinet and is communicated with air inlet and air outlet.

[0010] The heat recovery device includes first channel and second channel, and the air of first channel and second channel with temperature difference exchanges heat.

[0011] The first temperature increasing device includes first compressor, first condenser, first throttling valve and first evaporator, and refrigerant circulates between first compressor, first condenser, first throttling valve and first evaporator through first connecting copper pipe.

[0012] The second temperature increasing device includes second compressor, second condenser, second throttling valve and second evaporator, and refrigerant circulates between second compressor, second condenser, second throttling valve and second evaporator through second connecting copper pipe, and the second evaporator is equipped with liquid inlet pipe and liquid outlet pipe.

[0013] The spraying device includes spraying area, and spraying pipe is equipped in spraying area, and spraying pipe is equipped with spraying inlet, and the bottom of spraying area is equipped with collecting tank, and the collecting tank is equipped with collecting inlet, first outlet and second outlet.

[0014] Air in air duct passes through air inlet, first channel, spraying area, first evaporator, second channel, second condenser and first condenser in sequence, and reaches air outlet, the spraying inlet of spraying pipe is communicated with the liquid outlet pipe of second evaporator, the first outlet of collecting tank is communicated with the liquid inlet pipe of second evaporator, the collecting inlet of collecting tank is connected with medicament tank, and the second outlet of collecting tank is connected with recovery tank.

[0015] Further, the spraying pipe is arranged at the top of the spraying area, and a liquid collecting plate is arranged between the spraying pipe and the collecting tank.

[0016] Further, the liquid collecting plate is arranged below the spraying pipe, and a liquid collecting groove is arranged on the liquid collecting plate, and a plurality of through holes are arranged on the liquid collecting groove.

[0017] Further, a water baffle is arranged between the spraying area and the first evaporator.

[0018] Further, the collecting groove is arranged directly below the spraying area, the water baffle and the first evaporator.

[0019] Further, the compressor chamber is arranged in the casing and is separated from the air duct, and the first compressor, the first throttling valve, the second compressor, the second throttling valve and the second evaporator are arranged in the compressor chamber.

[0020] Further, the second evaporator is a titanium tube heat exchanger.

[0021] Further, the air inlet surface of the first evaporator is provided with a first pH detector, and the collecting groove is provided with a second pH detector.

[0022] The utility model discloses a casing, be equipped with heat recovery device, first temperature increasing device, second temperature increasing device and spraying device in casing, first temperature increasing device includes first compressor, first condenser, first throttling valve and first evaporator, and second temperature increasing device includes second compressor, second condenser, second throttling valve and second evaporator, and second evaporator is equipped with liquid inlet pipe and liquid outlet pipe, and spraying device includes spraying pipe and collecting groove, and the air in air duct reaches air supply port after passing through return air port, first channel, spraying area, first evaporator, second channel, second condenser, first condenser in proper order, this environmental protection and energy -conserving temperature increasing system of waste heat recovery's advantage lies in: through heat recovery device, the waste heat of higher temperature is recycled and reused, need not consume other energy input, makes the system have good energy -conserving effect, through multistage temperature increasing, whole system can provide higher drying temperature to drying line, can satisfy the drying temperature demand of enterprise, and spraying device reduces harmful substance in air duct, reduces the corrosion effect of air to heat exchanger, and the air of whole system and drying line adopts closed cycle, and harmful gas will not be discharged to air and pollute the environment, has good environmental protection performance. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The structure schematic diagram of the environmental protection and energy -conserving temperature increasing system of waste heat recovery is provided for the utility model,

[0024] Figure 2 The structure schematic diagram of the environmental protection and energy -conserving temperature increasing system of waste heat recovery is provided for the utility model, Figure 1 The local enlarged schematic diagram of A in,

[0025] Figure 3 The structure schematic diagram of the environmental protection and energy -conserving temperature increasing system of waste heat recovery is provided for the utility model. DETAILED DESCRIPTION

[0026] The utility model provides a kind of waste heat recovery's environmental protection energy -conserving temperature increasing system, to make the purpose, technical scheme and effect of the utility model more clear, definite, the following referring to drawing and taking example to further detail the utility model of embodiment.It should be understood that the specific embodiments described herein are merely intended to explain the utility model, and are not intended to limit the utility model.

