A waste heat recovery device for gypsum production

Abstract

The present application relates to a kind of waste heat recovery equipment for gypsum production, comprising: heat exchange container, at least one gas guide pipe is fixedly connected between both ends thereof, and its side is fixedly connected with the fixed washer that can be moved to the inner side wall of the rotary kiln tail gas exhaust pipe;Several elastic bellows are respectively connected to the front side of the heat exchange container, the side of the elastic bellows not connected to the heat exchange container is respectively connected to the corresponding backwater pipe, the back side of the heat exchange container is outwardly connected with a water inlet pipe provided with a water inlet valve;Dust removal device includes filter fixedly installed in the rotary kiln tail gas exhaust pipe of the backwater pipe front side, the bottom of the rotary kiln tail gas exhaust pipe of the filter front side is downwardly connected with a dust removal pipe provided with a dust removal valve.The present application can effectively ensure the exchange effect of waste heat recovery, and can effectively assist to improve the smoothness of rotary kiln tail gas emission.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of waste heat recovery equipment for gypsum production, which can form heat exchange with the high-temperature tail gas of rotary kiln for gypsum production, to recycle the waste heat of high-temperature tail gas of rotary kiln, and can assist to improve the emission smoothness of rotary kiln tail gas. BACKGROUND

[0002] In the gypsum production line, a large amount of heat energy is consumed during the operation of the rotary kiln. In the traditional process, the high-temperature flue gas generated during the operation of the rotary kiln is mostly directly discharged, resulting in low energy utilization rate and significant environmental load. In order to reduce energy consumption and environmental damage caused by high-temperature tail gas emission, a heat exchange device for waste heat recovery in gypsum production is used to continuously circulate external water through the tail gas exhaust pipe of the rotary kiln for gypsum production, thereby heating the external water and recycling it to realize waste heat recovery.

[0003] The existing waste heat recovery equipment for gypsum production mainly includes heat exchange coils or heat exchange vessels fixedly installed in the tail gas exhaust pipe of the rotary kiln. The external water continuously circulates through the heat exchange coils or heat exchange vessels to exchange heat with the tail gas discharged from the rotary kiln, thereby increasing the temperature of the water to form hot water, achieving the effect of waste heat recovery. In order to ensure that dust particles in the rotary kiln tail gas do not directly enter the environment, the existing waste heat recovery equipment for gypsum production generally has a corresponding physical filter at the gas outlet. The installation of the physical filter increases the flow resistance of the tail gas, resulting in the need for additional exhaust fans on the tail gas exhaust pipe of the rotary kiln. This not only increases the operating cost of the equipment, but also significantly increases the maintenance cost of the exhaust fans used in high-temperature and high-dust environments, which is not suitable for modern production and processing.

[0004] Therefore, the purpose of this application is to design a waste heat recovery equipment for gypsum production that can effectively ensure the exchange effect of waste heat recovery and effectively assist in improving the emission smoothness of the rotary kiln tail gas. SUMMARY

[0005] In view of the technical problems existing in the prior art, the present application provides a waste heat recovery equipment for gypsum production, which can effectively solve the technical problems existing in the prior art.

[0006] The technical solution of the present application is:

[0007] A waste heat recovery equipment for gypsum production, comprising:

[0008] The heat exchange container is movably arranged in the corresponding rotary kiln tail gas exhaust pipe, at least one gas guide pipe is fixedly connected between the two ends of the heat exchange container, a corresponding exhaust valve is fixedly installed on the gas guide pipe, the side of the heat exchange container is arranged in a spaced manner with the rotary kiln tail gas exhaust pipe, and a fixed gasket movably abutting to the inner side wall of the rotary kiln tail gas exhaust pipe is fixedly connected to the side of the heat exchange container.

[0009] A plurality of elastic bellows are respectively connected to the front side of the heat exchange container, one side of the elastic bellows not connected to the heat exchange container is respectively connected to a corresponding water return pipe, a corresponding water return valve is fixedly installed on the water return pipe, and a water inlet pipe provided with a water inlet valve is connected to the rear side of the heat exchange container.

