Flue gas purification equipment for large garbage incinerator

Abstract

The utility model relates to the technical field of garbage flue gas purification equipment, and discloses flue gas purification equipment for a large garbage incinerator, which comprises a garbage combustion furnace, the upper part of the combustion furnace is connected with a main flue gas pipe, the gas outlet end of the main flue gas pipe is connected with a heat preservation heat exchange box, and the top of the heat preservation heat exchange box is connected with a slave flue gas pipe; the smoke outlet end of the secondary smoke pipe is connected with a spray tower, and a fan is arranged on the secondary smoke pipe; a plurality of U-shaped heat exchange pipes are arranged on the heat preservation heat exchange box, a water inlet pipe is welded to one end of each U-shaped heat exchange pipe, a water outlet pipe is welded to the other end of each U-shaped heat exchange pipe, a first electric push rod is fixedly connected to the heat preservation heat exchange box, and a scraper is fixedly connected to a piston rod of the first electric push rod and is in sliding connection with the U-shaped heat exchange pipes; a filter box is arranged on the main smoke pipe, and a coarse filter screen is arranged in the filter box. The flue gas heat exchange structure is high in heat exchange efficiency, easy to maintain and clean and convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of garbage smoke purification equipment, in particular to a smoke purification equipment for a large-scale garbage incinerator. Background Art

[0002] Nowadays, the use of garbage incinerators is more common in the field of garbage disposal. A garbage incinerator is a device that burns garbage. In order to facilitate the centralized destruction of some garbage, the incineration destruction method is more thorough and can greatly improve the efficiency of garbage destruction.

[0003] A large amount of flue gas will be generated during the incineration of existing garbage. In order not to pollute the environment, existing incinerators are equipped with special flue gas purification devices to purify the flue gas. For example, a garbage incinerator with flue gas purification function published by announcement No. CN220397532U has the following main features: the furnace includes an incinerator main body; a feed pipe is fixedly installed on the upper end of the incinerator main body, an exhaust circulation pipe is fixedly installed on the outer side of the incinerator main body, a cooling component is arranged at the bottom end of the exhaust circulation pipe, a tower body is arranged at one end of the exhaust circulation pipe, a spray component is arranged on the outer side of the tower body, an exhaust pipe is fixedly installed on the upper end of the tower body, an inspection door is arranged on the outer side of the incinerator main body, and a supporting leg is fixedly installed at the bottom end of the incinerator main body.

[0004] During the use of the flue gas purification equipment for the waste incinerator in the above application, the applicant found that:

[0005] 1. In the above structure, the high-temperature flue gas flows in the exhaust circulation pipe and then exchanges heat with the external circulating water pipe. In the upper heat exchange structure, the flue gas exchanges heat with the circulating water pipe through the exhaust circulation pipe. The flue gas does not directly contact the heat exchange pipe, and the heat exchange efficiency is low.

[0006] 2. After long-term use, a lot of soot will accumulate on the inner wall of the S-shaped exhaust circulation pipe, which will affect the heat exchange efficiency. In addition, the entire exhaust circulation pipe is S-shaped, which makes it very troublesome to maintain and clean it in the future.

[0007] In order to solve the above-mentioned problems, a flue gas purification device for a large-scale garbage incinerator is provided. Utility Model Content

[0008] The purpose of the utility model is to provide a flue gas purification device for a large-scale garbage incinerator in order to solve the above-mentioned problems.

[0009] The technical solution adopted by the utility model is as follows: a flue gas purification device for a large-scale garbage incinerator, comprising a garbage combustion furnace, the upper part of the combustion furnace is connected with a main smoke pipe, the gas outlet end of the main smoke pipe is connected with a heat preservation heat exchange box, the top of the heat preservation heat exchange box is connected with a secondary smoke pipe, the smoke outlet end of the secondary smoke pipe is connected with a spray tower, and a fan is arranged on the secondary smoke pipe;

[0010] The heat preservation heat exchange box is provided with a plurality of U-shaped heat exchange tubes, one end of the U-shaped heat exchange tube is welded with a water inlet pipe, and the other end of the U-shaped heat exchange tube is welded with a water outlet pipe. The heat preservation heat exchange box is fixedly connected with an electric push rod 1, and a scraper is fixedly connected to the piston rod of the electric push rod 1, and the scraper is slidably connected with the U-shaped heat exchange tube;

[0011] A filter box is arranged on the main smoke pipe, and a coarse filter screen is arranged inside the filter box.

