Furnace gas waste heat recovery device for soda ash production calcining furnace

Abstract

The utility model discloses a furnace gas waste heat recovery device for a soda ash production calcining furnace, which relates to the technical field of soda ash production, and is characterized in that the furnace gas waste heat recovery device for the soda ash production calcining furnace comprises a shell, and a spray head is mounted at the top of the shell; the sliding frame is fixed on the inner side wall of the shell; according to the furnace gas waste heat recovery device of the soda ash production calcining furnace, when ventilation is conducted through the air inlet of the shell, the movable gas distribution disc is ejected upwards through air pressure, smoke is evenly distributed, meanwhile, due to the fact that the gas distribution disc is in the upwards-protruding type dome shape, the gas distribution disc is not prone to falling off, and the waste heat recovery effect is good. Part of smoke which cannot pass through the air holes in time rises from top to bottom, rises along the bottom of the circular top disc and gathers to the middle convex part, heat loss generated when the smoke is attached to the wall of the shell is reduced, when air supply is stopped, the movable air distribution disc falls onto the fixed air distribution disc under the action of the gravity of the movable air distribution disc, the insertion rods are inserted into the air holes, dirt such as alkali dust in the air holes is dredged, and the dust removal effect is improved. The anti-blocking performance is excellent.

Description

Technical Field

[0001] This utility model relates to the field of soda ash production technology, and more specifically, it relates to a waste heat recovery device for soda ash production calcining furnace gas. Background Technology

[0002] Currently, when soda ash production enterprises use self-owned thermal power plants and ion desalination units in their water treatment workshops to prepare demineralized water, the freshwater temperature needs to be kept stable at 20-25℃ year-round to meet the temperature requirements for preparing demineralized water. In the winter, when temperatures are low, hot steam is used to heat the water to ensure normal production, which consumes a large amount of steam energy. The furnace gas produced by the combustion furnace has a certain temperature, so it can be connected to the calcination furnace gas in soda ash production to replace the steam and achieve heat exchange with the demineralized water. The waste heat recovery of the furnace gas requires a heat exchanger.

[0003] Existing heat exchangers for furnace gas waste heat recovery include shell and tube heat exchangers, double-tube heat exchangers, serpentine heat exchangers (such as immersion serpentine heat exchangers), and finned tube heat exchangers. Among them, serpentine heat exchangers are divided into immersion type and spray type. The former has a simple structure but low heat transfer efficiency, while the latter enhances heat transfer by spraying cooling water.

[0004] Existing waste heat recovery devices for soda ash production calcining furnace gas, such as spray-type serpentine heat exchangers, involve introducing furnace gas into the serpentine heat exchanger and spraying demineralized water on the outside for heat exchange. This is suitable for applications with relatively clean furnace gas. However, soda ash production calcining furnaces contain a large amount of dirt and alkali dust. Even after filtration by external filtration components such as bag filters, tiny alkali dust particles still enter the heat exchange tubes with the flue gas, adhering firmly to the inner wall of the metal tubes. This is difficult to clean and, over time, can cause the inner wall of the heat exchange tubes to thicken, reducing heat exchange efficiency. Therefore, to solve the above technical problems, this application proposes a waste heat recovery device for soda ash production calcining furnace gas. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a waste heat recovery device for the furnace gas of soda ash production calcining furnace, so as to solve the technical problem that the heat exchange performance of the existing waste heat recovery device for soda ash production calcining furnace is prone to decline after long service time.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery device for calcining furnace gas in soda ash production, comprising a shell, wherein a nozzle is installed on the top of the shell;

[0007] The carriage is fixed to the inner wall of the housing;

[0008] A movable air distribution plate is slidably connected to the inner wall of the carriage. The movable air distribution plate includes a first arc-shaped top plate. A number of first air holes are opened on the surface of the first arc-shaped top plate. A number of first insert rods are fixedly installed at the bottom of the first arc-shaped top plate. The first insert rods and the first air holes are arranged alternately.

