Coking circulating ammonia water refrigerating system

Abstract

The utility model discloses a coking circulating ammonia water refrigerating system which comprises a gas cooler, a heat exchange unit, a lithium bromide refrigerating unit and air conditioner end equipment, the gas cooler comprises a gas inlet, a gas outlet, a water inlet and a water outlet, the gas inlet is used for high-temperature coking gas to enter, and the gas outlet is used for low-temperature coking gas to be discharged; the water inlet allows low-temperature ammonia water to enter to cool coal gas, and the water outlet allows high-temperature ammonia water to be discharged; the heat exchange unit is communicated with the water outlet through a first heat exchange pipeline and is used for receiving heat in the high-temperature ammonia water; the heat exchange unit communicates with the lithium bromide refrigeration unit through a second heat exchange pipeline and is used for transmitting heat to the lithium bromide refrigeration unit; the lithium bromide refrigeration unit is used for converting heat into a cooling medium and communicates with the air conditioner terminal equipment through a first transmission pipeline. The problem of waste of waste heat of high-temperature ammonia water in the coking industry is solved, originally discharged heat is converted into valuable cold energy, and gradient utilization of energy is achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of energy utilization and energy saving, and particularly relates to a coking circulating ammonia water refrigeration system. BACKGROUND

[0002] In the production process of the coking industry, high-temperature coking gas needs to be cooled by ammonia water spraying to be converted into low-temperature coking gas. In this process, the low-temperature ammonia water becomes high-temperature ammonia water after absorbing the heat of the high-temperature coking gas. In the traditional process, the high-temperature ammonia water is usually cooled by a cooling tower or other cooling equipment for recycling. However, this cooling method has obvious energy waste problem, because the heat carried by the high-temperature ammonia water is directly discharged into the environment and cannot be effectively utilized.

[0003] With the rising of energy cost and the increasingly stringent environmental protection requirements, how to efficiently utilize the waste heat resources in industrial production has become an important direction of technological innovation. In particular, in the coking industry, the waste heat recovery of high-temperature ammonia water has significant energy saving potential. At present, some technologies have attempted to use waste heat for power generation or heating, but these schemes often have problems such as complex system, high investment cost, limited application range, etc. Moreover, due to the unstable temperature of ammonia water, the output heat fluctuates, which is not conducive to the working stability of the heat utilization unit. CONTENT OF THE INVENTION

[0004] The application provides a coking circulating ammonia water refrigeration system to solve the technical problems of difficult utilization of high-temperature ammonia water waste heat and unstable utilization of waste heat in the traditional coking.

[0005] The technical scheme adopted by the application is as follows:

[0006] A coking circulating ammonia water refrigeration system, comprising a gas cooler, a heat exchange unit, a lithium bromide refrigeration unit and an air conditioning terminal device, the gas cooler comprises an air inlet, an air outlet, a water inlet and a water outlet, the air inlet is used for the high-temperature coking gas to enter, the air outlet is used for the low-temperature coking gas to be discharged, the water inlet is used for the low-temperature ammonia water to enter to cool the gas, and the water outlet is used for the high-temperature ammonia water to be discharged; the heat exchange unit is in communication with the water outlet through a first heat exchange pipeline and is used for receiving the heat in the high-temperature ammonia water; the heat exchange unit is in communication with the lithium bromide refrigeration unit through a second heat exchange pipeline and is used for transmitting the heat to the lithium bromide refrigeration unit; the lithium bromide refrigeration unit is used for converting the heat into a cooling medium and is in communication with the air conditioning terminal device through a first transmission pipeline to provide the cooling medium for the air conditioning terminal device to realize refrigeration.

[0007] The coking circulating ammonia water refrigeration system described in the application further comprises the following additional technical features:

[0008] The refrigeration system further comprises a cold storage tank, and a distribution valve is arranged on the first transmission pipeline, the distribution valve having a first through port communicated with the air conditioner terminal equipment and a second through port communicated with the cold storage tank, the distribution valve being capable of selectively opening the first through port or the second through port to communicate the first transmission pipeline with one of the first through port and the second through port.

[0009] The distribution valve comprises a valve body and a valve core, the valve core being movably arranged in the valve body, the valve core having a first position in which the first through port is opened and the second through port is closed, and a second position in which the second through port is opened and the first through port is closed, the valve core being capable of switching between the first position and the second position.

[0010] The refrigeration system further comprises a controller, the controller being capable of controlling the air conditioner terminal equipment to be opened or closed, and capable of controlling the valve core to move to the first position when the air conditioner terminal equipment is controlled to be opened, and controlling the valve core to move to the second position when the air conditioner terminal equipment is controlled to be closed.