[0027] The utility model provides a kind of waste heat recovery's environmental protection energy -conserving temperature increasing system, and its structure as Figures 1-3 Shown, comprising: casing 1, heat recovery device 2, first temperature increasing device 3, second temperature increasing device 4 and spraying device 5 are equipped in casing 1.Casing 1 is equipped with return air opening 11 and air supply opening 12, and air duct 13 that is equipped in casing 1 is communicated return air opening 11 and air supply opening 12.

[0028] The heat recovery device 2 includes first channel 21 and second channel 22, and the air of first channel 21 and second channel 22 with temperature difference exchanges heat, and the heat recovery device 2 in the utility model is plate type heat recovery heat exchange core, and first channel 21 and second channel 22 are equipped on the plate type heat recovery heat exchange core.

[0029] The first temperature increasing device 3 includes first compressor 31, first condenser 32, first throttling valve 33 and first evaporator 34, refrigerant circulates between first compressor 31, first condenser 32, first throttling valve 33 and first evaporator 34 by first connecting copper pipe 35, first compressor 31 compresses low-temperature low-pressure refrigerant gas to form high-temperature high-pressure refrigerant gas, and the high-temperature high-pressure refrigerant gas in first condenser 32 transfers heat to the air passing through first condenser 32, and the refrigerant condenses to liquid state, and the liquid refrigerant becomes low-pressure gas-liquid mixed refrigerant by throttling effect of first throttling valve 33, and the low-pressure refrigerant in first evaporator 34 absorbs the heat of surrounding heat exchange medium, and the refrigerant forms low-temperature low-pressure gaseous refrigerant, and returns to first compressor 31 for next cycle, so that the air passing through first condenser 32 is warmed, and the heat exchange medium passing through first evaporator 34 is cooled.

[0030] The second temperature increasing device 4 includes second compressor 41, second condenser 42, second throttling valve 43 and second evaporator 44, refrigerant circulates between second compressor 41, second condenser 42, second throttling valve 43 and second evaporator 44 by second connecting copper pipe 45, and the second evaporator 44 is equipped with liquid inlet pipe 441 and liquid outlet pipe 442, and the refrigerant in second evaporator 44 exchanges heat with solution.Similarly, the air passing through second condenser 42 is warmed, and the solution heat exchange medium passing through second evaporator 44 is cooled.

[0031] The spraying device 5 comprises a spraying area 51, a spraying pipe 52 is arranged in the spraying area 51, the spraying pipe 52 is provided with a spraying inlet 521, the bottom of the spraying area 51 is provided with a collecting groove 53, and the collecting groove 53 is provided with a collecting inlet 531, a first outlet 532 and a second outlet 533.

[0032] The air in the air duct 13 sequentially passes through the return air inlet 11, the first channel 21, the spraying area 51, the first evaporator 34, the second channel 22, the second condenser 42 and the first condenser 32, and then reaches the air outlet 12 and is sent to the drying line. The spraying inlet 521 of the spraying pipe 52 is communicated with the liquid outlet pipe 442 of the second evaporator 44, the first outlet 532 of the collecting groove 53 is communicated with the liquid inlet pipe 441 of the second evaporator 44, and the collecting inlet 531 of the spraying pipe 52 is connected with the medicament box 6. The utility model is exemplified by taking the return air containing sulfur dioxide or other acidic corrosive substances in the air duct 13, the medicament box 6 stores sodium hydroxide or other alkaline medicaments, and the medicament box 6 and the spraying pipe 52 adopt materials capable of containing alkaline medicaments. The second outlet 533 of the collecting groove 53 is connected with the recovery box 7. The medicament box 6 sends medicaments to the collecting groove 53, the medicaments are cooled by the first outlet 532 and the second evaporator 44, reach the spraying pipe 52 along the spraying inlet 521, spray the air in the spraying area 51, cool and deacidify the air, and the sprayed liquid is collected by the collecting groove 53. In this way, the low-temperature medicament is circulated to spray the air in the spraying area 51, the medicament box 6 intermittently inputs medicaments to the collecting groove 53, the medicaments are kept alkaline, the solution in the collecting groove 53 reaches a certain height, is discharged through the second outlet 533 and is post-treated.