[0009] A fixed air distribution plate is fixed to the bottom of the slide. The fixed air distribution plate includes a second arc-shaped top plate. The surface of the second arc-shaped top plate is provided with a number of second air holes. A number of second insert rods are fixedly installed on the top surface of the second arc-shaped top plate. The second insert rods and the second air holes are arranged alternately.

[0010] The first insertion rod can be matched with the second air hole, and the second insertion rod can be matched with the first air hole.

[0011] Furthermore, the nozzle inlet is connected to a water pipe, and a valve is installed on the water pipe.

[0012] Furthermore, the top and bottom of the housing are respectively provided with an air outlet and a first drain outlet, and the outer side wall of the housing is provided with a second drain outlet and an air inlet. The second drain outlet and the air inlet are respectively distributed at both ends of the fixed air distribution plate, with the air inlet close to the first drain outlet and the second drain outlet close to the air outlet.

[0013] Furthermore, the carriage includes sliding columns arranged in a circumferentially equidistant array mounted on the inner sidewall of the housing, with a top ring fixed to the top of each sliding column.

[0014] Furthermore, a first side ring is fixed to the outer wall of the first arc-shaped top plate, and a sliding groove is provided on the outer wall of the first side ring corresponding to the sliding column. The first side ring is slidably connected to the outer wall of the sliding column through the sliding groove. A second side ring is fixed to the outer wall of the second arc-shaped top plate and is fixed to the inner wall of the shell through the second side ring.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The waste heat recovery device for soda ash production calcining furnace gas disclosed in this utility model, when gas is introduced through the air inlet of the shell, the air pressure pushes the movable gas distribution plate upward, distributing the flue gas evenly. At the same time, because the gas distribution plate is convex dome-shaped, some of the flue gas that cannot pass through the air holes rises from top to bottom, rises along the bottom of the dome plate, and gathers to the middle convex part, reducing the heat loss caused by the flue gas adhering to the shell wall. When the gas supply stops, the movable gas distribution plate falls onto the fixed gas distribution plate under its own gravity, and the insert rod is inserted into the air hole to clear the alkali dust and other dirt in the air hole, with excellent anti-clogging performance. This solves the problem that the heat exchange performance of the existing waste heat recovery device for soda ash production calcining furnace gas tends to decline after long-term use. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the connection structure of the slide, the movable air distribution plate and the fixed air distribution plate when the movable air distribution plate of this utility model is in the raised state;

[0020] Figure 3 This is a cross-sectional structural diagram of the slide, movable air distribution plate, and fixed air distribution plate when the movable air distribution plate is in the raised state of this utility model;

[0021] Figure 4 This is a schematic diagram of the overall structure of this utility model.

[0022] 1. Housing; 2. Nozzle; 3. Water pipe; 4. Air outlet; 5. Carriage; 6. Movable air distribution plate; 7. Fixed air distribution plate; 8. First drain outlet; 9. Valve; 10. Second drain outlet; 11. Air inlet;

[0023] 501. Sliding column; 502. Top ring;

[0024] 601. First side ring; 602. Slide groove; 603. First arc-shaped top plate; 604. First air hole; 605. First insert rod;

[0025] 701. Second side ring; 702. Second circular top plate; 703. Second air hole; 704. Second insert rod. Detailed Implementation

[0026] like Figure 1-4 As shown, this utility model provides a waste heat recovery device for calcining furnace gas in soda ash production, including a shell 1, a nozzle 2 installed on the top of the shell 1, a water pipe 3 connected to the water inlet of the nozzle 2, a valve 9 installed on the water pipe 3, and an external demineralized water supply assembly that can evenly spray demineralized water into the interior of the shell 1 through the nozzle 2, and a slide 5 fixed to the inner wall of the shell 1. The slide 5 includes sliding columns 501 installed in a circumferentially equidistant array on the inner wall of the shell 1, and a top ring 502 fixed to the top of the sliding columns 501.

