Temperature control device for waste heat recovery of paperboard air compressor

Abstract

The utility model relates to the technical field of paperboard air compressors, and discloses a temperature control device for waste heat recovery of a paperboard air compressor, which comprises an air tank, a base, a top cover, a waste heat recovery processing mechanism and a heat exchange processing mechanism, the waste heat recovery treatment mechanism is further divided into a waste heat recovery gas pretreatment assembly and a waste heat recovery connecting pipeline temperature control assembly, the waste heat recovery gas pretreatment assembly is subjected to multi-stage filtration through an oil-gas separation filter element and a secondary filter box, it is ensured that gas entering the heat exchange treatment mechanism is clean, and the waste heat treatment effect is improved; the pressure detection device, the pressure relief pipeline and the galvanized connecting pipe are used for effectively detecting and controlling the pipeline pressure and preventing abnormal pressure accumulation, meanwhile, the galvanized pipe is resistant to corrosion and high in strength, the pipeline breakage risk can be reduced, heat exchange between hot air and water is achieved through the heat exchange treatment mechanism, and hot water can be used as workshop or process water; according to the device, the stability, the safety and the efficiency of a waste heat recovery system are improved, and an efficient and energy-saving waste heat recovery scheme is provided for paperboard production enterprises.

Description

Technical Field

[0001] This utility model relates to the field of cardboard air compressor technology, specifically a temperature control device for waste heat recovery in cardboard air compressors. Background Technology

[0002] In the paperboard production process, air compressors, as important equipment, generate a large amount of waste heat. Recovering and utilizing this waste heat not only reduces energy consumption but also aligns with the concept of green production. As a new type of high-efficiency waste heat utilization equipment, it is mainly used to solve problems such as domestic heating, waste heat cooling, and product drying.

[0003] According to a patent application published on the internet (authorization announcement number: CN215058007U), "This utility model is a temperature control device for waste heat recovery of a cardboard air compressor, comprising a body, which includes an oil-gas separator, a cooling box, a water tank, a condensate tank, and a filter box. The cooling box has a cooling pipe with a spiral structure inside. The condensate tank is connected to the cooling box, the filter box, and the water tank by pipes. The cooling box and the filter box are connected by an air supply pipe. The filter box has a filter screen and a heat exchanger. The filter screen has filter filler. The spiral structure of the cooling pipe increases the heat exchange efficiency. The condensate tank absorbs moisture from the air and flows into other equipment. The air enters the filter box through the air supply pipe and the condensate tank. The air is purified by the filter screen and filter filler in the filter box. The purified air enters the heat exchanger for heat exchange. The recovery rate is high, and resource consumption is reduced."

[0004] Based on the above, the applicant believes the following deficiencies exist:

[0005] Most commonly used waste heat recovery devices use PVC pipes. Due to long-term use and aging, high heat and excessive pressure can affect the service life and service cycle of PVC pipes, which will seriously affect the waste heat recovery efficiency of the device. Utility Model Content

[0006] The purpose of this invention is to provide a temperature control device for waste heat recovery from a cardboard air compressor, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a temperature control device for waste heat recovery of a cardboard air compressor, comprising a gas tank, a base fixedly connected to the bottom of the gas tank, a top cover provided on the top of the gas tank, a waste heat recovery processing mechanism provided on the surface and right end of the gas tank, the waste heat recovery processing mechanism comprising a waste heat recovery gas pretreatment component and a waste heat recovery connecting pipe temperature control component, and a heat exchange processing mechanism provided on the right end of the gas tank;

