CN116608456B - External combustor of energy-saving steam generator - Google Patents

Abstract

The present invention relates to the technical field of steam generators, and in particular to an external burner of an energy-saving steam generator. Technical problem: The prior art uses water from an outer waste heat collection pipe to supplement the water in an inner heat exchange pipe, but the water in the outer pipe has a low temperature, and the heat will be diluted when it is introduced into the inner pipe. Technical solution: An external burner of an energy-saving steam generator includes a mounting frame, a combustion device, a first ventilation pipe, a second ventilation pipe, and a waste heat utilization system, etc.; the mounting frame is equipped with a combustion device; the combustion device is connected to the first ventilation pipe; the first ventilation pipe is connected to the second ventilation pipe; the first ventilation pipe, the second ventilation pipe and the steam generating device are connected to the waste heat utilization system. The water with lower heat in the outer heat exchange pipe is heated by the heat dissipated by the first ventilation pipe and then input into the inner heat exchange pipe, so that the water source in the inner heat exchange pipe is quickly replenished, and the original heat in the inner heat exchange pipe is no longer diluted, thereby avoiding the problem of reduced working efficiency of the inner heat exchange pipe.

Description

An external burner for energy-saving steam generator

Technical Field

The invention relates to the technical field of steam generators, and in particular to an external burner of an energy-saving steam generator.

Background technique

The existing technology uses multi-layer heat exchange tubes to perform heat exchange work, thereby achieving the purpose of fully utilizing heat. However, the flue gas after the heat is replaced still has some heat. The existing technology often treats this part of the flue gas by directly discharging it, which makes the temperature around the already stuffy factory building even higher. If the flue gas that has been completely replaced can be used for reheating, energy consumption can be further reduced.

The prior art uses water from the outer tube to supplement the water in the inner tube. However, the prior art does not take into account that the water in the outer tube has a low temperature and will be diluted when introduced into the inner tube, which will reduce the working efficiency of the inner tube.

Moreover, when the combustion chamber is heating the steam bin, the dust generated by the combustion will be introduced into the steam bin. Although the prior art will add filter materials in the smoke conveying pipe to filter the smoke, the temperature of the smoke is too high. After a long period of use, the machine must be stopped and cooled before the filter material can be replaced. For the replacement of the filter material, the filter material is horizontally drawn out from the filter material installation position of the conveying pipe by a flat suction method. This method causes the intercepted smoke particles to scrape against the opening at the conveying pipe installation position and remain in the opening area at the installation position, which is difficult to clean. In addition, this method is complicated to operate and requires multiple disassembly and assembly operations, which greatly reduces work efficiency.

Summary of the invention

In order to overcome the disadvantages that the prior art does not utilize the flue gas that still has some heat after the heat is replaced, and cannot effectively reduce energy consumption; and, the prior art uses the water in the outer waste heat collection pipe to supplement the water in the inner heat exchange pipe, but the prior art does not take into account that the water temperature in the outer pipe is low, and the heat will be diluted when introduced into the inner pipe, which will cause the working efficiency of the inner pipe to decrease; and, the prior art replaces the filter material in a way that the intercepted smoke particles scrape against the opening at the installation location of the conveying pipeline, and remain in the opening area at the installation location, which is difficult to clean, and the operation is complicated, requiring multiple disassembly and assembly operations, greatly reducing the shortcomings of the working efficiency. The present invention provides an external burner for an energy-saving steam generator.

The technical scheme is as follows: an external burner of an energy-saving steam generator, comprising a mounting frame, a combustion device, a first ventilation pipe, a second ventilation pipe, a steam generating device, a waste heat utilization system and a smoke filtering system; the mounting frame is mounted with a combustion device; the mounting frame is mounted with a steam generating device; the combustion device is connected to the first ventilation pipe; the first ventilation pipe is connected to the second ventilation pipe, and the second ventilation pipe is connected to the steam generating device; the steam generating device is provided with an air outlet, a water injection pipe, an inner heat exchange pipe, a middle heat exchange pipe, an outer heat exchange pipe and an air outlet pipe; the first ventilation pipe, the second ventilation pipe and the steam generating device are commonly connected with a waste heat utilization system; the waste heat utilization system and the second ventilation pipe are commonly connected with a smoke filtering system; the waste heat utilization system is used to heat the water with a lower temperature in the outer heat exchange pipe by the heat dissipated by the first ventilation pipe and then input it into the inner heat exchange pipe; the smoke filtering system is used to spray part of the water with a lower temperature in the outer heat exchange pipe after being heated by the heat dissipated by the first ventilation pipe into the second ventilation pipe through which the high-calorie smoke passes.

