Ice maker inlet buffer with cooling capacity recovery function

Abstract

The utility model relates to the technical field of gas-liquid separation, in particular to an ice maker inlet buffer with a cooling capacity recovery function, which can prevent ice maker inlet gas ammonia with liquid from influencing equipment operation, can recover cooling capacity and improves the condensation effect of an evaporative ammonia cooler. Comprising a buffer body, a heat exchanger assembly, a demister assembly and an automatic pollution discharge assembly. A heat exchanger assembly is installed in the middle of the buffer body, a demister assembly is installed on the upper portion in the buffer body, the lower portion of the buffer body is connected with a gas ammonia inlet assembly, the top of the buffer body is connected with a gas ammonia outlet assembly, and an automatic pollution discharge assembly is installed at the bottom of the buffer body.

Description

Technical Field

[0001] The utility model relates to the technical field of gas-liquid separation, in particular to an ice machine inlet buffer with cold recovery function. Background Art

[0002] In the combined alkali production process, the refrigeration system of the second process of the combined alkali production adopts liquid ammonia as the refrigerant. Liquid ammonia is added to the external cooler for heat exchange with the circulating mother liquid. After the liquid ammonia is gasified, it is compressed and condensed by the ammonia ice machine and then recycled. In order to prevent the gas ammonia from carrying liquid and affecting the operation of the ice machine, a gas ammonia buffer is set at the inlet of the ice machine to separate the gas ammonia at the inlet of the ice machine by gravity sedimentation to ensure the normal operation of the equipment.

[0003] The current problems are: because the internal structure of the gas-ammonia buffer is relatively simple, generally a hollow cylinder structure, the gas-ammonia is separated from the gas and liquid only by gravity sedimentation, and only some large particles of liquid droplets can be separated, and the separation is not thorough; at the same time, when the external cooler is operated, due to changes in process conditions, such as tower inversion and increased production load, it is very easy to cause the gas-ammonia in the ice machine to carry liquid. On the one hand, the temperature is lowered due to the gasification of liquid ammonia, and the frosting of the transmission pipeline affects the loss of cooling capacity; on the other hand, the gas-ammonia carrying liquid is very likely to form liquid hammer to damage the ice machine, and even cause equipment safety accidents, affecting the production of the subsequent process sections. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an ice machine inlet buffer with cold recovery, which can prevent the ammonia liquid in the ice machine inlet gas from affecting the operation of the equipment, recover the cold energy, and improve the condensing effect of the evaporative ammonia cooler.

[0005] The utility model discloses an ice machine inlet buffer with cold recovery, comprising a buffer body, a heat exchanger assembly, a demister assembly and an automatic sewage discharge assembly, wherein the heat exchanger assembly is installed in the middle of the buffer body, the demister assembly is installed on the upper part of the buffer body, the lower part of the buffer body is connected with the gas ammonia inlet assembly, the top of the buffer body is connected with the gas ammonia outlet assembly, and the bottom of the buffer body is installed with the automatic sewage discharge assembly; after the gas ammonia enters from the bottom of the buffer through the gas ammonia inlet assembly, large particle droplets are initially separated by gravity sedimentation, and then heat is exchanged with circulating cooling water through the heat exchanger during the rising process, liquid ammonia entrained in the gas ammonia is gasified, and the gas ammonia is superheated, and finally after the mist and foam are separated by the buffer outlet demister, the gas-liquid separation effect of the gas ammonia can reach 90% or more, which can prevent the ice machine inlet gas ammonia carrying liquid from affecting the operation of the equipment, and at the same time, the cold capacity can be recovered, and the exchange of cold circulating cooling water can improve the condensation effect of the evaporative ammonia cooler.

[0006] Preferably, the buffer body is composed of a straight cylindrical cavity, an upper head and a lower head, and the straight cylindrical cavity is connected to the upper head and the lower head by welding; to ensure the separation effect, the diameter of the straight cylindrical cavity is set to ensure that the gas operating flow rate is less than or equal to 1.5m / s and the residence time is greater than or equal to 2.0 seconds.

[0007] Preferably, the heat exchanger assembly includes a circulating water booster pump, a heat exchange coil, a circulating water inlet valve group and a circulating water outlet valve group. The heat exchange coil is located in the middle of the buffer body, the input end of the heat exchange coil is equipped with a circulating water booster pump, and the inlet and outlet of the heat exchange coil are respectively equipped with a circulating water inlet valve group and a circulating water outlet valve group; the circulating water inlet of the heat exchange coil is connected to the hot water pool of the evaporative ammonia cooler at the outlet of the ice machine device, and is pressurized by the circulating water booster pump and enters from the upper end of the heat exchange coil, and after cooling, it is discharged from the lower end of the heat exchange coil back to the cooling water inlet of the evaporative ammonia cooler, realizing reverse heat exchange with gas ammonia, thereby improving the heat exchange effect.