[0027] Furthermore, the movable air distribution plate 6 is slidably connected to the inner wall of the slide frame 5. The movable air distribution plate 6 includes a first arc-shaped top plate 603. The surface of the first arc-shaped top plate 603 is provided with a plurality of first air holes 604. A plurality of first insert rods 605 are fixedly installed at the bottom of the first arc-shaped top plate 603. The first insert rods 605 and the first air holes 604 are arranged alternately. A first side ring 601 is fixed on the outer wall of the first arc-shaped top plate 603. A sliding groove 602 is provided on the outer wall of the first side ring 601 corresponding to the sliding column 501. The first side ring 601 is slidably connected to the outer wall of the sliding column 501 through the sliding groove 602.

[0028] Furthermore, a fixed air distribution plate 7 is fixed to the bottom of the slide 5. The fixed air distribution plate 7 includes a second arc-shaped top plate 702. The surface of the second arc-shaped top plate 702 is provided with a number of second air holes 703. A number of second insert rods 704 are fixedly installed on the top surface of the second arc-shaped top plate 702. The second insert rods 704 and the second air holes 703 are arranged alternately. A second side ring 701 is fixed to the outer side wall of the second arc-shaped top plate 702 and is fixed to the inner side wall of the housing 1 through the second side ring 701. When air is introduced from the air inlet 11 of the housing 1, the air pressure pushes the movable air distribution plate 6 upward, and rises from the leaked first air hole 604 and second air hole 703 to the upper part of the housing 1, where it exchanges heat with the demineralized water sprayed by the nozzle 2.

[0029] The first insertion rod 605 can be matched with the second air hole 703, and the second insertion rod 704 can be matched with the first air hole 604. They can cooperate with each other. When the air supply stops, the movable air distribution plate 6 falls onto the fixed air distribution plate 7 under its own weight. The insertion rods are inserted into the air holes to clear the alkaline dust and other dirt in the air holes, and the anti-clogging performance is excellent.

[0030] Furthermore, the top and bottom of the shell 1 are respectively provided with an air outlet 4 and a first drain outlet 8, and the outer side wall of the shell 1 is provided with a second drain outlet 10 and an air inlet 11. The second drain outlet 10 and the air inlet 11 are respectively distributed at both ends of the fixed air distribution plate 7. The air inlet 11 is close to the first drain outlet 8, and the second drain outlet 10 is close to the air outlet 4. Since the air distribution plate is convex dome-shaped, some of the flue gas that cannot pass through the air holes rises from top to bottom, rises along the bottom of the dome plate, and gathers to the middle convex part, reducing the heat loss caused by the flue gas sticking to the wall of the shell 1.