[0012] In a preferred embodiment, a box door is hingedly connected to one side of the lower portion of the thermal insulation heat exchange box.

[0013] In a preferred embodiment, a second electric push rod is fixedly connected to the lower portion of the heat preservation and heat exchange box, and a piston rod of the second electric push rod is fixedly connected to a push plate.

[0014] In a preferred embodiment, guide rods are fixedly connected to both sides of the push plate, and the guide rods are slidably connected to the side walls of the thermal insulation heat exchange box.

[0015] In a preferred embodiment, a connecting plate is fixedly connected to the bottom of the filter box by bolts, a mounting frame is fixedly connected to the connecting plate, the mounting frame can be inserted into the filter box, and the coarse filter is fixedly mounted on the mounting frame.

[0016] In a preferred embodiment, the spray tower includes a tower body, a spray pipe and a packing layer are arranged in the tower body, a water supply pipe is connected to the lower part of the tower body, the water supply pipe is connected to the spray pipe, and a water pump is arranged on the water inlet side of the water supply pipe.

[0017] In a preferred embodiment, a smoke outlet pipe is provided on the top of the tower body.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0019] 1. In the utility model, after the high-temperature flue gas enters the heat-insulating heat exchange box, it directly contacts and exchanges heat with the U-star heat exchange tube, and the heat exchange efficiency is high.

[0020] 2. In the utility model, the electric push rod 1 is used to drive the scraper to move, so as to clean the smoke and dust accumulated on the U-shaped heat exchange tube, thereby avoiding affecting the heat exchange. At the same time, the cleaned smoke and dust will fall to the bottom of the heat insulation heat exchange box, and then the box door is opened, and the electric push rod 2 is started to drive the push rod to move, so as to remove the smoke and dust of the cleaning material. The whole structure is convenient for cleaning the U-shaped heat exchange tube and is easy to use.

[0021] 3. In the utility model, the coarse filter in the filter box can effectively filter large dust particles in the flue gas, thereby preventing the dust from entering and accumulating in the subsequent heat exchange equipment, and reducing the impact of large smoke particles on heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0024] Figure 3 The three-dimensional structure schematic diagram of the heat exchange tube and scraper assembly in the utility model is shown;

[0025] Figure 4 The utility model is a simplified schematic diagram of the three-dimensional structure of the push plate assembly.

[0026] Markings in the figure: 1-combustion furnace, 2-main smoke pipe, 3-insulation heat exchange box, 4-slave smoke pipe, 5-spray tower, 6-fan, 7-U-type heat exchange tube, 8-water inlet pipe, 9-water outlet pipe, 10-electric push rod 1, 11-scraper, 12-filter box, 13-coarse filter, 14-box door, 15-electric push rod 2, 16-push plate, 17-guide rod, 18-connecting plate, 19-installation frame, 20-tower body, 21-packing layer, 22-water supply pipe, 23-water pump, 24-smoke outlet pipe, 25-spray pipe. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0028] The following will be combined Figure 1-Figure 4 A flue gas purification device for a large-scale garbage incinerator according to an embodiment of the utility model is described in detail.

[0029] Example:

[0030] The utility model provides a flue gas purification device for a large-scale garbage incinerator, referring to Figures 1 to 4 As shown, it includes a garbage incinerator 1, the upper part of the incinerator 1 is connected to a main smoke pipe 2, the air outlet end of the main smoke pipe 2 is connected to a heat-insulating heat exchange box 3, the top of the heat-insulating heat exchange box 3 is connected to a secondary smoke pipe 4, the smoke outlet end of the secondary smoke pipe 4 is connected to a spray tower 5, and a fan 6 is arranged on the secondary smoke pipe 4. In this structure, garbage is put into the incinerator 1 for combustion, and then the flue gas enters the heat-insulating heat exchange box 3 from the main smoke pipe 2 for heat exchange, and the flue gas after heat exchange enters the secondary smoke pipe 4, and then is sent to the spray tower 5 for purification.

[0031] refer to Figures 1 to 4 As shown, a plurality of U-shaped heat exchange tubes 7 are arranged on the heat preservation heat exchange box 3, a water inlet pipe 8 is welded to one end of the U-shaped heat exchange tube 7, and a water outlet pipe 9 is welded to the other end of the U-shaped heat exchange tube 7. The water inlet pipe 8 of this structure can be connected to the cooling water delivery pipe, and then the cooling water return pipe is connected to the water outlet pipe 9, so as to form a heat exchange loop, the cooling water enters the U-shaped heat exchange tube 7 through the water inlet pipe 8, and then the high temperature is heat-exchanged with the high temperature flue gas, so as to heat the cooling water, thereby realizing the heat recovery of the flue gas. In the above structure, the flue gas directly contacts with the heat exchange tube for heat exchange, and the heat exchange efficiency is better.

