Waste gas treatment system, refrigerator recovery treatment method and equipment and storage medium

Abstract

The invention discloses a waste gas treatment system, a refrigerator recovery treatment method and device and a storage medium, and the waste gas treatment system comprises a first air blower connected with an air inlet of a refrigerator crushing mechanism and used for blowing air into the refrigerator crushing mechanism to dilute waste gas generated in the refrigerator crushing process to obtain first waste gas; the waste gas dust removal mechanism is connected with an air outlet of the refrigerator crushing mechanism and used for conducting waste gas dust removal operation on the first waste gas gushing out of the air outlet of the refrigerator crushing mechanism, and second waste gas is obtained; the second air blower is connected with the waste gas dust removal mechanism and an air inlet of the foam winnowing machine and used for blowing the second waste gas into the foam winnowing machine so as to conduct winnowing treatment on the foam to obtain third waste gas carrying the foam. According to the waste refrigerator crushing treatment device, the problem that combustion and explosion accidents are prone to occurring in the existing waste refrigerator crushing treatment process is solved, waste gas recycling is achieved, and the waste gas treatment amount and treatment energy consumption are reduced.

Description

Technical Field

[0001] This invention relates to the field of waste equipment recycling technology, and in particular to a waste gas treatment system and a refrigerator recycling method, equipment and storage medium. Background Technology

[0002] With the increasing level of automation, waste refrigerators are generally crushed and sorted to recycle valuable materials such as foam, plastic, and metal. Although the crushing and sorting process improves efficiency, it also brings safety and waste gas treatment issues, which have attracted great attention.

[0003] In some technologies, cyclopentane (C5H) 10 Cyclopentane is a foaming agent used to manufacture refrigerator doors or cabinets. Because its chemical composition does not contain chlorine or fluorine, it is widely used as a foaming agent to replace Freon in insulation materials for refrigerators and freezers, as well as other rigid PU foams. Cyclopentane has the lowest gas-phase thermal conductivity among alkane foaming agents. As a typical alkane foaming agent, cyclopentane foaming is now widely used by domestic refrigerator manufacturers.

[0004] However, cyclopentane is a flammable and explosive gas with a lower explosive limit of only 1.4% VOL and an auto-ignition temperature of 361°C. During the process of crushing waste refrigerators, the foam material in the refrigerator will also be crushed, producing flammable (cyclopentane) gas. When the concentration of flammable gas reaches a certain level, combustion and explosion accidents may occur. Summary of the Invention

[0005] The purpose of this invention is to provide at least one waste gas treatment system and refrigerator recycling method, equipment and storage medium, which can at least solve the technical problem that combustion and explosion accidents are prone to occur during the existing crushing process of waste refrigerators. It can at least achieve the technical effect of diluting the combustible gas generated during the crushing process with air, so as to significantly reduce the concentration of combustible gas. After the gas is purified by foam air separation after crushing, the waste gas can be recycled, thereby reducing the amount of waste gas to be treated and the energy consumption of treatment.

[0006] To address the aforementioned technical problems, at least one embodiment of this application provides an exhaust gas treatment system, comprising: The first blower is connected to the air inlet of the refrigerator crushing mechanism and is used to blow air into the refrigerator crushing mechanism to dilute the exhaust gas generated during the refrigerator crushing process and obtain the first exhaust gas. The exhaust gas dust removal mechanism is connected to the air outlet of the refrigerator crushing mechanism and is used to perform exhaust gas dust removal operation on the first exhaust gas gushing out from the air outlet of the refrigerator crushing mechanism to obtain the second exhaust gas. The second blower is connected to the air inlet of the exhaust gas dust removal mechanism and the foam air separator, respectively, and is used to blow the second exhaust gas into the foam air separator to perform air separation treatment on the foam to obtain the third exhaust gas carrying the foam.

[0007] At least one embodiment of this application also provides a refrigerator recycling method, comprising at least: The refrigerator is crushed using a refrigerator crushing mechanism to obtain foam. The foam obtained after crushing is subjected to air separation using a foam air separator to obtain a third waste gas carrying foam. In the crushing and air separation processes, the aforementioned waste gas treatment system performs the following operations: The exhaust gas generated during the refrigerator crushing process is diluted to obtain the first exhaust gas; The first waste gas is subjected to a dust removal operation to obtain a second waste gas, which is then blown into the foam air separator as the air source for the air separation process.

[0008] In some optional embodiments, the method further includes: detecting the gas concentration of the first exhaust gas at the air outlet of the refrigerator crushing mechanism; When the gas concentration of the first exhaust gas is detected to be greater than the first preset concentration threshold, the air volume at the air inlet of the refrigerator crushing mechanism is increased. When the gas concentration of the first exhaust gas is detected to be less than the second preset concentration threshold, the air volume at the air inlet of the refrigerator crushing mechanism is reduced. Wherein, the first preset concentration threshold is greater than the second preset concentration threshold.

[0009] In some optional embodiments, the method further includes: sorting the solid mixture remaining after the air separation process, excluding the foam, to obtain metals and plastics.

[0010] At least one embodiment of this application also provides an electronic device, including: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the refrigerator recycling method described above.

