Recovery system

Abstract

The application provides a recovery system, comprising: a conveying unit, a heat exchange unit, a refrigeration unit and a recovery unit; the conveying unit is connected with the heat exchange unit and the refrigeration unit respectively, and is used for conveying a to-be-treated medium to the heat exchange unit and the refrigeration unit; the heat exchange unit is connected with the refrigeration unit and the recovery unit respectively; wherein the to-be-treated medium enters the heat exchange unit to realize gas-liquid separation through heat exchange, the separated liquid to-be-recovered medium flows into the recovery unit, and the separated to-be-treated medium flows into the refrigeration unit; the refrigeration unit utilizes the heat energy generated by burning part of the to-be-treated medium conveyed by the conveying unit to prepare cold energy, condenses the to-be-treated medium, and after gas-liquid separation, the separated liquid to-be-recovered medium flows into the recovery unit. The application drives the refrigerator to provide a low-temperature environment by utilizing the high-temperature heat energy generated by burning part of the to-be-treated medium, so as to realize liquefaction of the remaining to-be-treated medium, and meet the recovery demand of the to-be-recovered medium in the to-be-treated medium.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of energy technology, in particular to a recovery system. BACKGROUND

[0002] Volatile organic compounds (VOCs) are important precursors of ozone and PM2.5, and their emission control directly affects the ecological environment, human health and economic development. Therefore, it is necessary to take measures to reduce the emission of VOCs.

[0003] The existing end-of-pipe treatment technology for VOCs mainly includes destruction technology and recovery technology. The former mainly includes thermal oxidation, catalytic oxidation, etc.; the latter mainly includes absorption, adsorption, membrane separation and condensation. For waste gas components with high value, using destruction technology will cause resource waste and economic loss; absorption, adsorption and membrane separation recovery technology will produce secondary pollution and high cost; the refrigeration temperature of the traditional condensation method is usually-80℃, which is difficult to meet the existing emission concentration limit standard, and reaching a lower temperature requires designing a multi-stage cascade form, resulting in a complex system structure. SUMMARY

[0004] The present application provides a recovery system to solve the defects that the existing end-of-pipe treatment technology for VOCs is difficult to meet the existing emission concentration limit standard, and reaching a lower temperature requires designing a multi-stage cascade form, resulting in a complex system structure. By using the high-temperature heat energy generated by burning part of the to-be-treated medium to drive a refrigerator to provide a low-temperature environment, the liquefaction of the remaining to-be-treated medium is realized, the recovery demand for the to-be-recovered medium in the to-be-treated medium is met, and the consumption of additional power is avoided, which has economic, environmental and social benefits.

[0005] According to the present application, a recovery system is provided, which comprises a conveying unit, a heat exchange unit, a refrigeration unit and a recovery unit.

[0006] The conveying unit is connected with the heat exchange unit and the refrigeration unit respectively, and is used for conveying to-be-treated medium to the heat exchange unit and the refrigeration unit.

[0007] The heat exchange unit is connected with the refrigeration unit and the recovery unit respectively.

[0008] The to-be-treated medium enters the heat exchange unit for heat exchange to realize gas-liquid separation, the separated liquid to-be-recovered medium flows into the recovery unit, and the separated to-be-treated medium flows into the refrigeration unit.

[0009] The refrigeration unit uses the heat energy generated by burning part of the to-be-treated medium conveyed by the conveying unit to prepare cold energy, condenses the to-be-treated medium, and after gas-liquid separation, the separated liquid to-be-recovered medium flows into the recovery unit.

[0010] It should be noted that by providing the VOCs with high value can be effectively recovered, economic benefits, environmental benefits and social benefits.