[0011] The refrigeration system further comprises a second transmission pipeline communicated between the cold storage tank and the air conditioner terminal equipment, the cold storage tank being capable of transmitting cooling medium to the air conditioner terminal equipment through the second transmission pipeline when the refrigeration capacity of the lithium bromide refrigeration unit is insufficient.

[0012] The refrigeration system further comprises a refrigeration machine communicated with the air conditioner terminal equipment, the refrigeration machine being capable of refrigerating the air conditioner terminal equipment when the refrigeration capacity of the lithium bromide refrigeration unit is insufficient.

[0013] The first heat exchange pipeline is communicated with the water inlet after penetrating through the heat exchange unit to circulate ammonia water to the coal gas cooler.

[0014] The gas inlet is arranged at the top of the coal gas cooler, the gas outlet is arranged at the bottom of the coal gas cooler, and the water inlet and the water outlet are arranged between the gas inlet and the gas outlet.

[0015] The heat exchange unit is configured as a plate heat exchanger.

[0016] Thanks to the above technical solutions, the application has the following beneficial effects:

[0017] 1. By combining the high-temperature ammonia water waste heat generated during the cooling process of coking gas with a lithium bromide refrigeration system, efficient energy utilization and system integration optimization are achieved. Specifically, the system includes a gas cooler, a heat exchange unit, a lithium bromide refrigeration unit, and air conditioning terminal equipment, forming a complete energy circulation chain. During the coking production process, high-temperature coking gas enters the gas cooler and is cooled by low-temperature ammonia water spray, converting into low-temperature coking gas, while the low-temperature ammonia water absorbs heat to become high-temperature ammonia water. In traditional processes, the heat of high-temperature ammonia water is usually discharged to the environment through a cooling tower, causing energy waste. However, in this system, the heat in high-temperature ammonia water is recovered through a heat exchange unit and transmitted to a lithium bromide refrigeration unit, which uses this heat to generate cooling medium for air conditioning terminal equipment, thereby achieving refrigeration function.

[0018] This design has significant beneficial effects in practical application. First, it solves the problem of waste heat of high-temperature ammonia water in the coking industry, converting the originally discharged heat into valuable cold energy, achieving energy cascade utilization. Second, by combining with the air conditioning system, the system not only meets the cooling demand of coking production process, but also provides refrigeration services for the factory or surrounding area, such as providing cold source for office area, control room or production workshop air conditioning system, significantly reducing the operating energy consumption of air conditioning system. In addition, the integrated design of the system reduces the equipment floor area, reduces the initial investment and operation and maintenance cost, and reduces the heat pollution emission, in line with the green and environmental protection development trend. Overall, the technical scheme of the present application has significant advantages in energy saving and consumption reduction, improving energy utilization efficiency and reducing production cost.

[0019] 2. As a preferred embodiment of the present application, the design of the storage tank and the distribution valve makes the operation of the system more flexible and efficient. The storage tank is used to store the cooling medium generated by the lithium bromide refrigeration unit, while the distribution valve can distribute the cooling medium to the air conditioning terminal equipment or the storage tank according to the actual demand. This design has multiple benefits in practical scenarios. First, the presence of the storage tank solves the problem of mismatch between refrigeration demand and refrigeration capacity. For example, in the coking production process, the generation of high-temperature ammonia water may fluctuate with the production load, resulting in unstable refrigeration capacity of the lithium bromide refrigeration unit. By using the storage tank, the system can store excess cooling medium when the refrigeration capacity is sufficient, and release it for use when the refrigeration capacity is insufficient, thereby ensuring the stable operation of the air conditioning terminal equipment. Second, the design of the distribution valve enables the system to flexibly adjust the flow direction of the cooling medium according to the actual demand. For example, during the daytime production peak, the distribution valve can preferentially supply cooling medium to the air conditioning terminal equipment to meet the refrigeration demand of the factory or office area; while at night or during the production trough, the distribution valve can store the cooling medium in the storage tank for subsequent use. This flexible distribution method not only improves the operating efficiency of the system, but also further reduces energy waste. In addition, the combination of the storage tank and the distribution valve also enhances the emergency capability of the system. For example, when the lithium bromide refrigeration unit is temporarily suspended due to failure or maintenance, the cooling medium stored in the storage tank can continue to provide cooling capacity to the air conditioning terminal equipment, ensuring the comfort of the production environment and the normal operation of the equipment. Overall, this technical solution has significant benefits in improving the flexibility, stability and energy utilization efficiency of the system.

