Combined cooling system for high-temperature waste gas

Abstract

The invention provides a combined cooling system for high-temperature waste gas, and relates to the technical field of waste gas treatment devices. One side, far away from the primary cooling adsorption device, of the blower device is communicated with a tail gas discharge pipe; the primary cooling adsorption device comprises a box body, four groups of containing cavities penetrating left and right are formed in the two sides of the box body, and the four groups of containing cavities are respectively a water curtain cavity, a low-temperature medium dehumidification cavity, a harmful tail gas adsorption cavity and a steam desorption cavity from front to back along a tail gas circulation path; the one-time cooling adsorption device simultaneously achieves the effects of cooling and harmful tail gas adsorption, meanwhile, heat energy of high-temperature tail gas is ingeniously utilized, high-temperature steam is provided for subsequent harmful gas desorption, and the porous carbon ceramic interlayer plate serves as a cooling mechanism of the high-temperature tail gas and also serves as an adsorption mechanism of the tail gas, so that the adsorption efficiency is improved. Therefore, the integration level of the device is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment devices, and in particular to a high-temperature waste gas combined cooling system. Background Art

[0002] The prior art discloses a system and process flow for treating industrial waste gas, which is disclosed as "CN110280116A". The system and process flow are used for treating industrial waste gas, and include a connected incineration device, a cooling device and a UV light purification device. The incineration device is used for incinerating industrial waste gas at high temperature to decompose a large amount of harmful substances; the cooling device is connected to the incineration device to quickly cool the industrial waste gas after incineration; the UV light purification device decomposes the toxic and odorous substances in the waste gas by UV light, and discharges the waste gas through the exhaust pipe after multi-stage purification treatment, so as to prevent industrial waste gas from polluting the atmosphere and improve environmental protection. The gas is separated by the incinerator to obtain combustible gas and waste gas, and the combustible gas is sent to the incinerator for combustion, so as to achieve the purpose of energy saving and consumption reduction, greatly reduce fuel costs and save costs. In addition, oxygen air holes are arranged around the incinerator to make the waste gas contact with oxygen more fully and burn more completely, thereby improving the incineration rate and waste gas treatment quality.

[0003] However, the above-mentioned device still has obvious defects during use: although the above-mentioned device realizes the corresponding treatment process in sequence, the exhaust gas cooling and treatment effect of the above-mentioned device cannot be guaranteed, and the correlation of the above-mentioned device is not strong, and it is difficult to meet the integration requirements of existing treatment equipment. Summary of the invention

[0004] The object of the present invention is to provide a high-temperature exhaust gas combined cooling system to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A high-temperature exhaust gas combined cooling system for treating industrial exhaust gas, including an exhaust gas combustion release device;

[0007] The front end of the exhaust combustion release device is connected to the secondary adsorption device, the front end of the secondary adsorption device is connected to the UV light purification device, the front end of the UV light purification device is connected to the primary cooling adsorption device, the primary cooling adsorption device is connected to the blast device, and the side of the blast device away from the primary cooling adsorption device is connected to the exhaust emission pipe;

[0008] The primary cooling adsorption device comprises a box body, and four groups of accommodating chambers are provided on both sides of the box body, which are respectively a water curtain chamber, a low-temperature medium dehumidification chamber, a harmful exhaust gas adsorption chamber and a steam desorption chamber from front to back along the exhaust gas flow path. The accommodating chambers are all provided with porous carbon-ceramic interlayer plates in a pluggable manner. The porous carbon-ceramic interlayer plates are located in different accommodating chambers so that they have different functions. During use, the porous carbon-ceramic interlayer plates located on the exhaust gas flow path are regularly plugged in and replaced in the rear accommodating chamber, and the porous carbon-ceramic interlayer plates at the end are replaced in the front accommodating chamber; wherein,

[0009] A water supply device is installed in the box above the porous carbon ceramic interlayer plate in the water curtain chamber. After the high-temperature exhaust gas passes through the water curtain wall formed by the porous carbon ceramic interlayer plate, the temperature drops and the granular impurities in it are intercepted;

[0010] A low-temperature medium release head is arranged in an array in a box body on one side of the porous carbon-ceramic interlayer plate in the low-temperature medium dehumidification chamber. The low-temperature medium release head is connected to an external refrigeration device through a pipeline, and the porous carbon-ceramic interlayer plate is dried by releasing the low-temperature medium onto the porous carbon-ceramic interlayer plate.

