Waste heat recovery equipment for tail gas purification in sodium carbonate process

Abstract

The utility model relates to the technical field of tail gas purification and waste heat recovery in alkali production, in particular to tail gas purification and waste heat recovery equipment for a sodium carbonate process, which comprises a base, one side of the base is fixedly connected with a cyclone separator, and the top of the cyclone separator is fixedly connected with an exhaust pipe. When the waste heat recovery equipment for purifying the tail gas in the sodium carbonate process is used, the circulating pump is arranged on one side of the absorption tower, the storage tank is arranged on one side of the circulating pump, and the storage tank is connected with the circulating pump through the connecting pipe; the circulating pump can convey the absorption liquid to the absorption tower through the circulating pipe, the water inlet is formed in the top of the absorption tower, the absorption liquid in the circulating pipe can be conveyed into the absorption tower through the water inlet to be purified, and the water outlet is formed in the bottom of the absorption tower. And the used absorption liquid is conveyed into the circulating pump through the water outlet to be circularly purified, so that the effect of circulating the absorption liquid is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery after purification of tail gas in alkali production, in particular to waste heat recovery equipment for tail gas purification in soda ash process. Background Art

[0002] The waste heat recovery device for tail gas purification in the production of soda ash is an industrial equipment specially used to treat the tail gas generated in the production process of soda ash. The core purpose of this device is to remove harmful substances in the tail gas, such as sulfur dioxide, nitrogen oxides and particulate matter, through physical and chemical methods, and to recover the waste heat resources in the tail gas to achieve the dual goals of environmental protection and energy utilization.

[0003] The utility model disclosed in the Chinese utility model patent application disclosure CN219390658U discloses a waste heat recovery device for tail gas purification in soda ash process, which belongs to the technical field of waste heat recovery of tail gas purification in soda ash production, and is characterized in that: a group of transparent elbows and water inlet pipes I are respectively installed on the sides of the heat exchange water tank, a flange pipe is installed at the bottom of the heat exchange water tank, a manual valve and an electric valve are respectively installed on the flange pipe, the flange pipe is fixedly connected to the heat exchange device, and the heat exchange device is fixedly installed on the supporting platform. The technical problem of directly passing ammonia-containing tail gas into water, which leads to direct loss of heat energy and energy waste, is solved, and it is mainly used in the waste heat recovery of tail gas purification in soda ash production.

[0004] However, the device lacks the function of exhaust gas pretreatment. When the exhaust gas enters the absorption tower, there is no pretreatment system. The dust, particulate matter and other impurities in the exhaust gas directly enter the absorption tower or other purification equipment, which may cause the packing or nozzle to be blocked, affecting the mass transfer efficiency. At the same time, these impurities may also accelerate the wear of the equipment, shorten its service life, and cause the absorption tower to be blocked. Not only that, the device also lacks the function of circulating the absorption liquid. During the process of purifying the exhaust gas, if there is no circulation function, the absorption liquid will not be able to continuously contact the exhaust gas, resulting in a significant decrease in the absorption efficiency. Moreover, more fresh absorption liquid is required to process a certain amount of exhaust gas, which increases costs and may also lead to excessive consumption of the absorption liquid, resulting in a decrease in the absorption efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a waste heat recovery device for tail gas purification in a soda ash process to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A waste heat recovery device for purifying tail gas from a soda ash process comprises a base, a cyclone separator is fixedly connected to one side of the base, an exhaust pipe is fixedly connected to the top of the cyclone separator, a collecting bucket is fixedly connected to the bottom of the exhaust pipe, an air inlet pipe is fixedly connected to one side of the cyclone separator, a dust exhaust pipe is fixedly connected to the bottom of the cyclone separator, an exhaust pipe is fixedly connected to one end of an absorption tower, an air inlet pipe is fixedly connected to the bottom of the absorption tower, a water inlet is provided on one side of the top of the absorption tower, a water outlet is provided on one side of the bottom of the absorption tower, one end of the water inlet is fixedly connected to a circulation pipe, one end of the circulation pipe is fixedly connected to a circulation pump, one side of the circulation pump is fixedly connected to a connecting pipe, one end of the connecting pipe is fixedly connected to a storage tank, and one side of the absorption tower is fixedly connected to a heat exchange water tank.

[0008] Preferably, a filling layer is fixedly connected inside the absorption tower, a spray head is fixedly connected to the top of the filling layer, and a demisting layer is fixedly connected to the top of the spray head.