[0020] 3. As a preferred embodiment of the present application, the valve core can move within the valve body, having a first position that opens the first port and closes the second port, and a second position that opens the second port and closes the first port. This design has significant benefits in practical applications. First, the movable design of the valve core makes the operation of the distribution valve more precise and reliable. For example, when cooling medium needs to be supplied to the air conditioning terminal equipment, the valve core can be quickly switched to the first position to ensure efficient delivery of the cooling medium; while when the cooling medium needs to be stored in the storage tank, the valve core can be quickly switched to the second position to avoid waste of the cooling medium. This precise control method not only improves the operating efficiency of the system, but also reduces energy consumption. Second, the structural design of the valve core makes the sealing performance of the distribution valve more superior, effectively preventing leakage of the cooling medium during transportation, thereby ensuring the stable operation of the system.

[0021] In addition, the movable design of the valve core also reduces the maintenance cost of the distribution valve. For example, during long-term use, the valve core may be affected in its movable performance due to wear or impurity accumulation, but since the valve core is simple in structure and easy to disassemble, maintenance personnel can quickly clean or replace it, thereby reducing the downtime of the system. The technical solution has remarkable beneficial effects in improving the accuracy, reliability and maintenance convenience of the distribution valve.

[0022] 4. As a preferred embodiment of the present application, the controller can automatically control the position switching of the valve core according to the operating state of the air conditioning terminal equipment, thereby realizing intelligent distribution of the cooling medium. This design has multiple beneficial effects in actual scenarios. First, the introduction of the controller significantly improves the automation level of the system. For example, when the air conditioning terminal equipment is turned on, the controller can automatically switch the valve core to the first position, so that the cooling medium is preferentially supplied to the air conditioning terminal equipment; when the air conditioning terminal equipment is turned off, the controller can automatically switch the valve core to the second position, and store the cooling medium in the cold storage tank. This automated operation not only reduces the need for manual intervention, but also improves the operating efficiency of the system. Second, the intelligent control function of the controller enables the system to dynamically adjust the distribution mode of the cooling medium according to actual needs. For example, in the case of large fluctuations in coking production load, the controller can automatically adjust the position of the valve core according to real-time data to ensure the balance between supply and demand of the cooling medium, thereby avoiding energy waste. In addition, the design of the controller also enhances the scalability of the system. For example, in future technology upgrades, the controller can achieve more functions through software updates or hardware extensions, such as integration with the plant's energy management system to achieve more efficient energy scheduling and optimization.

[0023] 5. As a preferred embodiment of the present application, the presence of the second transmission pipeline enhances the emergency capability and flexibility of the system. For example, when the lithium bromide refrigeration unit is temporarily suspended due to failure or maintenance, the cooling medium stored in the cold storage tank can be directly supplied to the air conditioning terminal equipment through the second transmission pipeline, ensuring the comfort of the production environment and the normal operation of the equipment. This design avoids production interruption or environmental temperature fluctuations caused by the shutdown of the refrigeration unit, improving the reliability of the system. Second, the design of the second transmission pipeline enables the system to better cope with fluctuations in refrigeration demand. For example, when the coking production load suddenly increases or the demand for air conditioning terminal equipment surges, the cold storage tank can quickly replenish the cooling medium through the second transmission pipeline to meet the additional refrigeration demand, thereby avoiding the impact on production or working environment due to insufficient refrigeration capacity.

[0024] In addition, the design of the second transmission pipeline also improves the energy utilization efficiency of the system. For example, at night or during the production low period, the lithium bromide refrigeration unit can continue to run and store the excess cooling medium to the cold storage tank, and then release and use it during the day or during the production peak period. This "peak load shifting" operation not only reduces the peak load of the system, but also further reduces energy waste. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0026] Figure 1 a schematic diagram of a coking circulating ammonia water refrigeration system according to an embodiment of the present application;

[0027] Figure 2 a cross-sectional view of a distribution valve according to an embodiment of the present application Figure 1 :

[0028] Figure 3 a cross-sectional view of a distribution valve according to an embodiment of the present application Figure 2 .