[0011] At least one embodiment of this application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described refrigerator recycling method.

[0012] The waste gas treatment system, refrigerator recycling method, equipment, and storage medium provided in the embodiments of this application utilize a first blower to blow air into the refrigerator crushing mechanism to dilute the waste gas generated during the refrigerator crushing process, resulting in a first waste gas. Then, a waste gas dust removal mechanism removes dust from the first waste gas exiting the refrigerator crushing mechanism, resulting in a second waste gas. Next, a second blower blows the second waste gas into a foam air separator to perform air separation treatment on the foam, resulting in a third waste gas carrying foam. In this way, by diluting the combustible gas generated during the crushing process with air, the concentration of combustible gas is significantly reduced. The diluted gas is then purified and used for foam air separation, achieving waste gas recycling and reducing the amount of waste gas treated and energy consumption.

[0013] In some optional embodiments, the refrigerator crushing mechanism includes a shredder and a crusher. The first blower is used to connect to the air inlets of the shredder and the crusher respectively, and to blow air into the shredder and the crusher respectively to dilute the exhaust gas generated during the shredding and crushing of the refrigerator. The diluted exhaust gas flows out from the air outlets of the shredder and the crusher respectively and merges to obtain the first exhaust gas.

[0014] In this way, by blowing fresh air into the shredder and crusher, the flammable gases generated during the shredding and crushing of the refrigerator are diluted, and the concentration of flammable gases is greatly reduced, so as to ensure that the entire crushing process is safe and reliable.

[0015] In some optional embodiments, the exhaust gas dust removal mechanism includes: a third blower, a first bag filter, and an activated carbon adsorption box; the third blower is used to sequentially blow the first exhaust gas into the first bag filter and the activated carbon adsorption box, so that the first exhaust gas is subjected to organic gas adsorption to obtain the second exhaust gas.

[0016] In this way, the gas diluted during the crushing process is adsorbed by particulate matter and organic gases to obtain a second waste gas, which is then used in the foam air separator to achieve the recycling of waste gas and reduce the amount of waste gas to be treated and the energy consumption for treatment.

[0017] In some optional embodiments, the system further includes a concentration detection mechanism installed at the air outlet of the refrigerator crushing mechanism, for detecting the gas concentration of the first exhaust gas, the gas concentration of the first exhaust gas being used to control the air volume at the air inlet of the first blower.

[0018] In this way, by detecting the concentration of the first exhaust gas, the airflow into the shredder and crusher can be controlled to reduce the gas concentration in the shredder and crusher to a safe range, thereby reducing the probability of an explosion caused by excessively high concentrations of flammable gas at high temperatures.

[0019] In some optional embodiments, it further includes: an exhaust gas air separation mechanism connected to the air outlet of the foam air separator, for air separation of the foam in the third exhaust gas.

[0020] In this way, by applying the third type of waste gas to the foam air separator, the waste gas can be recycled, reducing the amount of waste gas to be treated and the energy consumption for treatment.

[0021] In some optional embodiments, the exhaust gas separation mechanism includes: A cyclone dust collector, the air inlet of which is connected to the air outlet of the foam air separator, is used to collect large pieces of foam in the third waste gas; The second bag filter, whose inlet is connected to the outlet of the cyclone dust collector, is used to collect small particles of foam in the third waste gas by air separation, and simultaneously obtain purified gas.

[0022] In this way, the third type of waste gas is used in the collection of large pieces of foam and small particles of foam, realizing the recycling of waste gas, and obtaining purified gas after waste gas treatment.

[0023] In some alternative embodiments, the first blower is also used to mix the purified gas with the air and blow it into the refrigerator crushing mechanism.

[0024] In this way, the waste gas can be reused and the amount of air used can be reduced. The second waste gas diluted during the crushing process can be used in the air separation process of foam, and the third waste gas can be purified again and returned to the crushing process, thus further realizing the recycling of waste gas and reducing the amount of waste gas to be treated and the energy consumption of treatment. Attached Figure Description

[0025] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, and these illustrative descriptions do not constitute a limitation on the embodiments.

[0026] Figure 1 This is a schematic diagram of a waste gas treatment system provided in one embodiment of this application; Figure 2 This is a schematic flowchart of a refrigerator recycling method provided in one embodiment of this application; Figure 3 This is a schematic diagram of the structure of a refrigerator recycling and processing device provided in one embodiment of this application; Figure 4 This is a schematic diagram of the structure of an electronic device provided in another embodiment of this application; Figure 5 This is a schematic diagram of a waste gas treatment system provided in another embodiment of this application. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this application to help readers better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments. The division of the various embodiments below is for the convenience of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.

[0028] To facilitate understanding of the embodiments of this application, relevant content regarding the exhaust gas treatment system will be introduced first.

[0029] With the increasing level of automation, waste refrigerators are generally crushed and sorted to recycle valuable materials such as foam, plastic, and metal. Although the crushing and sorting process improves efficiency, it also brings safety and waste gas treatment issues, which have attracted great attention.