[0009] Preferably, an exhaust port is provided at the top of the absorption tower, a transmission pipe is fixedly connected to the top of the exhaust port, and a heat exchange water tank is fixedly connected to one end of the transmission pipe.

[0010] Preferably, a sampling cover is rotatably connected to one side of the top of the absorption tower, and an observation mirror is fixedly connected to the top of the sampling cover.

[0011] Preferably, a transmission pipe is fixedly connected to one side of the heat exchange water tank, and a discharge pipe is fixedly connected to one side of the heat exchange water tank.

[0012] Preferably, a fixing ring is fixedly connected to the bottom of the absorption tower, and a supporting column is fixedly connected to the bottom of the fixing ring.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. This is a waste heat recovery device for purifying tail gas in soda ash process. When in use, a cyclone separator is installed on one side of the base. After the tail gas enters the cyclone separator from the air inlet pipe, the tail gas will form a rotating flow inside the cyclone separator. Solid particles are thrown on the inner wall of the cyclone separator under the action of centrifugal force. After these solid particles hit the inner wall of the cyclone separator, they will slide along the inner wall due to gravity and be discharged from the dust exhaust pipe at the bottom of the cyclone separator. The discharged particles will be collected by the collecting bucket installed at the bottom of the cyclone separator, and the cleaned tail gas will be discharged from the exhaust pipe connected to the top of the cyclone separator to the next link, thereby achieving the effect of tail gas pretreatment.

[0015] 2. This is a waste heat recovery equipment for tail gas purification in soda ash process. When in use, a circulation pump is installed on one side of the absorption tower, and a storage tank is installed on one side of the circulation pump. The storage tank is connected to the circulation pump through a connecting pipe. After the storage tank transmits the absorption liquid to the circulation pump, the circulation pump will transmit the absorption liquid to the absorption tower through the circulation pipe. A water inlet is opened at the top of the absorption tower, and the absorption liquid in the circulation pipe can be transmitted into the absorption tower for purification through the water inlet. A water outlet is opened at the bottom of the absorption tower, and the used absorption liquid is transmitted to the circulation pump through the water outlet for circulation purification, thereby achieving the effect of absorption liquid circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall appearance structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the appearance structure of the absorption tower of the utility model;

[0018] Figure 3 This is a schematic diagram of the appearance structure of the cyclone separator of the utility model;

[0019] Figure 4 It is a schematic diagram of the internal structure of the absorption tower of the utility model.

[0020] In the figure: 1. base; 2. cyclone separator; 3. exhaust pipe; 4. collecting bucket; 5. air inlet pipe; 6. dust exhaust pipe; 7. absorption tower; 8. water inlet; 9. water outlet; 10. circulation pipe; 11. circulation pump; 12. connecting pipe; 13. storage tank; 14. heat exchange water tank; 15. filling layer; 16. spray head; 17. demisting layer; 18. exhaust port; 19. sampling cover; 20. observation mirror; 21. transmission pipe; 22. discharge pipe; 23. fixing ring; 24. support column. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 4 As shown, a technical solution provided by the utility model:

