Waste heat recovery device for coking

Abstract

The utility model discloses a waste heat recovery device for coking, which comprises a tank body, the bottom of the tank body is fixedly connected with a supporting seat, the surface of the tank body is provided with a water inlet and a water outlet, the waste heat recovery device further comprises a gas outlet and a blow-off pipe, and a heat exchange device and a filtering device are arranged in the tank body. According to the waste heat recovery device for the high-temperature waste gas for coking, cold water can be continuously added, hot water can be continuously discharged, the phenomenon that in the heating process, hot water needs to be replaced with cold water firstly, and then heating can be conducted through waste heat recovery is avoided, the time spent on replacing hot water with cold water is shortened, and heat waste is reduced; meanwhile, the time spent on waste gas filtration is shortened, and the impurity precipitation speed is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to a waste heat recovery technical field, concretely is a waste heat recovery device for coking. BACKGROUND

[0002] Coking is an important link of modern steel industry, refers to the coking coal is heated to 1000 DEG C under the condition of air isolation, through thermal decomposition and coking produces coke, coke oven gas and other coking chemical products process, and the high temperature waste gas produced by coking still has very high utilization value.

[0003] The existing waste heat recovery device for coking, when heating the cold water, often can only heat the water in the fixed container, after the water in the container is heated, the hot water is poured out, and the cold water is poured in again for heating, the heating mode is more complex, and the waste heat recovery work cannot be carried out during the water change, which causes a lot of heat waste. UTILITY MODEL CONTENT

[0004] (I) technical problem solved

[0005] In view of the deficiency of prior art, the utility model provides a waste heat recovery device for coking, which solves the problem that the existing waste heat recovery device for coking needs to replace the hot water in the container with cold water before heating when heating the cold water.

[0006] (II) technical scheme

[0007] In order to achieve the above purpose, the utility model realizes the following technical scheme: a waste heat recovery device for coking, comprising: a tank body, the tank body bottom is fixedly connected with a support seat, the tank body surface is provided with a water inlet and a drain outlet, further comprising: an air outlet and a blowdown pipe, the tank body is internally provided with a heat exchange device and a filter device, so that the device can continuously add hot water and discharge cold water, reduce the waste of heat in the waste heat recovery process, and reduce the time spent by impurity precipitation in waste gas.

[0008] Preferably, the heat exchange device comprises a heat exchange chamber, the heat exchange chamber is internally provided with a gas inlet pipe and a gas outlet pipe, the inner wall of the heat exchange chamber is provided with a heat preservation layer, the inner wall of the heat preservation layer is fixedly connected with a horizontal plate, the top of the horizontal plate is provided with a first baffle, and the bottom of the horizontal plate is provided with a second baffle, so that the cold water can be layered in a ladder type, the flow speed of the cold water is slowed down, and the heating time of the cold water is increased.

[0009] Preferably, the gas pipe is fixedly connected with the inner wall of the tank body, and one end of the gas pipe penetrates through the tank body and extends into the tank body, the one end of the gas pipe penetrates through the tank body, and the one end of the gas pipe extends into the tank body, the gas pipe penetrates through the first partition plate, and the outer wall of the gas pipe is fixedly connected with the inner wall of the first partition plate, so that the high-temperature waste gas can conveniently transfer heat to the gas pipe.

[0010] Preferably, the transverse plate is fixedly connected with the outer wall of the gas pipe, and the first partition plate and the second partition plate are both fixedly connected with the outer wall of the gas pipe, so that the high-temperature waste gas can conveniently transfer heat to the transverse plate, the first partition plate and the second partition plate.

[0011] Preferably, the filter device comprises a filter chamber, an air suction pipe is arranged on the side, away from the blowdown pipe, of the inner wall of the filter chamber, a connecting block is fixedly connected with the inner wall of the air suction pipe, a rotating shaft is rotatably connected with one side of the connecting block, a rotating rod is fixedly connected in the rotating shaft, and fans are fixedly connected at both ends of the rotating rod; the air suction pipe is fixedly connected with a split barrel at an air outlet end thereof; the rotation of the fans can accelerate the flow speed of the waste gas, so that the speed of the waste gas passing through the filter device is accelerated, and the time consumed for filtering the waste gas is reduced.