[0008] The waste heat recovery connecting pipe temperature control assembly includes a first galvanized connecting pipe. The waste heat recovery gas pretreatment assembly includes an outlet pipe and a secondary filter box. The first galvanized connecting pipe is installed at the right end of the outlet pipe. A sealing valve is installed on the surface of the first galvanized connecting pipe. A pressure detection device is installed on the surface of the first galvanized connecting pipe, and an alarm is installed on the surface of the pressure detection device. A pressure relief pipe is fixedly connected to the back of the first galvanized connecting pipe near the secondary filter box. A pressure relief valve is installed on the surface of the pressure relief pipe. An exhaust pipe is fixedly connected to the bottom right end of the secondary filter box. An exhaust control valve is installed on the surface of the exhaust pipe. A second galvanized connecting pipe is installed at the right end of the exhaust pipe. A connecting air pump is installed at the end of the second galvanized connecting pipe away from the exhaust pipe. During preheating recovery operations, pressure detection devices are used to monitor the internal pressure of the pipeline. These devices respond quickly to even minor pressure spikes, effectively preventing excessive pressure buildup. Warnings can be issued via pressure relief pipes. Pressure relief valves and exhaust pipes, installed in high-pressure sections, can promptly release excessive pressure within the pipeline, protecting the entire system. Installation near critical equipment prevents damage due to localized high pressure. Furthermore, the zinc coating formed on the surfaces of the first and second galvanized connecting pipes provides excellent corrosion resistance, effectively protecting against erosion from humid, acidic, or alkaline media present in the waste heat recovery system. The galvanized pipes also possess high strength, capable of withstanding pressure fluctuations and reducing the risk of pipe rupture.

[0009] Preferably, the first galvanized connecting pipe is disposed between the gas tank and the secondary filter box, and the end of the first galvanized connecting pipe away from the gas outlet pipe is installed at the top left end of the secondary filter box.

[0010] Preferably, the surfaces of the first galvanized connecting pipe and the second galvanized connecting pipe are each provided with a pressure detection device, an alarm, a pressure relief pipe, and a pressure relief valve.

[0011] Preferably, the waste heat recovery gas pretreatment assembly includes an oil-gas separation filter element, which is disposed inside the gas tank. A fixing base is fixedly connected to the bottom of the oil-gas separation filter element, and an air inlet is fixedly connected to the center of the top of the oil-gas separation filter element. An air outlet pipe is fixedly connected to the bottom right end of the gas tank, and an air inlet duct is fixedly connected to the center of the top of the top cover. An air inlet valve is installed on the surface of the air inlet duct. A secondary filter box is disposed at the right end of the gas tank. Insertion sockets are fixedly connected to the left and right ends inside the secondary filter box, and filter plates are inserted into the insertion sockets. A fixed connection is made to the top of the secondary filter box. The system is equipped with a fixed frame, inside which a guide fan is installed. A dustproof net is installed at the bottom of the fixed frame. An inspection door is installed on the front of the secondary filter box, and a filter plate extraction port is opened on the front of the inspection door. The hot air discharged from the air compressor enters the air tank and is separated into oil and gas by an oil-gas separator filter element to ensure that the air entering the next component is free of oil and gas. Then the air enters the secondary filter box and is guided by the guide fan. The air undergoes multi-stage filtration through the filter plates. These components ensure that the air entering the heat exchange treatment mechanism remains clean, thereby improving the waste heat treatment effect of the device.

[0012] Preferably, the oil-gas separator filter element is inserted into the center of the gas tank via a fixing seat, and the air inlet is connected to the air inlet duct.

[0013] Preferably, the filter plates and the filter plate extraction ports are in one-to-one correspondence, and the filter plates are extracted through the filter plate extraction ports.

[0014] Preferably, the fixed frame, guide fan and dustproof net are provided in four sets, and the filter plate and filter plate extraction port are provided in three sets.