[0029] List of components and reference numerals:

[0030] 1 gas cooler, 11 inlet, 12 outlet, 13 water inlet, 14 water outlet, 15 primary cooling inlet, 16 primary cooling outlet;

[0031] 2 heat exchange unit;

[0032] 3 lithium bromide refrigeration unit;

[0033] 4 air conditioning terminal device;

[0034] 5 first heat exchange pipeline;

[0035] 6 second heat exchange pipeline;

[0036] 7 first transmission pipeline;

[0037] 8 cold storage tank;

[0038] 9 distribution valve, 91 first through port, 92 second through port, 93 valve body, 94 valve core;

[0039] 10 second transmission pipeline;

[0040] 110 refrigeration machine;

[0041] 120 control valve. DETAILED DESCRIPTION

[0042] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0043] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced without the specific details. In other instances, well-known methods, procedures, components, and circuits have not been described in detail so as not to unnecessarily obscure aspects of the present application. It can be understood that the embodiments of the present application and the characteristics of each embodiment can be combined with each other under the condition of no conflict.

[0044] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0045] In the present application, unless specifically defined and limited otherwise, the terms "mount", "connect", "connection", "fixed", and the like are to be broadly understood, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection, can also be communication; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the specification, the description referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] As Figure 1As shown, a coking circulating ammonia water refrigeration system includes a coal gas cooler 1, a heat exchange unit 2, a lithium bromide refrigeration unit 3, and an air conditioning terminal device 4. The coal gas cooler 1 includes an air inlet 11, an air outlet 12, a water inlet 13, and a water outlet 14. The air inlet 11 is used for high-temperature coking gas to enter, the air outlet 12 is used for low-temperature coking gas to be discharged, the water inlet 13 is used for low-temperature ammonia water to enter to cool the gas, and the water outlet 14 is used for high-temperature ammonia water to be discharged. The heat exchange unit 2 is in communication with the water outlet 14 through a first heat exchange pipeline 5, and is used to receive heat from the high-temperature ammonia water. The heat exchange unit 2 is in communication with the lithium bromide refrigeration unit 3 through a second heat exchange pipeline 6, and is used to transmit heat to the lithium bromide refrigeration unit 3. The lithium bromide refrigeration unit 3 is used to convert the heat into a cooling medium, and is in communication with the air conditioning terminal device 4 through a first transmission pipeline 7 to provide the cooling medium to the air conditioning terminal device 4 to achieve refrigeration.

[0048] By combining the high-temperature ammonia water waste heat generated during the cooling of coking gas with the lithium bromide refrigeration system, efficient use of energy and integration optimization of the system are achieved. Specifically, the system includes a coal gas cooler 1, a heat exchange unit 2, a lithium bromide refrigeration unit 3, and an air conditioning terminal device 4, forming a complete energy circulation chain. During the coking production process, after the high-temperature coking gas enters the coal gas cooler 1, it is cooled by low-temperature ammonia water spraying and is converted into low-temperature coking gas, while the low-temperature ammonia water absorbs heat to become high-temperature ammonia water. In the traditional process, the heat of the high-temperature ammonia water is usually discharged to the environment through a cooling tower, causing energy waste. However, in this system, the heat in the high-temperature ammonia water is recovered by the heat exchange unit 2 and transmitted to the lithium bromide refrigeration unit 3. The lithium bromide refrigeration unit 3 uses this heat to generate a cooling medium, which is supplied to the air conditioning terminal device 4, thereby achieving refrigeration function.

[0049] This design has significant beneficial effects in practical application. First, it solves the problem of waste of high-temperature ammonia water waste heat in the coking industry, and converts the originally discharged heat into valuable cold energy, achieving energy cascade utilization. Second, by combining with the air conditioning system, this system not only meets the cooling demand of coking production process, but also provides refrigeration services for the factory or surrounding area, such as providing a cold source for the air conditioning system of the office area, control room or production workshop, significantly reducing the operating energy consumption of the air conditioning system. In addition, the integrated design of the system reduces the equipment floor area, reduces the initial investment and operation and maintenance cost, and reduces the heat pollution emission, which conforms to the development trend of green environmental protection. Overall, the technical scheme of the present application has significant advantages in energy saving and consumption reduction, improving energy utilization efficiency, and reducing production cost.