[0011] According to an embodiment of the present application, the heat exchange unit comprises: a first heat exchanger, a second heat exchanger and a first gas-liquid separator;

[0012] The recovery unit comprises a condensate tank;

[0013] The conveying unit is connected with the inlet end of the first heat exchanger and the inlet end of the refrigeration unit, respectively;

[0014] The outlet end of the first heat exchanger is connected with the inlet end of the first gas-liquid separator;

[0015] The outlet end of the first gas-liquid separator is connected with the second heat exchanger and the condensate tank, respectively;

[0016] The refrigeration unit is connected with the second heat exchanger;

[0017] The outlet end of the second heat exchanger is connected with the condensate tank;

[0018] Wherein, the heat exchange of the first heat exchanger is carried out after the heat exchange of the first heat exchanger, and the liquid separated from the first gas-liquid separator flows into the condensate tank, and the separated liquid flows into the second heat exchanger;

[0019] The heat exchange of the first heat exchanger is carried out after the heat exchange of the first heat exchanger, and the liquid separated from the first gas-liquid separator flows into the condensate tank, and the separated liquid flows into the second heat exchanger;

[0020] Specifically, the embodiment provides a heat exchange unit and a recovery unit, which comprises a first heat exchanger, a second heat exchanger, a first gas-liquid separator and a condensate tank, and realizes the recovery of the recovered medium.

[0021] According to an embodiment of the present application, the refrigeration unit comprises: a combustion chamber, a hot end and a cold end;

[0022] The combustion chamber, the hot end and the cold end are sequentially connected;

[0023] Wherein, the combustion chamber is connected with the conveying unit;

[0024] The cold end is connected with the second heat exchanger.

[0025] Specifically, the embodiment provides an implementation of a refrigeration unit, by arranging a combustion chamber, partial to-be-processed medium is combusted in the combustion chamber, high-temperature heat energy generated by the combustion is transferred to a hot end, heat energy of the hot end drives a cold end to perform refrigeration, and cold energy of the cold end is exchanged with to-be-processed medium flowing through a second heat exchanger, so that the to-be-processed medium flowing through is condensed and liquefied.

[0026] According to an implementation of the present application, the heat exchange unit further comprises a second gas-liquid separator.

[0027] The inlet end of the second gas-liquid separator is connected with the outlet end of the second heat exchanger, and the outlet end of the second gas-liquid separator is connected with the condensed liquid storage tank.

[0028] After the to-be-processed medium exchanges heat with the cold energy in the second heat exchanger, the to-be-processed medium enters the second gas-liquid separator to perform gas-liquid separation, and separated liquid to-be-recovered medium flows into the condensed liquid storage tank.

[0029] Specifically, the embodiment provides an implementation of a heat exchange unit, by arranging a second gas-liquid separator, to-be-processed medium condensed by low temperature in the second heat exchanger is separated into gas and liquid, and separated to-be-recovered medium flows into the condensed liquid storage tank by gravity.

[0030] According to an implementation of the present application, the outlet end of the second gas-liquid separator is connected with the inlet end of the first heat exchanger.

[0031] After the to-be-processed medium in the second gas-liquid separator is separated into gas and liquid, the to-be-processed medium enters the first heat exchanger and exchanges heat with to-be-processed medium from the conveying unit.

[0032] Specifically, the embodiment provides an implementation of a second gas-liquid separator, to-be-processed medium after passing through the second gas-liquid separator still carries a certain degree of cold energy, by introducing the to-be-processed medium separated by the second gas-liquid separator into the first heat exchanger, the cold energy is reused, and the system efficiency is improved.

[0033] According to an implementation of the present application, further comprising a first valve body, the first valve body is arranged on a pipeline connecting the first heat exchanger and the refrigeration unit.

[0034] After the to-be-processed medium separated into gas and liquid exchanges heat with to-be-processed medium flowing through in the first heat exchanger, the to-be-processed medium is returned to the refrigeration unit by adjustment of the first valve body, so as to prepare the cold energy for the refrigeration unit to supply energy.

[0035] Specifically, the embodiment provides an implementation of the first valve body, by arranging the first valve body, the heat-exchanged to-be-treated medium in the first heat exchanger is transported into the combustion chamber of the refrigeration unit, and then energy supply for refrigeration of the refrigeration unit is realized.

[0036] According to an implementation of the present application, the second valve body is arranged on a pipeline connecting the first heat exchanger and the external environment.

