Waste heat utilization device for high-temperature tail gas of electric furnace for zinc production plant

Abstract

The utility model discloses a waste heat utilization device for high-temperature tail gas of an electric furnace in a zinc production plant, which comprises a cyclone dust collector, a bag-type dust collector, waste heat recovery devices and a water bath dust collector, and the waste heat recovery devices are respectively arranged between the bag-type dust collector and the water bath dust collector and behind the water bath dust collector; the waste heat recovery device further comprises condensation recovery devices and a hot air dehumidification device, the condensation recovery devices are arranged on the left side and the right side of the water bath dust remover respectively, and the hot air dehumidification device is arranged below the condensation recovery devices. The device has the functions that hot air circulation is utilized, water-containing dust recycling materials are purged with hot air, waste heat in tail gas is utilized, and meanwhile product treatment procedures are reduced; the condenser is arranged to recover waste heat in tail gas and waste heat in water vapor, the water vapor releases heat and is condensed into condensate water, and the burden of the condensate water in a subsequent pipeline is reduced while the waste heat recovery efficiency is improved; the condenser is added at the front end of the water-bath dust removal process to improve the heat efficiency of the device.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the electric furnace zinc smelting technical field especially relates to a zinc plant electric furnace high temperature tail gas's waste heat utilization device. BACKGROUND

[0002] In the electric furnace zinc smelting process, the high-temperature tail gas generated by zinc smelting contains a lot of dust and waste heat, and recycling these dust and waste heat can improve the resource utilization rate of smelting.

[0003] In the prior art, such as a kind of electric furnace with tail gas utilization disclosed in Chinese patent (CN206959612U), including electric furnace body, the electric furnace body is connected with electric furnace preheating box, the air outlet of electric furnace body is connected with cyclone dust collector, the bottom of cyclone dust collector is connected with dust collecting device, waste heat recycling device is arranged between cyclone dust collector and electric furnace preheating box, the air outlet pipe a of the top of cyclone dust collector is connected with water bath impact dust collector, the water bath impact dust collector is connected with cloth bag dust collector by air outlet pipe b.The air outlet of the electric furnace body is connected with cyclone dust removal device for removing large particle dust, the air outlet of cyclone dust removal device is connected with water bath impact dust collector for removing larger particle dust, and finally through cloth bag dust collector to remove fine particles in flue gas, under the premise of guaranteeing dust removal effect in three ways, the waste heat recycling device can effectively utilize the waste heat in flue gas to heat the material in electric furnace preheating box, and improve the utilization rate of heat energy.

[0004] This mode has the following defects: 1. When high-temperature tail gas enters the cyclone dust collector, it contacts the wall surface of the cyclone dust collector with low temperature, which produces condensed water. The condensed water mixed with the dust in the cyclone dust collector forms a wet mixture after being recycled, which needs to be dehydrated before being used as dust, increasing the process and resulting in an increase in production and recycling cost; 2. After the tail gas passes through the water bath dust collector, water vapor is carried into the subsequent pipeline, and a large amount of condensed water is produced after the water vapor releases heat. These condensed water not only takes away part of the heat in the tail gas, but also increases the burden of the condensed water pipeline, reduces the waste heat recovery efficiency, and reduces the service life of the condensed water pipeline; 3. The heat in the high-temperature tail gas is absorbed by water after entering the water bath dust collector, and is not recycled, resulting in a decrease in the thermal efficiency of the device.

[0005] Therefore, the present application provides a waste heat utilization device for high-temperature tail gas of an electric furnace in a zinc plant. UTILITY MODEL CONTENTS

[0006] To solve the above technical problems, the utility model discloses a kind of zinc plant electric furnace high-temperature tail gas's waste heat utilization device, and the device utilizes hot air circulation, and the water-containing dust recovery is swept using hot air, and the heat in hot air is used to make the water vapor in mixture condense, utilize the waste heat in tail gas while reducing the treatment procedure of product;Condenser is arranged in the rear of water bath dust removal step to recover the waste heat in tail gas and the waste heat in water vapor, and make water vapor heat release and condense into condensed water, increase waste heat recovery efficiency while reducing the burden of condensed water in subsequent pipeline;Condenser is increased in the front end of water bath dust removal process, first recover the waste heat in tail gas, reduce the heat loss in water bath dust removal process, improve the thermal efficiency of device.