[0010] The dust removal device comprises a filter fixedly installed in the rotary kiln tail gas exhaust pipe on the front side of the water return pipe, and the bottom of the rotary kiln tail gas exhaust pipe on the front side of the filter is connected downwardly to a dust removal pipe provided with a dust removal valve.

[0011] The water inlet pipe is connected to a municipal tap water source, and the dust removal valve is in a normally closed state; after the water return valve and the exhaust valve are closed, the water inlet valve is opened, municipal tap water enters the heat exchange container under the action of pipe network pressure, with the increase of water pressure in the heat exchange container, the elastic bellows are stretched, the heat exchange container moves backward to suck the tail gas in front of the filter through the filter; after the water inlet valve is closed, the water return valve and the exhaust valve are opened, the elastic bellows restore deformation under the action of elastic force, the heat exchange container moves forward, the tail gas is discharged after heat exchange with the water body in the heat exchange container through the gas guide pipe, and the water body in the elastic bellows is discharged through the water return pipe for use.

[0012] After the heat exchange container moves to the position, the water return valve and the dust removal valve are opened simultaneously after the water inlet valve and the exhaust valve are closed simultaneously, the elastic bellows restore deformation under the action of elastic force, the heat exchange container moves forward to push the tail gas on the rear side of the filter to the front side of the filter, so as to backflush the filter and discharge the backflushed dust along the dust removal pipe.

[0013] The upper and lower ends of the rotary kiln tail gas exhaust pipe are fixedly connected with corresponding guide rails respectively, and the heat exchange container is provided with a sliding groove matched with the guide rail respectively, so that the heat exchange container is movably arranged in the rotary kiln tail gas exhaust pipe through cooperation of the sliding groove and the guide rail.

[0014] The outer side of the elastic bellows is fixedly sleeved with a corresponding spiral spring respectively, and the two ends of the spiral spring are connected to the water return pipe and the heat exchange container respectively.

[0015] The filter comprises a fixed frame and a filter cloth fixed to the fixed frame.

[0016] The dust removal pipe is downwardly fixed with a corresponding dust collection bag.

[0017] The air guide pipe is fixed with corresponding isolation pipes in a spaced manner, the front end of the isolation pipe is sealingly fixed to the front end of the heat exchange container, and the rear end of the isolation pipe is spaced from the rear end of the heat exchange container.

[0018] The water inlet end of the water inlet pipe extends to the front end of the heat exchange container and is fixed with a water distribution plate arranged in a groove shape.

[0019] The elastic bellows are connected to the spaces between the isolation pipes and the air guide pipes.

[0020] Compared with the prior art, the application has the following advantages and positive effects:

[0021] 1) The movable arrangement of the heat exchange container and the addition of the fixed gasket effectively enable the heat exchange container to form a certain piston effect during movement, and the intervention of the elastic bellows effectively drives the heat exchange container through the elastic deformation force without affecting the water flow.

[0022] During use, the dust removal valve is in a normally closed state, the water return valve and the exhaust valve are closed, the water inlet valve is opened, and municipal tap water enters the heat exchange container through the water inlet pipe under the action of the pipe network pressure. As the water pressure in the heat exchange container increases, the elastic bellows are stretched, and the heat exchange container moves backward to suck the exhaust gas in front of the filter through the filter. Then, the water inlet valve is closed, the water return valve and the exhaust valve are opened, the elastic bellows recover under the action of the elastic force, the heat exchange container moves forward, the exhaust gas is discharged after heat exchange with the water in the heat exchange container through the air guide pipe, and the water in the elastic bellows is discharged through the water return pipe for use. Without increasing energy consumption, the application effectively assists in improving the smoothness of the rotary kiln exhaust gas discharge, and under the action of the large heat exchange contact surface of the elastic bellows and the air guide pipe, the heat exchange effect can be effectively ensured to ensure the waste heat recovery effect of the application.