[0037] The to-be-treated medium after gas-liquid separation is heat-exchanged with the to-be-treated medium flowing through the first heat exchanger, and then is discharged to the external environment through the adjustment of the second valve body.

[0038] Specifically, the embodiment provides an implementation of the second valve body, by arranging the second valve body, the heat-exchanged and purified to-be-treated medium in the first heat exchanger is discharged to the atmosphere.

[0039] According to an implementation of the present application, the recovery unit further comprises a third valve body and a liquid discharge pump.

[0040] The liquid discharge pump and the third valve body are arranged in series on a pipeline connecting the condensate storage tank and the refrigeration unit.

[0041] The liquid to-be-recovered medium stored in the condensate storage tank is transported to the refrigeration unit through the liquid discharge pump and the third valve body, so as to provide cold energy for the refrigeration unit.

[0042] Specifically, the embodiment provides an implementation of the recovery unit, by arranging the liquid discharge pump, part of the to-be-recovered medium in the condensate storage tank is transported to the refrigeration unit, then provides cold energy for the refrigeration unit after combustion, cools the condensed to-be-treated medium, and realizes zero emission of the to-be-treated medium.

[0043] It should be noted that the purified gas meeting the emission concentration requirement is used for diluting the to-be-treated medium of the incoming flow, and is jointly introduced into the combustion chamber for combustion, so as to realize zero emission of VOCs in the recovery process.

[0044] According to an implementation of the present application, the transport unit comprises a fourth valve body and a fifth valve body.

[0045] The fourth valve body is arranged on a pipeline transporting the to-be-treated medium to the heat exchange unit.

[0046] The fifth valve body is arranged on a pipeline transporting the to-be-treated medium to the refrigeration unit.

[0047] The fourth valve body and the fifth valve body realize the adjustment of the flow of the to-be-treated medium delivered to the heat exchange unit and the refrigeration unit.

[0048] Specifically, the embodiment provides an implementation of a delivery unit, which realizes the adjustment of the flow of the to-be-treated medium delivered by the delivery unit by arranging the fourth valve body and the fifth valve body, so that the flow of the to-be-treated medium entering the combustion chamber matches the flow of the to-be-treated condensed recovered to-be-treated medium.

[0049] According to an implementation of the present application, the delivery unit further comprises: an air blower, which delivers the to-be-treated medium to the heat exchange unit and the refrigeration unit respectively.

[0050] Specifically, the embodiment provides another implementation of a delivery unit, which enables the to-be-treated medium to be delivered to the heat exchange unit and the refrigeration unit under the action of the air blower by arranging the air blower.

[0051] The above one or more technical solutions in the present application have at least one of the following technical effects: the present application provides a recovery system, which drives the refrigerator to provide a low-temperature environment by burning the to-be-treated medium as high-temperature heat energy, so as to realize the liquefaction of the remaining to-be-treated medium, meet the recovery demand of the to-be-recovered medium in the to-be-treated medium, and avoid the consumption of additional electric power, thereby having economic benefits, environmental protection benefits and social benefits.

[0052] Additional aspects and advantages of the present application will be made apparent by the following description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0053] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

[0054] Figure 1 It is a schematic diagram of the arrangement relationship of the recovery system provided by the present application.

[0055] Reference signs:

[0056] 10, first heat exchanger; 11, second heat exchanger; 20, first gas-liquid separator; 21, second gas-liquid separator; 30, condensed liquid storage tank; 40, combustion chamber; 41, hot end; 42, cold end; 50, first valve body; 60, second valve body; 70, third valve body; 80, liquid discharge pump; 90, fourth valve body; 100, fifth valve body; 110, air blower. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0059] In some specific embodiments of the present invention, such as Figure 1 As shown, this solution provides a recovery system, including: a conveying unit, a heat exchange unit, a refrigeration unit, and a recovery unit; the conveying unit is connected to the heat exchange unit and the refrigeration unit respectively, and is used to convey the medium to be processed to the heat exchange unit and the refrigeration unit respectively; the heat exchange unit is connected to the refrigeration unit and the recovery unit respectively; wherein, the medium to be processed enters the heat exchange unit for heat exchange to achieve gas-liquid separation, the separated liquid medium to be recovered flows into the recovery unit, and the separated medium to be processed flows into the refrigeration unit; the refrigeration unit uses the heat energy generated by burning part of the medium to be processed conveyed by the conveying unit to generate cold energy, cools and condenses the medium to be processed, and after gas-liquid separation, the separated liquid medium to be recovered flows into the recovery unit.