[0015] Preferably, the heat exchange treatment mechanism includes a sealed heat exchange treatment box, which is located at the right end of the gas tank. A pipe rack is installed inside the sealed heat exchange treatment box. Support feet are fixedly connected to the bottom of both ends of the sealed heat exchange treatment box. Heat exchange tubes are installed inside the sealed heat exchange treatment box. A front door is installed on the front of the sealed heat exchange treatment box. An air outlet pipe is fixedly connected to the top of the right end of the sealed heat exchange treatment box. An end air pump is installed on the surface of the air outlet pipe. A water inlet pipe is fixedly connected to the top right rear end of the sealed heat exchange treatment box. A drain pump is installed at the bottom right rear end of the sealed heat exchange treatment box. A hot water outlet pipe is fixedly connected to the bottom of the drain pump.

[0016] Preferably, a second galvanized connecting pipe is provided at the right end of the gas tank, the left end of the heat exchange pipe is connected to the second galvanized connecting pipe, and the right end of the heat exchange pipe is connected to the gas outlet pipe.

[0017] Preferably, the heat exchange treatment mechanism includes a sealed heat exchange treatment box, and the end of the second galvanized connecting pipe away from the exhaust control valve and the exhaust pipe is installed at the top left end of the sealed heat exchange treatment box.

[0018] Compared with the prior art, this utility model provides a temperature control device for waste heat recovery in a cardboard air compressor, which has the following advantages:

[0019] 1. The temperature control device for waste heat recovery in this cardboard air compressor is equipped with a temperature control component for the waste heat recovery connecting pipe. During preheating recovery operations, a pressure detection device is used to monitor the internal pressure of the pipe. The pressure detection device can respond quickly to minor abnormal increases in pipe pressure, effectively preventing excessive pressure accumulation. Warnings can be issued through the pressure relief pipe. The installation of pressure relief valves and exhaust pipes in high-pressure sections can promptly release excessive pressure within the pipes, protecting the entire pipeline system. Installation near critical equipment can specifically prevent equipment damage due to excessive local pressure. Furthermore, the zinc layer formed on the surface of the first and second galvanized connecting pipes has excellent corrosion resistance, effectively resisting corrosion from humid, acidic, or alkaline media that may exist in the waste heat recovery system. The galvanized pipes also have high strength, capable of withstanding a certain degree of pressure fluctuations, reducing the risk of pipe rupture.

[0020] 2. The temperature control device for waste heat recovery of the cardboard air compressor is equipped with a waste heat recovery gas pretreatment component. The hot air discharged from the air compressor enters the gas tank and is separated into oil and gas by an oil-gas separator filter element to ensure that the gas entering the next component is free of oil and gas. Then the gas enters the secondary filter box and is guided by a guide fan. The gas undergoes multi-stage filtration through filter plates. These components can ensure that the gas entering the heat exchange treatment mechanism remains clean, thereby improving the waste heat treatment effect of the device. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the waste heat recovery gas pretreatment component of this utility model.

[0024] Figure 3 This is a schematic diagram of the waste heat recovery connection pipe temperature control component of this utility model.

[0025] Figure 4 This is a schematic diagram of the internal structure of the secondary filter box of this utility model;

[0026] Figure 5 This is a schematic diagram of the heat exchange mechanism of this utility model.

[0027] In the diagram: 1. Gas tank; 2. Base; 3. Top cover; 4. Waste heat recovery treatment mechanism; 41. Waste heat recovery gas pretreatment component; 411. Oil-gas separator filter element; 412. Air inlet; 413. Fixing base; 414. Air inlet duct; 4141. Air outlet pipe; 415. Air inlet valve; 416. Secondary filter box; 417. Connector; 418. Filter plate; 419. Fixing frame; 4101. Guide fan; 4102. Dustproof net; 4103. Inspection door; 4104. Filter plate extraction port; 42. Waste heat recovery connection pipeline temperature control. Components; 421, First galvanized connecting pipe; 422, Sealing valve; 423, Pressure detection device; 424, Alarm; 425, Pressure relief pipe; 426, Pressure relief valve; 427, Exhaust pipe; 428, Exhaust control valve; 429, Second galvanized connecting pipe; 4201, Connecting air pump; 5, Heat exchange treatment mechanism; 51, Sealed heat exchange treatment box; 511, Support leg; 52, Pipe rack; 53, Heat exchange tube; 54, Front door; 55, Exhaust pipe; 56, Terminal air pump; 57, Water inlet pipe; 58, Drain pump; 59, Hot water outlet pipe. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] This utility model provides the following technical solution:

