Flue gas purification device of vertical carbon waste heat boiler

Abstract

The utility model relates to the technology of industrial equipment, and discloses a flue gas purification device of a vertical carbon waste heat boiler, which is characterized in that a gas inlet pipe is arranged on one side of a purification box, ozone sterilization equipment and a flue gas heat exchanger are arranged on the gas inlet pipe, a primary filter is arranged at the lower part in the purification box, a secondary filter is arranged above the primary filter, and a secondary filter is arranged above the secondary filter. Drying equipment is mounted between the primary filter and the secondary filter, a water tank is arranged outside the purifying box and communicated with the purifying box through a water conveying pipe, a spray head is mounted at one end, located in the purifying box, of the water conveying pipe, a circulating pump is mounted on the water conveying pipe, and the purifying box is connected with the water tank through a liquid outlet pipe; a smoke outlet is formed in the upper portion of the purification box, and a sewage draining exit, a first-stage filter, a second-stage filter and spraying equipment are arranged below the purification box, so that the content of pollutants in smoke is effectively reduced, the atmospheric environment and the health of people are protected, energy recycling is achieved through the smoke heat exchanger and the waste heat recovery equipment, and the purposes of environmental protection and energy saving are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial equipment, and more specifically, particularly to a flue gas purification device for a vertical carbon waste heat boiler. Background Art

[0002] In order to improve energy efficiency, reduce production costs and reduce environmental pollution, process waste heat recovery boilers have been widely used in the carbon industry. The waste heat generated in the production process has begun to be utilized, but the industry is still a high-energy consumption and high-pollution industry. A large amount of high-temperature waste heat cannot be fully utilized, resulting in a great waste of energy. At the same time, due to the high flue gas temperature, it is difficult to carry out flue gas dust removal and purification. Therefore, it is an inevitable development trend for production enterprises to invest in waste heat boilers to recover energy and effectively purify flue gas.

[0003] In the prior art, the boiler will generate steam and flue gas during the process of heating materials, and these steam and flue gas will be accompanied by dust, impurities, sulfur dioxide gas and hydrogen sulfide gas. If the steam and flue gas are directly discharged into the environment, it will pollute the air in the environment, which is not good for people's health. Therefore, a flue gas purification device for a vertical carbon waste heat boiler is needed to solve the above-mentioned problems. Utility Model Content

[0004] The present application provides a flue gas purification device for a vertical carbon waste heat boiler, which solves the problem that the steam and flue gas generated by the boiler during the material heating process are accompanied by dust, impurities, sulfur dioxide gas and hydrogen sulfide gas. If the steam and flue gas are directly discharged into the environment, they will pollute the air in the environment and be detrimental to people's health.

[0005] The present application provides a flue gas purification device for a vertical carbon waste heat boiler, comprising a purification box, an air intake pipe is installed on one side of the purification box, an ozone sterilization device and a flue gas heat exchanger are installed on the air intake pipe, a primary filter is installed at the lower part of the purification box, a secondary filter is provided above the primary filter, a drying device is installed between the primary filter and the secondary filter, a water tank is provided outside the purification box, the water tank is connected to the purification box through a water pipe, a spray head is installed at one end of the water pipe located in the purification box, a circulating pump is installed on the water pipe, the purification box is connected to the water tank through a liquid outlet pipe, a filter is provided at one end of the liquid outlet pipe connected to the purification box, a smoke exhaust port is provided above the purification box, and a sewage outlet is provided below the purification box.

[0006] Preferably, the ozone sterilization equipment consists of a housing and an ozone generator.

[0007] Preferably, the flue gas heat exchanger is connected to a waste heat recovery device via a pipeline.

[0008] Preferably, the primary filter is located above the air inlet.

[0009] Preferably, the spray head is located between the primary filter and the drying equipment.

[0010] Preferably, the water tank is provided with a liquid level sensor and a concentration detector.

[0011] Preferably, a liquid replenishing port is provided on one side of the water tank, and a liquid draining port is provided at the bottom of the water tank.