[0060] In detail, this invention provides a recycling system to address the shortcomings of existing VOCs end-of-pipe treatment technologies, which are unable to meet current emission concentration limits and require multi-stage cascade designs to achieve lower temperatures, resulting in complex system structures. By utilizing the high-temperature heat energy generated from the combustion of part of the medium to be treated to drive a chiller to provide a low-temperature environment, the remaining medium to be treated is liquefied, thereby achieving the recovery of the recyclable medium within the remaining medium. This avoids consuming additional electricity and has economic, environmental, and social benefits.

[0061] It should be noted that by providing a means to effectively recycle high-value VOCs, there are economic, environmental, and social benefits.

[0062] In a possible implementation, the medium to be treated is waste gas.

[0063] In a possible implementation, the medium to be treated is high-value industrial waste gas containing VOCs.

[0064] In a possible implementation, the present invention is applied to the industrial field of high-temperature waste heat.

[0065] In possible implementations, the industrial sectors utilizing high-temperature waste heat include at least industrial coating, biopharmaceuticals, petrochemicals, and refrigeration.

[0066] In a possible implementation, the present invention is applied to the field of VOCs end-of-pipe treatment.

[0067] In a possible implementation, the medium to be recycled is liquid VOCs.

[0068] In possible implementations, the thermally driven low-temperature condensation process for VOCs recovery provided by the present invention can be applied to petrochemical, biopharmaceutical, and industrial coating factories and enterprises, and even to remote areas with insufficient power supply and ocean-going cruise ships.

[0069] In possible implementations, the thermally driven cryogenic condensation process for VOCs recovery provided by the present invention can also be applied to fields where some gaseous fuels can be consumed to recover residual gases, such as associated gas from oil fields.

[0070] In some possible embodiments of the present invention, the heat exchange unit includes: a first heat exchanger 10, a second heat exchanger 11, and a first gas-liquid separator 20.

[0071] The recovery unit includes: condensate storage tank 30.

[0072] The conveying unit is connected to the inlet end of the first heat exchanger 10 and the inlet end of the refrigeration unit, respectively.

[0073] The outlet end of the first heat exchanger 10 is connected to the inlet end of the first gas-liquid separator 20.

[0074] The outlet of the first gas-liquid separator 20 is connected to the second heat exchanger 11 and the condensate storage tank 30, respectively.

[0075] The refrigeration unit is connected to the second heat exchanger 11.

[0076] The outlet end of the second heat exchanger 11 is connected to the condensate storage tank 30.

[0077] The medium to be processed enters the first heat exchanger 10 for heat exchange, and then enters the first gas-liquid separator 20 for gas-liquid separation. The separated liquid medium to be recovered flows into the condensate storage tank 30, and the separated medium to be processed flows into the second heat exchanger 11.

[0078] The medium to be processed enters the refrigeration unit to generate cold energy. The cold energy exchanges heat with the medium to be processed in the second heat exchanger 11. The condensed medium to be recovered flows into the recovery unit.

[0079] Specifically, this embodiment provides an implementation of a heat exchange unit and a recovery unit. By setting up a first heat exchanger 10, a second heat exchanger 11, a first gas-liquid separator 20 and a condensate storage tank 30, the recovery of the medium to be processed is achieved.

[0080] In a possible implementation, the medium to be processed is heat-exchanged by the first heat exchanger 10 and then enters the first gas-liquid separator 20 for gas-liquid separation. The medium to be recovered flows into the condensate storage tank 30 by its own weight.