[0050] Specifically, the working process and working principle of the coking circulating ammonia water refrigeration system of the present application are as follows: firstly, the coal gas cooling process: high-temperature coking coal gas enters from the gas inlet 11 of the coal gas cooler 1, and low-temperature ammonia water sprays into the coal gas cooler 1 from the water inlet 13. In the coal gas cooler 1, the high-temperature coking coal gas directly contacts with the low-temperature ammonia water, and through heat exchange, the temperature of the coal gas is lowered to become low-temperature coking coal gas and is discharged from the gas outlet 12. After the low-temperature ammonia water absorbs the heat in the coal gas, the temperature is raised to become high-temperature ammonia water and is discharged from the water outlet 14. Then, the waste heat recovery process of the high-temperature ammonia water: the high-temperature ammonia water enters the heat exchange unit 2 through the first heat exchange pipeline 5. In the heat exchange unit 2, the high-temperature ammonia water indirectly exchanges heat with the lithium bromide refrigeration unit 3, and the heat is transferred from the high-temperature ammonia water to the lithium bromide refrigeration unit 3. After the high-temperature ammonia water releases heat in the heat exchange unit 2, the temperature is lowered, and it is transported to the water inlet 13 of the coal gas cooler 1 through the first heat exchange pipeline 5, realizing the recycling of the ammonia water. The cooling medium generated by the lithium bromide refrigeration unit 3 is transported to the air conditioning terminal equipment 4 through the first transmission pipeline 7 to provide cold energy for the air conditioning system, realizing the refrigeration function.

[0051] As for the working principle of the lithium bromide refrigeration unit 3, the working principle is as follows: it is based on the characteristics of lithium bromide solution. The lithium bromide solution has strong water absorption, can absorb water vapor and release heat. In the lithium bromide refrigeration unit 3, the heat is transferred from the heat exchange unit 2 to the generator, heating the lithium bromide dilute solution, evaporating the water in it to form water vapor. The water vapor enters the condenser and is condensed into liquid water by the cooling water. The liquid water enters the evaporator and evaporates in a low-pressure environment, absorbing heat to produce a refrigeration effect. The evaporated water vapor is absorbed by the lithium bromide concentrated solution to form a dilute solution again, completing the cycle, thus realizing heat absorption refrigeration.

[0052] As a preferred embodiment of the present application, as shown in Figures 1 to 3 The refrigeration system further comprises a cold storage tank 8, and the first transmission pipeline 7 is provided with a distribution valve 9. The distribution valve 9 has a first through port 91 communicating with the air conditioning terminal equipment 4 and a second through port 92 communicating with the cold storage tank 8. The distribution valve 9 can selectively open the first through port 91 or the second through port 92 to make the first transmission pipeline 7 communicate with one of the first through port 91 and the second through port 92.

[0053] The design of the cold storage tank 8 and the distribution valve 9 makes the system more flexible and efficient in operation. The cold storage tank 8 is used to store the cooling medium generated by the lithium bromide refrigeration unit 3, while the distribution valve 9 can distribute the cooling medium to the air conditioning terminal equipment 4 or the cold storage tank 8 according to actual needs. This design has multiple benefits in practical scenarios. First, the presence of the cold storage tank 8 solves the problem of mismatch between refrigeration demand and refrigeration capacity. For example, during the coking production process, the amount of high-temperature ammonia water generated may fluctuate with the production load, causing the refrigeration capacity of the lithium bromide refrigeration unit 3 to be unstable. Through the cold storage tank 8, the system can store excess cooling medium when the refrigeration capacity is sufficient, and release it for use when the refrigeration capacity is insufficient, thereby ensuring the stable operation of the air conditioning terminal equipment 4. Second, the design of the distribution valve 9 allows the system to flexibly adjust the flow direction of the cooling medium according to actual needs. For example, during the daytime production peak, the distribution valve 9 can preferentially supply cooling medium to the air conditioning terminal equipment 4 to meet the refrigeration demand of the factory or office area; while at night or during the production trough, the distribution valve 9 can store the cooling medium in the cold storage tank 8 for subsequent use. This flexible distribution method not only improves the efficiency of the system, but also further reduces energy waste. In addition, the combination of the cold storage tank 8 and the distribution valve 9 also enhances the emergency capability of the system. For example, when the lithium bromide refrigeration unit 3 is temporarily suspended due to failure or maintenance, the cooling medium stored in the cold storage tank 8 can continue to provide cooling capacity to the air conditioning terminal equipment 4, ensuring the comfort of the production environment and the normal operation of the equipment.

[0054] As a preferred embodiment of the present embodiment, as shown in Figures 1 to 3 The distribution valve 9 includes a valve body 93 and a valve core 94, the valve core 94 is movably installed in the valve body 93, the valve core 94 has a first position that opens the first port 91 and closes the second port 92, and a second position that opens the second port 92 and closes the first port 91, and the valve core 94 can switch between the first position and the second position.

[0055] Figure 2 When the valve core 94 is in the first position, the path shown by the arrow X is the path of the cooling medium flowing out of the first port 91; Figure 3 When the valve core 94 is in the second position, the path shown by the arrow Y is the path of the cooling medium flowing out of the second port 92.