[0011] After the porous carbon ceramic interlayer plate in the harmful exhaust gas adsorption chamber is dried at the front end, the exhaust gas can adsorb harmful substances in the gas after passing through the porous carbon ceramic interlayer plate;

[0012] The porous carbon ceramic interlayer plate in the steam desorption chamber adsorbs a large amount of harmful gases after the front-end process. At this time, by releasing high-temperature steam onto the porous carbon ceramic interlayer plate in the steam desorption chamber, the harmful gases adsorbed on the porous carbon ceramic interlayer plate can be desorbed. The porous carbon ceramic interlayer plate after desorption enters the water curtain chamber after the next plug-in cycle; wherein,

[0013] A steam generating chamber is also provided in the box body located at the front end of the water curtain chamber. The water in the steam generating chamber is heated to form steam during the release of high-temperature exhaust gas. The formed high-temperature steam is pumped into the steam desorption chamber through the box body and released onto the porous carbon-ceramic interlayer plate therein, thereby completing the effective desorption of harmful gases.

[0014] Preferably, each of the accommodating cavities and the outside of the box on both sides are provided with an electric pulley block, and the porous carbon-ceramic interlayer plate is slidably matched with the electric pulley block through a slide rail installed at the bottom, and the porous carbon-ceramic interlayer plate is driven to translate and slide through the rotation of the electric pulley block, thereby moving into or out of the accommodating cavity.

[0015] Preferably, a transition pulley block is further provided outside the box body, and the transition pulley block is used to complete the temporary storage of the porous carbon-ceramic interlayer plate during the plug-in and replacement process.

[0016] Preferably, translation rails perpendicular to the sliding direction of the porous carbon-ceramic interlayer plate are laid on both sides of the box body, and exchange seats are provided on the translation rails in a translationally sliding manner. The exchange seats are used to receive the porous carbon-ceramic interlayer plate moved out of the accommodating cavity and transfer the porous carbon-ceramic interlayer plate to one side of the subsequent accommodating cavity.

[0017] Preferably, a steam outflow hole and a steam inflow hole are provided on the box body, the steam outflow hole and the steam inflow hole are connected through a pipeline, a circulation pump is installed on the pipeline, and a desorption nozzle connected to the steam inflow hole is installed in the steam desorption chamber.

[0018] Preferably, the box body is further provided with a water injection hole connected to the steam generation chamber and the water curtain chamber, and the water injection hole is connected to an external water injection pipeline.

[0019] Preferably, the box body is further provided with a low-temperature medium pump injection hole above the low-temperature medium dehumidification chamber, and the low-temperature medium pump injection hole is connected to an external refrigeration device.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The one-step cooling adsorption device of the present invention achieves the effects of cooling and adsorbing harmful exhaust gas at the same time, and cleverly utilizes the thermal energy of high-temperature exhaust gas, thereby providing high-temperature steam for subsequent desorption of harmful gases. The porous carbon-ceramic interlayer plate of the present invention not only serves as a cooling mechanism for high-temperature exhaust gas, but also serves as an adsorption mechanism for exhaust gas, thereby greatly improving the integration of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an overall schematic diagram of the device of the present invention;

[0023] Figure 2 It is a schematic diagram of the overall structure of the one-step cooling adsorption device of the present invention;

[0024] Figure 3 It is a cross-sectional schematic diagram of a top view of a primary cooling adsorption device of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the porous carbon ceramic interlayer plate of the present invention;

[0026] Figure 5 It is a schematic diagram of the installation structure of the porous carbon ceramic interlayer board of the present invention;

[0027] Figure 6 It is a schematic diagram of the replacement process of the porous carbon ceramic interlayer plate of the present invention.