[0023] A waste heat recovery device for tail gas purification in a soda ash process comprises a base 1, a cyclone separator 2 is fixedly connected to one side of the base 1, an exhaust pipe 3 is fixedly connected to the top of the cyclone separator 2, a collecting bucket 4 is fixedly connected to the bottom of the exhaust pipe 3, an air inlet pipe 5 is fixedly connected to one side of the cyclone separator 2, a dust exhaust pipe 6 is fixedly connected to the bottom of the cyclone separator 2, an absorption tower 7 is fixedly connected to one end of the exhaust pipe 3, an air inlet pipe 5 is fixedly connected to the bottom of the absorption tower 7, a water inlet 8 is provided on one side of the top of the absorption tower 7, a water outlet 9 is provided on one side of the bottom of the absorption tower 7, and one end of the water inlet 8 is fixedly connected to the bottom of the absorption tower 7. A circulation pipe 10 is connected, one end of the circulation pipe 10 is fixedly connected to a circulation pump 11, one side of the circulation pump 11 is fixedly connected to a connecting pipe 12, one end of the connecting pipe 12 is fixedly connected to a storage tank 13, and one side of the absorption tower 7 is fixedly connected to a heat exchange water tank 14. When in use, a cyclone separator 2 is installed on one side of the base 1. After the exhaust gas enters the cyclone separator 2 from the intake pipe 5, the exhaust gas will form a rotating flow inside the cyclone separator 2. Solid particles are thrown onto the inner wall of the cyclone separator 2 under the action of centrifugal force. When these solid particles collide with the cyclone separator 2, the exhaust gas will form a rotating flow inside the cyclone separator 2. After the exhaust gas reaches the inner wall of the cyclone separator 2, it will slide down along the inner wall due to gravity and be discharged from the dust exhaust pipe 6 at the bottom of the cyclone separator 2. The discharged particles will be collected by the collecting bucket 4 installed at the bottom of the cyclone separator 2. The cleaned exhaust gas will be discharged from the exhaust pipe 3 connected to the top of the cyclone separator 2 and enter the next link. One end of the exhaust pipe 3 is connected to the absorption tower 7. A circulating pump 11 is installed on one side of the absorption tower 7. A storage tank 13 is installed on one side of the circulating pump 11. The storage tank 13 is connected to the circulating pump 11 through a connecting pipe 12. The storage tank 13 is connected to the circulating pump 11. After the absorption liquid is transmitted, the circulation pump 11 will transmit the absorption liquid to the absorption tower 7 through the circulation pipe 10. A water inlet 8 is provided at the top of the absorption tower 7, through which the absorption liquid in the circulation pipe 10 can be transmitted to the absorption tower 7 for purification. A water outlet 9 is provided at the bottom of the absorption tower 7, through which the used absorption liquid is transmitted to the circulation pump 11 for circulation purification. A heat exchange water tank 14 is installed on one side of the absorption tower 7, through which the waste heat of the tail gas can be recovered, so as to achieve the function of tail gas purification and waste heat recovery.

[0024] In this embodiment, preferably, a packing layer 15 is fixedly connected inside the absorption tower 7, a spray head 16 is fixedly connected to the top of the packing layer 15, and a demisting layer 17 is fixedly connected to the top of the spray head 16. When in use, the packing layer 15 is connected inside the absorption tower 7, and the contact area between the gas and the liquid can be increased through the packing layer 15, and the contact opportunity between the harmful substances in the tail gas and the absorption liquid is increased, thereby improving the purification efficiency. The spray head 16 is installed on the top of the packing layer 15, and the absorption liquid can be evenly sprayed on the packing layer 15 through the spray head 16. The demisting layer 17 is connected to the top of the spray head 16, and the water droplets in the tail gas can be removed through the demisting layer 17, so as to achieve the purification effect;

[0025] In this embodiment, preferably, an exhaust port 18 is provided at the top of the absorption tower 7, a transmission pipe 21 is fixedly connected to the top of the exhaust port 18, and one end of the transmission pipe 21 is fixedly connected to the heat exchange water tank 14. When in use, the exhaust port 18 is provided at the top of the absorption tower 7, and the purified tail gas can be discharged from the absorption tower 7 through the exhaust port 18. The discharged tail gas is transmitted to the heat exchange water tank 14 through the transmission pipe 21 connected to the exhaust port 18, which has achieved the function of purifying the tail gas transmission;

[0026] In this embodiment, preferably, a sampling cover 19 is rotatably connected to one side of the top of the absorption tower 7, and an observation mirror 20 is fixedly connected to the top of the sampling cover 19. When in use, the sampling cover 19 is installed on one side of the absorption tower 7, and the purified tail gas can be sampled and tested through the sampling cover 19 to analyze whether the tail gas meets the discharge standard. The observation mirror 20 is installed on the top of the sampling cover 19, and the situation in the absorption tower 7 can be monitored in real time through the observation mirror 20, which has achieved the purpose of sampling and observation;

[0027] In this embodiment, preferably, a transmission pipe 21 is fixedly connected to one side of the heat exchange water tank 14, and a discharge pipe 22 is fixedly connected to one side of the heat exchange water tank 14. When in use, the transmission pipe 21 is installed on one side of the heat exchange water tank 14, and the purified exhaust gas can be transmitted to the heat exchange water tank 14 through the transmission pipe 21 for waste heat recovery. The discharge pipe 22 is connected to one side of the heat exchange water tank 14, and the cooled gas can be discharged into the atmosphere through the discharge pipe 22, thereby achieving the function of discharging gas.

[0028] In this embodiment, preferably, a fixing ring 23 is fixedly connected to the bottom of the cyclone separator 2, and a support column 24 is fixedly connected to the bottom of the fixing ring 23. When in use, the absorption tower 7 is installed on the top of the fixing ring 23, and the support column 24 is connected to the bottom of the fixing ring 23. The cyclone separator 2 is fixed by the support column 24, thereby achieving the effect of fixing the cyclone separator 2.