[0030] In some technologies, cyclopentane (C5H) 10 Cyclopentane is a foaming agent used to manufacture refrigerator doors or cabinets. Because its chemical composition does not contain chlorine or fluorine, it is widely used as a foaming agent to replace Freon in insulation materials for refrigerators and freezers, as well as other rigid PU foams. Cyclopentane has the lowest gas-phase thermal conductivity among alkane foaming agents. As a typical alkane foaming agent, cyclopentane foaming is now widely used by domestic refrigerator manufacturers.

[0031] However, cyclopentane is a flammable and explosive gas with a lower explosive limit of only 1.4% VOL and an auto-ignition temperature of 361°C. During the process of crushing waste refrigerators, the foam material in the refrigerator will also be crushed, producing flammable (cyclopentane) gas. When the concentration of flammable gas reaches a certain level, combustion and explosion accidents may occur.

[0032] To address the technical problem that existing methods of crushing used refrigerators can result in the breakage of foamed materials within the refrigerator body, generating combustible (cyclopentane) gas, which could potentially lead to combustion or explosion when the concentration of this gas reaches a certain level, this invention proposes a waste gas treatment system. The implementation details of this waste gas treatment system are described below. The following details are provided for ease of understanding and are not essential for implementing this solution.

[0033] Example 1: This embodiment provides a waste gas treatment system, such as Figure 1As shown, the exhaust gas treatment system is used for refrigerator recycling; the exhaust gas treatment system includes: The first blower is connected to the air inlet of the refrigerator crushing mechanism and is used to blow air into the refrigerator crushing mechanism to dilute the exhaust gas generated during the refrigerator crushing process and obtain the first exhaust gas. The exhaust gas dust removal mechanism is connected to the air outlet of the refrigerator crushing mechanism and is used to perform exhaust gas dust removal operation on the first exhaust gas that flows out from the air outlet of the refrigerator crushing mechanism to obtain the second exhaust gas. The second blower is connected to the air inlet of the exhaust gas dust removal mechanism and the foam air separator, respectively, and is used to blow the second exhaust gas into the foam air separator to perform air separation treatment on the foam to obtain the third exhaust gas carrying the foam.

[0034] Specifically, before processing used refrigerators using a refrigerator crushing mechanism, the refrigerant inside the refrigerator needs to be recovered and the compressor removed. During the crushing process, the foam material inside the refrigerator is also crushed, generating combustible (cyclopentane) gas, i.e., waste gas. Therefore, in this application, fresh air is blown into the refrigerator crushing mechanism by a first blower to dilute the waste gas generated during crushing, obtaining a first waste gas with a concentration within a safe range. After obtaining the first waste gas, a waste gas dust removal mechanism is used to remove dust from the first waste gas, adsorbing the cyclopentane and particulate matter, thus obtaining a second waste gas. At this point, the cyclopentane and particulate matter in the second waste gas have been adsorbed. A second blower is connected to the inlet of both the waste gas dust removal mechanism and the foam air separator, allowing the second waste gas from the waste gas dust removal mechanism to be transported to the foam air separator for foam separation, achieving waste gas recycling. After the foam air separator separates the foam, due to the light weight of the foam, it can move with the second exhaust gas input by the second blower, thus obtaining a third exhaust gas carrying the foam. In some examples, both the first and second blowers are variable frequency fans, which can be used to adjust the air volume blown into the refrigerator crushing mechanism and the air volume blown into the foam air separator.

[0035] In this embodiment, a first blower blows air into the refrigerator crushing mechanism to dilute the exhaust gas generated during the crushing process, resulting in first exhaust gas. Then, an exhaust gas dust removal mechanism removes dust from the first exhaust gas exiting the refrigerator crushing mechanism, resulting in second exhaust gas. Next, a second blower blows the second exhaust gas into a foam air separator to separate the foam, resulting in third exhaust gas containing foam. Thus, by diluting the combustible gas generated during the crushing process with air, the concentration of combustible gas is significantly reduced. The diluted gas is then purified and used for foam air separation, achieving waste gas recycling and reducing the amount of waste gas treated and energy consumption.

[0036] In some embodiments, the refrigerator crushing mechanism includes a shredder and a crusher. A first blower is used to connect to the air inlets of the shredder and the crusher respectively, and to blow air into the shredder and the crusher respectively to dilute the exhaust gas generated during the shredding and crushing of the refrigerator. The diluted exhaust gas flows out from the air outlets of the shredder and the crusher respectively and merges to form the first exhaust gas.

[0037] Specifically, when processing used refrigerators, the refrigerators are sequentially shredded and crushed by a shredder and a crusher. Simultaneously, air is blown into both the shredder and crusher to dilute the exhaust gases generated during the shredding and crushing processes. The diluted exhaust gases then exit from the outlets of the shredder and crusher and converge to form the first exhaust gas. This first exhaust gas is the diluted exhaust gas (containing combustible gas (cyclopentane), but the gas concentration is within safe limits). In some cases, when blowing air into the shredder and crusher, a top-in, bottom-out approach is preferred to avoid potential blockages. Furthermore, the shredder and crusher are interlocked with the blower; if the first blower malfunctions, both the shredder and crusher immediately stop operating, further enhancing safety.