[0028] In the figure: 1 exhaust combustion release device, 2 secondary adsorption device, 3 UV light purification device, 4 primary cooling adsorption device, 5 blast device, 6 exhaust emission pipe, 7 box, 8 accommodating chamber, 9 water curtain chamber, 10 low-temperature medium dehumidification chamber, 11 harmful exhaust adsorption chamber, 12 steam desorption chamber, 13 porous carbon ceramic interlayer plate, 14 low-temperature medium release head, 15 steam generation chamber, 16 electric pulley block, 17 transition pulley block, 18 translation slide rail, 19 exchange seat, 20 steam outflow hole, 21 steam inflow hole, 22 circulation pump, 23 water injection hole, 24 low-temperature medium pump injection hole, 25 desorption nozzle. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-6 , the present invention provides a technical solution:

[0031] Embodiment 1:

[0032] A high-temperature exhaust gas combined cooling system for treating industrial exhaust gas comprises an exhaust gas combustion release device 1;

[0033] The front end of the exhaust combustion release device 1 is connected to the secondary adsorption device 2, the front end of the secondary adsorption device 2 is connected to the UV light purification device 3, the front end of the UV light purification device 3 is connected to the primary cooling adsorption device 4, the primary cooling adsorption device 4 is connected to the blast device 5, and the blast device 5 is connected to the exhaust gas discharge pipe 6 at the side away from the primary cooling adsorption device 4;

[0034] The primary cooling adsorption device 4 includes a box body 7, and four groups of accommodating chambers 8 are provided on both sides of the box body 7, which are respectively a water curtain chamber 9, a low-temperature medium dehumidification chamber 10, a harmful exhaust gas adsorption chamber 11 and a steam desorption chamber 12 along the exhaust gas flow path from front to back. The accommodating chambers 8 are all pluggable and equipped with porous carbon-ceramic interlayer plates 13. The porous carbon-ceramic interlayer plates 13 are located in different accommodating chambers 8 so that they have different functions. During use, the porous carbon-ceramic interlayer plates 13 located on the exhaust gas flow path are regularly plugged in and replaced in the rear accommodating chamber 8, and the porous carbon-ceramic interlayer plates 13 at the end are replaced in the front accommodating chamber 8; wherein,

[0035] A water replenishing device is provided in the box 7 located above the porous carbon ceramic interlayer plate 13 in the water curtain chamber 9. The water in the external water reservoir is circulated to the upper layer of the porous carbon ceramic interlayer plate 13 in the water curtain chamber 9 through the water replenishing device. The water flows down along the gap in the porous carbon ceramic interlayer plate 13 to form a water curtain wall. After the high-temperature exhaust gas passes through the water curtain wall formed by the porous carbon ceramic interlayer plate 13, the temperature drops and the granular impurities therein are intercepted.

[0036] A low-temperature medium release head 14 is arranged in an array in the box body on one side of the porous carbon-ceramic interlayer plate 13 in the low-temperature medium dehumidification chamber 10. The low-temperature medium release head 14 is connected to an external refrigeration device through a pipeline. Since the porous carbon-ceramic interlayer plate 13 in the low-temperature medium dehumidification chamber 10 is replaced from the water curtain chamber 9, the porous carbon-ceramic interlayer plate 13 contains a large amount of moisture. The porous carbon-ceramic interlayer plate 13 is dried by releasing the low-temperature medium onto the porous carbon-ceramic interlayer plate 13. In this process, the exhaust gas passing through the water curtain wall can also be cooled and dehumidified.

[0037] After the front end of the porous carbon ceramic interlayer plate 13 in the harmful exhaust gas adsorption chamber 11 is dried, the exhaust gas can adsorb harmful substances in the gas after passing through the porous carbon ceramic interlayer plate 13;

[0038] The porous carbon ceramic interlayer plate 13 in the steam desorption chamber 12 adsorbs a large amount of harmful gases after the front-end process. At this time, by releasing high-temperature steam onto the porous carbon ceramic interlayer plate 13 in the steam desorption chamber 12, the harmful gases adsorbed on the porous carbon ceramic interlayer plate 13 can be desorbed. The porous carbon ceramic interlayer plate 13 after desorption enters the water curtain chamber 9 after the next plug-in cycle; wherein,

[0039] A steam generating chamber 15 is also provided in the box body 7 located at the front end of the water curtain chamber 9. The water in the steam generating chamber 15 is heated to form steam during the release of the high-temperature exhaust gas. The formed high-temperature steam is pumped into the steam desorption chamber 12 through the box body 7 and released onto the porous carbon-ceramic interlayer plate 13 therein, thereby completing the effective desorption of harmful gases.

