Flue gas separation device for boiler

Abstract

The utility model discloses a flue gas separation device for a boiler, which comprises a flue gas cooling pipe and a flue gas filter pipe, the flue gas cooling pipe is a Venturi jet device, a working gas access pipe and a flue gas inlet pipe are arranged on the flue gas cooling pipe, and the other end of the flue gas cooling pipe is connected with a flue gas filter pipe flange; a cooling throat pipe is arranged in the flue gas cooling pipe, a narrow pipe part is arranged in the middle of the cooling throat pipe, and cooling fins are arranged on the inner wall of the narrow pipe part; a filter element is arranged in the smoke filter pipe; kiln smoke is cooled through the cooling fins and then filtered and discharged through the filter element. The flue gas of the kiln passes through the flue gas separation device, so that the temperature of the flue gas can be reduced, impurity particles in the flue gas can be filtered, and negative effects on people and environmental pollution are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of kiln smoke exhaust equipment, and in particular relates to a smoke separation device for a boiler. Background Art

[0002] The rotary kiln is an important equipment for the incineration of hazardous waste. Its internal temperature is above 1200℃ during normal operation. Flue gas will be generated during the incineration process. The flue gas generated by the kiln is not only high in temperature, but also contains many substances that affect human health and pollute the environment. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems and provide a flue gas separation device for a boiler.

[0004] A flue gas separation device for a boiler comprises: a flue gas cooling pipe 1 and a flue gas filtering pipe 2. The flue gas cooling pipe 1 is a venturi ejector. A working gas access pipe 11 and a smoke inlet pipe 13 are arranged on the flue gas cooling pipe 1. The other end of the flue gas cooling pipe 1 is flange-sealed with the flue gas filtering pipe 2. A cooling throat 14 is arranged in the flue gas cooling pipe 1. A narrow tube portion 141 is arranged in the middle of the cooling throat 14. Cooling fins 142 are arranged on the inner wall of the narrow tube portion 141. A filter element 23 is arranged in the flue gas filtering pipe 2. The kiln flue gas is cooled by the cooling fins 142 and then filtered and discharged through the filter element 23.

[0005] The flue gas cooling pipe 1 is provided with a working gas inlet pipe 11, a drainage chamber 12, a smoke inlet pipe 13, a cooling throat 14, a cooling fluid chamber 15, and a diffusion tube 16; the working gas inlet pipe 11, the drainage chamber 12, the cooling throat 14 and the diffusion tube 16 are connected in sequence.

[0006] The working gas access pipe 11 is arranged at one end of the flue gas cooling pipe 1; one end of the working gas access pipe 11 is a working gas inlet 111, and the working gas inlet 111 is provided with a flange, and high-pressure working gas is connected to the flue gas cooling pipe 1 from the working gas inlet 111; the other end of the working gas access pipe 11 is provided with a nozzle opening 112; the nozzle opening 112 is arranged in the drainage chamber 12; the rear of the nozzle opening 112 in the drainage chamber 12 is a negative pressure chamber; a flange is provided at the front end of the smoke inlet pipe 13, and the smoke inlet pipe 13 is flange-connected to the kiln smoke exhaust port; the other end of the smoke inlet pipe 13 is provided with a smoke inlet 131, and the smoke inlet 131 is located at the negative pressure chamber in the drainage chamber 12.

[0007] The diameter of the nozzle opening 112 is smaller than the diameter of the working gas inlet 111;

[0008] The diameter of the narrow tube portion 141 is smaller than the diameter of the tube openings at both ends thereof.

[0009] The cooling fins 142 are aluminum double-helix heat sinks.

[0010] The cooling throat 14 is provided with a cooling fluid cavity 15 on its outer wall; the cooling fluid cavity 15 is provided with a liquid inlet 151 and a liquid outlet 152; the liquid inlet 151 and the liquid outlet 152 are connected to the cooling medium supply equipment pipeline.

[0011] A filter element limiting flange 21 is provided on the inner wall of one side of the smoke inlet of the smoke filter tube 2; a filter element abutment 22 is provided on one side of the smoke outlet of the smoke filter tube 2; and a filter element 23 is provided between the filter element limiting flange 21 and the filter element abutment 22.

[0012] The filter element 23 is provided with a plurality of filter capillaries 233 ; the plurality of filter capillaries 233 spirally penetrate the entire filter element 23 along their axis.

[0013] The filter element 23 is made of carbon fiber.