Preferably, the waste heat utilization system includes a first water pipe, a second water pipe and a third water pipe; the external heat exchange pipe is connected to the first water pipe, and the first water pipe is spirally wound around the outside of the first ventilation pipe; the first water pipe is connected to the second water pipe, and the second water pipe is connected to the first ventilation pipe; the second water pipe is connected to the third water pipe, and the third water pipe is connected to the internal heat exchange pipe.

Preferably, the smoke filtering system includes a smoke interception component and a smoke cleaning component; the second water pipe and the second ventilation pipe are commonly connected to the smoke interception component; the second ventilation pipe and the smoke interception component are commonly connected to the smoke cleaning component.

Preferably, the smoke and dust interception component includes a nozzle, a filter, a collection bin and a wind drive; a plurality of nozzles distributed in a circular array are arranged on the inner annular surface of the second water pipe, and the nozzles are inclined downward; the second ventilation pipe is fixedly connected to the filter; the filter has four sewage collecting troughs distributed in a circular array; the filter is detachably connected to the collection bin; the filter is rotatably connected to the wind drive, and the wind drive is provided with a fan; the wind drive is provided with four scrapers distributed in a circular array.

Preferably, the smoke cleaning assembly includes a threaded disk and a spring rod; the second ventilation pipe is detachably connected to the threaded disk; the threaded disk is fixedly connected to the spring rod, and the other end of the spring rod is fixedly connected to the collection bin.

Preferably, the diameter of the inner heat exchange tube is smaller than that of the middle heat exchange tube, the diameter of the middle heat exchange tube is smaller than that of the outer heat exchange tube, the inner heat exchange tube and the middle heat exchange tube are connected, and the outer heat exchange tubes are connected to each other.

Preferably, the water curtain sprayed by the nozzle can contact the fan arranged on the upper part of the wind drive.

Preferably, the wind drive is provided with a drainage trough.

Preferably, the first ventilation pipe is provided with a shielding ring.

Preferably, an air guide disk is provided inside the wind drive, and the air guide disk is circular as a whole.

The beneficial effects of the present invention are as follows: first, water for replacing heat is injected into the outer heat exchange tube, the middle heat exchange tube and the inner heat exchange tube through the water injection pipe, and the combustion device is started to sequentially transport high-calorie flue gas to the steam generating device through the first ventilation pipe and the second ventilation pipe, so that the water in the outer heat exchange tube, the middle heat exchange tube and the inner heat exchange tube inside the steam generating device is heated to become steam, and the steam is output through the exhaust pipe, so that normal heat energy conversion operation is performed; in this process, the water with lower heat in the outer heat exchange tube is heated by the heat dissipated by the first ventilation pipe through the waste heat utilization system and then input into the inner heat exchange tube, so that the water source in the inner heat exchange tube is quickly replenished, and the original heat in the inner tube is no longer diluted, effectively avoiding the problem of reduced working efficiency of the inner tube;

At the same time, part of the water in the external heat exchange tube is heated and sprayed out through the smoke filter system to form a water curtain, which contacts the high-calorie smoke in the second ventilation pipe, thereby intercepting the smoke particles in the high-calorie smoke and achieving the purpose of filtering the high-calorie smoke;

At the same time, the filtered high-calorie flue gas can be directly transported to the heat collection device together with the steam in the internal heat exchange tube, effectively utilizing the flue gas that still has some heat after the heat is replaced, effectively reducing energy consumption.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a first disclosed external burner of an energy-saving steam generator of the present invention;

FIG2 is a schematic structural diagram of a second disclosed external burner of the energy-saving steam generator of the present invention;

FIG3 is a schematic structural diagram of a waste heat utilization system and a smoke filter system disclosed by an external burner of an energy-saving steam generator of the present invention;

FIG4 is a partial structural schematic diagram of a smoke filtration system disclosed by an external burner of an energy-saving steam generator of the present invention;

5 is a partial structural schematic diagram of a smoke interception component in a smoke filtration system disclosed by an external burner of an energy-saving steam generator of the present invention;

FIG. 6 is an exploded view of a part of the structure of a smoke interception component in a smoke filtration system disclosed by an external burner of an energy-saving steam generator of the present invention.