[0007] To achieve the above technical effects, the utility model provides a kind of zinc plant electric furnace high-temperature tail gas's waste heat utilization device, including cyclone dust collector, cloth bag dust collector, waste heat recovery device, water bath dust remover, waste heat recovery device is respectively arranged between cloth bag dust collector and water bath dust remover, in the rear of water bath dust remover;The waste heat recovery device further includes condensing recovery device, hot air dehumidification device, condensing recovery device is respectively arranged in the left side and right side of water bath dust remover, and hot air dehumidification device is arranged below condensing recovery device.

[0008] As preferred, the condensing recovery device further includes a first condenser, a second condenser and a heat preservation water tank, the first condenser is arranged at the right side of the water bath dust remover, and the right side of the first condenser is connected with the air outlet pipe above the water bath dust remover, the second condenser is arranged on the pipe between the outlet of the cloth bag dust collector and the inlet of the water bath dust remover, the heat preservation water tank is arranged below the second condenser, the water inlet above the first condenser is connected with the raw water pipe through a pipe, the water outlet below the first condenser is connected with the water inlet above the second condenser through a pipe, and the outlet below the second condenser is connected with the water inlet above the heat preservation water tank through a pipe.

[0009] As preferred, the right side of the second condenser is provided with a bypass air pipe.

[0010] As preferred, the right side of the bypass air pipe is provided with a check valve.

[0011] As preferred, the hot air dehumidifying device further comprises an air suction fan, an air inlet, a box, a conveying belt device a, a conveying belt device b and a filter, the air suction fan is arranged below the bypass air pipe and the air inlet above the air suction fan is connected with the bypass air pipe, the air inlet is arranged on the left side of the air suction fan, the box is arranged on the left side of the air inlet, the conveying belt device a is arranged on the left side inside the box and the air inlets above the conveying belt device a are respectively connected with the outlets below the cyclone dust collector and the bag-type dust collector through pipelines, the conveying belt device b is arranged on the right side below the conveying belt device a inside the box, and the filter is arranged on the left side above the box and connected with the outlet of the secondary condenser through a pipeline.

[0012] As preferred, the air inlet is internally provided with an air plate.

[0013] As preferred, the filter further comprises a shell, a filter plate, a limiting block, a spring, a handle and an ash storage box, the filter plate is arranged in the middle of the inner side of the shell and connected with the shell through a sliding slot, the limiting block is arranged on the back side of the filter plate, the spring is arranged between the limiting block and the sliding slot of the shell, the handle is arranged on the front side of the filter plate, and the ash storage box capable of opening the door plate is arranged below the filter plate.

[0014] Compared with the prior art, the device has the following beneficial effects:

[0015] The device comprises a cyclone dust collector, a bag-type dust collector, a waste heat recovery device and a water bath dust collector, the hot air dehumidifying device in the waste heat recovery device uses hot air circulation, the hot air after dust removal by the secondary condenser is used for blowing and sweeping the water-containing dust recovery, the water vapor in the mixture is condensed by using the heat in the hot air, the waste heat in the tail gas is used to reduce the treatment process of the product; the secondary condenser is arranged behind the water bath dust removal step to recover the waste heat in the tail gas and the waste heat in the water vapor, and the water vapor is condensed into condensed water by releasing heat, so that the waste heat recovery efficiency is increased and the burden of the condensed water in the subsequent pipeline is reduced; the secondary condenser is arranged at the front end of the water bath dust collector, the waste heat in the tail gas is recovered first, the heat loss in the water bath dust removal process is reduced, and the heat efficiency of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a front view of the device;

[0017] Figure 2 is a left view of the device;

[0018] Figure 3 is a sectional view of a section a; Figure 2

[0019] Figure 4 is a partial view of b; Figure 3 ​​

[0020] Figure 5 is an isometric view of the utility model;

[0021] Figure 6 is a schematic view of the internal structure of the filter in the utility model;

[0022] In the drawings, the components represented by each reference numeral are listed as follows:

[0023] 1, cyclone dust collector; 2, bag-type dust collector; 3, water bath dust collector; 4, primary condenser; 5, secondary condenser; 6, heat preservation water tank; 7, bypass air pipe; 8, check valve; 9, induced draft fan; 10, air inlet hopper; 11, box body; 12, conveying belt device a; 13, conveying belt device b; 14, filter; 15, air plate; 16, shell; 17, filter plate; 18, limiting block; 19, spring; 20, handle; 21, ash storage box; 22, raw water pipeline. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] As Figures 1 to 6 shown in the prior art in the present embodiment, the inventor found that the prior art has the following defects: firstly, when the high-temperature tail gas contacts the wall surface with a relatively low temperature in the cyclone dust collector, condensate water is generated, and the condensate water mixed with the dust in the cyclone dust collector forms a wet mixture after being recovered, which needs to be treated by dehydration before being used as dust, thereby increasing the process and leading to an increase in the production and recovery cost; secondly, after the tail gas passes through the water bath dust collector, water vapor is carried into the subsequent pipeline, and a large amount of condensate water is generated after the water vapor releases heat, which not only takes away part of the heat in the tail gas but also increases the burden of the condensate water pipeline, thereby reducing the waste heat recovery efficiency and the service life of the condensate water pipeline; thirdly, the heat in the high-temperature tail gas is not recovered and utilized after being absorbed by the water in the water bath dust collector, thereby reducing the thermal efficiency of the device;

[0026] Therefore, the inventor provides a waste heat utilization device for high-temperature tail gas of an electric furnace in a zinc production plant, which comprises a cyclone dust collector 1, a bag-type dust collector 2, a waste heat recovery device and a water bath dust collector 3, the waste heat recovery device is arranged between the bag-type dust collector 2 and the water bath dust collector 3 and at the back of the water bath dust collector 3; the waste heat recovery device further comprises a condensation recovery device and a hot air dehumidification device, the condensation recovery device is arranged at the left side and the right side of the water bath dust collector 3, and the hot air dehumidification device is arranged below the condensation recovery device.

[0027] With the above scheme, when the tail gas in the electric furnace passes through the cyclone dust collector 1 and the bag dust collector 2 in turn for dust removal, the tail gas with most of the dust particles removed enters the secondary condenser 5 to recover part of the waste heat. A condenser is added at the front end of the water bath dust removal process to recover the waste heat in the tail gas first, reducing the heat loss in the water bath dust removal process and improving the thermal efficiency of the device. Then part of the tail gas enters the water bath dust removal device 3 to remove the remaining dust, and carries water vapor into the primary condenser 4. In the primary condenser 4, the remaining waste heat in the tail gas and the waste heat in the water vapor are recovered, and after condensation and removal of water vapor, it is discharged to the next process for desulfurization treatment. A condenser is arranged behind the water bath dust removal step to recover the waste heat in the tail gas and the waste heat in the water vapor, and to make the water vapor condense into condensed water by releasing heat, thereby increasing the waste heat recovery efficiency and reducing the burden of condensed water in the subsequent pipeline. Another part is extracted from the bypass pipe at the outlet of the primary condenser 4 by the induced draft fan 9 and transported into the box 11 of the hot air dehumidification device. The conveying belt device a12 in the box 11 receives the water-containing dust mixture falling from the cyclone dust collector 1 and the bag dust collector 2 above, which is blown and dried by the tail gas from right to left along the conveying belt device a12. After passing through the filter 14 to filter out the carried dust, it is recovered in front of the water bath dust removal device 3 through the pipeline, and is discharged after being treated by the water bath dust removal device 3 and the secondary condenser 5. The hot air circulation is used to blow the water-containing dust recovery product with hot air, the water vapor in the mixture is condensed by using the heat in the hot air, the waste heat in the tail gas is used, and the treatment process of the product is reduced.

[0028] Further, the condensation recovery device further comprises a primary condenser 4, a secondary condenser 5, and a heat preservation water tank 6. The primary condenser 4 is arranged on the right side of the water bath dust removal device 3, and the air inlet on the right side of the primary condenser 4 is connected with the air outlet pipeline above the water bath dust removal device 3. The secondary condenser 5 is arranged on the pipeline between the outlet of the bag dust collector 2 and the inlet of the water bath dust removal device 3. The heat preservation water tank 6 is arranged below the secondary condenser 5. The water inlet on the top of the primary condenser 4 is connected with the raw water pipeline 22 through a pipeline, and the water outlet below the primary condenser 4 is connected with the water inlet above the secondary condenser 5 through a pipeline. The outlet below the secondary condenser 5 is connected with the water inlet above the heat preservation water tank 6 through a pipeline. The front side of the heat preservation water tank 6 is provided with a water outlet pipeline connected to a water-using device.