[0008] Preferably, the circulating water booster pump adopts a serpentine coil structure, which can prevent the blockage of the super-freezing pipe caused by stagnation of circulating cooling water compared to other structures (such as box type, tube type, etc.).

[0009] Preferably, the separation filler of the demister assembly adopts a wire mesh structure, and the height is set to 400-600 mm, and the entrained mist that is not completely separated is further separated through the deflection effect of the filler.

[0010] Preferably, the automatic sewage discharge component includes a liquid level gauge, a sewage discharge root valve and a sewage discharge automatic control valve. The liquid level gauge is installed at the lower front end of the buffer body. The bottom of the buffer body is connected to a sewage pipe, and the sewage discharge root valve and the sewage discharge automatic control valve are installed on the sewage pipe. The liquid level gauge provides a control signal source for the opening and closing of the sewage discharge automatic control valve, so that the sewage discharge automatic control valve is automatically opened and closed, and the liquid ammonia separated and settled in the buffer and a small amount of ice machine lubricating oil droplets are automatically discharged to the subsequent ammonia oil recovery device, so that the separated droplets can be automatically discharged and recovered.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: after the gaseous ammonia enters from the bottom of the buffer through the gaseous ammonia inlet component, the large particle droplets are firstly separated by gravity sedimentation, and then the liquid ammonia entrained in the gaseous ammonia is vaporized through the heat exchanger and the circulating cooling water during the rising process, and the gaseous ammonia is superheated. Finally, after the mist and foam are separated by the defogger at the buffer outlet, the gas-liquid separation effect of the gas-ammonia can reach 90% or more, which can prevent the gaseous ammonia carrying liquid at the inlet of the ice machine from affecting the operation of the equipment. At the same time, the cooling capacity can be recovered, and the exchange of cold circulating cooling water can improve the condensation effect of the evaporative ammonia cooler. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a front structural schematic diagram of the utility model;

[0014] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0015] Markings in the attached drawings: 1. Buffer body; 2. Heat exchanger assembly; 3. Defogger assembly; 4. Automatic sewage discharge assembly; 5. Gas ammonia inlet assembly; 6. Gas ammonia outlet assembly; 11. Straight cylinder cavity; 12. Upper head; 13. Lower head; 21. Circulating water booster pump; 22. Heat exchange coil; 23. Circulating water inlet valve group; 41. Liquid level meter; 42. Sewage root valve; 43. Sewage automatic control valve. DETAILED DESCRIPTION

[0016] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0017] like Figures 1 to 3 As shown, a heat exchanger assembly 2 is installed in the middle of the buffer body 1, a demister assembly 3 is installed on the upper part of the buffer body 1, a gas ammonia inlet assembly 5 is connected to the lower part of the buffer body 1, a gas ammonia outlet assembly 6 is connected to the top of the buffer body 1, and an automatic sewage discharge assembly 4 is installed at the bottom of the buffer body 1. The buffer body 1 is composed of a straight cylindrical cavity 11, an upper head 12 and a lower head 13. The straight cylindrical cavity 11 is connected to the upper head 12 and the lower head 13 by welding. The heat exchanger assembly 2 includes a circulating water booster pump 21, a heat exchange coil 22, a circulating water inlet valve group 23 and a circulating water outlet valve group 24. The heat exchange coil 22 is located in the middle of the buffer body 1, and a circulating water booster pump 21 is installed at the input end of the heat exchange coil 22, and a circulating water inlet valve group 23 and a circulating water outlet valve group 24 are respectively installed at the inlet and outlet of the heat exchange coil 22. The heat exchange coil 22 adopts a serpentine coil structure, and the demister assembly 3 separation filler adopts a wire mesh structure. The automatic sewage discharge assembly 4 includes a liquid level meter 41, a sewage discharge root valve 42 and a sewage discharge automatic control valve 43. The liquid level meter 41 is installed at the lower front end of the buffer body 1. The bottom of the buffer body 1 is connected to a sewage pipe, and the sewage pipe is installed with a sewage discharge root valve 42 and a sewage discharge automatic control valve 43;