[0081] In a possible implementation, the conveying unit delivers the medium to be processed to the refrigeration unit through another channel, so as to provide power for the refrigeration unit to generate cooling capacity using the medium to be processed. After the refrigeration unit provides cooling capacity, it is delivered to the second heat exchanger 11. The gas separation medium separated in the first gas-liquid separator 20 enters the second heat exchanger 11. After the gas separation medium exchanges heat with the cooling capacity, it is separated into gas and liquid again. The liquid medium to be processed flows into the condensate storage tank 30.

[0082] In a possible implementation, the medium to be recovered obtained by condensation in the condensate storage tank 30 is transported to the plant area for reprocessing or to the combustion chamber 40 for use as fuel via a cryogenic discharge pump 80.

[0083] In a possible implementation, the first heat exchanger 10 is a shell-and-tube heat exchanger.

[0084] In a possible implementation, the second heat exchanger 11 is a gas-solid heat exchanger.

[0085] In a possible implementation, the second heat exchanger 11 is a heat exchanger with an intermediate refrigerant heat exchange.

[0086] In a possible implementation, the condensate storage tank 30 is a horizontal storage tank.

[0087] In some possible embodiments of the present invention, the refrigeration unit includes a combustion chamber 40, a hot end 41, and a cold end 42.

[0088] Combustion chamber 40, hot end 41 and cold end 42 are connected in sequence.

[0089] The combustion chamber 40 is connected to the conveying unit.

[0090] The cold end 42 is connected to the second heat exchanger 11.

[0091] Specifically, this embodiment provides an implementation of a refrigeration unit. By setting up a combustion chamber 40, a portion of the medium to be processed is burned in the combustion chamber 40. The high-temperature heat energy generated by the combustion is transferred to the hot end 41, and the heat energy of the hot end 41 drives the cold end 42 to refrigerate. The cooling capacity of the cold end 42 is exchanged with the medium to be processed through the second heat exchanger 11, thereby condensing and liquefying the medium to be processed.

[0092] In a possible implementation, to avoid additional power consumption, the refrigeration unit includes a refrigerant that drives the refrigeration unit by burning the high-temperature heat energy of the medium to be processed.

[0093] In a possible implementation, helium is used as the refrigerant. It should be noted that the existing mechanical condensation recovery technology has a high refrigeration temperature, which is difficult to meet the increasingly stringent VOCs emission requirements. In order to obtain a lower refrigeration temperature, a multi-stage cascade structure needs to be designed. In addition, the refrigerant used in the system is Freon, which has the characteristics of being flammable, explosive and having a greenhouse effect.

[0094] In a possible implementation, the refrigeration unit is a thermoacoustic refrigeration machine that uses a natural working fluid, which can avoid the greenhouse effect caused by Freon series refrigerants.

[0095] In a possible implementation, the temperature of the hot end 41 within the cooling unit is maintained between 400°C and 600°C.

[0096] In a possible implementation, the cooling temperature of the cold end 42 within the cooling unit is matched and controlled according to the composition of the medium to be processed.

[0097] In a possible implementation, the combustion chamber 40 within the refrigeration unit is a regenerative combustion furnace.

[0098] In a possible implementation, the concentration of the medium to be treated entering the combustion chamber 40 needs to be diluted to below the explosive limit concentration of the components, wherein the purified gas passing through the second heat exchanger 11 can be used to dilute the incoming medium to be treated after recovering the cold energy.

[0099] In a possible implementation, the control of the outlet emission concentration can be achieved by setting the appropriate cooling temperature according to the components to meet the emission concentration limits.

[0100] In some possible embodiments of the present invention, the heat exchange unit further includes a second gas-liquid separator 21.

[0101] The inlet end of the second gas-liquid separator 21 is connected to the outlet end of the second heat exchanger 11, and the outlet end of the second gas-liquid separator 21 is connected to the condensate storage tank 30.

[0102] The medium to be processed exchanges heat with the cold energy in the second heat exchanger 11 and then enters the second gas-liquid separator 21 for gas-liquid separation. The separated liquid medium to be recovered flows into the condensate storage tank 30.