[0056] The valve core 94 can move in the valve body 93, having a first position to open the first port 91 and close the second port 92, and a second position to open the second port 92 and close the first port 91. This design has significant benefits in practical applications. First, the movable design of the valve core 94 makes the operation of the distribution valve 9 more accurate and reliable. For example, when the cooling medium needs to be supplied to the air conditioning terminal device 4, the valve core 94 can quickly switch to the first position to ensure efficient delivery of the cooling medium; when the cooling medium needs to be stored in the cold storage tank 8, the valve core 94 can quickly switch to the second position to avoid waste of the cooling medium. This precise control method not only improves the efficiency of the system, but also reduces energy consumption. Second, the structural design of the valve core 94 makes the sealing performance of the distribution valve 9 more superior, which can effectively prevent the leakage of the cooling medium during transportation, thereby ensuring the stable operation of the system.

[0057] As a preferred example under this embodiment, the refrigeration system further comprises a controller capable of controlling the opening or closing of the air conditioning terminal device 4, and capable of controlling the valve core 94 to move to the first position when the air conditioning terminal device 4 is controlled to open, and capable of controlling the valve core 94 to move to the second position when the air conditioning terminal device 4 is controlled to close.

[0058] The controller can automatically control the position switching of the valve 120 core according to the operating state of the air conditioning terminal device 4, thereby realizing intelligent distribution of the cooling medium. This design has multiple benefits in practical scenarios. First, the introduction of the controller significantly improves the automation level of the system. For example, when the air conditioning terminal device 4 is turned on, the controller can automatically switch the valve core 94 to the first position to preferentially supply the cooling medium to the air conditioning terminal device 4; when the air conditioning terminal device 4 is turned off, the controller can automatically switch the valve core 94 to the second position to store the cooling medium in the cold storage tank 8. This automated operation not only reduces the need for manual intervention, but also improves the efficiency of the system. Second, the intelligent control function of the controller enables the system to dynamically adjust the distribution mode of the cooling medium according to actual needs. For example, in the case of large fluctuations in coking production load, the controller can automatically adjust the position of the valve core 94 according to real-time data to ensure the balance between supply and demand of the cooling medium, thereby avoiding energy waste. In addition, the design of the controller also enhances the scalability of the system. For example, in future technology upgrades, the controller can achieve more functions through software updates or hardware extensions, such as integration with the factory's energy management system to achieve more efficient energy scheduling and optimization.

[0059] Preferably, as shown in Figure 1 The refrigeration system further comprises a second transmission pipeline 10 connecting the cold storage tank 8 and the air conditioning terminal device 4, and when the refrigeration capacity of the lithium bromide refrigerator 110 group is insufficient, the cold storage tank 8 transmits the cooling medium to the air conditioning terminal device 4 through the second transmission pipeline 10.

[0060] The presence of the second transmission pipeline 10 enhances the emergency capability and flexibility of the system. For example, when the lithium bromide refrigeration unit 3 is temporarily suspended due to failure or maintenance, the cooling medium stored in the cold storage tank 8 can be directly supplied to the air conditioning terminal equipment 4 through the second transmission pipeline 10, ensuring the comfort of the production environment and the normal operation of the equipment. This design avoids production interruption or environmental temperature fluctuations caused by refrigeration unit downtime, improving the reliability of the system. Secondly, the design of the second transmission pipeline 10 enables the system to better cope with fluctuations in refrigeration demand. For example, when the coking production load suddenly increases or the air conditioning terminal equipment 4 demand surges, the cold storage tank 8 can quickly replenish cooling medium through the second transmission pipeline 10 to meet additional refrigeration demand, thereby avoiding the impact of insufficient refrigeration on production or working environment. In addition, the design of the second transmission pipeline 10 also improves the energy utilization efficiency of the system. For example, during the night or during the production trough, the lithium bromide refrigeration unit 3 can continue to operate and store excess cooling medium in the cold storage tank 8, and then release and use it through the second transmission pipeline 10 during the day or during the production peak. This "peak shaving" operation mode not only reduces the peak load of the system, but also further reduces energy waste.

[0061] As a preferred embodiment of the present application, as shown in Figure 1 The refrigeration system further comprises a refrigeration machine 110 communicating with the air conditioning terminal equipment 4, and when the refrigeration capacity of the lithium bromide refrigeration unit 110 group is insufficient, the refrigeration machine 110 refrigerates the air conditioning terminal equipment 4.