[0032] refer to Figures 1 to 4 As shown, an electric push rod 10 is fixedly connected to the heat-insulating box 3, and a scraper 11 is fixedly connected to the piston rod of the electric push rod 10. The scraper 11 is slidably connected to the U-shaped heat exchange tube 7. In this structure, the electric push rod 10 is used to drive the scraper 11 to move, so as to scrape and clean the ash accumulated on the U-shaped heat exchange tube 7. The ash will fall to the bottom of the heat-insulating box 3, thereby preventing the ash accumulation from affecting the heat exchange efficiency.

[0033] refer to Figures 1 to 4 As shown, a filter box 12 is provided on the main smoke pipe 2, and a coarse filter screen 13 is provided inside the filter box 12. In this structure, the coarse filter screen 13 in the filter box 12 can effectively filter large particles of dust in the smoke, thereby preventing dust from entering and accumulating in subsequent heat exchange equipment, and reducing the impact of large particles of smoke on heat exchange.

[0034] refer to Figures 1 to 4 As shown, the heat preservation and heat exchange box as a whole needs to have two sets in parallel, one is in use and the other is spare. If the heat preservation and heat exchange box in use is broken, the spare heat preservation and heat exchange box can be immediately replaced and used. The lower side of the heat preservation and heat exchange box 3 is hinged with a box door 14, and the lower part of the heat preservation and heat exchange box 3 is fixedly connected with an electric push rod 2 15, and the piston rod of the electric push rod 2 15 is fixedly connected with a push plate 16. In this structure, when personnel need to clean the heat preservation and heat exchange box 3, they can open the box door 14, and then start the electric push rod 2 15 to drive the push rod 16 to move, and then push the cleaned ash in the heat preservation and heat exchange box 3 out of the heat preservation and heat exchange box 3, so as to automatically clean the heat preservation and heat exchange box 3, which is convenient to use.

[0035] refer to Figures 1 to 4 As shown, guide rods 17 are fixedly connected to both sides of the push plate 16 , and the guide rods 17 are slidably connected to the side walls of the heat preservation and heat exchange box 3 . This structure uses the guide rods 17 to guide the movement of the push plate 16 .

[0036] refer to Figures 1 to 4As shown, the bottom of the filter box 12 is fixedly connected to a connecting plate 18 by bolts, and a mounting frame 19 is fixedly connected to the connecting plate 18. The mounting frame 19 can be inserted into the filter box 12, and the coarse filter 13 is fixedly mounted on the mounting frame 19. In this structure, personnel can remove the connecting plate 18, thereby removing the mounting frame 19 from the filter box 12, and thereby removing the coarse filter 13 from the filter box 12 for cleaning.

[0037] refer to Figures 1 to 4 As shown, the spray tower 5 includes a tower body 20, in which a spray pipe 25 and a packing layer 21 are arranged. A water supply pipe 22 is connected to the lower part of the tower body 20, and the water supply pipe 22 is communicated with the spray pipe 25. A water pump 23 is arranged on the water inlet side of the water supply pipe 22. In this structure, the water pump is used to draw purified water at the bottom of the tower body 20 from the water supply pipe 22 into the spray pipe 25, and the spray pipe 25 is used to spray the purified water, thereby spraying and purifying the flue gas, and at the same time, the packing layer 21 is used to filter the flue gas, thereby purifying the flue gas to the emission standard.

[0038] refer to Figures 1 to 4 As shown, a smoke outlet pipe 24 is provided on the top of the tower body 20 , and the smoke outlet pipe 24 facilitates the smoke to be discharged from the tower body 20 .

[0039] It should be noted that the flue gas purification equipment disclosed in the above embodiment is applied to the flue gas purification of waste incinerators, and belongs to the field of waste incineration flue gas treatment equipment. The water pump, electric push rod one and electric push rod two control equipment and control system involved in the above structure are all technologies, and the principles have been made public, so no further introduction will be given here.