[0040] In this embodiment, the high-temperature exhaust gas combined cooling system has multiple exhaust gas treatment units, including a blast device 5, a primary cooling adsorption device 4, a UV light purification device 3, a secondary adsorption device 2 and an exhaust gas combustion release device 1, wherein the blast device 5, the UV light purification device 3, the secondary adsorption device 2 and the exhaust gas combustion release device 1 are all selected from mature technical solutions in the prior art. Since their technical solutions have been widely disclosed in the prior art, they will not be repeated here. Different from the prior art, the primary cooling adsorption device 4 in this embodiment is specially designed, which includes a box body 7, and four groups of accommodating chambers 8 are opened on both sides of the box body 7 and penetrate left and right. The four groups of accommodating chambers 8 are respectively arranged from front to back along the flow path of the exhaust gas. It is a water curtain chamber 9, a low-temperature medium dehumidification chamber 10, a harmful exhaust gas adsorption chamber 11 and a steam desorption chamber 12, and a porous carbon-ceramic interlayer plate 13 is inserted in each accommodating chamber 8. The multiple porous carbon-ceramic interlayer plates 13 are all the same components, which are composed of a carbon-ceramic main body, and the surface forms pores for the flow of water. Therefore, a water replenishment device is provided in the box above the porous carbon-ceramic interlayer plate 13 in the water curtain chamber 9. The water in the external water tank is circulated by the water replenishment device. The water flows down along the gap in the porous carbon-ceramic interlayer plate 13 to form a water curtain wall. After passing through the water curtain wall formed by the porous carbon-ceramic interlayer plate 13, the temperature of the high-temperature exhaust gas drops and the granular impurities therein are intercepted. A low-temperature medium release head 14 is arranged in an array in the box body on one side of the porous carbon-ceramic interlayer plate 13 in the low-temperature medium dehumidification chamber 10, and the low-temperature medium is released to the porous carbon-ceramic interlayer plate 13 to dry the porous carbon-ceramic interlayer plate 13. Similarly, the porous carbon-ceramic interlayer plate 13 in the harmful exhaust gas adsorption chamber 11 realizes the adsorption of exhaust gas, and the porous carbon-ceramic interlayer plate 13 in the steam desorption chamber 12 realizes the desorption of harmful exhaust gas, and the above-mentioned porous carbon-ceramic interlayer plate 13 is replaced regularly. The replacement order is that the porous carbon-ceramic interlayer plate 13 located on the exhaust gas flow path is plugged in and out of the adjacent accommodating chamber 8 from the front to the rear, and the porous carbon-ceramic interlayer plate 13 at the end is inserted into the accommodating chamber 8 at the front end. 8 is replaced, so that the porous carbon ceramic interlayer plates 13 in each accommodating cavity 8 can fully play their role. In summary, the porous carbon ceramic interlayer plates 13 of the present invention realize multiple functions of water curtain and tail gas adsorption and tail gas desorption, and the high-temperature steam required in the tail gas desorption process is generated by the heat transfer process of the high-temperature tail gas. Since the tail gas treated in this embodiment is the tail gas of the continuous catalyst regeneration system, the tail gas temperature is as high as 500°C or more, so it is necessary to reduce its temperature so as to treat the impurities and harmful gases in the tail gas accordingly. The high temperature can realize the heating of the water body into steam, so as to be smoothly used in the subsequent desorption step. This method makes full use of the thermal energy in the tail gas and plays a role in energy saving and environmental protection.

[0041] Embodiment 2:

[0042] Electric pulley blocks 16 are laid outside each accommodating cavity 8 and the box bodies 7 on both sides. The porous carbon-ceramic interlayer plate 13 slides with the electric pulley block 16 through a slide rail installed at the bottom. The rotation of the electric pulley block 16 drives the porous carbon-ceramic interlayer plate 13 to slide in translation, thereby moving into or out of the accommodating cavity 8.