[0038] In some cases, air effectively dilutes the cyclopentane combustible gas produced in the discarded refrigerator, controlling its concentration below 0.7% VOL (50% of the lower explosive limit). Simultaneously, the continuous influx of large amounts of air significantly reduces the heat generated by the high-speed rotation of the shredder and crusher blades during the shredding and crushing process. Furthermore, the initial waste gas is gradually cooled to room temperature during subsequent purification and transport processes, ensuring that the entire shredding and crushing process is conducted under absolutely safe conditions regarding combustible gas concentration and temperature.

[0039] In this way, by blowing fresh air into the shredder and crusher, the flammable gases generated during the shredding and crushing of the refrigerator are diluted, and the concentration of flammable gases is greatly reduced, so as to ensure that the entire crushing process is safe and reliable.

[0040] In some embodiments, the exhaust gas dust removal mechanism includes: a third blower, a first bag filter and an activated carbon adsorption box; the third blower is used to sequentially blow the first exhaust gas into the first bag filter and the activated carbon adsorption box, so that the first exhaust gas is adsorbed with organic gases to obtain the second exhaust gas.

[0041] Specifically, the gas passing through the shredder and crusher contains organic gas with cyclopentane (first waste gas) and a certain amount of particulate matter. The cyclopentane and particulate matter in the first waste gas are absorbed by the waste gas dust removal mechanism to obtain purified first waste gas (i.e., second waste gas). At this point, the second waste gas does not contain combustible gas (cyclopentane) or particulate matter. In this embodiment, the first waste gas is blown into the first bag filter by a third blower to separate the particulate matter from the first waste gas. The first waste gas after particulate matter separation is then blown into an activated carbon adsorption box to adsorb the cyclopentane, thereby obtaining the second waste gas. In some examples, the third blower is a variable frequency blower, which can be used to adjust the airflow of the first waste gas into the first bag filter.

[0042] In some cases, the second exhaust gas, based on the airflow requirements of the foam air separator, is used for foam air separation after passing through a second blower (frequency converter). Observing the foam air separator, if foam is found in the plastic mixture at the outlet, the frequency of the second blower is increased to increase the airflow, causing the foam to be blown to the downstream dust removal equipment. Based on a processing capacity of 100 waste refrigerators per hour, the required airflow for air separation is approximately 20,000 m³ / h. 3 / H, this portion of the exhaust gas is recycled and enters the foam air separator for foam separation. The total air volume entering the shredder and crusher is approximately 32,000 m³. 3 / H, excluding the airflow entering the air separator, the other 12000m 3 The second exhaust gas from / H is discharged to the outside through a bypass valve.

[0043] In this way, the gas diluted during the crushing process is adsorbed by particulate matter and organic gases to obtain a second waste gas, which is then used in the foam air separator to achieve the recycling of waste gas and reduce the amount of waste gas to be treated and the energy consumption for treatment.

[0044] In some embodiments, the exhaust gas treatment system further includes: a concentration detection mechanism installed at the air outlet of the refrigerator crushing mechanism, for detecting the gas concentration of the first exhaust gas, the gas concentration of the first exhaust gas being used to control the air volume at the air inlet of the first blower.

[0045] Specifically, after diluting the exhaust gas generated by the shredder and crusher to obtain the first exhaust gas, a concentration detection device is used to detect the combustible gas concentration in the first exhaust gas in order to control the air volume blown into the shredder and crusher by the first blower. In some examples, the concentration detection device includes a combustible gas detector.

[0046] In some cases, the airflow of the first blower can also be adjusted via an external frequency converter. When the combustible gas concentration is below 0.05% VOL, the frequency of the frequency converter and the airflow of the first blower can be reduced, and the minimum airflow of the first blower shall not be less than 20,000 m³ / h. 3 / H, which ensures that the waste gas generated in the crushing environment is continuously diluted, and also meets the needs of the subsequent foam sorting machine; if the concentration of combustible gas is higher than 0.3%VOL, the frequency of the inverter and the air volume of the first blower are increased to keep the concentration of combustible gas always within the safe range of below 0.3%VOL.

[0047] In some cases, the amount of cyclopentane used in each refrigerator is less than 0.3 kg (300 g). Since cyclopentane has a molecular weight of 70, each refrigerator produces 4.29 mol of cyclopentane. Each mol completely vaporizes to produce approximately 22.4 L of gas, meaning each refrigerator produces 96 L of combustible gas. Therefore, 100 discarded refrigerators per hour would produce 9.6 m³ of combustible gas. 3 Combustible gases (such as cyclopentane) can easily fill the shredder and crusher housing without protection, creating an explosive atmosphere. Considering that the lower explosive limit of cyclopentane is only 1.4% VOL, it is preferable to control the concentration of combustible gases below 0.3% VOL to ensure absolute safety. Therefore, the air blown into the shredder or crusher needs to reach 32,000 m³ / h. 3 / H.

[0048] In this way, by detecting the concentration of the first exhaust gas, the airflow into the shredder and crusher can be controlled to reduce the gas concentration in the shredder and crusher to a safe range, thereby reducing the probability of an explosion caused by excessively high concentrations of flammable gas at high temperatures.

[0049] In some embodiments, the exhaust gas treatment system further includes an exhaust gas air separation mechanism connected to the outlet of the foam air separator for air separation of foam in the third exhaust gas.