[0029] Wherein, the raw water enters the first condenser 4 through the raw water pipeline to absorb the remaining heat of the tail gas and the heat of the water vapor, preheats the cooling water, and condenses the water vapor in the tail gas into condensed water, then the cooling water enters the second condenser 5 to absorb most of the heat of the tail gas, heats the cooling water into hot water, and then discharges into the heat preservation water tank 6 below to supply the water equipment, and the condenser is arranged behind the water bath dust removal step to recover the heat of the tail gas and the heat of the water vapor, and to condense the water vapor into condensed water, which increases the heat recovery efficiency and reduces the burden of the condensed water in the subsequent pipeline; the condenser is added at the front end of the water bath dust removal process to recover the heat in the tail gas first, reduce the heat loss in the water bath dust removal process, and improve the thermal efficiency of the device.

[0030] Further, the bypass air pipe 7 is arranged on the right side of the second condenser 5.

[0031] Wherein, the bypass air pipe 7 sends the tail gas after dust removal by the second condenser 5 to the hot air dehumidification device through the induced draft fan 9.

[0032] Further, the check valve 8 is arranged on the right side of the bypass air pipe 7.

[0033] Wherein, the check valve 8 can prevent the backflow of the tail gas from the filter 14 and the water vapor in the water bath dust remover 3.

[0034] Further, the hot air dehumidification device further comprises an induced draft fan 9, an air inlet 10, a box body 11, a conveying belt device a 12, a conveying belt device b 13, and a filter 14, the induced draft fan 9 is arranged below the bypass air pipe 7 and the inlet above the induced draft fan 9 is connected with the bypass air pipe 7, the air inlet 10 is arranged on the left side of the induced draft fan 9, the box body 11 is arranged on the left side of the air inlet 10, the conveying belt device a 12 is arranged on the left side inside the box body 11, the inlets above the conveying belt device a 12 are respectively connected with the outlets below the cyclone dust collector 1 and the bag filter 2 through pipelines, the conveying belt device b 13 is arranged inside the box body 11 and below the conveying belt device a 12 on the right side, the filter 14 is arranged on the left side above the box body 11, and the outlet of the filter 14 is connected with the outlet pipe of the second condenser 5 through a pipeline.

[0035] The induced draft fan 9 draws the exhaust gas from the bypass air pipe 7 to the rear of the secondary condenser 5, and the exhaust gas is delivered to the inside of the box 11 through the air inlet 10, and the water-containing dust mixture transported to the right by the conveyor belt device a 12 is blown, and the dried dust is transported to the right after being delivered to the conveyor belt device b 13, and the exhaust gas after blowing out the water vapor is filtered through the filter 14 to remove a small amount of dust carried, and then returned to the pipeline in front of the water bath dust collector 3 inlet through the filter 14 outlet pipeline, and after the water bath dust removal, the remaining heat is recovered by the primary condenser 4, and the water vapor is condensed and normally discharged, and the hot air circulation is used to blow the water-containing dust recovery product with hot air, and the heat in the hot air is used to make the water vapor in the mixture condense, and the waste heat in the exhaust gas is used to reduce the processing procedure of the product.

[0036] Further, the air inlet 10 is provided with a wind plate 15 inside;

[0037] The wind plate 15 can uniformly discharge the exhaust gas introduced by the induced draft fan 9 from the air inlet 10, and uniformly blow the water-containing dust mixture on the conveyor belt device a 12.

[0038] Further, the filter 14 further comprises a shell 16, a filter plate 17, a limiting block 18, a spring 19, a handle 20, and a dust storage box 21, the filter plate 17 is arranged in the middle of the inner side of the shell 16 and is connected with the shell 16 through a sliding groove, the limiting block 18 is arranged at the rear side of the filter plate 17, the spring 19 is arranged between the limiting block 18 and the sliding groove of the shell 16, the handle 20 is arranged at the front side of the filter plate 17, and the dust storage box 21 which can open the door plate is arranged below the filter plate 17;

[0039] The small amount of dust carried in the exhaust gas blowing the water-containing dust mixture is filtered through the filter plate 17 and discharged, and after a period of time of accumulating dust, the filter plate 17 can be moved by pulling the handle 20, so that the limiting block 18 compresses the spring 19, and the filter plate 17 is moved, and after the handle 20 is released, the filter plate 17 is bounced back by the spring 19, and in this way, the filter plate 17 is repeatedly vibrated to shake the dust accumulated on the filter plate 17 into the dust storage box 21, and the door plate in front of the dust storage box 21 can be opened for cleaning.