[0103] Specifically, this embodiment provides an implementation of a heat exchange unit. By setting a second gas-liquid separator 21, gas-liquid separation is achieved on the medium to be processed after being condensed at low temperature in the second heat exchanger 11. The separated medium to be recovered flows into the condensate storage tank 30 by its own weight.

[0104] In a possible implementation, the medium to be processed is VOCs.

[0105] In a possible implementation, the medium to be recycled is liquid VOCs.

[0106] In some possible embodiments of the present invention, the outlet end of the second gas-liquid separator 21 is connected to the inlet end of the first heat exchanger 10.

[0107] The medium to be processed after gas-liquid separation in the second gas-liquid separator 21 enters the first heat exchanger 10 and exchanges heat with the medium to be processed flowing from the conveying unit.

[0108] Specifically, this embodiment provides an implementation of a second gas-liquid separator 21. The medium to be processed after passing through the second gas-liquid separator 21 still carries a certain amount of cold energy. By introducing the medium to be processed separated by the second gas-liquid separator 21 into the first heat exchanger 10, the cold energy is reused, thereby improving the system efficiency.

[0109] In some possible embodiments of the present invention, it further includes: a first valve body 50, which is disposed on a pipeline connecting the first heat exchanger 10 and the refrigeration unit.

[0110] In this process, the gas-liquid separated medium exchanges heat with the flowing medium in the first heat exchanger 10, and then flows back to the refrigeration unit through the regulation of the first valve body 50, so as to generate cooling capacity for the refrigeration unit.

[0111] Specifically, this embodiment provides an implementation of a first valve body 50. By setting the first valve body 50, the medium to be processed after heat exchange in the first heat exchanger 10 is transported to the combustion chamber 40 of the refrigeration unit, thereby realizing the energy supply for refrigeration of the refrigeration unit.

[0112] In a possible implementation, the first valve body 50 is a flow regulating valve, which can regulate the flow rate between the first heat exchanger 10 and the refrigeration unit.

[0113] In a possible implementation, the first valve body 50 includes at least three adjustment positions, wherein the flow rate of the medium to be processed is 0 for the first adjustment position, the flow rate of the medium to be processed is maximum for the second adjustment position, and the flow rate of the medium to be processed is between 0 and the maximum value for the third adjustment position.

[0114] In some possible embodiments of the present invention, a second valve body 60 is further included, which is disposed on a pipeline connecting the first heat exchanger 10 to the external environment.

[0115] In this process, the gas-liquid separated medium exchanges heat with the flowing medium in the first heat exchanger 10, and is then discharged to the external environment through the regulation of the second valve body 60.

[0116] Specifically, this embodiment provides an implementation of a second valve body 60. By setting the second valve body 60, the purified medium to be treated after heat exchange in the first heat exchanger 10 is discharged into the atmosphere.

[0117] In a possible implementation, the second valve body 60 is a flow regulating valve, which can regulate the flow rate between the second heat exchanger 11 and the external environment.

[0118] In a possible implementation, the second valve body 60 includes at least three adjustment positions, wherein the first adjustment position corresponds to a flow rate of 0 for the medium to be processed, the second adjustment position corresponds to a flow rate of the maximum for the medium to be processed, and the third adjustment position corresponds to a flow rate of the medium to be processed that is between 0 and the maximum value.

[0119] In some possible embodiments of the present invention, the recovery unit further includes a third valve body 70 and a drain pump 80.

[0120] The drain pump 80 and the third valve body 70 are connected in series on the pipeline connecting the condensate storage tank 30 and the refrigeration unit.

[0121] The liquid medium to be recovered stored in the condensate storage tank 30 is transported to the refrigeration unit through the drain pump 80 and the third valve body 70 to provide cooling capacity to the refrigeration unit.

[0122] Specifically, this embodiment provides an implementation method for a recycling unit. The setting of the drain pump 80 enables the transportation of part of the medium to be recycled in the condensate storage tank 30 to the refrigeration unit, which then provides cooling capacity to the refrigeration unit after combustion, thereby cooling and condensing the medium to be treated and achieving zero discharge of the medium to be treated.