[0031] Example 1

[0032] Please see Figure 1-5A temperature control device for waste heat recovery of a cardboard air compressor includes a gas tank 1, a base 2 fixedly connected to the bottom of the gas tank 1, a top cover 3 provided on the top of the gas tank 1, a waste heat recovery treatment mechanism 4 provided on the surface and right end of the gas tank 1, the waste heat recovery treatment mechanism 4 includes a waste heat recovery gas pretreatment component 41 and a waste heat recovery connecting pipe temperature control component 42, and a heat exchange treatment mechanism 5 provided on the right end of the gas tank 1.

[0033] The waste heat recovery connecting pipe temperature control assembly 42 includes a first galvanized connecting pipe 421. The waste heat recovery gas pretreatment assembly 41 includes an outlet pipe 4141 and a secondary filter box 416. The first galvanized connecting pipe 421 is installed at the right end of the outlet pipe 4141. A sealing valve 422 is installed on the surface of the first galvanized connecting pipe 421. A pressure detection device 423 is installed on the surface of the first galvanized connecting pipe 421. An alarm 424 is installed on the surface of the pressure detection device 423. A pressure relief pipe 425 is fixedly connected to the back of the first galvanized connecting pipe 421 near the secondary filter box 416. A pressure relief valve 426 is installed on the surface of the pressure relief pipe 425. An exhaust pipe 427 is fixedly connected to the bottom right end of the secondary filter box 416. An exhaust control valve 428 is installed on the surface of the exhaust pipe 427. A second galvanized connecting pipe 429 is installed at the right end of the exhaust pipe 427, away from the exhaust pipe 42. One end of 7 is connected to an air pump 4201. When the device is performing preheating recovery operations, a pressure detection device 423 is used to detect the pressure inside the pipeline. The pressure detection device 423 can respond quickly when the pipeline pressure shows a slight abnormal increase, effectively preventing excessive pressure accumulation. A warning can be issued through the pressure relief pipe 425. The installation of the pressure relief valve 426 and the exhaust pipe 427 can release excessive pressure in the pipeline in a timely manner in the high-pressure section, protecting the entire pipeline system. The installation near critical equipment can specifically prevent equipment from being damaged due to excessive local pressure. At the same time, the zinc layer formed on the surface of the first galvanized connecting pipe 421 and the second galvanized connecting pipe 429 has good corrosion resistance and can effectively resist the corrosion of humid, acidic or alkaline media that may exist in the waste heat recovery system. The galvanized pipe also has high strength and can withstand a certain degree of pressure fluctuation, reducing the risk of pipeline rupture.

[0034] The first galvanized connecting pipe 421 is disposed between the gas tank 1 and the secondary filter box 416, and the end of the first galvanized connecting pipe 421 away from the gas outlet pipe 4141 is installed at the top left end of the secondary filter box 416.

[0035] The surfaces of the first galvanized connecting pipe 421 and the second galvanized connecting pipe 429 are each equipped with a pressure detection device 423, an alarm 424, a pressure relief pipe 425, and a pressure relief valve 426.