Explanation of the reference numerals: 1-mounting frame, 2-combustion device, 3-first ventilation pipe, 4-second ventilation pipe, 5-steam generating device, 101-first water pipe, 102-second water pipe, 103-third water pipe, 201-nozzle, 202-filter, 203-collecting bin, 204-wind drive, 211-threaded disk, 212-spring rod, 3a-shielding ring, 5a-air outlet, 5b-water injection pipe, 5c-inner heat exchange tube, 5d-middle heat exchange tube, 5e-outer heat exchange tube, 5f-air outlet pipe, 202a-sewage collecting tank, 204a-scraper, 204b-drainage tank, 204c-air guide plate.

Detailed ways

The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

Example 1

An external combustion machine of an energy-saving steam generator, as shown in Figures 1-6, includes a mounting frame 1, a combustion device 2, a first ventilation pipe 3, a second ventilation pipe 4, a steam generating device 5, a waste heat utilization system and a smoke filtering system; the mounting frame 1 is mounted with the combustion device 2; the mounting frame 1 is mounted with the steam generating device 5; the combustion device 2 is connected with the first ventilation pipe 3; the first ventilation pipe 3 is connected with the second ventilation pipe 4, and the second ventilation pipe 4 is connected with the steam generating device 5; the steam generating device 5 is provided with an air outlet 5a, a water injection pipe 5b, an inner heat exchange pipe 5c, a middle heat exchange pipe 5d, an outer heat exchange pipe 5e and an air outlet pipe 5f; the first ventilation pipe 3, the second ventilation pipe 4 and the steam generating device 5 are connected; The second ventilation pipes 4 and the steam generating device 5 are commonly connected to a waste heat utilization system; the waste heat utilization system and the second ventilation pipe 4 are commonly connected to a smoke dust filtering system; the water with lower calorie in the outer heat exchange pipe 5e is heated by the heat dissipated by the first ventilation pipe 3 through the waste heat utilization system and then input into the inner heat exchange pipe 5c, so that the water source in the inner heat exchange pipe 5c is quickly replenished and the original heat in the inner heat exchange pipe 5c is no longer diluted; part of the water in the outer heat exchange pipe 5e is heated by the smoke dust filtering system and then sprayed out to form a water curtain, which contacts the high-calorie flue gas in the second ventilation pipe 4, thereby intercepting the smoke particles in the high-calorie flue gas and achieving the purpose of filtering the high-calorie flue gas.

The waste heat utilization system includes a first water pipe 101, a second water pipe 102 and a third water pipe 103; the external heat exchange pipe 5e is connected to the first water pipe 101, and the first water pipe 101 is spirally wound around the outside of the first ventilation pipe 3; the first water pipe 101 is connected to the second water pipe 102, and the second water pipe 102 is connected to the first ventilation pipe 3; the second water pipe 102 is connected to the third water pipe 103, and the third water pipe 103 is connected to the internal heat exchange pipe 5c.

The smoke filtering system includes a smoke intercepting component and a smoke cleaning component; the second water pipe 102 and the second ventilation pipe 4 are commonly connected to the smoke intercepting component; the second ventilation pipe 4 and the smoke intercepting component are commonly connected to the smoke cleaning component.

The smoke and dust interception component includes a nozzle 201, a filter 202, a collection bin 203 and a wind driver 204; the inner ring surface of the second water pipe 102 is provided with a plurality of nozzles 201 distributed in a circular array, and the nozzles 201 are inclined downward; the second ventilation pipe 4 is bolted with the filter 202; the filter 202 is provided with four dirt collecting troughs 202a distributed in a circular array; the filter 202 is detachably connected to the collection bin 203; the filter 202 is rotatably connected to the wind driver 204, and the wind driver 204 is provided with a fan; the wind driver 204 is provided with four scrapers 204a distributed in a circular array.

The smoke cleaning assembly includes a threaded disc 211 and a spring rod 212 ; the second ventilation pipe 4 is detachably connected to the threaded disc 211 ; the threaded disc 211 is fixedly connected to the spring rod 212 , and the other end of the spring rod 212 is fixedly connected to the collection bin 203 .

The diameter of the inner heat exchange tube 5c is smaller than that of the middle heat exchange tube 5d, and the diameter of the middle heat exchange tube 5d is smaller than that of the outer heat exchange tube 5e. The inner heat exchange tube 5c and the middle heat exchange tube 5d are connected, and the outer heat exchange tube 5e is connected to each other.

The water curtain sprayed by the nozzle 201 can contact the fan arranged on the upper part of the wind driver 204, and the fan arranged on the upper part of the wind driver 204 can be washed through the water curtain.