[0031] Working principle: When the waste heat recovery device for soda ash production calcining furnace gas disclosed in this utility model is supplied with gas through the air inlet 11 of the shell 1, the gas pressure pushes the movable gas distribution plate 6 upward, distributing the flue gas evenly. At the same time, because the gas distribution plate is convex dome-shaped, some of the flue gas that cannot pass through the air holes rises from top to bottom, rises along the bottom of the dome plate, and gathers in the middle convex part, reducing the heat loss caused by the flue gas adhering to the wall of the shell 1. When the gas supply stops, the movable gas distribution plate 6 falls to the fixed gas distribution plate under its own gravity. 7. The insert rod is inserted into the air hole to clear alkaline dust and other dirt in the air hole, with excellent anti-clogging performance. First, the first drain port 8 at the bottom of the shell 1 is blocked with a sealing plug to keep the inside of the shell 1 sealed. Flue gas is introduced from the air inlet 11. The air pressure pushes the movable air distribution plate 6 upward. When the movable air distribution plate 6 slides upward along the slide 5, both the first air hole 604 and the second air hole 703 leak out. The flue gas rises from the first air hole 604 and the second air hole 703 into the upper part of the shell 1 and exchanges heat with the demineralized water sprayed by the nozzle 2. The flue gas is then discharged from the outlet, distributing it evenly. Because the air distribution plate is a convex dome shape, some flue gas that cannot pass through the air holes rises from top to bottom, flows upward along the bottom of the dome plate, and gathers at the central convex part, reducing heat loss caused by the flue gas adhering to the wall of the shell 1. The demineralized water, after heat exchange, is discharged from the second drain outlet 10 under its own gravity. Some of the demineralized water will fall into the bottom of the shell 1 along the first air hole 604 and the second air hole 703, and can be discharged after heat exchange. Even if the demineralized water is active... When the movable air distribution plate 6 and the fixed air distribution plate 7 are submerged, and flue gas is introduced into the air inlet 11, the air pressure will still push the movable air distribution plate 6 open, and the water that has overflowed the second drain outlet 10 can be discharged from the second drain outlet 10. When the air supply stops, the movable air distribution plate 6 falls onto the fixed air distribution plate 7 under its own weight. The first insertion rod 605 can be matched with the second air hole 703, and the second insertion rod 704 can be matched with the first air hole 604. The insertion rods are inserted into the corresponding air holes to clear the alkaline dust and other dirt in the air holes, and the anti-clogging performance is excellent.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A waste heat recovery device for calcining furnace gas in soda ash production, characterized in that, Includes a housing (1), on the top of which a nozzle (2) is mounted; The carriage (5) is fixed to the inner wall of the housing (1); The movable air distribution plate (6) is slidably connected to the inner wall of the slide frame (5). The movable air distribution plate (6) includes a first arc-shaped top plate (603). The surface of the first arc-shaped top plate (603) is provided with a plurality of first air holes (604). A plurality of first insert rods (605) are fixedly installed at the bottom of the first arc-shaped top plate (603). The first insert rods (605) and the first air holes (604) are arranged alternately. A fixed air distribution plate (7) is fixed to the bottom of the slide (5). The fixed air distribution plate (7) includes a second arc-shaped top plate (702). The surface of the second arc-shaped top plate (702) is provided with a number of second air holes (703). A number of second insert rods (704) are fixedly installed on the top surface of the second arc-shaped top plate (702). The second insert rods (704) and the second air holes (703) are arranged alternately. The first insertion rod (605) can be matched with the second air hole (703), and the second insertion rod (704) can be matched with the first air hole (604).

2. The waste heat recovery device for soda ash production calcining furnace gas according to claim 1, characterized in that: The nozzle (2) is connected to a water pipe (3) at its inlet, and a valve (9) is installed on the water pipe (3).

3. The waste heat recovery device for soda ash production calcining furnace gas according to claim 2, characterized in that: The top and bottom of the housing (1) are respectively provided with an air outlet (4) and a first drain outlet (8). The outer side wall of the housing (1) is provided with a second drain outlet (10) and an air inlet (11). The second drain outlet (10) and the air inlet (11) are respectively distributed at both ends of the fixed air distribution plate (7). The air inlet (11) is close to the first drain outlet (8), and the second drain outlet (10) is close to the air outlet (4).

4. The waste heat recovery device for soda ash production calcining furnace gas according to claim 3, characterized in that: The slide (5) includes slide columns (501) arranged in a circumferentially equidistant array on the inner side wall of the housing (1), and a top ring (502) is fixed to the top of the slide column (501).

5. The waste heat recovery device for soda ash production calcining furnace gas according to claim 4, characterized in that: The outer wall of the first arc-shaped top plate (603) is fixed with a first side ring (601). The outer wall of the first side ring (601) is provided with a sliding groove (602) corresponding to the sliding column (501). The first side ring (601) is slidably connected to the outer wall of the sliding column (501) through the sliding groove (602). The outer wall of the second arc-shaped top plate (702) is fixed with a second side ring (701) and is fixed to the inner wall of the shell (1) through the second side ring (701).

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