[0036] The waste heat recovery gas pretreatment assembly 41 includes an oil-gas separation filter element 411, which is disposed inside the gas tank 1. A fixing base 413 is fixedly connected to the bottom of the oil-gas separation filter element 411, and an air inlet 412 is fixedly connected to the center of the top of the oil-gas separation filter element 411. An air outlet pipe 4141 is fixedly connected to the bottom of the right end of the gas tank 1. An air inlet pipe 414 is fixedly connected to the center of the top of the top cover 3. An air inlet valve 415 is installed on the surface of the air inlet pipe 414. A secondary filter box 416 is disposed at the right end of the gas tank 1. Insertion seats 417 are fixedly connected to the left and right ends of the interior of the secondary filter box 416. Filter plates 418 are inserted into the insertion seats 417. A fixing frame is fixedly connected to the top of the interior of the secondary filter box 416. The frame 419 has a guide fan 4101 installed inside and a dustproof net 4102 installed at the bottom. The secondary filter box 416 has an inspection door 4103 on the front and a filter plate extraction port 4104 on the front of the inspection door 4103. The hot air discharged from the air compressor enters the air tank 1 and is separated into oil and gas by the oil-gas separation filter element 411 to ensure that the gas entering the next component is free of oil and gas. Then the gas enters the secondary filter box 416 and is guided by the guide fan 4101. The gas is filtered through the filter plate 418 for multiple stages. These components can ensure that the gas entering the heat exchange treatment mechanism 5 remains clean, thereby improving the waste heat treatment effect of the device.

[0037] The oil-gas separator filter element 411 is inserted into the center of the gas tank 1 through the fixing base 413, and the air inlet 412 is connected to the air inlet pipe 414;

[0038] The filter plate 418 and the filter plate outlet 4104 are in one-to-one correspondence, and the filter plate 418 is extracted through the filter plate outlet 4104.

[0039] The fixed frame 419, the guide fan 4101 and the dustproof net 4102 are provided in four sets, and the filter plate 418 and the filter plate extraction port 4104 are provided in three sets.

[0040] Example 2

[0041] Please see Figure 1-5 Furthermore, based on Embodiment 1, the heat exchange treatment mechanism 5 further includes a sealed heat exchange treatment box 51, which is located at the right end of the gas tank 1. A pipe rack 52 is installed inside the sealed heat exchange treatment box 51. Support feet 511 are fixedly connected to the bottom of the left and right ends of the sealed heat exchange treatment box 51. Heat exchange tubes 53 are installed inside the sealed heat exchange treatment box 51. A front door 54 is installed on the front of the sealed heat exchange treatment box 51. An air outlet pipe 55 is fixedly connected to the top right end of the sealed heat exchange treatment box 51. A terminal air pump 56 is installed on the surface of the air outlet pipe 55. A water inlet pipe 57 is fixedly connected to the top right rear end of the sealed heat exchange treatment box 51. A drain pump 58 is installed at the bottom right rear end of the sealed heat exchange treatment box 51. A hot water outlet pipe 59 is fixedly connected to the bottom of the drain pump 58.

[0042] A second galvanized connecting pipe 429 is provided at the right end of the gas tank 1. The left end of the heat exchange pipe 53 is connected to the second galvanized connecting pipe 429, and the right end of the heat exchange pipe 53 is connected to the gas outlet pipe 55.

[0043] The heat exchange treatment mechanism 5 includes a sealed heat exchange treatment box 51, and one end of the second galvanized connecting pipe 429 away from the exhaust control valve 428 and the exhaust pipe 427 is installed at the top left end of the sealed heat exchange treatment box 51.

[0044] In actual operation, when this device is in use, the hot air discharged from the air compressor will enter the air tank 1 and be separated into oil and gas by the oil-gas separator filter element 411 to ensure that the gas entering the next component is free of oil and gas. Then the gas will enter the secondary filter box 416 and be guided by the guide fan 4101. The gas will undergo multi-stage filtration by the filter plate 418. These components can ensure that the gas entering the heat exchange treatment mechanism 5 remains clean, thereby improving the waste heat treatment effect of the device. The oil-gas separator filter element 411 and the filter plate 418 can be removed for cleaning and maintenance after use, thereby ensuring the effective operation of the subsequent work.