[0062] The design of the refrigeration machine 110 enables the system to provide additional refrigeration capacity to the air conditioning terminal equipment 4 through the refrigeration machine 110 when the lithium bromide refrigeration unit 3 is insufficient. This design has multiple benefits in practical scenarios.

[0063] Firstly, the introduction of the refrigeration machine 110 enhances the redundancy and reliability of the system. For example, in the event of a sudden increase in coking production load or the lithium bromide refrigeration unit 3 fails to meet the refrigeration demand due to a fault, the refrigeration machine 110 can be quickly started and provide additional cooling capacity to ensure the normal operation of the air conditioning terminal equipment 4. This design avoids the production environment temperature rising or equipment overheating due to insufficient refrigeration capacity, improving the stability of the system. Secondly, the design of the refrigeration machine 110 enables the system to better cope with seasonal demand changes. For example, in the hot summer weather, the refrigeration demand of the air conditioning terminal equipment 4 may increase significantly, at which time the refrigeration machine 110 can work as an auxiliary cold source to cooperate with the lithium bromide refrigeration unit 3 to meet the higher refrigeration demand. In addition, the design of the refrigeration machine 110 also improves the adaptability of the system. For example, during the coking production process, the generation amount of high-temperature ammonia water may fluctuate with the production load, causing the refrigeration capacity of the lithium bromide refrigeration unit 3 to be unstable. Through the supplement of the refrigeration machine 110, the system can meet the demand of the air conditioning terminal equipment 4 in any case, thereby ensuring the comfort of the production environment and the normal operation of the equipment.

[0064] As a preferred embodiment of the present application, as shown in Figure 1 The first heat exchange pipeline 5 is connected to the water inlet 13 after passing through the heat exchange unit 2 to circulate and deliver ammonia water to the gas cooler 1.

[0065] The circulation design of the first heat exchange pipeline 5 significantly improves the utilization efficiency of ammonia water. For example, in the traditional process, high-temperature ammonia water is usually cooled by a cooling tower before being recycled, which not only wastes the heat in the high-temperature ammonia water but also increases the operating energy consumption of the cooling tower. The present system recovers the heat in the high-temperature ammonia water through the first heat exchange pipeline 5 and transmits it to the lithium bromide refrigeration unit 3, while the cooled ammonia water is delivered back to the gas cooler 1, realizing closed-loop recycling of ammonia water. This design not only reduces the consumption of ammonia water but also reduces the operating cost of the cooling tower.

[0066] Secondly, the circulation design of the first heat exchange pipeline 5 also improves the overall energy efficiency of the system. For example, during the coking production process, the heat of high-temperature ammonia water is efficiently recovered and used for refrigeration, while the cooled ammonia water can be reused for gas cooling, forming a high-efficiency energy circulation chain. This design not only reduces energy waste but also further reduces the operating cost of the system. In addition, the circulation design of the first heat exchange pipeline 5 also reduces the dependence on external water sources and reduces water consumption, in line with the green and environmentally friendly development trend.

[0067] As a preferred embodiment of the present application, as shown in Figure 1 The gas inlet 11 is located at the top of the gas cooler 1, the gas outlet 12 is located at the bottom of the gas cooler 1, and the water inlet 13 and the water outlet 14 are located between the gas inlet 11 and the gas outlet 12.

[0068] The structural design of the coal gas cooler 1 significantly improves the efficiency of coal gas cooling. For example, after the high-temperature coking coal gas enters the coal gas cooler 1 from the top, it is fully contacted with the low-temperature ammonia water entering from the water inlet 13, and efficient cooling is achieved through countercurrent heat exchange. This design not only improves the heat exchange efficiency, but also ensures the stable output of low-temperature coking coal gas. Secondly, the arrangement of the water inlet 13 and the water outlet 14 enables the ammonia water to be uniformly distributed within the coal gas cooler 1, thereby avoiding the occurrence of local overheating or overcooling, further improving the operational stability of the system. In addition, the structural design of the coal gas cooler 1 also reduces the maintenance cost of the equipment. For example, the arrangement of the gas inlet 11 and the gas outlet 12 makes it easier to clean the accumulated ash and impurities inside the coal gas cooler 1, thereby reducing the downtime and maintenance frequency of the equipment.

[0069] As a preferred embodiment of the present application, the heat exchange unit 2 is configured as a plate heat exchanger.