[0050] Specifically, after the foam air separator performs air separation on the foam, the foam moves with the second exhaust gas input by the second blower, thus obtaining a third exhaust gas carrying foam. In this embodiment, the third exhaust gas output from the outlet of the foam air separator is used by an exhaust gas air separation mechanism to separate the foam in the third exhaust gas by the airflow force of the third exhaust gas. In this way, by applying the third exhaust gas to the foam air separation, the exhaust gas is recycled, reducing the amount of exhaust gas treated and the energy consumption.

[0051] In some embodiments, the exhaust gas separation mechanism includes: Cyclone dust collector: The air inlet of the cyclone dust collector is connected to the air outlet of the foam air separator, and it is used to collect large pieces of foam in the third waste gas. The second bag filter is connected to the outlet of the cyclone dust collector. It is used to collect small particles of foam in the third waste gas by air separation, and simultaneously obtain purified gas.

[0052] Specifically, the waste refrigerator is shredded into large pieces using a shredder, and then further crushed into smaller pieces using a crusher. Consequently, the foam (insulation material) will also consist of large pieces and small particles. In this embodiment, the third waste gas carries both large and small pieces of foam. A cyclone dust collector collects the large pieces of foam from the third waste gas, while a second bag filter collects the small particles of foam from the separated large pieces using air separation, resulting in purified gas. This purified gas is free of combustible gas (cyclopentane), particulate matter, and foam. Thus, the third waste gas is used for collecting both large and small pieces of foam, achieving waste gas recycling and ensuring that the treated waste gas is purified.

[0053] In some embodiments, the first blower is also used to mix the purified gas with air and blow it into the refrigerator crushing mechanism.

[0054] Specifically, after collecting the foam in the third waste gas, the purified gas is mixed with air and blown into the crushing chamber of the refrigerator crushing mechanism by the first blower. This not only enables the reuse of waste gas but also reduces air consumption. The second waste gas, diluted during the crushing process, is used in the foam air separation process, and the third waste gas, after further purification, is returned to the crushing process, further realizing the recycling of waste gas and reducing the amount of waste gas treated and energy consumption.

[0055] In some embodiments, the exhaust gas treatment system further includes a controller connected to a first blower, a refrigerator crushing mechanism, an exhaust gas dust removal mechanism, a foam air separator, an exhaust gas air separation mechanism, and a concentration detection mechanism.

[0056] The controller controls the first blower to blow air into the refrigerator crushing mechanism, diluting the exhaust gas generated by the crushing mechanism to obtain the first exhaust gas. Then, by controlling the third blower, the first exhaust gas exiting the refrigerator crushing mechanism is blown into the exhaust gas dust removal mechanism, which removes dust from the first exhaust gas to obtain the second exhaust gas. Next, the second blower blows the second exhaust gas into a foam air separator for foam separation, obtaining the third exhaust gas containing foam. The foam in the third exhaust gas is then collected by the exhaust gas air separator, resulting in purified gas. This purified gas is then returned to the crushing process, mixed with air, and blown into the crushing chamber of the refrigerator crushing mechanism, further realizing the recycling of exhaust gas and reducing the amount of exhaust gas treated and energy consumption.

[0057] Example 2: This embodiment provides a refrigerator recycling and treatment method based on the waste gas treatment system of Embodiment 1, such as... Figure 2 As shown, the refrigerator recycling and processing method includes at least the following: Step 201: Use a refrigerator crushing mechanism to crush the refrigerator to obtain foam.

[0058] Specifically, the refrigerator shredding mechanism includes a shredder and a crusher. When processing used refrigerators, the refrigerators are sequentially shredded and crushed by the shredder and crusher. Specifically, the shredder shreds the used refrigerator into large pieces, and then the crusher further breaks these large pieces into smaller pieces. The foam (insulation) inside the refrigerator is also broken down into large pieces and small particles. After shredding and crushing the used refrigerator, in addition to producing foam, a solid mixture is also generated.

[0059] Step 202: The foam obtained after crushing is subjected to air separation using a foam air separator to obtain the third waste gas carrying the foam.

[0060] Specifically, after obtaining the foam, the second blower is controlled to blow the second waste gas into the foam air separator to perform foam air separation treatment on the foam obtained after crushing, and a third waste gas carrying the foam is obtained.

[0061] In the crushing and air separation processes, the waste gas treatment system as described in Example 1 is used to perform the following operations: The exhaust gas generated during the refrigerator crushing process is diluted to obtain the first exhaust gas; The first waste gas is subjected to a dust removal process to obtain a second waste gas, which is then blown into the foam air separator as the air source for the air separation process.

[0062] Specifically, the first blower is controlled to blow air into the refrigerator crushing mechanism to dilute the exhaust gas generated by the refrigerator crushing mechanism, resulting in the first exhaust gas. Then, the third blower is controlled to blow the first exhaust gas from the outlet of the refrigerator crushing mechanism into the exhaust gas dust removal mechanism, which performs dust removal on the first exhaust gas, resulting in the second exhaust gas. Finally, the second blower is controlled to blow the second exhaust gas into a foam air separator for foam separation treatment, resulting in the third exhaust gas containing foam.