The wind driver 204 is provided with a drainage groove 204 b to effectively prevent the water flow containing smoke particles from gathering in the wind driver 204 .

The wind drive 204 is made of a lightweight, high temperature resistant material as a whole, and has low rotation resistance.

The first ventilation pipe 3 is provided with a shielding ring 3a, which can prevent the high-calorie flue gas from directly contacting the nozzle 201.

An air guide plate 204c is disposed inside the wind driver 204. The air guide plate 204c is generally circular, and water containing smoke particles can flow directly downward along the circular outer surface of the air guide plate 204c without accumulating at the air guide plate 204c and causing difficulty in cleaning.

The specific work of the present invention is:

Water for replacing heat is injected into the outer heat exchange tube 5e, the middle heat exchange tube 5d and the inner heat exchange tube 5c through the water injection pipe 5b, and the combustion device 2 is started to sequentially transport high-calorie flue gas to the steam generating device 5 through the first ventilation pipe 3 and the second ventilation pipe 4, so that the water in the outer heat exchange tube 5e, the middle heat exchange tube 5d and the inner heat exchange tube 5c inside the steam generating device 5 is heated to become steam, and the steam is output through the exhaust pipe 5f, so that normal heat energy conversion operation is performed;

In this process, the water with low heat in the outer heat exchange tube 5e is circulated to the inner heat exchange tube 5c through the first water pipe 101, the second water pipe 102 and the third water pipe 103 in sequence. Since there is a continuous high-heat flue gas passing through the first ventilation tube 3, the outer surface of the first ventilation tube 3 can emit a relatively high heat. The heat emitted by the first ventilation tube 3 is used to heat the water circulating in the spiral first water pipe 101, so that the water input from the outer heat exchange tube 5e to the inner heat exchange tube 5c has a relatively high heat, so that the water source in the inner heat exchange tube 5c is quickly replenished, and the original heat in the inner tube is no longer diluted, effectively avoiding the problem of reduced working efficiency of the inner tube.

At the same time, the heated water in the first water pipe 101 is sprayed toward the high-calorie smoke in the second ventilation pipe 4 through the second water pipe 102 and the nozzle 201, forming a water curtain to intercept smoke particles in the high-calorie smoke, thereby achieving the purpose of filtering the high-calorie smoke;

The intercepted smoke particles are driven by the water which has not yet turned into steam to slide into the filter 202 along the slope of the wind driver 204 and gather at the inner bottom of the filter 202. At the same time, the high-heat smoke in the second ventilation pipe 4 blows the fan in the wind driver 204, and the whole wind driver 204 is driven to rotate by the fan, thereby driving the scraper 204a provided on the wind driver 204 to rotate and scrape the smoke particles gathered at the inner bottom of the filter 202 to the collecting tank 202a, so that the smoke particles are collected in the collecting bin 203. After a period of filtering operation, the threaded disk 211 is manually screwed down and taken out, and the elastic disk 211 is manually screwed down and taken out. The spring rod 212 and the collection bin 203 filled with smoke particles are pulled out, the collection bin 203 is cleaned, and then the cleaned collection bin 203 is installed back to the initial position. The downward extraction method is adopted so that the smoke particles intercepted by the filter 202 will not be scraped against the installation position of the filter 202, which solves the problem that in the prior art, the filter material is horizontally extracted from the filter material installation position of the conveying pipeline by a flat extraction method, and this method causes the intercepted smoke particles to scrape against the opening of the conveying pipeline installation position, and remain in the opening area of the installation position, which is difficult to clean. In addition, this method is complicated to operate and requires multiple disassembly and assembly operations, which greatly reduces the work efficiency.

It should be noted that when the hot water sprayed from the nozzle 201 contacts the high-calorie smoke in the second ventilation pipe 4, it will not be directly heated into steam, but can effectively intercept smoke particles in the high-calorie smoke and carry the smoke particles to the wind driver 204. After 2-3 seconds, it begins to turn into steam without affecting the normal passage of the filtered high-calorie smoke. The filtered high-calorie smoke drives this part of the steam to be transported to the steam generating device 5.

It should be noted that the arrangement of the drainage groove 204b enables the high-calorie smoke after filtering through the fan of the wind drive 204 to return to the second ventilation pipe 4 again, without affecting the normal passage of smoke;

Since the flue gas transported from the second ventilation pipe 4 to the steam generating device 5 is filtered high-calorie flue gas and also contains a large amount of steam, it can be directly used after heating the water in the inner heat exchange tube 5c, the middle heat exchange tube 5d and the outer heat exchange tube 5e, and can be transported to the heat collection device through the air outlet 5a, effectively utilizing the flue gas that still has some heat after the heat is replaced, effectively reducing energy consumption.