[0070] The plate heat exchanger has a large heat exchange area and high heat transfer performance, which can quickly transfer the heat in the high-temperature ammonia water to the lithium bromide refrigeration unit 3, thereby improving the overall energy efficiency of the system. Secondly, the compact structural design of the plate heat exchanger reduces the floor area of the equipment, making the system more suitable for installation and operation in a factory environment with limited space. In addition, the design of the plate heat exchanger also reduces the operation and maintenance cost of the system, which is easy to disassemble and clean, thereby reducing the downtime and maintenance frequency of the equipment. At the same time, the corrosion resistance of the plate heat exchanger also prolongs the service life of the equipment, further reducing the operation cost of the system.

[0071] Preferably, as shown in Figure 1 the first heat exchange pipeline 5, the second heat exchange pipeline 6, the first transmission pipeline 7, the second transmission pipeline 10 and the remaining pipelines of the present application are provided with control valves 120, which can control the opening and closing of each pipeline to adapt to different working states of the refrigeration system.

[0072] Preferably, as shown in Figure 1 the coal gas cooler 1 of the present application is also provided with a primary cooling inlet 15 and a primary cooling outlet 16 between the gas inlet 11 and the water inlet 13, the primary cooling inlet 15 is used to transport primary cooling water for preliminary cooling of high-temperature coal gas, and the primary cooling water is discharged from the primary cooling outlet 16 after absorbing heat and rising in temperature.

[0073] The unmentioned parts in the present application can be realized by adopting or referring to the existing technology.

[0074] Each embodiment in the present specification is described in a progressive manner, and the same or similar parts between each embodiment can be mutually referred to, and each embodiment mainly describes the differences from other embodiments.

[0075] The above merely provides an example of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application should be included in the scope of claims of the present application.

Claims

1. A coking cycle ammonia water refrigeration system characterized by: The system comprises a coal gas cooler, a heat exchange unit, a lithium bromide refrigeration unit and an air conditioner terminal device, the coal gas cooler comprises an inlet for high-temperature coking gas, an outlet for low-temperature coking gas, an inlet for low-temperature ammonia water and an outlet for high-temperature ammonia water; The heat exchange unit is connected with the outlet for high-temperature ammonia water through a first heat exchange pipeline to receive heat from the high-temperature ammonia water; The heat exchange unit is connected with the lithium bromide refrigeration unit through a second heat exchange pipeline to transfer heat to the lithium bromide refrigeration unit; The lithium bromide refrigeration unit is used to convert heat into cooling medium and is connected with the air conditioner terminal device through a first transmission pipeline to provide cooling medium to the air conditioner terminal device to achieve refrigeration.

2. The system according to claim 1, further comprising a cold storage tank, and a distribution valve is arranged on the first transmission pipeline, the distribution valve has a first opening connected with the air conditioner terminal device and a second opening connected with the cold storage tank, and the distribution valve can selectively open the first opening or the second opening to connect the first transmission pipeline with one of the first opening and the second opening.

3. The system according to claim 2, wherein the distribution valve comprises a valve body and a valve core, the valve core is movably arranged in the valve body, the valve core has a first position to open the first opening and close the second opening and a second position to open the second opening and close the first opening, and the valve core can be switched between the first position and the second position.

4. The system according to claim 3, further comprising a controller, the controller can control the air conditioner terminal device to be opened or closed, and can control the valve core to move to the first position when the air conditioner terminal device is controlled to be opened and to move to the second position when the air conditioner terminal device is controlled to be closed.

5. The system according to any one of claims 2 to 4, further comprising a second transmission pipeline connecting the cold storage tank with the air conditioner terminal device, and when the refrigeration capacity of the lithium bromide refrigeration unit is insufficient, the cold storage tank transmits cooling medium to the air conditioner terminal device through the second transmission pipeline.

6. The system according to claim 1, further comprising a refrigeration machine connected with the air conditioner terminal device, and when the refrigeration capacity of the lithium bromide refrigeration unit is insufficient, the refrigeration machine refrigerates the air conditioner terminal device.

7. The system according to claim 1, wherein the first heat exchange pipeline is connected with the inlet for low-temperature ammonia water after penetrating through the heat exchange unit to circulate ammonia water to the coal gas cooler.

8. The system according to claim 1, ​ ​ ​ ​ ​ ​ The gas inlet is located at the top of the coal gas cooler, the gas outlet is located at the bottom of the coal gas cooler, and the water inlet and the water outlet are located between the gas inlet and the gas outlet.

9. The coking circulating ammonia water refrigeration system according to claim 1, characterized in that, The heat exchange unit is configured as a plate heat exchanger.

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