[0063] In this embodiment, the foam in the third waste gas can be collected by controlling the waste gas air separation mechanism to obtain purified gas, and the purified gas can be returned to the crushing process, mixed with air and blown into the crushing chamber of the refrigerator crushing mechanism, so as to further realize the recycling of waste gas and reduce the amount of waste gas treated and the energy consumption of treatment.

[0064] In some embodiments, the refrigerator recycling method further includes: detecting the gas concentration of the first waste gas at the air outlet of the refrigerator crushing mechanism; When the gas concentration of the first exhaust gas is detected to be greater than the first preset concentration threshold, the air volume at the air inlet of the refrigerator crushing mechanism is increased. When the gas concentration of the first exhaust gas is detected to be less than the second preset concentration threshold, the air volume at the air inlet of the refrigerator crushing mechanism is reduced. The first preset concentration threshold is greater than the second preset concentration threshold.

[0065] Specifically, a gas concentration detector is connected to the air outlet of the refrigerator crushing mechanism to detect the concentration of the first exhaust gas. When the detected concentration of the first exhaust gas is greater than a first preset concentration threshold, the airflow at the air inlet of the refrigerator crushing mechanism is increased; when the detected concentration of the first exhaust gas is less than a second preset concentration threshold, the airflow at the air inlet of the refrigerator crushing mechanism is decreased. Furthermore, the airflow of the first blower is greater than or equal to the airflow threshold for air separation. In some examples, the first preset concentration threshold is set to 0.3% VOL. The airflow of the first blower can also be adjusted via an external frequency converter. When the combustible gas concentration is higher than 0.3% VOL, the frequency of the frequency converter and the airflow of the first blower are increased to keep the combustible gas concentration within a safe range below 0.3% VOL. The second preset concentration threshold is set to 0.05% VOL. When the combustible gas concentration is lower than 0.05% VOL, the frequency of the frequency converter and the airflow of the first blower can be reduced, and the minimum airflow of the first blower is not less than 20,000 m³ / h. 3 / H ensures that the exhaust gas generated in the crushing environment is continuously diluted, and also ensures the air volume required by the subsequent foam sorting machine.

[0066] In some embodiments, the refrigerator recycling method further includes: sorting the solid mixture remaining after air separation, excluding foam, to obtain metal and plastic materials.

[0067] After shredding and crushing waste refrigerators, in addition to producing foam, a solid mixture is also generated. This solid mixture is a mixture of metal and plastic. The remaining solid mixture after air separation, excluding the foam, is then sorted to obtain the metal and plastic components.

[0068] Example 3: like Figure 5 As shown, this embodiment provides exemplary content for Embodiment 1 and Embodiment 2, namely, providing an exemplary process of an exhaust gas treatment system and a refrigerator recycling method based on the exhaust gas treatment system, specifically including: The recycling of used refrigerators follows relevant environmental protection requirements. Refrigerant must be recovered first, and the compressor must be dismantled to facilitate subsequent recycling. Multi-stage crushing and sorting methods are used to recover valuable materials. Typically, the used refrigerator is shredded into large pieces, then further crushed into smaller pieces. This also separates the foam (insulation cotton) into smaller pieces, essentially separating it. Since the foam is very light, air separation is used to separate the crushed foam first. Then, magnetic separation, eddy current separation, and electrostatic separation technologies are used to further separate the remaining plastics and metals.

[0069] The following process uses a waste refrigerator sorting line with a capacity of 100 units / hour as an example. The specific details are as follows: Recycle the refrigerant from used refrigerators and remove the compressor.

[0070] Turn on the blower (variable frequency) (i.e., the first blower) to blow fresh air into the shredder and crusher. The blower is a variable frequency blower, linked to the combustible gas detector at the outlet. If the following control method is adopted: the combustible gas concentration is below 0.05% VOL, the frequency converter frequency and blower air volume can be reduced, and the minimum air volume of the first blower is not less than 20,000 m³ / h. 3 / H, ensuring continuous dilution of the crushing environment while meeting the needs of the subsequent instant noodle sorting blower; if the flammable gas concentration exceeds 0.3% VOL, the inverter frequency and blower airflow are increased to consistently control the flammable gas concentration below the safe range of 0.3% VOL. According to relevant data, the amount of cyclopentane used in each refrigerator is less than 0.3 kg, or 300 g. With a molecular weight of 70, each refrigerator produces 4.29 mol of cyclopentane. Each mol completely vaporizes to approximately 22.4 L of gas, meaning each refrigerator produces 96 L of flammable gas. Therefore, 100 discarded refrigerators per hour would produce 9.6 m³ of flammable gas. 3 Combustible gases (such as cyclopentane) can easily fill the shredder and crusher housing without protection, creating an explosive atmosphere. Considering that the lower explosive limit of cyclopentane is only 1.4% VOL, it is preferable to control the concentration of combustible gases below 0.3% VOL to ensure absolute safety. Therefore, the air blown into the shredder or crusher needs to reach 32,000 m³ / h. 3 / H.

[0071] The air introduced should preferably enter from the top and exit from the bottom of the shredder and crusher. Avoid a bottom-in, top-out airflow method, as this may cause blockages.