[0029] When the exhaust gas purification and waste heat recovery equipment for soda ash process of the present embodiment is in use, a cyclone separator 2 is installed on one side of the base 1. After the exhaust gas enters the cyclone separator 2 from the air inlet pipe 5, the exhaust gas will form a rotating flow inside the cyclone separator 2. The solid particles are thrown onto the inner wall of the cyclone separator 2 under the action of centrifugal force. After these solid particles hit the inner wall of the cyclone separator 2, they will slide along the inner wall due to the action of gravity and be discharged from the dust exhaust pipe 6 at the bottom of the cyclone separator 2. The discharged particles will be collected by the collecting bucket 4 installed at the bottom of the cyclone separator 2, and the cleaned exhaust gas will be discharged from the exhaust pipe 3 connected to the top of the cyclone separator 2 to the next link, thereby achieving the effect of exhaust gas pretreatment. The waste heat recovery equipment for tail gas purification in soda ash process, when in use, is provided with a circulation pump 11 on one side of an absorption tower 7, and a storage tank 13 is provided on one side of the circulation pump 11, and the storage tank 13 is connected to the circulation pump 11 through a connecting pipe 12, after the storage tank 13 transmits the absorption liquid to the circulation pump 11, the circulation pump 11 transmits the absorption liquid to the absorption tower 7 through the circulation pipe 10, and a water inlet 8 is provided at the top of the absorption tower 7, through which the absorption liquid in the circulation pipe 10 can be transmitted into the absorption tower 7 for purification, and a water outlet 9 is provided at the bottom of the absorption tower 7, through which the used absorption liquid is transmitted to the circulation pump 11 for circulation purification, thereby achieving the effect of absorption liquid circulation.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A waste heat recovery device for tail gas purification in a soda ash process, characterized in that: The invention comprises a base (1), one side of the base (1) is fixedly connected to a cyclone separator (2), the top of the cyclone separator (2) is fixedly connected to an exhaust pipe (3), the bottom of the exhaust pipe (3) is fixedly connected to a collecting bucket (4), one side of the cyclone separator (2) is fixedly connected to an air intake pipe (5), the bottom of the cyclone separator (2) is fixedly connected to a dust exhaust pipe (6), one end of the exhaust pipe (3) is fixedly connected to an absorption tower (7), the bottom of the absorption tower (7) is fixedly connected to an air intake pipe ( 5), a water inlet (8) is provided on one side of the top of the absorption tower (7), a water outlet (9) is provided on one side of the bottom of the absorption tower (7), one end of the water inlet (8) is fixedly connected to a circulation pipe (10), one end of the circulation pipe (10) is fixedly connected to a circulation pump (11), one side of the circulation pump (11) is fixedly connected to a connecting pipe (12), one end of the connecting pipe (12) is fixedly connected to a storage tank (13), and one side of the absorption tower (7) is fixedly connected to a heat exchange water tank (14).

2. The waste heat recovery equipment for tail gas purification in soda ash process according to claim 1, characterized in that: A filling layer (15) is fixedly connected inside the absorption tower (7), a spray head (16) is fixedly connected to the top of the filling layer (15), and a demisting layer (17) is fixedly connected to the top of the spray head (16).

3. The waste heat recovery equipment for tail gas purification in soda ash process according to claim 1, characterized in that: An exhaust port (18) is provided at the top of the absorption tower (7), a transmission pipe (21) is fixedly connected to the top of the exhaust port (18), and a heat exchange water tank (14) is fixedly connected to one end of the transmission pipe (21).

4. The waste heat recovery equipment for tail gas purification in soda ash process according to claim 1, characterized in that: A sampling cover (19) is rotatably connected to one side of the top of the absorption tower (7), and an observation mirror (20) is fixedly connected to the top of the sampling cover (19).

5. The waste heat recovery equipment for tail gas purification in soda ash process according to claim 1, characterized in that: A transmission pipe (21) is fixedly connected to one side of the heat exchange water tank (14), and a discharge pipe (22) is fixedly connected to one side of the heat exchange water tank (14).

6. The waste heat recovery equipment for tail gas purification in soda ash process according to claim 1, characterized in that: A fixing ring (23) is fixedly connected to the bottom of the absorption tower (7), and a supporting column (24) is fixedly connected to the bottom of the fixing ring (23).

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