[0040] The implementation principle of the flue gas purification device for a large-scale garbage incinerator in the embodiment of the present application is as follows: when in use, the water inlet pipe 8 is connected to the cooling water delivery pipe, and then the cooling water return pipe is connected to the water outlet pipe 9, so as to form a heat exchange loop, and then the garbage is put into the combustion furnace 1 for combustion, and then the flue gas will enter the main smoke pipe 2 and pass through the filter box 12. At this time, the coarse filter 13 in the filter box 12 can effectively filter the large particles of dust in the flue gas, and the filtered flue gas will enter the heat preservation heat exchange box 3 The cold zone cooling water flowing in the U-shaped heat exchange tube 7 will exchange heat with the high-temperature flue gas, thereby heating the cooling water, thereby realizing heat recovery of the flue gas, and then the flue gas after heat exchange enters the smoke pipe 4, and then is sent to the spray tower 5. At this time, the purified water at the bottom of the tower body 20 is pumped from the water supply pipe 22 into the spray pipe 25, and the purified water is sprayed out by the spray pipe 25, so as to spray and purify the flue gas, and at the same time, the packing layer 21 is used to filter the flue gas, so as to purify the flue gas to the emission standard;

[0041] When maintaining the filter box 12, the personnel can disassemble the connecting plate 18, thereby taking out the mounting frame 19 from the filter box 12, and then taking out the coarse filter screen 13 from the filter box 12 for cleaning;

[0042] When maintaining the heat exchange equipment, the personnel can start the electric push rod 10 to drive the scraper 11 to move, so as to scrape and clean the soot accumulated on the U-shaped heat exchange tube 7, and the soot will fall to the bottom of the heat exchange box 3. Then the personnel open the box door 14, and then start the electric push rod 2 15 to drive the blade 16 to move, and then push the cleaned soot in the heat exchange box 3 out of the heat exchange box 3, so as to automatically clean the heat exchange box 3, which is convenient to use.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flue gas purification device for a large-scale garbage incinerator, comprising a garbage combustion furnace (1), characterized in that: The upper part of the combustion furnace (1) is connected to a main smoke pipe (2), the gas outlet end of the main smoke pipe (2) is connected to a heat preservation and heat exchange box (3), the top of the heat preservation and heat exchange box (3) is connected to a secondary smoke pipe (4), the gas outlet end of the secondary smoke pipe (4) is connected to a spray tower (5), and a fan (6) is provided on the secondary smoke pipe (4); The heat-insulating heat exchange box (3) is provided with a plurality of U-shaped heat exchange tubes (7), one end of the U-shaped heat exchange tube (7) is welded with a water inlet pipe (8), and the other end of the U-shaped heat exchange tube (7) is welded with a water outlet pipe (9), the heat-insulating heat exchange box (3) is fixedly connected with an electric push rod (10), the piston rod of the electric push rod (10) is fixedly connected with a scraper (11), and the scraper (11) is slidably connected to the U-shaped heat exchange tube (7); A filter box (12) is arranged on the main smoke pipe (2), and a coarse filter screen (13) is arranged inside the filter box (12).

2. A flue gas purification device for a large-scale waste incinerator as claimed in claim 1, characterized in that: A box door (14) is hingedly connected to one side of the lower part of the heat preservation and heat exchange box (3).

3. A flue gas purification device for a large-scale waste incinerator as claimed in claim 1, characterized in that: The lower part of the heat preservation and heat exchange box (3) is fixedly connected to an electric push rod 2 (15), and the piston rod of the electric push rod 2 (15) is fixedly connected to a push plate (16).

4. A flue gas purification device for a large-scale waste incinerator as claimed in claim 3, characterized in that: Guide rods (17) are fixedly connected to both sides of the push plate (16), and the guide rods (17) are slidably connected to the side walls of the heat preservation and heat exchange box (3).

5. The flue gas purification equipment for a large-scale waste incinerator according to claim 1, characterized in that: The bottom of the filter box (12) is fixedly connected to a connecting plate (18) by means of bolts, and a mounting frame (19) is fixedly connected to the connecting plate (18). The mounting frame (19) can be inserted into the filter box (12), and the coarse filter screen (13) is fixedly mounted on the mounting frame (19).

6. A flue gas purification device for a large-scale waste incinerator as claimed in claim 1, characterized in that: The spray tower (5) comprises a tower body (20), a spray pipe (25) and a packing layer (21) are arranged in the tower body (20), a water supply pipe (22) is connected to the lower part of the tower body (20), the water supply pipe (22) is connected to the spray pipe (25), and a water pump (23) is arranged on the water inlet side of the water supply pipe (22).

7. A flue gas purification device for a large-scale waste incinerator as claimed in claim 6, characterized in that: A smoke outlet pipe (24) is provided on the top of the tower body (20).

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