[0072] The shredder and crusher are interlocked with the blower. If the blower malfunctions, the shredder and crusher will stop working, further increasing safety.

[0073] Air effectively dilutes the cyclopentane flammable gas produced in the discarded refrigerator, controlling its concentration below 0.7% VOL (50% of the lower explosive limit). Simultaneously, the continuous influx of air significantly reduces the heat generated by the high-speed rotation of the blades during the shredding and crushing process; tests show the gas temperature remained below 40°C. Furthermore, during subsequent purification and transport, the gas is gradually cooled to room temperature, ensuring the entire shredding and crushing process is conducted under absolutely safe conditions regarding flammable gas concentration and temperature.

[0074] The gas passing through the shredder and crusher contains organic gases including cyclopentane, as well as a certain amount of particulate matter. It is drawn out from the bottom of the crusher and shredder by the exhaust fan (i.e., the third blower), and purified by the adsorption of organic gases (cyclopentane) by the dust collector (preferred bag filter) (i.e., the first bag filter) and activated carbon box.

[0075] The purified gas, according to the air volume requirements of the foam air separator, is used for foam air separation after passing through a foam air separator blower (frequency converter) (i.e., the third blower). Observe the foam air separator; if foam is found in the plastic mixture at the air separator outlet, increase the frequency and air volume of the foam air separator blower to blow the foam to the downstream dust removal equipment. Based on a processing capacity of 100 waste refrigerators per hour, the required air separation air volume is approximately 20,000 m³ / h. 3 / H, this portion of the exhaust gas is recycled and enters the air separator for air separation of foam. The total air volume entering the shredder and crusher is approximately 32,000 m³. 3 / H, excluding the airflow entering the air separator, the other 12000m 3 The purified exhaust gas from / H is discharged to the outside through a bypass valve.

[0076] After passing through a foam separator, the exhaust gas carries the foam into a two-stage dust collector. The first stage uses a cyclone separator to collect large pieces of foam, while the second stage uses a bag filter to collect small foam particles. The exhaust gas exiting the separator is purified while collecting the foam.

[0077] After the foam is air-separated, the gas removed from the foam separation enters the blower as dilution gas, which then enters the shredder and crusher for recycling. Simultaneously, a fresh air inlet valve is installed at the blower inlet to achieve overall airflow balance through the blower's variable frequency airflow adjustment.

[0078] In the above implementation cases, approximately 62.5% of the air volume was recycled, which greatly reduced the energy consumption of the safety system.

[0079] In this embodiment, a large amount of air is used to dilute the crushing process, significantly reducing the concentration of combustible gases. A combustible gas detector is used in conjunction with a blower to adjust the blower's airflow, ensuring the entire process is safe and reliable, effectively and continuously reducing the concentration of combustible gases, and completely eliminating the source of combustion and explosion hazards. Furthermore, the air diluted during the crushing process is purified and then sent to the air separation process of the foam; after further purification, it is returned to the crushing process. This achieves the recycling of waste gas, reducing the amount of waste gas treated and energy consumption.

[0080] Example 4: Another embodiment of this application relates to a refrigerator recycling and processing device. The implementation details of this refrigerator recycling and processing device are described below. The following details are for ease of understanding and are not essential for implementing this solution. A schematic diagram of the refrigerator recycling and processing device in this embodiment can be seen as follows: Figure 3 As shown, it includes: The crushing module 301 is used to crush a refrigerator using a refrigerator crushing mechanism to obtain foam. The air separation module 302 is used to perform air separation on the foam obtained after crushing using a foam air separator to obtain the third waste gas carrying the foam.

[0081] When using the crushing module 301 and the air separation module 302, the waste gas treatment system as described in Example 1 performs the following operations: The exhaust gas generated during the refrigerator crushing process is diluted to obtain the first exhaust gas; The first waste gas is subjected to a dust removal process to obtain a second waste gas, which is then blown into the foam air separator as the air source for the air separation process.

[0082] In some embodiments, the refrigerator recycling processing device further includes: The detection module is used to detect the gas concentration of the first exhaust gas at the air outlet of the refrigerator crushing mechanism; The first control module is used to control the increase of the air volume at the air inlet of the refrigerator crushing mechanism when the gas concentration of the first exhaust gas is detected to be greater than the first preset concentration threshold. The second control module is used to control the reduction of the air volume at the air inlet of the refrigerator crushing mechanism when the gas concentration of the first exhaust gas is detected to be less than the second preset concentration threshold. The first preset concentration threshold is greater than the second preset concentration threshold.

[0083] In some embodiments, the refrigerator recycling processing device further includes: The sorting module is used to separate the solid mixture remaining after air classification, excluding foam, to obtain metals and plastics.

[0084] It is worth mentioning that all modules involved in this embodiment are logical modules. In practical applications, a logical unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. Furthermore, to highlight the innovative aspects of this application, this embodiment does not introduce units that are not closely related to solving the technical problems proposed in this application; however, this does not mean that other units are absent in this embodiment.

