Ash removal device for biomass gas boiler

Abstract

The utility model discloses a biomass gas boiler ash removal device which comprises a steam blowing assembly, and the steam blowing assembly comprises a steam tank. The sand blasting assembly comprises a sand blasting tank, a fourth self-control valve is mounted at the bottom of the sand blasting tank, and the bottom of the fourth self-control valve is connected to a compressed air pipe; three branch pipes are arranged at the branch position of the ash removal spray pipe and installed on the upper portion of the right side of the boiler body, a pipe bundle is installed in the boiler body, the left end of the pipe bundle extends out of the left boiler wall to be connected with a water outlet pipe, the left end of the water outlet pipe is connected with a conveying pump, and a combustor is arranged on the lower middle portion of the left side of the boiler body. The top of the furnace body is connected with a tail gas inlet pipe, and the tail gas inlet pipe is connected with a negative pressure fan.

Description

Technical Field

[0001] The utility model belongs to the field of boilers, and in particular relates to a biomass gas boiler ash cleaning device. Background Art

[0002] Biomass gas is a combustible energy source that uses crop straw, forest waste, edible fungus residue, livestock manure and all combustible substances as raw materials.

[0003] At present, in production, due to the large amount of dust and impurities in biomass gas, after the boiler has been running for a period of time, there will be ash attached to the tube bundle. If the ash is not cleaned for a long time, it will affect the heat exchange effect of the boiler. In order to clean the ash, relevant technicians have also designed some ash cleaning devices, but the effect is not very good. Utility Model Content

[0004] In view of the shortcomings of the prior art, the inventor has developed a biomass gas boiler ash cleaning device based on his own practical experience.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a biomass gas boiler ash cleaning device, comprising:

[0006] A steam purge assembly, the steam purge assembly comprising a steam tank, a steam outlet pipe is connected to the lower left side of the steam tank, and the left end of the steam outlet pipe can be connected to the dust cleaning nozzle through a screw;

[0007] A sandblasting assembly, the sandblasting assembly comprises a sandblasting tank, a fourth automatic control valve is installed at the bottom of the sandblasting tank, the bottom of the fourth automatic control valve is connected to a compressed air pipe, the right end of the compressed air pipe is connected to the compressed air tank, and the left end of the compressed air pipe can be connected to a dust cleaning nozzle through a screw; the sandblasting tank is filled with quartz sand, and the source of the quartz sand is purchased from the market.

[0008] A cleaning nozzle, three branch pipes emerge from the bifurcation of the cleaning nozzle, and the branch pipes are installed on the upper right side of the furnace body. A tube bundle is installed inside the furnace body, and the right end of the tube bundle extends out of the top of the furnace body and is connected to the tube bundle outlet pipe, and transports hot water to the next process. The left end of the tube bundle extends out of the left furnace wall and is connected to the water outlet pipe, and the left end of the water outlet pipe is connected to a delivery pump. A burner is provided in the lower middle part of the left side of the furnace body, and the left end of the burner is connected to the gas source pipe of the biomass gas. The top of the furnace body is connected to an exhaust gas inlet pipe, and the exhaust gas inlet pipe is connected to a negative pressure fan.

[0009] Furthermore, the three branch pipes are each provided with a first slope, a second slope and a third slope, the angle degree of the first slope is α, the angle degree of the second slope is 2α, the angle degree of the third slope is 4α, and the first slope, the second slope and the third slope are symmetrically arranged.

[0010] Furthermore, an air inlet valve is provided on the exhaust gas inlet pipe, the outlet of the negative pressure fan is connected to the exhaust gas outlet pipe, and the exhaust gas outlet pipe is provided with an air outlet valve.

[0011] Furthermore, a water inlet pipe is connected to the left side of the delivery pump, a first automatic control valve is installed on the water inlet pipe, a left end of the water inlet pipe is connected to the water pool, and a second automatic control valve is installed on the water outlet pipe.

[0012] Furthermore, a third automatic control valve is installed on the compressed air pipe, and a fifth automatic control valve is installed on the steam outlet pipe.

[0013] Furthermore, a cleaning door is provided at the lower right side of the furnace body, and a collecting vehicle is provided at the bottom of the furnace body, and the collecting vehicle is composed of a vehicle body and rollers. The vehicle body and rollers are made of heat-resistant steel, so there is no need to worry about the high temperature remaining in the furnace body damaging the rollers when collecting ash.