[0023] 2) After the heat exchange container moves backward to the position, the water inlet valve and the exhaust valve are closed, and the water return valve and the dust removal valve are opened. At this time, the elastic bellows recover under the action of the elastic force, and the heat exchange container moves forward to push the exhaust gas behind the filter to the front side of the filter to backflush the filter, and the dust after backflushing is discharged along the dust removal pipe. Without increasing energy consumption, the application effectively realizes backflushing of the filter, thereby further effectively assisting in improving the smoothness of the rotary kiln exhaust gas discharge.

[0024] 3) The upper and lower ends of the rotary kiln exhaust pipe of the present invention are respectively fixedly connected to corresponding guide rails, and the heat exchange container is respectively provided with sliding grooves adapted to the guide rails. The heat exchange container is movably installed in the rotary kiln exhaust pipe by the cooperation of the sliding grooves and the guide rails, so as to ensure that the rotary kiln exhaust pipe can form a stable moving installation for the heat exchange container with a large load, thus ensuring the practical effect of the present invention. Furthermore, the outer side of the elastic bellows of the present invention is respectively fixedly fitted with corresponding helical springs. The two ends of the helical springs are respectively connected to the return water pipe and the heat exchange container. The helical springs cooperate with the elastic bellows to ensure that the heat exchange container after being moved backward can be smoothly reset under the elastic force of the two, thus further ensuring the practical effect of the present invention.

[0025] 4) Corresponding isolation pipes are fixedly fitted onto the air guide pipes of the present invention at intervals. The front ends of the isolation pipes are sealed and fixed to the front ends of the heat exchange container, and the rear ends are spaced apart from the rear ends of the heat exchange container. The water inlet end of the water inlet pipe extends to the front end of the heat exchange container and is fixedly connected to a water distribution plate arranged in a groove. In addition, elastic corrugated pipes are connected to the intervals between the isolation pipes and the air guide pipes. After the external water source enters the heat exchange container, it can pre-push the water already stored in the heat exchange container into the interval between the isolation pipes and the air guide pipes, and then push the water originally stored between the isolation pipes and the air guide pipes outward into the elastic corrugated pipes before finally outputting it. In this way, it can be ensured that the external water source can fully contact the high-temperature exhaust gas before being discharged, preventing the high-temperature water in the heat exchange area from being in a non-circulating state and affecting the heat exchange effect, thereby further improving the heat exchange efficiency of the present invention and further ensuring the waste heat recovery effect of the present invention. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention.

[0027] Figure 2 This is a cross-sectional view of the present invention.

[0028] Figure 3 This is a schematic diagram of the structure after removing the rotary kiln exhaust pipe of the present invention.

[0029] Figure 4 for Figure 3 A magnified view of part A in the image.

[0030] Figure 5 This is a schematic diagram of a structure with a water distribution plate connected to the water inlet pipe.

[0031] In the drawings: heat exchange container 1, fixed gasket 101, rotary kiln tail gas exhaust pipe 2, gas guide pipe 3, exhaust valve 301, elastic bellows 4, backwater pipe 5, backwater valve 501, water inlet pipe 6, water inlet valve 601, dust removal device 7, filter 701, fixed frame 7011, filter cloth 7012, dust removal pipe 702, dust removal valve 7021, guide rail 8, coil spring 9, dust collection bag 10, isolation pipe 11, water distribution plate 12. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0033] Reference Figures 1-5 A waste heat recovery equipment for gypsum production, comprising:

[0034] The heat exchange container 1 is movably arranged in the corresponding rotary kiln tail gas exhaust pipe 2, at least one gas guide pipe 3 is penetrated and fixed between the two ends of the heat exchange container 1, the corresponding exhaust valve 301 is fixedly installed on the gas guide pipe 3, the side of the heat exchange container 1 is spaced apart from the rotary kiln tail gas exhaust pipe 2, and the side of the heat exchange container 1 is fixedly connected with the fixed gasket 101 which can be movably abutted to the inner side wall of the rotary kiln tail gas exhaust pipe 2;