[0045] During the preheating and recovery operation, a pressure detection device 423 is used to detect the pressure inside the pipeline. The pressure detection device 423 can respond quickly when there is a slight abnormal increase in pipeline pressure, effectively preventing excessive pressure accumulation. A warning can be issued through the pressure relief pipe 425. The installation of the pressure relief valve 426 and the exhaust pipe 427 in the high-pressure section can release excessive pressure in the pipeline in time, protecting the entire pipeline system. The installation near the critical equipment can specifically prevent the equipment from being damaged due to excessive local pressure. At the same time, the zinc layer formed on the surface of the first galvanized connecting pipe 421 and the second galvanized connecting pipe 429 has good corrosion resistance and can effectively resist the corrosion of humid, acidic or alkaline media that may exist in the waste heat recovery system. The galvanized pipe also has high strength and can withstand a certain degree of pressure fluctuation, reducing the risk of pipeline rupture.

[0046] The hot air ultimately enters the heat exchange tube 53 for use. Workers inject water through the inlet pipe 57, which then exchanges heat through the heat exchange tube 53 to heat the water. The cooled gas is then discharged through the terminal air pump 56 and the outlet pipe 55. Hot water is discharged through the drain pump 58 and the hot water outlet pipe 59 and stored in an insulated water tank for heating domestic or process water in the workshop, meeting the workshop's daily water needs. The waste heat recovery temperature control device for the cardboard air compressor optimizes pipeline pressure and temperature by introducing a pressure relief valve and replacing it with galvanized pipes, significantly improving the system's stability, safety, and waste heat utilization efficiency. The pressure-temperature coordinated control mechanism and comprehensive safety protection measures ensure reliable system operation under complex operating conditions. The application of this device will bring cardboard manufacturing companies a more efficient, energy-saving, and safe waste heat recovery solution, helping them achieve their sustainable development goals.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A temperature control device for waste heat recovery from a cardboard air compressor, comprising an air tank (1), characterized in that: The gas tank (1) is fixedly connected to a base (2) at the bottom, and a top cover (3) is provided on the top of the gas tank (1). A waste heat recovery treatment mechanism (4) is provided on the surface and right end of the gas tank (1). The waste heat recovery treatment mechanism (4) includes a waste heat recovery gas pretreatment component (41) and a waste heat recovery connecting pipe temperature control component (42). A heat exchange treatment mechanism (5) is provided on the right end of the gas tank (1). The waste heat recovery connecting pipe temperature control assembly (42) includes a first galvanized connecting pipe (421), and the waste heat recovery gas pretreatment assembly (41) includes an outlet pipe (4141) and a secondary filter box (416). The first galvanized connecting pipe (421) is installed at the right end of the outlet pipe (4141). A shut-off valve (422) is installed on the surface of the first galvanized connecting pipe (421), and a pressure detection device (423) is installed on the surface of the first galvanized connecting pipe (421). An alarm (424) is installed on the surface of the pressure detection device (423). A pressure relief pipe (425) is fixedly connected to the back of the galvanized connecting pipe (421) near the secondary filter box (416). A pressure relief valve (426) is installed on the surface of the pressure relief pipe (425). An exhaust pipe (427) is fixedly connected to the bottom right end of the secondary filter box (416). An exhaust control valve (428) is installed on the surface of the exhaust pipe (427). A second galvanized connecting pipe (429) is installed at the right end of the exhaust pipe (427). A connecting air pump (4201) is installed at the end of the second galvanized connecting pipe (429) away from the exhaust pipe (427).

2. The temperature control device for waste heat recovery from a cardboard air compressor according to claim 1, characterized in that: The first galvanized connecting pipe (421) is disposed between the gas tank (1) and the secondary filter box (416), and the end of the first galvanized connecting pipe (421) away from the gas outlet pipe (4141) is installed on the top left side of the secondary filter box (416).