[0012] Preferably, the air suction pipe is fixedly connected with the inner wall of the filter chamber, and the bottom end of the rotating rod penetrates through the bottom of the split barrel; the rotating rod is rotatably connected with the split barrel; the fans can split the bubbles into small bubbles, and part of impurities directly sink to the bottom of the filter device, so that the time consumed for depositing the impurities is reduced.

[0013] (Three) beneficial effects

[0014] The utility model provides a waste heat recovery device for coking. The following beneficial effects are achieved:

[0015] (I), the waste heat recovery device for high-temperature waste gas of coking, through the water inlet, cold water is poured into the heat exchange device inside constantly, under the action of the transverse plate, the first partition plate and the second partition plate, water is divided in ladder form, that is, the heating area of cold water is increased, the flow speed of water in the heat exchange device is reduced, the heating time of water in the heat exchange device is increased, the temperature of water can be increased to a certain degree when flowing out of the drain, the waste heat recovery device can continuously add cold water and discharge hot water, the phenomenon that hot water in the container needs to be replaced by cold water before heating is avoided, and the waste of heat in the waste heat recovery process is reduced.

[0016] (ii) The waste heat recovery device for high-temperature coking waste gas, after the waste heat recovery work is completed, drives the fan to rotate when the waste gas passes through the filter device, which increases the flow speed of the waste gas and the speed at which the waste gas passes through the filter device. After the waste gas enters the filtrate, the large bubbles generated are broken into small bubbles by the action of the fan and the dividing tank. Some impurities directly sink to the bottom of the filter device, reducing the time spent on sedimentation of impurities. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0019] Figure 3 This is a cross-sectional view of the heat exchange device of this utility model;

[0020] Figure 4 This is a cross-sectional view of the filtration device of this utility model;

[0021] Figure 5 This utility model Figure 4 Enlarged view of point A in the middle.

[0022] In the diagram: 1. Tank body; 2. Support base; 3. Water inlet; 4. Drain outlet; 5. Heat exchange device; 51. Heat exchange chamber; 52. Gas transmission pipe; 53. Gas supply pipe; 54. Horizontal plate; 55. First partition; 56. Second partition; 57. Insulation layer; 6. Filter device; 61. Filter chamber; 62. Air intake pipe; 63. Connecting block; 64. Rotating shaft; 65. Rotating rod; 66. Fan; 67. Dividing tank; 7. Air outlet; 8. Sewage pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5 This utility model provides a technical solution: a waste heat recovery device for high-temperature exhaust gas from coking, comprising: a tank 1, a support base 2 fixedly connected to the bottom of the tank 1, a water inlet 3 and a drain outlet 4 provided on the surface of the tank 1, and further comprising: an exhaust outlet 7 and a sewage pipe 8, and a heat exchange device 5 and a filter device 6 provided inside the tank 1.

[0025] Please see Figures 1-3The utility model provides a technical scheme: heat exchange device 5 includes heat exchange room 51, the inside of heat exchange room 51 is provided with gas delivery pipe 52 and gas sending pipe 53, the inner wall of heat exchange room 51 is provided with heat preservation layer 57, heat preservation layer 57's inner wall is fixedly connected with cross board 54, the top of cross board 54 is provided with first baffle 55, the bottom of cross board 54 is provided with second baffle 56, gas delivery pipe 52 is fixedly connected with the inner wall of jar body 1, and the one end of gas delivery pipe 52 is through jar body 1 and extends to the inside of jar body 1. The one end of gas delivery pipe 52 is through jar body 1, and the one end of gas delivery pipe 52 extends to jar body 1 inside, and gas sending pipe 53 is through first baffle 55, and the outer wall of gas sending pipe 53 is fixedly connected with the inner wall of first baffle 55, and cross board 54 is fixedly connected with the outer wall of gas delivery pipe 52, and first baffle 55 and second baffle 56 are all fixedly connected with the outer wall of gas delivery pipe 52, input the high temperature waste gas generated in coking into the inside of gas delivery pipe 52, make high temperature waste gas enter the inside of gas sending pipe 53 through gas delivery pipe 52, in the process that high temperature waste gas passes through gas delivery pipe 52 and gas sending pipe 53, high temperature waste gas will transmit heat to the pipe wall of gas delivery pipe 52 and gas sending pipe 53, then by the pipe wall of gas delivery pipe 52 and gas sending pipe 53 transmission to cross board 54, first baffle 55 and second baffle 56, under the action of heat preservation layer 57, the temperature inside heat exchange room 51 gradually increases, then pour cold water into water inlet 3, make cold water enter the inside of heat exchange room 51, and the cold water in heat exchange room 51 is stratified under the action of cross board 54, first baffle 55, second baffle 56 and is accumulated, increase the heated area of cold water, delay the speed of cold water flow, and the water after heating is discharged through drain 4, so that the waste heat recovery device can continuously add cold water and discharge hot water, avoid the phenomenon that hot water in the container needs to be replaced into cold water to heat, reduce the waste of heat in the waste heat recovery process.