[0040] In summary, the device comprises a cyclone dust collector 1, a bag dust collector 2, a waste heat recovery device, a water bath dust collector 3, the hot air dehumidification device in the waste heat recovery device uses hot air circulation, the water-containing dust recovery is recovered by the waste heat dehumidification of the secondary condenser 5, the water vapor in the mixture is condensed by using the heat in the hot air, the waste heat in the tail gas is recovered at the same time, and the water vapor is condensed into condensed water by releasing heat, the waste heat recovery efficiency is increased, and the burden of the condensed water in the subsequent pipeline is reduced; the secondary condenser 5 is arranged behind the water bath dust removal step to recover the waste heat in the tail gas and the waste heat in the water vapor, and the water vapor is condensed into condensed water by releasing heat, the waste heat recovery efficiency is increased, and the burden of the condensed water in the subsequent pipeline is reduced; the secondary condenser 5 is arranged in front of the water bath dust collector 3, the waste heat in the tail gas is recovered first, the heat loss in the water bath dust removal process is reduced, and the thermal efficiency of the device is improved.

[0041] The working principle of the utility model is as follows:

[0042] When the tail gas in the electric furnace is removed by the cyclone dust collector 1 and the bag dust collector 2, the tail gas with most of the dust particles is removed and enters the secondary condenser 5 to recover part of the waste heat, the condenser is arranged in front of the water bath dust removal process, the waste heat in the tail gas is recovered first, the heat loss in the water bath dust removal process is reduced, and the thermal efficiency of the device is improved; then part of the tail gas enters the water bath dust collector 3 to remove the remaining dust, and carries water vapor into the primary condenser 4, the remaining waste heat in the tail gas and the waste heat in the water vapor are recovered in the primary condenser 4, and the water vapor is removed after condensation, and then discharged to the next process for desulfurization treatment;

[0043] In this process, the raw water enters the primary condenser 4 first to absorb the remaining waste heat in the tail gas and the waste heat carried by the water vapor, preheats the cold water, and condenses the water vapor in the tail gas into condensed water; then the cooling water with a higher temperature enters the secondary condenser 5 to absorb most of the waste heat in the tail gas, heats the cooling water into hot water, and then discharges to the heat preservation water tank 6 below to supply water equipment; the condenser is arranged behind the water bath dust removal step to recover the waste heat in the tail gas and the waste heat in the water vapor, and the water vapor is condensed into condensed water by releasing heat, the waste heat recovery efficiency is increased, and the burden of the condensed water in the subsequent pipeline is reduced;

[0044] After the secondary condenser 5, the bypass air pipe 7 sends the tail gas after dust removal of the secondary condenser 5 to the hot air dehumidification device through the induced draft fan 9, the induced draft fan 9 sends the tail gas to the inside of the box 11 through the air inlet 10 after being led out from the rear of the secondary condenser 5 through the bypass air pipe 7, the air baffle 15 can uniformly discharge the tail gas led in by the induced draft fan 9 from the air inlet 10, uniformly sweep the water-containing dust mixture on the conveying belt device a 12, the dried dust is conveyed to the right after being conveyed to the conveying belt device b 13, the tail gas after blowing out the water vapor is filtered through the filter 14 after carrying a small amount of dust, and then returns to the pipeline in front of the water bath dust remover 3 inlet through the filter 14 outlet pipeline, after the water bath dust removal, the first condenser 4 recovers the remaining waste heat, and the condensed water vapor is normally discharged, the hot air circulation is used, the water-containing dust recovery is swept by the hot air, the water vapor in the mixture is condensed by using the heat in the hot air, the waste heat in the tail gas is used at the same time, and the treatment process of the product is reduced;

[0045] A small amount of dust carried in the tail gas after sweeping the water-containing dust mixture is filtered through the filter plate 17 and then discharged, the filter plate 17 can be moved by pulling the handle 20 after accumulating dust for a period of time, so that the limiting block 18 compresses the spring 19, and the filter plate 17 is moved, after the handle 20 is released, the filter plate 17 is bounced back by the spring 19, in this way, the filter plate 17 is repeatedly vibrated to shake the accumulated dust on the filter plate 17 into the ash storage box 21, and the door plate in front of the ash storage box 21 can be opened for cleaning;

[0046] Up to now, the working principle of the device is described.