3. The temperature control device for waste heat recovery from a cardboard air compressor according to claim 1, characterized in that: The first galvanized connecting pipe (421) and the second galvanized connecting pipe (429) are each provided with a pressure detection device (423), an alarm (424), a pressure relief pipe (425) and a pressure relief valve (426).

4. The temperature control device for waste heat recovery from a cardboard air compressor according to claim 1, characterized in that: The waste heat recovery gas pretreatment component (41) includes an oil-gas separation filter element (411), which is disposed inside the gas tank (1). A fixing base (413) is fixedly connected to the bottom of the oil-gas separation filter element (411), and an air inlet (412) is fixedly connected to the center of the top of the oil-gas separation filter element (411). An air outlet pipe (4141) is fixedly connected to the bottom of the right end of the gas tank (1), and an air inlet duct (414) is fixedly connected to the center of the top of the top cover (3). An air inlet valve (415) is installed on the surface of the air inlet duct (414), and an air outlet valve (415) is provided on the right end of the gas tank (1). A secondary filter box (416) is provided. The two ends of the secondary filter box (416) are fixedly connected to the plug-in sockets (417). Filter plates (418) are inserted into the plug-in sockets (417). A fixed frame (419) is fixedly connected to the top of the secondary filter box (416). A guide fan (4101) is installed inside the fixed frame (419). A dustproof net (4102) is installed at the bottom of the fixed frame (419). An inspection door (4103) is installed on the front of the secondary filter box (416). A filter plate extraction port (4104) is opened on the front of the inspection door (4103).

5. A temperature control device for waste heat recovery from a cardboard air compressor according to claim 4, characterized in that: The oil-gas separator filter element (411) is inserted into the center of the gas tank (1) via a fixing seat (413), and the air inlet (412) is connected to the air inlet duct (414).

6. The temperature control device for waste heat recovery from a cardboard air compressor according to claim 4, characterized in that: The filter plate (418) and the filter plate extraction port (4104) correspond one-to-one, and the filter plate (418) is extracted through the filter plate extraction port (4104).

7. A temperature control device for waste heat recovery from a cardboard air compressor according to claim 4, characterized in that: The fixed frame (419), guide fan (4101) and dustproof net (4102) are provided in four sets, and the filter plate (418) and filter plate extraction port (4104) are provided in three sets.

8. A temperature control device for waste heat recovery from a cardboard air compressor according to claim 1, characterized in that: The heat exchange treatment mechanism (5) includes a sealed heat exchange treatment box (51), which is located at the right end of the gas tank (1). A pipe rack (52) is installed inside the sealed heat exchange treatment box (51). Support feet (511) are fixedly connected to the bottom of the left and right ends of the sealed heat exchange treatment box (51). Heat exchange tubes (53) are installed inside the sealed heat exchange treatment box (51). A front door (54) is installed on the front of the sealed heat exchange treatment box (51). An air outlet pipe (55) is fixedly connected to the top right end of the sealed heat exchange treatment box (51). An end air pump (56) is installed on the surface of the air outlet pipe (55). A water inlet pipe (57) is fixedly connected to the top right rear end of the sealed heat exchange treatment box (51). A drain pump (58) is installed at the bottom right rear end of the sealed heat exchange treatment box (51). A hot water outlet pipe (59) is fixedly connected to the bottom of the drain pump (58).

9. A temperature control device for waste heat recovery from a cardboard air compressor according to claim 8, characterized in that: The gas tank (1) is provided with a second galvanized connecting pipe (429) on the right end. The heat exchange pipe (53) is connected to the second galvanized connecting pipe (429) on the left end and to the gas outlet pipe (55) on the right end.

10. A temperature control device for waste heat recovery from a cardboard air compressor according to claim 1, characterized in that: The heat exchange treatment mechanism (5) includes a sealed heat exchange treatment box (51), and the end of the second galvanized connecting pipe (429) away from the exhaust control valve (428) and the exhaust pipe (427) is installed at the top left end of the sealed heat exchange treatment box (51).

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