[0035] A plurality of elastic bellows 4 are respectively connected to the front side of the heat exchange container 1, one side of the elastic bellows 4 which is not connected to the heat exchange container 1 is respectively connected to the corresponding backwater pipe 5, the corresponding backwater valve 501 is respectively fixedly installed on the backwater pipe 5, and the rear side of the heat exchange container 1 is outwardly connected with the water inlet pipe 6 which is provided with the water inlet valve 601;

[0036] The dust removal device 7 comprises the filter 701 which is fixedly installed in the rotary kiln tail gas exhaust pipe 2 in front of the backwater pipe 5, and the bottom of the rotary kiln tail gas exhaust pipe 2 in front of the filter 701 is downwardly connected with the dust removal pipe 702 which is provided with the dust removal valve 7021.

[0037] The water inlet pipe 6 is connected to a municipal water source, and the dust removal valve 7021 is in a normally closed state; after the water return valve 501 and the exhaust valve 301 are closed, the water inlet valve 601 is opened, and municipal tap water enters the heat exchange container 1 under the action of pipe network pressure, and as the water pressure in the heat exchange container 1 increases, the elastic corrugated pipe 4 is stretched, and the heat exchange container 1 moves backward to suck the tail gas in front of the filter 701 through the filter 701; after the water inlet valve 601 is closed, the water return valve 501 and the exhaust valve 301 are opened, the elastic corrugated pipe 4 restores deformation under the action of elastic force, the heat exchange container 1 moves forward, and the tail gas is discharged after heat exchange with the water body in the heat exchange container 1 through the gas guide pipe 3, and the water body in the elastic corrugated pipe 4 is discharged through the water return pipe 5 for use.

[0038] After the heat exchange container 1 moves to the position, the water inlet valve 601 and the exhaust valve 301 are closed at the same time, the water return valve 501 and the dust removal valve 7021 are opened at the same time, the elastic corrugated pipe 4 restores deformation under the action of elastic force, the heat exchange container 1 moves forward to push the tail gas on the back side of the filter 701 to the front side of the filter 701, so as to backflush the filter 701, and the backflushed dust is discharged along the dust removal pipe 702.

[0039] The heat exchange container 1 can form a certain piston effect in the moving process by the movable arrangement of the heat exchange container 1 and the addition of the fixed washer 101, and the heat exchange container 1 is further driven by the elastic deformation force without affecting the water flow by the intervention of the plurality of elastic corrugated pipes 4.

[0040] In use, the dust removal valve 7021 is in a normally closed state, the water inlet valve 601 is opened after the water return valve 501 and the exhaust valve 301 are closed, municipal tap water enters the heat exchange container 1 under the action of pipe network pressure, the elastic corrugated pipe 4 is stretched as the water pressure in the heat exchange container 1 increases, and the heat exchange container 1 moves backward to suck the tail gas in front of the filter 701 through the filter 701; then, the water inlet valve 601 is closed, the water return valve 501 and the exhaust valve 301 are opened, the elastic corrugated pipe 4 restores deformation under the action of elastic force, the heat exchange container 1 moves forward, the tail gas is discharged after heat exchange with the water body in the heat exchange container 1 through the gas guide pipe 3, and the water body in the elastic corrugated pipe 4 is discharged through the water return pipe 5 for use. Under the premise of not increasing energy consumption, the discharge smoothness of the rotary kiln tail gas is effectively assisted to be improved, and under the action of the large heat exchange contact surface of the elastic corrugated pipe 4 and the gas guide pipe 3, the heat exchange effect can be effectively ensured, so as to ensure the waste heat recovery effect of the application.