[0123] It should be noted that after recovering the cold energy, the purified gas that meets the emission concentration requirements is used to dilute the incoming medium to be treated, and then they enter the combustion chamber 40 together for combustion, which can achieve zero VOCs emissions in the recovery process.

[0124] In a possible implementation, the third valve body 70 is a flow regulating valve, which can regulate the flow rate between the condensate storage tank 30 and the refrigeration unit.

[0125] In a possible implementation, the third valve body 70 includes at least three adjustment positions, wherein the first adjustment position corresponds to a flow rate of 0 for the medium to be processed, the second adjustment position corresponds to a flow rate of the maximum for the medium to be processed, and the third adjustment position corresponds to a flow rate of the medium to be processed that is between 0 and the maximum value.

[0126] In a possible implementation, the liquid VOCs collected by the condensate collection tank 10 can be controlled and regulated by the third valve body 70 to enter the combustion chamber 40 according to the fuel requirements of the combustion chamber 40, so as to supply energy to the combustion chamber 40.

[0127] In one possible implementation, the liquid VOCs collected in the condensate storage tank 30 are transported to the plant area by the drain pump 80 for reprocessing.

[0128] In some possible embodiments of the present invention, the conveying unit includes a fourth valve body 90 and a fifth valve body 100.

[0129] The fourth valve body 90 is installed on the pipeline that supplies the medium to be processed to the heat exchange unit.

[0130] The fifth valve body 100 is installed on the pipeline that supplies the medium to be processed to the refrigeration unit.

[0131] The fourth valve body 90 and the fifth valve body 100 regulate the flow rate of the medium to be processed delivered to the heat exchange unit and the refrigeration unit.

[0132] Specifically, this embodiment provides an implementation method for a conveying unit. By setting a fourth valve body 90 and a fifth valve body 100, the flow rate of the medium to be processed conveyed by the conveying unit is adjusted so that the flow rate of the medium to be processed entering the combustion chamber 40 matches the flow rate of the medium to be processed for condensation recovery.

[0133] In a possible implementation, the fourth valve body 90 and the fifth valve body 100 are flow regulating valves, which can regulate the flow rate of the medium to be processed entering the first heat exchanger 10 and the refrigeration unit, respectively.

[0134] In a possible implementation, both the fourth valve body 90 and the fifth valve body 100 include at least three adjustment positions, wherein the first adjustment position corresponds to a flow rate of 0 for the medium to be processed, the second adjustment position corresponds to a flow rate of the maximum for the medium to be processed, and the third adjustment position corresponds to a flow rate of the medium to be processed that is between 0 and the maximum value.

[0135] In some possible embodiments of the present invention, the conveying unit further includes a blower 110, which conveys the medium to be processed to the heat exchange unit and the refrigeration unit respectively.

[0136] Specifically, this embodiment provides another implementation of the conveying unit. By setting up a blower 110, the medium to be processed can be conveyed to the heat exchange unit and the refrigeration unit under the action of the blower 110.

[0137] In a possible implementation, the medium to be treated is fed into the heat exchange unit for heat exchange under the action of the blower 110.

[0138] In a possible implementation, the medium to be processed is fed into the refrigeration unit for the preparation of cooling capacity under the action of the blower 110.

[0139] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0140] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0141] Finally, it should be noted that the above embodiments are only for illustrating the present invention and not for limiting the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be covered within the scope of the claims of the present invention.