[0012] Preferably, a replacement port is provided at the bottom of the purification box, and the replacement port is located at the lower end of the filter screen.

[0013] Preferably, a manhole is provided on the purification box.

[0014] It can be seen from the above technical scheme that the present application provides a flue gas purification device for a vertical carbon waste heat boiler. When in use, the flue gas generated in the boiler is passed into the purification box through the air intake pipe. The ozone sterilization equipment installed on the air intake pipe can enable the flue gas and ozone entering the outer shell to fully contact, thereby fully eliminating the bacteria in the flue gas. After the flue gas comes out of the ozone sterilization equipment, it enters the flue gas heat exchanger on the air intake pipe, and the heat of the flue gas is used to heat the internal low-temperature working liquid (working medium) in the flue gas heat exchanger, and then enters the waste heat recovery equipment through the pipeline for waste heat recovery and then transfers the heat to the boiler water. The flue gas after heat exchange enters the purification box from the air intake port, and the flue gas moves from the bottom to the top in the purification box through the first-stage filter. The first-stage filter is filled with porous fillers, which filter out the granular dust in the flue gas and block it under the first-stage filter, and discharge it from the sewage outlet for treatment. The circulating pump draws the alkaline solution in the water tank through the water pipe and sprays it from the spray head in the purification box. The porous filler can make the flue gas fully contact with the alkaline solution sprayed from the sprinkler head, and treat the sulfur dioxide gas and hydrogen sulfide gas in the flue gas. The solution after spraying enters the water tank from the liquid outlet pipe for continuous recycling. The liquid level sensor and concentration detector on the water tank monitor the solution in the water tank in real time. When the solution level in the water tank reaches 80% or the solution concentration is saturated, it is discharged from the drain port for treatment. When the liquid level in the water tank 15 is low, the alkaline solution is replenished from the replenishment port to the water tank. The desulfurized flue gas contains a large amount of water vapor. In order to prevent water vapor from affecting the adsorption efficiency of the organic filter material in the secondary filter, a drying device is set between the primary filter and the secondary filter to dry the water vapor in the flue gas. The flue gas filtered by the primary filter is dried by the drying device and enters the secondary filter. Substances that are difficult to dissolve in water can be adsorbed by the organic filter material in the secondary filter. The flue gas filtered by the secondary filter is discharged through the exhaust port.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model is provided with a primary filter, a secondary filter and a spraying device, which can effectively reduce the pollutant content in the flue gas and protect the atmospheric environment and people's health.

[0017] 2. The utility model is provided with a flue gas heat exchanger and waste heat recovery equipment to realize energy recycling and achieve the purpose of environmental protection and energy saving.

[0018] 3. The utility model sets a drying device between the primary filter and the secondary filter to dry the water vapor in the flue gas, which can prevent the water vapor from affecting the adsorption efficiency of the organic filter material in the secondary filter.

[0019] 4. The utility model provides a replacement port under the filter screen. When the filter screen is clogged and the solution does not flow smoothly, the filter screen can be replaced or repaired through the replacement port, which is convenient for operation and maintenance.

[0020] In summary, a flue gas purification device for a vertical carbon waste heat boiler is provided with a primary filter, a secondary filter and a spraying device, which can effectively reduce the content of pollutants in the flue gas, protect the atmospheric environment and people's health, and provide a flue gas heat exchanger and waste heat recovery equipment to realize the recycling of energy, while achieving the goals of environmental protection and energy saving. A drying device is provided between the primary filter and the secondary filter to dry the water vapor in the flue gas, which can prevent the water vapor from affecting the adsorption efficiency of the organic filter material in the secondary filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without inventiveness.

[0022] Figure 1 A schematic diagram of the structure of a flue gas purification device for a vertical carbon waste heat boiler provided by the utility model;

[0023] Figure 2 This is a partial schematic diagram of a flue gas purification device for a vertical carbon waste heat boiler provided by the utility model.