[0026] Please refer to Figure 1 、 2The utility model provides a technical scheme: filter device 6 includes filter chamber 61, the inner wall of filter chamber 61 is provided with suction pipe 62 away from the side of blow-off pipe 8, and the inner wall fixedly connected with connecting block 63, the one side of connecting block 63 is rotatably connected with rotating shaft 64, and the inside fixedly connected with rotating rod 65 of rotating shaft 64, and the both ends fixedly connected with fan 66 of rotating rod 65, and the gas outlet end fixedly connected with segmentation bucket 67 of suction pipe 62, and the inner wall fixedly connected with filter chamber 61 of suction pipe 62, and the bottom of segmentation bucket 67 is penetrated by the bottom end of rotating rod 65, and rotating rod 65 is rotatably connected with segmentation bucket 67, and the inside of filter chamber 61 is poured with the filter liquid of proper amount first, and the waste gas of the waste heat recovery of high temperature waste gas enters the filter liquid inside filter chamber 61 through suction pipe 62, and the waste gas enters the filter liquid and produces bubble, and the bubble is segmented into small pieces when passing through segmentation bucket 67, and the contact area of bubble and filter water is increased, and the filtration is more sufficient, and the waste residue in waste gas is deposited inside filter liquid, and the fan 66 of rotating rod 65 top is rotated when waste gas passes through the inside of suction pipe 62, and rotating rod 65 is followed to rotate, and the suction of fan 66 is produced along with the rotation of fan 66 of rotating rod 65 top, and the speed of waste gas passing through suction pipe 62 is increased, and the rotation of rotating rod 65 can drive the rotation of fan 66 of rotating rod 65 bottom, and the rotation of fan 66 of rotating rod 65 bottom cooperates with segmentation bucket 67 and can break bubble, and the waste residue in bubble contacts filter liquid and deposits, and the time spent in waste gas filtration is reduced.

[0027] Working principle:

[0028] When using, the filter water of proper amount is poured inside filter chamber 61 first, and then the high temperature waste gas generated by coking is input into heat exchange device 5, and then the cold water is connected into inlet and outlet 3, and the heat of high temperature waste gas heats the cold water machine, and the water after heating is discharged from drain 4, and the waste heat recovery of high temperature waste gas is completed, and the waste gas after waste heat recovery is filtered inside filter device 6, and the clean gas after filtration is discharged from gas outlet 7.

[0029] When the waste heat is recovered, the high-temperature exhaust gas generated by coking is input into the gas conveying pipe 52, so that the high-temperature exhaust gas enters the gas conveying pipe 53, and in the process of passing through the gas conveying pipe 52 and the gas conveying pipe 53, the high-temperature exhaust gas transmits heat to the pipe wall of the gas conveying pipe 52 and the gas conveying pipe 53, and then the heat is transmitted to the horizontal plate 54, the first partition plate 55 and the second partition plate 56 by the pipe wall of the gas conveying pipe 52 and the gas conveying pipe 53. Under the action of the heat preservation layer 57, the temperature inside the heat exchange chamber 51 gradually increases, and then cold water is poured into the water inlet 3, so that the cold water enters the heat exchange chamber 51. The cold water entering the heat exchange chamber 51 is stratified and stacked under the action of the horizontal plate 54, the first partition plate 55 and the second partition plate 56, which increases the heating area of the cold water and slows down the flow speed of the cold water. At the same time, the high temperature in the heat exchange chamber 51 heats the cold water, so that the temperature of the cold water increases, the waste heat recovery of the high-temperature exhaust gas is completed, and the heated water is discharged through the water outlet 4. The device can continuously add cold water and discharge hot water, reducing the waste of heat caused by heating the cold water during waste heat recovery.