Claims

1. A recycling system, characterized in that, include: Conveying unit, heat exchange unit, refrigeration unit, and recovery unit; The conveying unit is connected to the heat exchange unit and the refrigeration unit respectively, and is used to convey the medium to be processed to the heat exchange unit and the refrigeration unit respectively; the heat exchange unit is connected to the refrigeration unit and the recovery unit respectively; wherein, the medium to be processed enters the heat exchange unit to achieve gas-liquid separation through heat exchange, the separated liquid medium to be recovered flows into the recovery unit, and the separated medium to be processed flows into the refrigeration unit; the refrigeration unit uses the heat energy generated by burning part of the medium to be processed conveyed by the conveying unit to generate cold energy, condenses the medium to be processed, and after gas-liquid separation, the separated liquid medium to be recovered flows into the recovery unit; The heat exchange unit includes a first heat exchanger, a second heat exchanger, and a first gas-liquid separator; the recovery unit includes a condensate storage tank; the conveying unit is connected to the inlet of the first heat exchanger and the inlet of the refrigeration unit; the outlet of the first heat exchanger is connected to the inlet of the first gas-liquid separator; the outlet of the first gas-liquid separator is connected to the second heat exchanger and the condensate storage tank; the refrigeration unit is connected to the second heat exchanger; the outlet of the second heat exchanger is connected to the condensate storage tank; wherein, after the medium to be treated undergoes heat exchange in the first heat exchanger, it enters the first gas-liquid separator for gas-liquid separation, the separated liquid medium to be recovered flows into the condensate storage tank, and the separated medium to be treated flows into the second heat exchanger; the medium to be treated enters the refrigeration unit to generate cooling capacity, the cooling capacity exchanges heat with the medium to be treated in the second heat exchanger, and the condensed medium to be recovered flows into the recovery unit; The refrigeration unit includes a combustion chamber, a hot end, and a cold end; the combustion chamber, the hot end, and the cold end are connected in sequence; wherein, the combustion chamber is connected to the conveying unit; and the cold end is connected to the second heat exchanger. The heat exchange unit further includes: a second gas-liquid separator; the inlet end of the second gas-liquid separator is connected to the outlet end of the second heat exchanger, and the outlet end of the second gas-liquid separator is connected to the condensate storage tank; wherein, after the medium to be treated exchanges heat with the cold energy in the second heat exchanger, it enters the second gas-liquid separator for gas-liquid separation, and the separated liquid medium to be recovered flows into the condensate storage tank.

2. The recycling system according to claim 1, characterized in that, The outlet end of the second gas-liquid separator is connected to the inlet end of the first heat exchanger; The medium to be processed, after being separated into gas and liquid in the second gas-liquid separator, enters the first heat exchanger and exchanges heat with the medium to be processed from the conveying unit.

3. The recycling system according to claim 2, characterized in that, Also includes: A first valve body is disposed on a pipeline connecting the first heat exchanger and the refrigeration unit; In this process, the gas-liquid separated medium exchanges heat with the flowing medium in the first heat exchanger, and then flows back to the refrigeration unit through the adjustment of the first valve body, so as to generate the cooling capacity for the refrigeration unit.

4. A recycling system according to claim 2, characterized in that, Also includes: The second valve body is disposed on the pipeline connecting the first heat exchanger and the external environment; In this process, the gas-liquid separated medium exchanges heat with the flowing medium in the first heat exchanger, and is then discharged to the external environment through the adjustment of the second valve.

5. A recycling system according to any one of claims 1 to 4, characterized in that, The recovery unit also includes: a third valve body and a drain pump; The drain pump and the third valve body are connected in series on the pipeline connecting the condensate storage tank and the refrigeration unit; The liquid medium to be recovered, stored in the condensate storage tank, is transported to the refrigeration unit through the drain pump and the third valve body to provide cooling capacity to the refrigeration unit.

6. A recycling system according to any one of claims 1 to 4, characterized in that, The conveying unit includes: a fourth valve body and a fifth valve body; The fourth valve body is disposed on the pipeline that supplies the medium to be processed to the heat exchange unit; The fifth valve body is disposed on the pipeline that supplies the medium to be processed to the refrigeration unit; The fourth valve body and the fifth valve body regulate the flow rate of the medium to be processed delivered to the heat exchange unit and the refrigeration unit.

7. A recycling system according to claim 6, characterized in that, The conveying unit further includes a blower, which conveys the medium to be processed to the heat exchange unit and the refrigeration unit respectively.

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