[0024] The reference numerals in the specific implementation manner are as follows:

[0025] 1. Purification box; 2. Ozone sterilization equipment; 3. Shell; 4. Ozone generator; 5. Air inlet pipe; 6. Flue gas heat exchanger; 7. Waste heat recovery equipment; 8. Air inlet; 9. Primary filter; 10. Pores; 11. Sprinkler head; 12. Drying equipment; 13. Secondary filter; 14. Water pipe; 15. Water tank; 16. Circulation pump; 17. Liquid level sensor; 18. Concentration detector; 19. Smoke outlet; 20. Liquid outlet; 21. Filter; 22. Replacement port; 23. Sewage outlet; 24. Liquid replenishment port; 25. Liquid discharge port; 26. Manhole. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0027] See also Figure 1-2, a flue gas purification device for a vertical carbon waste heat boiler. In order to solve the problem that the steam and flue gas generated by the boiler during the material heating process are accompanied by dust, impurities, sulfur dioxide gas and hydrogen sulfide gas, if the steam and flue gas are directly discharged into the environment, the air in the environment will be polluted, which is not conducive to people's health. A flue gas purification device for a vertical carbon waste heat boiler is proposed, which is provided with a primary filter, a secondary filter and a spraying device to effectively reduce the pollutant content in the flue gas, protect the atmospheric environment and people's health, and provide a flue gas heat exchanger and a waste heat recovery device to realize the reuse of energy and achieve the purpose of environmental protection and energy saving at the same time. A drying device is provided between the primary filter and the secondary filter to dry the water vapor in the flue gas, so as to prevent the water vapor from affecting the adsorption efficiency of the organic filter material in the secondary filter. Specifically, a flue gas purification device for a vertical carbon waste heat boiler includes a purification box 1, an air intake pipe 5 is installed on one side of the purification box 1, an ozone sterilization device 2 and a flue gas heat exchanger 6 are installed on the air intake pipe 5, the ozone sterilization device 2 is composed of a shell 3 and an ozone generator 4, the flue gas heat exchanger 6 is connected to a waste heat recovery device 7 through a pipeline, the flue gas generated in the boiler is passed into the purification box 1 through the air intake pipe 5, the ozone sterilization device 2 installed on the air intake pipe 5 can make the flue gas entering the shell 3 and the ozone fully contact, thereby fully eliminating the bacteria in the flue gas, and the flue gas comes out of the ozone sterilization device 2 and enters the flue gas heat exchanger 6 on the air intake pipe 5, and is heated by the heat of the flue gas. The internal low-temperature working liquid (working fluid) in the flue gas heat exchanger 6 enters the waste heat recovery device 7 through a pipeline for waste heat recovery and then transfers the heat to the boiler water. The flue gas heat exchanger 6 and the waste heat recovery device 7 are set to realize the reuse of energy and achieve the purpose of environmental protection and energy saving. A primary filter 9 is installed at the lower part of the purification box 1. The primary filter 9 is located above the air inlet 8. The flue gas that has undergone heat exchange enters the purification box 1 from the air inlet 8. The flue gas moves from bottom to top in the purification box 1 through the primary filter 9. The primary filter 9 is filled with porous fillers, which filter the granular dust in the flue gas and block it below the primary filter 9, and discharge it from the sewage outlet 23 for treatment.