[0014] The technical scheme provides a flue gas separation device for a boiler, which comprises: a flue gas cooling pipe 1 and a flue gas filter pipe 2. The flue gas cooling pipe 1 is a venturi ejector. A working gas access pipe 11 and a smoke inlet pipe 13 are arranged on the flue gas cooling pipe 1. The other end of the flue gas cooling pipe 1 is flange-connected with the flue gas filter pipe 2. A cooling throat 14 is arranged in the flue gas cooling pipe 1. A narrow tube portion 141 is arranged in the middle of the cooling throat 14. Cooling fins 142 are arranged on the inner wall of the narrow tube portion 141. A filter element 23 is arranged in the flue gas filter pipe 2. The kiln flue gas is cooled by the cooling fins 142 and then filtered and discharged by the filter element 23. The kiln flue gas passes through the flue gas separation device, which can not only reduce the flue gas temperature, but also filter the impurity particles in the flue gas to avoid negative impact on people and environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall schematic diagram of a flue gas separation device for a boiler of the utility model;

[0016] Figure 2 This is a cross-sectional view of the internal structure of a flue gas separation device for a boiler according to the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of a flue gas cooling pipe of a flue gas separation device for a boiler of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of a flue gas filter tube of a flue gas separation device for a boiler of the utility model;

[0019] In the figure: 1. flue gas cooling pipe, 11. gas access pipe, 111. working gas inlet, 112. nozzle port, 12. drainage chamber, 13. smoke inlet pipe, 131. flue gas access port, 14. cooling throat, 141. narrow tube portion, 142. cooling fins, 15. cooling fluid chamber, 151. liquid inlet, 152. liquid discharge port, 16. diffusion tube, 2. flue gas filter tube, 21. filter element limiting flange, 22. filter element abutment, 23. filter element, 231. limiting sliding groove, 232. filter element handle, 233. filter capillary. DETAILED DESCRIPTION

[0020] The technical scheme will be further described clearly and completely below in conjunction with the accompanying drawings of the technical scheme. The described embodiments are only a part of the technical scheme, not all of the embodiments. Based on the technical scheme, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] Example 1

[0022] See also Figures 1 to 4 As shown, a flue gas separation device for a boiler comprises: a flue gas cooling pipe 1, a flue gas filtering pipe 2;

[0023] The flue gas cooling pipe 1 is provided with a working gas inlet pipe 11, a drainage chamber 12, a smoke inlet pipe 13, a cooling throat pipe 14, a cooling fluid chamber 15, and a diffusion pipe 16; the working gas inlet pipe 11, the drainage chamber 12, the cooling throat pipe 14 and the diffusion pipe 16 are sequentially connected or integrally formed; the end of the diffusion pipe 16 is the exhaust port of the flue gas cooling pipe 1, and the exhaust port of the flue gas cooling pipe 1 is provided with a flange; the working gas inlet pipe 11 is provided at one end of the flue gas cooling pipe 1; one end of the working gas inlet pipe 11 is a working gas inlet 111, and the working gas inlet 111 is provided with a flange, and high-pressure working gas is connected to the flue gas cooling pipe 1 from the working gas inlet 111; a nozzle port 112 is provided at the other end of the working gas inlet pipe 11; the nozzle port 112 is arranged in the drainage chamber 12; the diameter of the nozzle port 112 is smaller than the diameter at the working gas inlet 111; the rear of the nozzle port 112 in the drainage chamber 12 is a negative pressure chamber; a flange is provided at the front end of the smoke inlet pipe 13, and the smoke inlet pipe 13 is flange-connected to the kiln smoke exhaust port; a smoke inlet port 131 is provided at the other end of the smoke inlet pipe 13, and the smoke inlet port 131 is located at the negative pressure chamber in the drainage chamber 12.

[0024] The smoke inlet of the cooling throat 14 and the connection between the inside of the drainage cavity 12 are smooth transition surfaces; a narrow tube portion 141 is provided in the middle of the cooling throat 14, and the diameter of the narrow tube portion 141 is smaller than the diameter of the tube openings at both ends; cooling fins 142 are provided on the inner wall of the narrow tube portion 141; the cooling fins 142 are aluminum double-helix heat sinks;

[0025] The cooling fluid chamber 15 is provided on the outer wall of the cooling throat 14; the cooling fluid chamber 15 is provided with a liquid inlet 151 and a liquid outlet 152; the circulating cooling medium is poured into the cooling fluid chamber 15 from the liquid inlet 151, and the liquid outlet 152 is connected to the cooling medium supply equipment pipeline through a valve;

[0026] The circulating cooling medium may be industrial cooling water;

[0027] That is, the flue gas cooling pipe 1 is a venturi ejector, a cooling throat 14 is arranged in the flue gas cooling pipe 1, a narrow tube portion 141 is arranged in the middle of the cooling throat 14, and cooling fins 142 are arranged on the inner wall of the narrow tube portion 141; the cooling temperature of the circulating cooling medium is in contact with the flue gas through the cooling fins 142, thereby achieving the purpose of flue gas cooling.