[0033] The air is cooled after passing through the spraying area 51 and the first evaporator 34, the temperature of the air passing through the second channel 22 is lower than that of the air passing through the first channel 21, the temperature of the air passing through the first channel 21 is lowered, the temperature of the air passing through the second channel 22 is raised, the higher-temperature air returning from the drying line to the waste heat recovery, environment-friendly and energy-saving temperature increasing system provided by the utility model firstly reaches the first channel 21 through the return air inlet 11 to exchange heat, is preliminarily cooled, is cooled again through the spraying area 51 and the first evaporator 34, meanwhile, the medicaments in the spraying pipe 52 are neutralized with the acidic substances in the air, the corrosiveness of the harmful substances in the air is reduced, the first evaporator 34 cools and dehumidifies the air, the low-temperature dry air is preliminarily heated again through the second channel 22, is gradually heated through the second condenser 42 and the first condenser 32, and high-temperature dry air is formed, which is sent back to the drying line to continue drying the materials.

[0034] The heat recovery device 2 recycles the high-temperature waste heat, which is beneficial to the heat exchange temperature of the air at the evaporator and the condenser, and improves the energy efficiency ratio of the whole system without consuming other energy inputs, thereby achieving good energy-saving effect. The spraying device 5 reduces harmful substances in the air duct 13 and reduces the corrosion of the air on the heat exchanger, thereby prolonging the service life of the whole system. After multi-stage temperature increase, the whole system can provide a higher drying temperature to the drying line, which can meet the drying temperature requirements of enterprises. The air of the whole system and the drying line adopts closed circulation, and harmful gases will not be discharged into the air to pollute the environment, thereby achieving good environmental protection effect.

[0035] Specifically, the spraying pipe 52 is arranged at the top of the spraying area 51, and a liquid collecting plate 54 is arranged between the spraying pipe 52 and the collecting groove 53 to prevent the liquid in the spraying pipe 52 from being sprayed in other areas and being difficult to collect. The liquid collecting plate 54 is arranged around the lower part of the spraying pipe 52, and the liquid collecting plate 54 is provided with a liquid collecting groove 541, and a plurality of through holes are arranged on the liquid collecting groove 541. The liquid in the liquid collecting groove 541 can fall into the collecting groove 53 through the through holes. This liquid collecting structure is simple and can effectively prevent the liquid from being sprayed to the rack of the system and damaging the quality of the rack.

[0036] Specifically, the water baffle 8 is arranged between the spraying area 51 and the first evaporator 34. The water baffle 8 reduces the liquid content in the air entering the first evaporator 34, so that the humidity of the air entering the first evaporator 34 is low, the wet load of the first evaporator 34 is reduced, the load of the first evaporator 34 is prevented from being too high, and the system cannot be stably operated. At the same time, the water baffle prevents the unvaporized acidic or alkaline liquid from entering the first evaporator 34 and damaging the quality of the first evaporator 34.

[0037] Specifically, the collecting groove 53 is arranged directly below the spraying area 51, the water baffle 8 and the first evaporator 34. The collecting groove 53 can collect the liquid of the water baffle 8 and the condensed liquid of the first evaporator 34. If the liquid is not completely reacted with the liquid in the spraying area 51, it can continue to react with the liquid in the collecting groove 53 after entering the collecting groove 53, and then be collected and treated. In this way, the collected liquid will not be directly discharged into the environment, so that the system has good environmental protection performance.

[0038] Specifically, the compressor chamber 14 is arranged in the casing 1 and is separated from the air duct 13. The first compressor 31, the first throttling valve 33, the second compressor 41, the second throttling valve 43 and the second evaporator 44 are arranged in the compressor chamber 14. The system components in the compressor chamber 14 are separated from the air duct 13, and the corrosive substances in the return air of the drying line cannot corrode the system components in the compressor chamber 14, thereby ensuring the service life of the whole system.

[0039] Specifically, the second evaporator 44 is a titanium tube heat exchanger, which has good corrosion resistance and good heat exchange performance.

[0040] Specifically, the air inlet face of the first evaporator 34 is provided with a first pH detector 341, and the collecting tank 53 is provided with a second pH detector 531.