[0047] It should be noted that, in this text, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment.

[0048] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A waste heat utilization device for high-temperature tail gas of an electric furnace of a zinc production plant, comprising a cyclone dust collector (1), a bag filter (2), a waste heat recovery device, and a water bath dust collector (3), wherein the waste heat recovery device is arranged between the bag filter (2) and the water bath dust collector (3) and at the rear of the water bath dust collector (3). The waste heat recovery device further comprises a condensation recovery device and a hot air dehumidification device, and the condensation recovery device is arranged on the left and right sides of the water bath dust collector (3) respectively.

2. A device for utilizing the waste heat of high-temperature off-gas of an electric furnace for zinc production according to claim 1, characterized in that: The condensation recovery device further comprises a first condenser (4), a second condenser (5) and a heat preservation water tank (6), the first condenser (4) is arranged on the right side of the water bath dust collector (3), the air inlet on the right side of the first condenser (4) is connected with the air outlet pipeline above the water bath dust collector (3), the second condenser (5) is arranged on the pipeline between the outlet of the bag-type dust collector (2) and the inlet of the water bath dust collector (3), the heat preservation water tank (6) is arranged below the second condenser (5), the water inlet on the top of the first condenser (4) is connected with the raw water pipeline (22) through a pipeline, the water outlet on the bottom of the first condenser (4) is connected with the water inlet on the top of the second condenser (5) through a pipeline, the outlet on the bottom of the second condenser (5) is connected with the water inlet on the top of the heat preservation water tank (6) through a pipeline, and the front side of the heat preservation water tank (6) is provided with a water outlet pipeline connected with a water using device.

3. A device for utilizing the waste heat of the high-temperature exhaust gas of an electric furnace for zinc production according to claim 2, characterized in that: The right side of the second condenser (5) is provided with a bypass air pipe (7).

4. The device for utilizing the waste heat of the high-temperature tail gas of an electric furnace for zinc production according to claim 3, characterized in that: The right side of the bypass air pipe (7) is provided with a check valve (8).

5. A device for utilizing the waste heat of the high-temperature exhaust gas of an electric furnace of a zinc plant according to claim 1, characterized in that: The hot air dehumidification device further comprises an air induction fan (9), an air inlet hopper (10), a box body (11), a conveying belt device a (12), a conveying belt device b (13) and a filter (14), the air induction fan (9) is arranged below the bypass air pipe (7), the air inlet on the top of the air induction fan (9) is connected with the bypass air pipe (7), the air inlet hopper (10) is arranged on the left side of the air induction fan (9), the box body (11) is arranged on the left side of the air inlet hopper (10), the conveying belt device a (12) is arranged on the left side inside the box body (11), the air inlets on the top of the conveying belt device a (12) are connected with the outlets below the cyclone dust collector (1) and the bag-type dust collector (2) through pipelines respectively, the conveying belt device b (13) is arranged inside the box body (11) and located on the right side below the conveying belt device a (12), the filter (14) is arranged on the top left side of the box body (11), and the outlet of the filter (14) is connected with the pipeline between the air outlet on the right side of the second condenser (5) through a pipeline.

6. A device for utilizing the waste heat of the high-temperature exhaust gas of an electric furnace of a zinc plant according to claim 5, characterized in that: The air inlet hopper (10) is provided with a wind plate (15) inside.

7. A device for utilizing the waste heat of the high-temperature exhaust gas of an electric furnace of a zinc plant according to claim 5, characterized in that: The filter (14) further comprises an outer shell (16), a filter plate (17), a limiting block (18), a spring (19), a handle (20) and an ash storage box (21), the filter plate (17) is arranged in the middle of the inner side of the outer shell (16) and is connected with the outer shell (16) through a sliding slot, the limiting block (18) is arranged on the back side of the filter plate (17), the spring (19) is arranged between the limiting block (18) and the sliding slot of the outer shell (16), the handle (20) is arranged on the front side of the filter plate (17), and the ash storage box (21) which can open a door plate is arranged below the filter plate (17).

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