[0028] Both ends of the smoke filter tube 2 are provided with flanges, and the smoke outlet of the smoke cooling tube 1 is sealed with the smoke inlet flange of the smoke filter tube 2; the smoke outlet of the smoke filter tube 2 can be connected to a straight smoke exhaust pipe or further connected to the purification equipment pipeline; a filter element limiting flange 21 is provided on the inner wall of one side of the smoke inlet of the smoke filter tube 2; a filter element abutment 22 is provided on one side of the smoke outlet of the smoke filter tube 2; a filter element 23 is provided in the smoke filter tube 2; the filter element 23 is arranged between the filter element limiting flange 21 and the filter element abutment 22;

[0029] The outer wall of the filter element 23 is provided with a limit sliding groove 231 adapted to the filter element limit flange 21; the end face of the filter element 23 on the smoke inlet side is provided with a filter element handle 232; when the limit sliding groove 231 on the filter element 23 corresponds to the filter element limit flange 21, the limit sliding groove 231 runs through the entire side wall of the filter element 23, and the filter element 23 can be slid into or pulled out of the smoke filter tube 2; after the filter element 23 slides into the smoke filter tube 2, the filter element 23 is rotated; the filter element 23 can be stuck between the filter element limit flange 21 and the filter element abutment 22;

[0030] The filter element 23 is provided with a plurality of filter capillaries 233; the plurality of filter capillaries 233 spirally penetrate the entire filter element 23 along their axis;

[0031] The filter element 23 is made of carbon fiber.

Claims

1. A flue gas separation device for a boiler, comprising: A flue gas cooling pipe (1) and a flue gas filtering pipe (2), wherein the flue gas cooling pipe (1) is a venturi ejector, and is provided with a working gas inlet pipe (11) and a smoke inlet pipe (13), and the other end of the flue gas cooling pipe (1) is flange-sealed with the flue gas filtering pipe (2); the flue gas cooling pipe (1) is characterized in that: a cooling throat pipe (14) is provided in the flue gas cooling pipe (1), a narrow tube portion (141) is provided in the middle of the cooling throat pipe (14), and cooling fins (142) are provided on the inner wall of the narrow tube portion (141); a filter element (23) is provided in the flue gas filtering pipe (2); the kiln flue gas is cooled by the cooling fins (142) and then filtered and discharged by the filter element (23).

2. A flue gas separation device for a boiler according to claim 1, characterized in that: The flue gas cooling pipe (1) is also provided with a drainage chamber (12), a cooling throat pipe (14), a cooling fluid chamber (15), and a diffusion pipe (16); the working gas inlet pipe (11), the drainage chamber (12), the cooling throat pipe (14), and the diffusion pipe (16) are connected in sequence.

3. A flue gas separation device for a boiler according to claim 2, characterized in that: The working gas inlet pipe (11) is arranged at one end of the flue gas cooling pipe (1); one end of the working gas inlet pipe (11) is a working gas inlet (111), and the working gas inlet (111) is provided with a flange, and high-pressure working gas is introduced into the flue gas cooling pipe (1) from the working gas inlet (111); the other end of the working gas inlet pipe (11) is provided with a nozzle opening (112); the nozzle opening (112) is arranged in the drainage chamber (12); the rear of the nozzle opening (112) in the drainage chamber (12) is a negative pressure chamber; the front end of the smoke inlet pipe (13) is provided with a flange, and the smoke inlet pipe (13) is flange-connected to the kiln exhaust port; the other end of the smoke inlet pipe (13) is provided with a smoke inlet (131), and the smoke inlet (131) is located at the negative pressure chamber in the drainage chamber (12).

4. A flue gas separation device for a boiler according to claim 3, characterized in that: The diameter of the nozzle opening (112) is smaller than the diameter of the working gas inlet (111).

5. A flue gas separation device for a boiler according to claim 3, characterized in that: The diameter of the narrow tube portion (141) is smaller than the diameter of the tube openings at both ends thereof.

6. A flue gas separation device for a boiler according to claim 3, characterized in that: The cooling fins (142) are aluminum double-helix heat sinks.

7. A flue gas separation device for a boiler according to claim 3, characterized in that: A cooling fluid cavity (15) is provided on the outer wall of the cooling throat (14); the cooling fluid cavity (15) is provided with a liquid inlet (151) and a liquid outlet (152); the liquid inlet (151) and the liquid outlet (152) are connected to the pipeline of the cooling medium supply equipment.

8. A flue gas separation device for a boiler according to claim 1, characterized in that: A filter element limiting flange (21) is provided on the inner wall of one side of the smoke inlet of the smoke filter tube (2); a filter element abutment (22) is provided on one side of the smoke outlet of the smoke filter tube (2); and a filter element (23) is arranged between the filter element limiting flange (21) and the filter element abutment (22).

9. A flue gas separation device for a boiler according to claim 8, characterized in that: The filter element (23) is provided with a limit sliding groove (231) on the outer wall of the filter element (23) which is compatible with the filter element limit flange (21); the limit sliding groove (231) runs through the entire side wall of the filter element (23); the end face of the smoke inlet side of the filter element (23) is provided with a filter element handle (232); a plurality of filter capillaries (233) are provided; and the plurality of filter capillaries (233) are spirally run through the entire filter element (23) along their axis.

10. A flue gas separation device for a boiler according to claim 8, characterized in that: The filter element (23) is made of carbon fiber.

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