[0041] The water inlet valve 601 and the exhaust valve 301 can be closed simultaneously and the backwater valve 501 and the dust removal valve 7021 can be opened simultaneously after the heat exchange container 1 is moved backward to the position, at this time, the elastic bellows 4 restores the deformation under the elastic force, and the heat exchange container 1 is moved forward to push the tail gas at the rear side of the filter 701 to the front side of the filter 701, so as to perform backflushing on the filter 701, and the dust after backflushing is discharged along the dust removal pipe 702, so that the backflushing operation on the filter 701 is effectively realized without increasing the energy consumption, thereby further effectively assisting to improve the smoothness of the rotary kiln tail gas discharge.

[0042] The upper and lower ends of the rotary kiln tail gas exhaust pipe 2 are respectively fixedly connected with corresponding guide rails 8, and the heat exchange container 1 is respectively provided with sliding grooves matched with the guide rails 8, so that the heat exchange container 1 can be movably installed in the rotary kiln tail gas exhaust pipe 2 through cooperation of the sliding grooves and the guide rails.

[0043] Under the support of the guide rails 8, it is ensured that the rotary kiln tail gas exhaust pipe 2 can form stable and movable installation on the heat exchange container 1 with large weight, so as to ensure the practical effect of the application, and the cooperation of the spiral springs 9 and the elastic bellows 4 ensures that the heat exchange container 1 after moving backward to the position can be reset smoothly under the elastic force of the two, so as to further ensure the practical effect of the application.

[0044] The filter 701 comprises a fixed frame 7011 and a filter cloth 7012 fixedly connected to the fixed frame 7011. The dust removal pipe 702 is fixedly connected with a corresponding dust collection bag 10 downward.

[0045] The air guide pipe 3 is respectively fixedly sleeved with corresponding isolation pipes 11 in a spaced manner, the front ends of the isolation pipes 11 are respectively sealingly fixed to the front end of the heat exchange container 1, and the rear ends of the isolation pipes 11 are respectively arranged in a spaced manner with the rear end of the heat exchange container 1. The water inlet end of the water inlet pipe 6 extends to the front end of the heat exchange container 1 and is fixedly connected with a water distribution plate 12 arranged in a groove shape. The elastic bellows 4 are respectively connected at the intervals of the isolation pipes 11 and the air guide pipe 3.

[0046] The gas guide pipe 3 of the application is respectively fixed with corresponding isolation pipes 11 in a spaced state, and the water inlet end of the water inlet pipe 6 extends to the front end of the heat exchange container 1 and is fixed with a water distribution plate 12 arranged in a groove shape; in addition, the elastic bellows 4 are respectively connected to the spaces between the isolation pipes 11 and the gas guide pipe 3. After the external water source enters the heat exchange container 1, it can first press the water originally stored in the heat exchange container 1 into the spaces between the isolation pipes 11 and the gas guide pipe 3, then press the water originally stored between the isolation pipes 11 and the gas guide pipe 3 into the elastic bellows 4, and finally output. In this way, it can ensure that the external water source can be fully contacted with the high-temperature tail gas and then discharged, so as to prevent the high-temperature water in the heat exchange area from being in a non-flowing state and affecting the heat exchange effect, thereby further improving the heat exchange efficiency of the application and further ensuring the waste heat recovery effect of the application.

[0047] The above is only a preferred embodiment of the application, and does not limit the application in other forms. Any person skilled in the art can use the disclosed technical content to make changes or modifications to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution content of the application and in accordance with the technical essence of the application still belongs to the protection scope of the technical solution of the application.