[0041] In summary, the utility model discloses a shell, be equipped with heat recovery device, first temperature increasing device, second temperature increasing device and spraying device in the shell, first temperature increasing device includes first compressor, first condenser, first throttle valve and first evaporator, second temperature increasing device includes second compressor, second condenser, second throttle valve and second evaporator, and second evaporator is equipped with liquid inlet pipe and liquid outlet pipe, and spraying device includes spraying pipe and collecting tank, and the air in air duct passes through air return, first channel, spraying area, first evaporator, second channel, second condenser, first condenser in proper order and reaches air supply port. The heat recovery's environmental protection energy -conserving temperature increasing system's advantage lies in: through heat recovery device, the higher temperature waste heat is recovered and is reused, need not consume other energy input, makes the system have good energy -conserving effect. After multistage temperature increasing, whole system can provide higher drying temperature to drying line, can satisfy the drying temperature demand of enterprise. Spraying device reduces harmful substance in air duct, reduces the corrosion effect of air to heat exchanger, and the air of whole system and drying line adopts closed cycle, and harmful gas will not be discharged to air pollution environment, has better environmental protection performance.

[0042] It should be understood that, for those skilled in the art, improvements or changes can be made according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the utility model.

Claims

1. A waste heat recovery, environmentally friendly, energy saving and temperature increasing system, characterized in that, The utility model relates to a heat recovery device, a first temperature increasing device, a second temperature increasing device and a spraying device are arranged in a casing. The casing is provided with an air return inlet and an air supply outlet, and a duct is arranged in the casing to communicate the air return inlet and the air supply outlet. The heat recovery device comprises a first channel and a second channel, and the air in the first channel and the air in the second channel exchange heat. The first temperature increasing device comprises a first compressor, a first condenser, a first throttling valve and a first evaporator, and a refrigerant circulates among the first compressor, the first condenser, the first throttling valve and the first evaporator through a first connecting copper pipe. The second temperature increasing device comprises a second compressor, a second condenser, a second throttling valve and a second evaporator, and a refrigerant circulates among the second compressor, the second condenser, the second throttling valve and the second evaporator through a second connecting copper pipe. The spraying device comprises a spraying area, and a spraying pipe is arranged in the spraying area. The air in the duct passes through the air return inlet, the first channel, the spraying area, the first evaporator, the second channel, the second condenser and the first condenser in sequence, and then reaches the air supply outlet. The spraying inlet of the spraying pipe is communicated with the liquid outlet of the second evaporator, the first outlet of the collecting tank is communicated with the liquid inlet of the second evaporator, the collecting inlet of the collecting tank is connected with a medicament tank, and the second outlet of the collecting tank is connected with a recovery tank.

2. The waste heat recovery, environmentally friendly, energy saving, and temperature increasing system according to claim 1, characterized in that: The spraying pipe is arranged at the top of the spraying area, and a liquid collecting plate is arranged between the spraying pipe and the collecting tank.

3. The waste heat recovery, environmentally friendly, energy saving, and temperature increasing system of claim 2, wherein: The liquid collecting plate is arranged around the bottom of the spraying pipe, and a liquid collecting groove is arranged on the liquid collecting plate.

4. The waste heat recovery, environmentally friendly, energy saving, and temperature increasing system of claim 1, wherein: A water baffle is arranged between the spraying area and the first evaporator.

5. The waste heat recovery, environmentally friendly, energy saving, and temperature increasing system according to claim 4, characterized in that: The collecting tank is arranged directly below the spraying area, the water baffle and the first evaporator.

6. The waste heat recovery, environmentally friendly, energy saving, and temperature increasing system of claim 1, wherein: A compressor chamber is arranged in the casing and separated from the duct, and the first compressor, the first throttling valve, the second compressor, the second throttling valve and the second evaporator are arranged in the compressor chamber.

7. The waste heat recovery, environmentally friendly, energy saving, and temperature increasing system of claim 1, wherein: The second evaporator is a titanium tube heat exchanger.

8. The waste heat recovery, environmentally friendly, energy saving, and temperature increasing system of claim 1, wherein: A first pH detector is arranged on the air inlet surface of the first evaporator, and a second pH detector is arranged in the collecting tank.

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