The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims (6)

1. An external combustion machine of an energy-saving steam generator comprises a mounting frame (1), a combustion device (2), a first ventilation pipe (3), a second ventilation pipe (4) and a steam generation device (5); the mounting frame (1) is provided with a combustion device (2); the mounting frame (1) is provided with a steam generating device (5); the combustion device (2) is communicated with a first vent pipe (3); the first ventilation pipe (3) is communicated with a second ventilation pipe (4), and the second ventilation pipe (4) is communicated with the steam generating device (5); the steam generating device (5) is provided with an air outlet (5 a), a water injection pipe (5 b), an inner heat exchange pipe (5 c), a middle heat exchange pipe (5 d), an outer heat exchange pipe (5 e) and an air outlet pipe (5 f); the device is characterized by also comprising a waste heat utilization system and a smoke filtering system; the first ventilation pipe (3), the second ventilation pipe (4) and the steam generation device (5) are connected with a waste heat utilization system together; the waste heat utilization system and the second vent pipe (4) are connected with a smoke dust filtering system together; the waste heat utilization system is used for heating water with lower temperature in the outer heat exchange tube (5 e) through heat emitted by the first vent tube (3) and then inputting the heated water into the inner heat exchange tube (5 c); the smoke filtering system is used for heating water with lower heat in the outer heat exchange tube (5 e) through the heat emitted by the first ventilation tube (3), and then part of the water is sprayed into the second ventilation tube (4) through which high-heat smoke passes;

The waste heat utilization system comprises a first water through pipe (101), a second water through pipe (102) and a third water through pipe (103); the outer heat exchange tube (5 e) is communicated with a first water through tube (101), and the first water through tube (101) is spirally wound outside the first air pipe (3); the first water through pipe (101) is communicated with a second water through pipe (102), and the second water through pipe (102) is connected with the first air through pipe (3); the second water through pipe (102) is communicated with a third water through pipe (103), and the third water through pipe (103) is communicated with the inner heat exchange pipe (5 c);

The smoke filtering system comprises a smoke interception component and a smoke cleaning component; the second ventilation pipe (102) and the second ventilation pipe (4) are connected with a smoke interception component together; the second ventilation pipe (4) and the smoke interception component are connected with a smoke cleaning component together;

the smoke interception component comprises a spray head (201), a filter (202), a collection bin (203) and a wind power driver (204); the inner annular surface of the second water through pipe (102) is provided with a plurality of spray heads (201) distributed in an annular array, and the spray heads (201) incline downwards; the second vent pipe (4) is fixedly connected with a filter (202); the filter (202) is provided with four sewage collecting grooves (202 a) distributed in an annular array; the filter (202) is detachably connected with a collecting bin (203); the filter (202) is rotationally connected with a wind driver (204), and the wind driver (204) is provided with a fan; the wind driver (204) is provided with four scraping blades (204 a) distributed in an annular array;

The smoke cleaning component comprises a threaded disc (211) and a spring rod (212); the second vent pipe (4) is detachably connected with a threaded disc (211); the screw thread disc (211) is fixedly connected with a spring rod (212), and the other end of the spring rod (212) is fixedly connected with the collecting bin (203).

2. The external combustion machine of an energy-saving steam generator according to claim 1, wherein the pipe diameter of the inner heat exchange pipe (5 c) is smaller than that of the middle heat exchange pipe (5 d), the pipe diameter of the middle heat exchange pipe (5 d) is smaller than that of the outer heat exchange pipe (5 e), the inner heat exchange pipe (5 c), the middle heat exchange pipe (5 d) are communicated, and the outer heat exchange pipes (5 e) are mutually communicated.

3. The external burner of an energy-efficient steam generator according to claim 1, wherein the water curtain sprayed from the spray head (201) can contact a fan provided at the upper part of the wind power driver (204).

4. The external combustion engine of an energy efficient steam generator according to claim 1, characterized in that the wind power drive (204) is provided with a drain tank (204 b).

5. An external burner for an energy efficient steam generator according to claim 1, characterized in that the first ventilation pipe (3) is provided with a shielding ring (3 a).

6. The external combustion engine of an energy-saving steam generator according to claim 1, wherein the wind driver (204) is internally provided with an air guiding disc (204 c), and the air guiding disc (204 c) is round as a whole.