[0018] The straight cylindrical cavity 11 is connected to the upper head 12 and the lower head 13 by welding. The diameter of the straight cylindrical cavity 11 is set to ensure that the gas working condition flow rate is less than or equal to 1.5m / s and the residence time is greater than or equal to 2.0 seconds; the circulating water inlet of the heat exchange coil 22 is connected to the hot water pool of the evaporative ammonia cooler at the outlet of the ice machine device, and is pressurized by the circulating water booster pump 21 to enter from the upper end of the heat exchange coil 22, and after cooling, it is discharged from the lower end of the heat exchange coil 22 and returned to the circulating cooling water inlet of the evaporative ammonia cooler, realizing reverse heat exchange with gas ammonia, thereby improving the heat exchange effect; the heat exchange coil 22 is set to a serpentine coil structure, Compared with other structures, such as tube type and box type, it can prevent the blockage of super-freezing pipes caused by stagnation of circulating cooling water; the separation filler adopts a wire mesh structure with a height set to 400-600mm. Through the baffle effect of the filler, the entrained mist that has not been completely separated is further separated; the liquid level meter 41 provides a control signal source for the opening and closing of the automatic sewage control valve 43, so that the automatic sewage control valve 43 is automatically opened and closed, and the liquid ammonia separated and settled by the buffer and a small amount of ice machine lubricating oil droplets are automatically discharged to the subsequent ammonia oil recovery device, so that the separated droplets can be automatically discharged and recovered.

[0019] like Figures 1 to 3 As shown, the utility model is an ice machine inlet buffer with cold recovery. When it is working, the gas and liquid enter the bottom of the buffer body 1 through the gas ammonia inlet component 5, and the large particle droplets are initially separated by gravity sedimentation. Then, during the rising process, the heat is exchanged with the circulating cooling water through the heat exchange coil 22, and the liquid ammonia entrained by the gas ammonia is gasified, and the gas ammonia is superheated; the circulating cooling water is connected to the hot water pool of the evaporative ammonia cooler at the outlet of the ice machine device, and is pressurized by the circulating water pressure pump 21 and enters from the upper end of the heat exchange coil 22. After cooling, the water returns to the circulating cooling water inlet of the evaporative ammonia cooler from the lower end of the heat exchange coil 22 to realize reverse heat exchange with the gas ammonia to recover the cold; the entrained mist that has not been completely separated is further separated through the baffle effect of the filler, and then passes through the gas ammonia outlet component 6 to the ice machine inlet; the liquid level meter 41 provides a control signal source for the opening and closing of the automatic sewage control valve 43, so that the automatic sewage control valve 43 is automatically opened and closed, and the liquid ammonia separated and precipitated by the buffer and a small amount of ice machine lubricating oil droplets are automatically discharged to the subsequent ammonia oil recovery device.

[0020] The liquid level gauge 41, the sewage root valve 42 and the sewage automatic control valve 43 of the ice machine inlet buffer with cold recovery of the utility model are purchased on the market. The technicians in this industry only need to install and operate them according to the accompanying instruction manual without the need for the technicians in this field to make creative efforts.

[0021] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An ice machine inlet buffer with cold recovery, characterized in that: The invention comprises a buffer body (1), a heat exchanger assembly (2), a demister assembly (3) and an automatic sewage discharge assembly (4); the heat exchanger assembly (2) is installed in the middle of the buffer body (1); the demister assembly (3) is installed above the inside of the buffer body (1); the lower part of the buffer body (1) is connected to an ammonia inlet assembly (5); the top of the buffer body (1) is connected to an ammonia outlet assembly (6); and the automatic sewage discharge assembly (4) is installed at the bottom of the buffer body (1).

2. The ice machine inlet buffer with cold recovery as claimed in claim 1, characterized in that: The buffer body (1) is composed of a straight cylindrical cavity (11), an upper sealing head (12) and a lower sealing head (13); the straight cylindrical cavity (11) is connected to the upper sealing head (12) and the lower sealing head (13) by welding.

3. The ice machine inlet buffer with cold recovery as claimed in claim 1, characterized in that: The heat exchanger assembly (2) comprises a circulating water booster pump (21), a heat exchange coil (22), a circulating water inlet valve group (23) and a circulating water outlet valve group (24); the heat exchange coil (22) is located in the middle of the buffer body (1), the input end of the heat exchange coil (22) is equipped with a circulating water booster pump (21), and the inlet and outlet of the heat exchange coil (22) are respectively equipped with a circulating water inlet valve group (23) and a circulating water outlet valve group (24).

4. The ice machine inlet buffer with cold recovery as claimed in claim 3, characterized in that: The heat exchange coil (22) adopts a serpentine coil structure.

5. The ice machine inlet buffer with cold recovery as claimed in claim 1, characterized in that: The separation filler of the demister assembly (3) adopts a wire mesh structure.

6. The ice machine inlet buffer with cold recovery as claimed in claim 1, characterized in that: The automatic sewage discharge assembly (4) comprises a liquid level meter (41), a sewage discharge root valve (42) and a sewage discharge automatic control valve (43); the liquid level meter (41) is installed at the lower front end of the buffer body (1); the bottom of the buffer body (1) is connected to a sewage discharge pipe, and the sewage discharge root valve (42) and the sewage discharge automatic control valve (43) are installed on the sewage discharge pipe.

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