Claims

1. A waste heat recovery device for gypsum production, characterized in that, include: A heat exchange container (1) is movably installed inside a corresponding rotary kiln exhaust pipe (2). At least one air guide pipe (3) is fixedly connected between the two ends of the heat exchange container (1). A corresponding exhaust valve (301) is fixedly installed on the air guide pipe (3). The side of the heat exchange container (1) is spaced apart from the rotary kiln exhaust pipe (2). A fixing gasket (101) is fixedly connected to the side of the heat exchange container (1) and is movable and abuts against the inner wall of the rotary kiln exhaust pipe (2). Several flexible corrugated pipes (4) are connected to the front side of the heat exchange container (1). The side of the flexible corrugated pipe (4) not connected to the heat exchange container (1) is connected to the corresponding return water pipe (5). The return water pipe (5) is fixedly installed with the corresponding return water valve (501). The rear side of the heat exchange container (1) is connected to an inlet pipe (6) with an inlet valve (601) installed. The dust removal device (7) includes a filter (701) fixedly installed in the rotary kiln exhaust pipe (2) in front of the return water pipe (5), and a dust removal pipe (702) with a dust removal valve (7021) is connected downward to the bottom of the rotary kiln exhaust pipe (2) in front of the filter (701).

2. The waste heat recovery equipment for gypsum production according to claim 1, characterized in that, The inlet pipe (6) is connected to the municipal water supply, and the dust removal valve (7021) is normally closed. After the return valve (501) and the exhaust valve (301) are closed, the inlet valve (601) is opened, and the municipal tap water enters the heat exchange container (1) through the inlet pipe (6) under the pressure of the pipeline network. As the water pressure in the heat exchange container (1) increases, the elastic corrugated pipe (4) is stretched, and the heat exchange container (1) moves backward to filter ( 701) The exhaust gas at the front is drawn through the filter (701); after the water inlet valve (601) is closed, the return water valve (501) and the exhaust valve (301) are opened, the elastic bellows (4) recovers its deformation under the action of elasticity, the heat exchange container (1) moves forward, the exhaust gas is discharged after heat exchange with the water in the heat exchange container (1) through the air guide pipe (3), and the water in the elastic bellows (4) is discharged through the return water pipe (5) for use.

3. The waste heat recovery equipment for gypsum production according to claim 2, characterized in that, After the heat exchange container (1) moves backward into place, the water inlet valve (601) and the exhaust valve (301) close simultaneously, and the water return valve (501) and the dust removal valve (7021) open simultaneously. The elastic bellows (4) recovers its deformation under the action of elasticity, and the heat exchange container (1) moves forward to push the exhaust gas behind the filter (701) to the front of the filter (701) to backwash the filter (701) and discharge the backwashed dust along the dust removal pipe (702).

4. The waste heat recovery equipment for gypsum production according to claim 1, characterized in that, The upper and lower ends of the rotary kiln exhaust pipe (2) are respectively fixed with corresponding guide rails (8), and the heat exchange container (1) is respectively provided with a sliding groove adapted to the guide rail (8). The heat exchange container (1) is movably installed in the rotary kiln exhaust pipe (2) by the sliding groove cooperating with the guide rail.

5. The waste heat recovery equipment for gypsum production according to claim 1, characterized in that, The outer side of the elastic bellows (4) is fixedly fitted with corresponding helical springs (9), and the two ends of the helical springs (9) are respectively connected to the return water pipe (5) and the heat exchange container (1).

6. The waste heat recovery equipment for gypsum production according to claim 1, characterized in that, The filter (701) includes a fixed frame (7011) and a filter cloth (7012) fixed to the fixed frame (7011).

7. The waste heat recovery equipment for gypsum production according to claim 1, characterized in that, The dust collection pipe (702) is fixed downwards with a corresponding dust collection bag (10).

8. The waste heat recovery equipment for gypsum production according to claim 1, characterized in that, The air guide pipe (3) is fixedly fitted with corresponding isolation pipes (11) at intervals. The front end of the isolation pipe (11) is sealed and fixed to the front end of the heat exchange container (1). The rear end of the isolation pipe (11) and the rear end of the heat exchange container (1) are respectively spaced apart.

9. A waste heat recovery device for gypsum production according to claim 8, characterized in that, The water inlet end of the water inlet pipe (6) extends to the front end of the heat exchange container (1) and is fixedly connected to a water distribution plate (12) arranged in a groove shape.

10. A waste heat recovery device for gypsum production according to claim 8, characterized in that, The elastic bellows (4) are connected to the gap between the isolation tube (11) and the air duct (3).

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