[0085] Example 5: Another embodiment of this application relates to an electronic device, such as... Figure 4 As shown, it includes: at least one processor 901; and a memory 902 communicatively connected to the at least one processor 901; wherein the memory 902 stores instructions executable by the at least one processor 901, the instructions being executed by the at least one processor 901 to enable the at least one processor 901 to perform the refrigerator recycling processing method in the above embodiments.

[0086] The memory and processor are connected via a bus, which can include any number of interconnecting buses and bridges, connecting various circuits of one or more processors and memories. The bus can also connect various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and will not be described further herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be a single element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices over a transmission medium. Data processed by the processor is transmitted over the wireless medium via an antenna, which further receives data and transmits it to the processor.

[0087] The processor manages the bus and general processing, and also provides various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory is used to store data used by the processor during operation.

[0088] Example 6: Another embodiment of this application relates to a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the method embodiments described above.

[0089] That is, those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0090] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing this application, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of this application.

Claims

1. An exhaust gas treatment system, characterized by, The system comprises: a first air blower connected to an air inlet of a refrigerator breaking mechanism, for blowing air into the refrigerator breaking mechanism to dilute waste gas generated during the breaking process of the refrigerator, to obtain first waste gas; a waste gas dedusting mechanism connected to an air outlet of the refrigerator breaking mechanism, for performing waste gas dedusting operation on the first waste gas flowing out of the air outlet of the refrigerator breaking mechanism, to obtain second waste gas; a second air blower connected to air inlets of the waste gas dedusting mechanism and a foam air separation machine, for blowing the second waste gas into the foam air separation machine to perform air separation treatment on the foam, to obtain third waste gas carrying the foam.

2. The exhaust treatment system of claim 1, wherein, The refrigerator breaking mechanism comprises a shredder and a crusher, and the first air blower is used to connect air inlets of the shredder and the crusher respectively, for blowing air into the shredder and the crusher respectively to dilute waste gas generated during the shredding and crushing processes of the refrigerator, and the diluted waste gas flows out of air outlets of the shredder and the crusher respectively and converges to obtain the first waste gas.

3. The exhaust treatment system of claim 1, wherein, The waste gas dedusting mechanism comprises a third air blower, a first bag-type dust collector and an activated carbon adsorption tank, and the third air blower is used to blow the first waste gas into the first bag-type dust collector and the activated carbon adsorption tank in sequence to obtain the second waste gas after adsorbing organic gas from the first waste gas.

4. The exhaust treatment system of claim 3, wherein, The system further comprises: a concentration detection mechanism installed at the air outlet of the refrigerator breaking mechanism, for detecting the gas concentration of the first waste gas, and the gas concentration of the first waste gas is used to control the air volume of the air inlet of the first air blower.

5. The exhaust treatment system of claim 1, wherein, The system further comprises: a waste gas air separation mechanism connected to an air outlet of the foam air separation machine, for performing air separation on the foam in the third waste gas.

6. The exhaust treatment system of claim 5, wherein, The waste gas air separation mechanism comprises: a cyclone dust collector, an air inlet of the cyclone dust collector being connected to an air outlet of the foam air separation machine, for collecting large pieces of foam in the third waste gas; a second bag-type dust collector, an air inlet of the second bag-type dust collector being connected to an air outlet of the cyclone dust collector, for performing air separation and collection on small particles of foam in the third waste gas, to obtain purified gas synchronously.

7. The exhaust treatment system of claim 6, wherein, The first air blower is further used to mix the purified gas with the air and blow them into the refrigerator breaking mechanism.

8. A refrigerator recycling processing method, characterized by, The method comprises at least: breaking a refrigerator by using a refrigerator breaking mechanism to obtain foam; performing air separation treatment on the foam obtained after the breaking process by using a foam air separation machine to obtain third waste gas carrying the foam; wherein, during the breaking process and the air separation process, the waste gas treatment system as claimed in any one of claims 1-7 is used to perform the following operations: diluting waste gas generated during the breaking process of the refrigerator to obtain first waste gas; performing waste gas dedusting operation on the first waste gas to obtain second waste gas, and blowing the second waste gas into the foam air separation machine as air source for the air separation process.

9. The refrigerator recycling processing method of claim 8, characterized by, The method further comprises: detecting the gas concentration of the first waste gas at the air outlet of the refrigerator breaking mechanism; when it is detected that the gas concentration of the first waste gas is greater than a first preset concentration threshold, controlling to increase the air volume of the air inlet of the refrigerator breaking mechanism. When it is detected that the gas concentration of the first exhaust gas is less than a second preset concentration threshold, the air volume of the air inlet of the refrigerator crushing mechanism is controlled to be reduced; The first preset concentration threshold is greater than the second preset concentration threshold.

10. The refrigerator recycling processing method of claim 8, characterized by, The method further comprises: sorting the solid mixture remaining after the air separation treatment, except for the foam, to obtain metal and plastic objects.

11. An electronic device, comprising: Comprise: At least one processor; And, The memory is in communication connection with the at least one processor; wherein The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the refrigerator recycling processing method of any one of claims 8 to 10.

12. A computer readable storage medium storing a computer program, wherein the computer program comprises program instructions configured to cause a processor to perform the method according to any one of claims 1 to 11. The computer program is executed by the processor to implement the refrigerator recycling processing method of any one of claims 8 to 10.

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