[0014] Furthermore, a flange is provided at the right end of the cleaning nozzle.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the device can better clean the ash on the tube bundle in the furnace by designing a steam purge component, a sandblasting component and a cleaning nozzle. When cleaning the tube bundle in the furnace, first connect the steam purge component with the cleaning nozzle. Steam has the characteristics of high temperature and high humidity. After the steam gas is purged, part of the ash on the tube bundle will fall off; then connect the sandblasting component with the cleaning nozzle. Under the action of compressed air, the quartz sand in the sandblasting tank further cleans the ash on the tube bundle. After cleaning with the steam purge component and the sandblasting component, the ash on the tube bundle can basically be cleaned up. It can meet the needs of boiler heat exchange and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a schematic diagram of the connection between the furnace body and the steam purge assembly.

[0018] Figure 3 It is a schematic diagram of the connection between the furnace body and the sandblasting assembly.

[0019] Figure 4 Schematic diagram of the cleaning nozzle and branch pipe.

[0020] Figure 5 Schematic diagram of the branch pipe.

[0021] Figure 6 Schematic diagram of the collection vehicle.

[0022] Figure numerals: 1. furnace body, 2. tube bundle, 3. exhaust gas inlet pipe, 4. air intake valve, 5. negative pressure fan, 6. exhaust gas outlet pipe, 7. air outlet valve, 8. water tank, 9. water inlet pipe, 10. first automatic valve, 11. delivery pump, 12. water outlet pipe, 13. second automatic valve, 14. tube bundle outlet pipe, 15. burner, 16. ash cleaning door, 17. collection vehicle, 1701. vehicle body, 1702. roller, 18. compressed air tank, 19. compressed air pipe, 20. third automatic valve, 21. fourth automatic valve, 22. sandblasting tank, 23. steam tank, 24. steam outlet pipe, 25. fifth automatic valve, 26. flange, 27. ash cleaning nozzle, 28. branch pipe, 29. first slope, 30. second slope, 31. third slope. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] like Figure 1 — Figure 6 As shown, a biomass gas boiler ash cleaning device comprises:

[0025] A steam purge assembly, the steam purge assembly comprises a steam tank 23, a steam outlet pipe 24 is connected to the lower left side of the steam tank 23, and the left end of the steam outlet pipe 24 can be connected to the dust removal nozzle 27 through a screw;

[0026] A sandblasting assembly, the sandblasting assembly includes a sandblasting pot 22, a fourth automatic control valve 21 is installed at the bottom of the sandblasting pot 22, the bottom of the fourth automatic control valve 21 is connected to a compressed air pipe 19, the right end of the compressed air pipe 19 is connected to a compressed air tank 18, and the left end of the compressed air pipe 19 can be connected to a dust cleaning nozzle 27 through a screw;

[0027] A cleaning nozzle 27, three branch pipes 28 are derived from the bifurcation of the cleaning nozzle 27, and the branch pipe 28 is installed at the upper right side of the furnace body 1. A tube bundle 2 is installed in the furnace body 1, and the right end of the tube bundle 2 extends out of the top of the furnace body 1 and is connected to the tube bundle outlet pipe 14, and transports hot water to the next process. The left end of the tube bundle 2 extends out of the left furnace wall and is connected to the water outlet pipe 12, and the left end of the water outlet pipe 12 is connected to the delivery pump 11. A burner 15 is provided in the middle and lower part of the left side of the furnace body 1, and the left end of the burner 15 is connected to the gas source pipe of the biomass gas. The top of the furnace body 1 is connected to the exhaust gas inlet pipe 3, and the exhaust gas inlet pipe 3 is connected to the negative pressure fan 5.

[0028] In this embodiment, the three branch pipes 28 are each provided with a first slope 29, a second slope 30 and a third slope 31, the angle of the first slope 29 is α, the angle of the second slope 30 is 2α, the angle of the third slope 31 is 4α, and the first slope 29, the second slope 30 and the third slope 31 are symmetrically arranged. The first slope 29, the second slope 30 and the third slope 31 can enable steam or quartz sand to obtain a faster flow rate and achieve a better cleaning effect.

[0029] In this embodiment, an air inlet valve 4 is provided on the exhaust gas inlet pipe 3 , an outlet of the negative pressure fan 5 is connected to an exhaust gas outlet pipe 6 , and an air outlet valve 7 is provided on the exhaust gas outlet pipe 6 .

[0030] In this embodiment, the left side of the delivery pump 11 is connected to a water inlet pipe 9 , a first automatic valve 10 is installed on the water inlet pipe 9 , the left end of the water inlet pipe 9 is connected to the water pool 8 , and a second automatic valve 13 is installed on the water outlet pipe 9 .

[0031] In this embodiment, a third automatic control valve 20 is installed on the compressed air pipe 19 , and a fifth automatic control valve 25 is installed on the steam outlet pipe 24 .