[0028] A secondary filter 13 is provided above the primary filter 9, a drying device 12 is installed between the primary filter 9 and the secondary filter 13, a water tank 15 is provided outside the purification box 1, the water tank 15 is connected to the purification box 1 through a water pipe 14, a spray head 11 is installed at one end of the water pipe 14 located in the purification box 1, the spray head 11 is located between the primary filter 9 and the drying device 12, the flue gas after desulfurization contains a large amount of water vapor, in order to prevent the water vapor from affecting the adsorption efficiency of the organic filter material in the secondary filter 13, a drying device 12 is provided between the primary filter 9 and the secondary filter 13 to dry the water vapor in the flue gas, a circulating pump 16 is installed on the water pipe 14, the purification box 1 is connected to the water tank 15 through a liquid outlet pipe 20, a liquid level sensor 17 and a concentration detector 18 are provided on the water tank 15, a liquid replenishing port 24 is provided on one side of the water tank 15, and a The drain port 25 and the circulating pump 16 draw out the alkaline solution in the water tank 15 through the water pipe 14 and spray it out from the spray head 11 in the purification box 1. The porous filler filled in the primary filter 9 can make the flue gas fully contact with the alkaline solution sprayed from the spray head 11, so as to treat the sulfur dioxide gas and hydrogen sulfide gas in the flue gas. The sprayed solution enters the water tank 15 from the liquid outlet pipe 20 for continuous recycling. The liquid level sensor 17 and the concentration detector 18 on the water tank 15 monitor the solution in the water tank 15 in real time. When the liquid level of the solution in the water tank 15 reaches 80% or the concentration of the solution is saturated, it is discharged from the drain port 25 for treatment. When the liquid level in the water tank 15 is low, the alkaline solution is replenished to the water tank 15 from the replenishing port 24. The arrangement of the primary filter 9, the secondary filter 13 and the spraying equipment can effectively reduce the pollutant content in the flue gas and protect the atmospheric environment and people's health.

[0029] A filter screen 21 is provided at one end of the liquid outlet pipe 20 connected to the purification box 1, and a replacement port 22 is provided at the bottom of the purification box 1. The replacement port 22 is located at the lower end of the filter screen 21, and the replacement port 22 is set below the filter screen 21. When the filter screen 21 is blocked and the solution does not flow smoothly, the filter screen 21 is replaced or repaired from the replacement port 22, which is convenient for operation and maintenance. A smoke exhaust port 19 is provided above the purification box 1, and a sewage outlet 23 is provided below the purification box 1. The flue gas filtered by the primary filter 9 is dried by the drying equipment 12 and then enters the secondary filter 13. Substances that are difficult to dissolve in water can be adsorbed by the organic filter material in the secondary filter 13, and the flue gas filtered by the secondary filter 13 is discharged through the smoke exhaust port 19. A manhole 26 is provided on the purification box 1, which is convenient for maintenance when the purification box 1 fails.

[0030] It can be seen from the above technical scheme that a flue gas purification device for a vertical carbon waste heat boiler will generate some wastes such as flue gas during the operation of the boiler. These wastes need to be treated and discharged to minimize the impact on the environment. When a flue gas purification device for a vertical carbon waste heat boiler is in use, the flue gas generated in the boiler is passed into the purification box 1 through the air inlet pipe 5. The ozone sterilization device 2 installed on the air inlet pipe 5 can make the flue gas entering the shell 3 and the ozone fully contact, thereby fully eliminating the bacteria in the flue gas. After the flue gas comes out of the ozone sterilization device 2, it enters the air inlet pipe 5. The flue gas heat exchanger 6 on the pipe 5 uses the heat of the flue gas to heat the internal low-temperature working liquid (working medium) in the flue gas heat exchanger 6, and then enters the waste heat recovery device 7 through the pipeline for waste heat recovery and then transfers the heat to the boiler water. The flue gas after heat exchange enters the purification box 1 from the air inlet 8. The flue gas moves from bottom to top in the purification box 1 through the primary filter 9. The primary filter 9 is filled with porous fillers to filter and block the granular dust in the flue gas below the primary filter 9, and is discharged from the sewage outlet 23 for treatment. The circulating pump 16 transfers the alkaline solution in the water tank 15 through the water pipe 1 4 is drawn out from the spray head 11 in the purification box 1. The porous filler filled in the primary filter 9 can make the flue gas fully contact with the alkaline solution sprayed from the spray head 11, and treat the sulfur dioxide gas and hydrogen sulfide gas in the flue gas. The sprayed solution enters the water tank 15 from the liquid outlet pipe 20 for continuous recycling. The liquid level sensor 17 and the concentration detector 18 on the water tank 15 monitor the solution in the water tank 15 in real time. When the liquid level of the solution in the water tank 15 reaches 80% or the concentration of the solution is saturated, it is discharged from the drain port 25 for treatment. When the liquid level in the water tank 15 reaches 80% or the concentration of the solution is saturated, it is discharged from the drain port 25 for treatment. When the temperature is low, alkaline solution is replenished to the water tank 15 from the liquid replenishment port 24. The flue gas after desulfurization contains a large amount of water vapor. In order to prevent the water vapor from affecting the adsorption efficiency of the organic filter material in the secondary filter 13, a drying device 12 is arranged between the primary filter 9 and the secondary filter 13 to dry the water vapor in the flue gas. The flue gas filtered by the primary filter 9 is dried by the drying device 12 and then enters the secondary filter 13. Substances that are difficult to dissolve in water can be adsorbed by the organic filter material in the secondary filter 13. The flue gas filtered by the secondary filter 13 is discharged through the exhaust port 19.