[0043] A transition pulley block 17 is also provided outside the box body 7, and the transition pulley block 17 is used to complete the temporary storage of the porous carbon-ceramic interlayer plate 13 during the plugging and unplugging process.

[0044] In this embodiment, an electric pulley block 16 and a transition pulley block 17 are provided to support and transport the porous carbon-ceramic interlayer plate 13. Specifically, an active motor is provided on the electric pulley block 16 and the transition pulley block 17, and the porous carbon-ceramic interlayer plate 13 is pushed to slide in translation through the rotation of the active motor. A slide rail that cooperates with the electric pulley block 16 and the transition pulley block 17 is installed at the bottom of the porous carbon-ceramic interlayer plate 13, and a magnetic guide bar is provided above the porous carbon-ceramic interlayer plate 13, which cooperates with the iron guide bar installed above the porous carbon-ceramic interlayer plate 13 to prevent the porous carbon-ceramic interlayer plate 13 from tipping over during the translation and sliding process. The transition pulley block 17 is used to temporarily place the porous carbon-ceramic interlayer plate 13, so that the porous carbon-ceramic interlayer plates 13 in each accommodating cavity 8 can be smoothly replaced.

[0045] Embodiment three:

[0046] Both sides of the box body 7 are also provided with translation rails 18 perpendicular to the sliding direction of the porous carbon-ceramic interlayer plate 13, and the translation rails 18 are provided with exchange seats 19 in a translationally sliding manner. The exchange seats 19 are used to receive the porous carbon-ceramic interlayer plate 13 moved out of the accommodating chamber 8 and transfer the porous carbon-ceramic interlayer plate 13 to the side of the subsequent accommodating chamber 8.

[0047] In this embodiment, the exchange seat 19 is used to receive the porous carbon-ceramic interlayer plate 13, and make it cooperate with the accommodating cavity 8 to be inserted through translational sliding, so as to ensure the accuracy of the porous carbon-ceramic interlayer plate 13 during the insertion process. After the porous carbon-ceramic interlayer plate 13 is inserted, its two ends block the two sides of the accommodating cavity 8, so that the box body 7 is closed inside and outside, thereby ensuring the normal progress of the work process.

[0048] Embodiment 4:

[0049] The box body 7 is also provided with a steam outflow hole 20 and a steam inflow hole 21, which are connected by a pipeline, and a circulation pump 22 is also installed on the pipeline. The steam desorption chamber 12 is also provided with a desorption nozzle 25 connected with the steam inflow hole 21.

[0050] The box body 7 is also provided with a water injection hole 23 which is in communication with the steam generation chamber 15 and the water curtain chamber 9, and the water injection hole 23 is in communication with an external water injection pipeline.

[0051] The box body 7 is located above the low-temperature medium dehumidification chamber 10 and is also provided with a low-temperature medium pump injection hole 24, and the low-temperature medium pump injection hole 24 is connected to an external refrigeration device.