[0032] In this embodiment, a dust cleaning door 16 is provided at the lower right side of the furnace body 1 , and a collection vehicle 17 is provided at the bottom of the furnace body 1 . The collection vehicle 17 is composed of a vehicle body 1701 and a roller 1702 .

[0033] In this embodiment, a flange 26 is provided at the right end of the cleaning nozzle 27 .

[0034] When the device is used, first open the cleaning door 16, push the collection vehicle 17 into the furnace body 1, connect the steam outlet pipe 24 of the steam purge assembly to the flange 26 of the cleaning nozzle 27, the gas source pressure of the steam tank 23 is not less than 0.5Mpa, the steam enters the branch pipe 28 through the cleaning nozzle 27, and passes through the first slope 29, the second slope 30 and the third slope 31 in sequence, so as to obtain a faster flow rate, and the steam entering the furnace body 1 starts to purge the tube bundle 2, and the purge time is 0.5 hour to 1 hour; then the steam purge assembly and The flange 26 of the cleaning nozzle 27 is removed, and the sandblasting assembly is connected to the flange 26 of the cleaning nozzle 27. The air source pressure of the compressed air tank 18 is not less than 0.5Mpa. The quartz sand enters the branch pipe 28 through the cleaning nozzle 27, and passes through the first slope 29, the second slope 30 and the third slope 31 in sequence, so as to obtain a faster flow rate. The steam entering the furnace body 1 starts to purge the tube bundle 2, and the purge time is 15 minutes; the ash purged and dropped falls into the collection vehicle 17. After the cleaning operation is completed, the cleaning door 16 is opened and the collection vehicle 17 can be pulled out.

[0035] During the dust cleaning operation, the negative pressure fan 5 can be started, and the negative pressure fan 5 can extract the dust in the dust cleaning operation from the furnace body 1 in time to ensure the cleanliness of the dust cleaning operation site.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although two embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and combinations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A biomass gas boiler ash cleaning device, characterized in that: include: A steam purge assembly, the steam purge assembly comprising a steam tank, a steam outlet pipe is connected to the lower left side of the steam tank, and the left end of the steam outlet pipe can be connected to the dust cleaning nozzle through a screw; A sandblasting assembly, the sandblasting assembly includes a sandblasting tank, a fourth automatic control valve is installed at the bottom of the sandblasting tank, the bottom of the fourth automatic control valve is connected to a compressed air pipe, the right end of the compressed air pipe is connected to the compressed air tank, and the left end of the compressed air pipe can be connected to a dust cleaning nozzle through a screw; A cleaning nozzle, three branch pipes emerge from the bifurcation of the cleaning nozzle, and the branch pipes are installed on the upper right side of the furnace body. A tube bundle is installed inside the furnace body, and the right end of the tube bundle extends out of the top of the furnace body and is connected to the tube bundle outlet pipe, and transports hot water to the next process. The left end of the tube bundle extends out of the left furnace wall and is connected to the water outlet pipe, and the left end of the water outlet pipe is connected to a delivery pump. A burner is provided in the lower middle part of the left side of the furnace body, and the left end of the burner is connected to the gas source pipe of the biomass gas. The top of the furnace body is connected to an exhaust gas inlet pipe, and the exhaust gas inlet pipe is connected to a negative pressure fan.

2. The biomass gas boiler ash cleaning device according to claim 1, characterized in that: The three branch pipes are each provided with a first slope, a second slope and a third slope, the angle degree of the first slope is α, the angle degree of the second slope is 2α, the angle degree of the third slope is 4α, and the first slope, the second slope and the third slope are symmetrically arranged.

3. The biomass gas boiler ash cleaning device according to claim 1, characterized in that: The tail gas inlet pipe is provided with an air inlet valve, the outlet of the negative pressure blower is connected to the tail gas outlet pipe, and the tail gas outlet pipe is provided with an air outlet valve.

4. The biomass gas boiler ash cleaning device according to claim 1, characterized in that: The left side of the delivery pump is connected with a water inlet pipe, a first automatic control valve is installed on the water inlet pipe, the left end of the water inlet pipe is connected with a water pool, and a second automatic control valve is installed on the water outlet pipe.

5. The biomass gas boiler ash cleaning device according to claim 1, characterized in that: The compressed air pipe is provided with a third automatic control valve, and the steam outlet pipe is provided with a fifth automatic control valve.

6. The biomass gas boiler ash cleaning device according to claim 1, characterized in that: A dust cleaning door is arranged at the lower right side of the furnace body, and a collecting vehicle is arranged at the bottom of the furnace body. The collecting vehicle is composed of a vehicle body and rollers.

7. The biomass gas boiler ash cleaning device according to claim 1, characterized in that: The right end of the cleaning nozzle is provided with a flange.

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