[0031] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the application disclosed herein. The present invention is intended to cover any variation, use or adaptation of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the art disclosed by the present invention. The specification and examples are to be regarded as exemplary only, and the true scope of the present invention is indicated by the claims.

[0032] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present invention do not constitute a limitation on the scope of protection of the present invention.

Claims

1. A flue gas purification device for a vertical carbon waste heat boiler, characterized in that: The invention comprises a purification box (1), an air inlet pipe (5) is installed on one side of the purification box (1), an ozone sterilization device (2) and a flue gas heat exchanger (6) are installed on the air inlet pipe (5), a primary filter (9) is installed at the lower part of the purification box (1), a secondary filter (13) is installed above the primary filter (9), a drying device (12) is installed between the primary filter (9) and the secondary filter (13), a water tank (15) is installed outside the purification box (1), and the water tank (15) is connected to the air inlet pipe (5) through the air inlet pipe (5). The water pipe (14) is connected to the purification box (1), and a sprinkler head (11) is installed at one end of the water pipe (14) located in the purification box (1). A circulation pump (16) is installed on the water pipe (14). The purification box (1) is connected to the water tank (15) through a liquid outlet pipe (20), and a filter net (21) is provided at one end of the liquid outlet pipe (20) connected to the purification box (1). A smoke exhaust port (19) is provided above the purification box (1), and a sewage outlet (23) is provided below the purification box (1).

2. The flue gas purification device for a vertical carbon waste heat boiler according to claim 1 is characterized in that: The ozone sterilization equipment (2) is composed of a housing (3) and an ozone generator (4).

3. The flue gas purification device for a vertical carbon waste heat boiler according to claim 1 is characterized in that: The flue gas heat exchanger (6) is connected to a waste heat recovery device (7) via a pipeline.

4. The flue gas purification device for a vertical carbon waste heat boiler according to claim 1 is characterized in that: The primary filter (9) is located above the air inlet (8).

5. The flue gas purification device for a vertical carbon waste heat boiler according to claim 1, characterized in that: The spray head (11) is located between the primary filter (9) and the drying device (12).

6. The flue gas purification device for a vertical carbon waste heat boiler according to claim 1, characterized in that: The water tank (15) is provided with a liquid level sensor (17) and a concentration detector (18).

7. The flue gas purification device for a vertical carbon waste heat boiler according to claim 1 is characterized in that: A liquid replenishing port (24) is provided on one side of the water tank (15), and a liquid draining port (25) is provided at the bottom of the water tank (15).

8. The flue gas purification device for a vertical carbon waste heat boiler according to claim 1, characterized in that: The bottom of the purification box (1) is provided with a replacement port (22), and the replacement port (22) is located at the lower end of the filter screen (21).

9. The flue gas purification device for a vertical carbon waste heat boiler according to claim 1, characterized in that: The purification box (1) is provided with a manhole (26).

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