[0052] In this embodiment, the flow holes opened on the box body 7 are further disclosed, so as to realize the normal pumping of water, the normal transportation of steam and low-temperature medium, thereby ensuring that each accommodating cavity 8 inside the box body 7 can work normally.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-temperature exhaust gas combined cooling system for treating industrial exhaust gas, including an exhaust gas combustion release device, characterized in that: The front end of the exhaust combustion release device is connected to the secondary adsorption device, the front end of the secondary adsorption device is connected to the UV light purification device, the front end of the UV light purification device is connected to the primary cooling adsorption device, the primary cooling adsorption device is connected to the blast device, and the side of the blast device away from the primary cooling adsorption device is connected to the exhaust emission pipe; The primary cooling adsorption device comprises a box body, and four groups of accommodating chambers are provided on both sides of the box body, which are respectively a water curtain chamber, a low-temperature medium dehumidification chamber, a harmful exhaust gas adsorption chamber and a steam desorption chamber from front to back along the exhaust gas flow path. The accommodating chambers are all provided with porous carbon-ceramic interlayer plates in a pluggable manner. The porous carbon-ceramic interlayer plates are located in different accommodating chambers so that they have different functions. During use, the porous carbon-ceramic interlayer plates located on the exhaust gas flow path are regularly plugged in and replaced in the rear accommodating chamber, and the porous carbon-ceramic interlayer plates at the end are replaced in the front accommodating chamber; wherein, A water supply device is provided in the box above the porous carbon ceramic interlayer plate in the water curtain chamber. Water flows down along the gap in the porous carbon ceramic interlayer plate to form a water curtain wall. After the high-temperature exhaust gas passes through the water curtain wall formed by the porous carbon ceramic interlayer plate, the temperature drops and the granular impurities therein are intercepted. A low-temperature medium release head is arranged in an array in a box body on one side of the porous carbon-ceramic interlayer plate in the low-temperature medium dehumidification chamber. The low-temperature medium release head is connected to an external refrigeration device through a pipeline, and the porous carbon-ceramic interlayer plate is dried by releasing the low-temperature medium onto the porous carbon-ceramic interlayer plate. After the porous carbon ceramic interlayer plate in the harmful exhaust gas adsorption chamber is dried at the front end, the exhaust gas can adsorb harmful substances in the gas after passing through the porous carbon ceramic interlayer plate; The porous carbon ceramic interlayer plate in the steam desorption chamber adsorbs a large amount of harmful gases after the front-end process. At this time, by releasing high-temperature steam onto the porous carbon ceramic interlayer plate in the steam desorption chamber, the harmful gases adsorbed on the porous carbon ceramic interlayer plate can be desorbed. The porous carbon ceramic interlayer plate after desorption enters the water curtain chamber after the next plug-in cycle; wherein, A steam generating chamber is also provided in the box body located at the front end of the water curtain chamber. The water in the steam generating chamber is heated to form steam during the release of high-temperature exhaust gas. The formed high-temperature steam is pumped into the steam desorption chamber through the box body and released onto the porous carbon-ceramic interlayer plate therein, thereby completing the effective desorption of harmful gases.

2. A high-temperature exhaust gas combined cooling system according to claim 1, characterized in that: Electric pulley blocks are laid on the outside of each of the accommodating cavities and the box bodies on both sides. The porous carbon-ceramic interlayer plate is slidably matched with the electric pulley block through a slide rail installed at the bottom. The rotation of the electric pulley block drives the porous carbon-ceramic interlayer plate to translate and slide, thereby moving into or out of the accommodating cavity.

3. A high-temperature exhaust gas combined cooling system according to claim 1 or 2, characterized in that: A transition pulley block is also arranged outside the box body, and the transitional temporary storage of the porous carbon-ceramic interlayer plate during the plugging and pulling and replacing process is completed by the transition pulley block.

4. A high-temperature exhaust gas combined cooling system according to claim 3, characterized in that: Both sides of the box body are also paved with translational slide rails perpendicular to the sliding direction of the porous carbon-ceramic interlayer plate, and the translational slide rails are all provided with exchange seats in a translational and sliding manner. The exchange seats are used to receive the porous carbon-ceramic interlayer plate moved out of the accommodating cavity and transfer the porous carbon-ceramic interlayer plate to one side of the subsequent accommodating cavity.

5. A high-temperature exhaust gas combined cooling system according to claim 4, characterized in that: The box body is also provided with a steam outflow hole and a steam inflow hole, the steam outflow hole and the steam inflow hole are connected through a pipeline, a circulation pump is also installed on the pipeline, and a desorption nozzle connected to the steam inflow hole is also installed in the steam desorption chamber.

6. A high-temperature exhaust gas combined cooling system according to claim 5, characterized in that: The box body is also provided with a water injection hole which is in communication with the steam generation cabin and the water curtain chamber, and the water injection hole is in communication with an external water injection pipeline.

7. A high-temperature exhaust gas combined cooling system according to claim 6, characterized in that: The box body is located above the low-temperature medium dehumidification chamber and is also provided with a low-temperature medium pump injection hole, and the low-temperature medium pump injection hole is connected to an external refrigeration device.

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