[0030] When the exhaust gas after completing the waste heat recovery work is filtered, an appropriate amount of filtrate is poured into the inside of the filter chamber 61, so that the exhaust gas after completing the waste heat recovery work enters the filtrate in the filter chamber 61 through the gas suction pipe 62. The bubbles generated by the exhaust gas entering the filtrate are divided into small pieces when passing through the segmentation barrel 67, increasing the contact area of the bubbles and the filtering water, so that the exhaust gas is more fully filtered. The waste residue in the exhaust gas is precipitated in the filtrate, and at the same time, the exhaust gas passing through the gas suction pipe 62 drives the fan 66 at the top end of the rotating rod 65 to rotate, so that the rotating rod 65 rotates with the fan 66 at the top end of the rotating rod 65. With the rotation of the fan 66, the suction force of the fan 66 is increased, which increases the speed of the exhaust gas passing through the gas suction pipe 62. At the same time, the rotation of the rotating rod 65 drives the rotation of the fan 66 at the bottom end of the rotating rod 65. The rotation of the fan 66 at the bottom end of the rotating rod 65 cooperates with the segmentation barrel 67 to break the bubbles, so that the waste residue in the bubbles contacts the filtrate, and the waste residue is directly precipitated at the bottom of the filter chamber 61, improving the filtering speed of the exhaust gas. The filtered gas is discharged from the gas outlet 7, and when the impurities in the filtrate are too much, it can be discharged through the sewage pipe 8.

[0031] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it is intended to be limited only by the words recited in the appended claims. The scope of the present application shall be limited only by the claims.

[0032] While the embodiments of the present application have been shown and described with respect to particular embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application. Therefore, the scope of the application should not be limited by the embodiments, but should be defined only in accordance with the following claims and their equivalents.

Claims

1. A waste heat recovery device for coking, comprising: The tank (1) has a support base (2) fixedly connected to its bottom, and the surface of the tank (1) is provided with a water inlet (3) and a drain outlet (4). The tank (1) is characterized by further including an air outlet (7) and a sewage pipe (8). The tank (1) is provided with a heat exchange device (5) and a filter device (6). The heat exchange device (5) includes a heat exchange chamber (51), and an air supply pipe (52) and an air delivery pipe (53) are provided inside the heat exchange chamber (51). An insulation layer (57) is provided on the inner wall of the heat exchange chamber (51). A horizontal plate (54) is fixedly connected to the inner wall of the insulation layer (57). A first partition (55) is provided on the top of the horizontal plate (54), and a second partition (56) is provided on the bottom of the horizontal plate (54).

2. The waste heat recovery device for coking as described in claim 1, characterized in that: The gas supply pipe (52) is fixedly connected to the inner wall of the tank (1), and one end of the gas supply pipe (52) penetrates the tank (1) and extends into the interior of the tank (1). The gas delivery pipe (53) penetrates the first partition (55), and the outer wall of the gas delivery pipe (53) is fixedly connected to the inner wall of the first partition (55).

3. The waste heat recovery device for coking as described in claim 1, characterized in that: The horizontal plate (54) is fixedly connected to the outer wall of the gas pipeline (52), and the first partition (55) and the second partition (56) are both fixedly connected to the outer wall of the gas pipeline (52).

4. The waste heat recovery device for coking as described in claim 1, characterized in that: The filtration device (6) includes a filtration chamber (61). An air intake pipe (62) is provided on the inner wall of the filtration chamber (61) away from the drain pipe (8). A connecting block (63) is fixedly connected to the inner wall of the air intake pipe (62). A rotating shaft (64) is rotatably connected to one side of the connecting block (63). A rotating rod (65) is fixedly connected inside the rotating shaft (64). A fan (66) is fixedly connected to both ends of the rotating rod (65). A dividing bucket (67) is fixedly connected to the air outlet end of the air intake pipe (62).

5. A waste heat recovery device for coking as described in claim 4, characterized in that: The air intake pipe (62) is fixedly connected to the inner wall of the filter chamber (61), and the bottom end of the rotating rod (65) penetrates the bottom of the dividing barrel (67). The rotating rod (65) is rotatably connected to the dividing barrel (67).

Images