Tail gas treatment device of gas hot blast stove

Abstract

The utility model relates to the technical field of hot blast stove tail gas treatment, and discloses a gas hot blast stove tail gas treatment device which comprises a dust removal box, a cooling box and a purification box, the dust removal box is connected with the cooling box through a first pipeline, the cooling box is connected with the purification box through a second pipeline, and a gas inlet pipe is arranged on the dust removal box. An exhaust pipe is arranged on the purification box; a filter screen is arranged in the dust removal box and used for filtering smoke dust in tail gas, a cleaning component is arranged in the dust removal box and used for cleaning impurities on the filter screen and the inner wall of the dust removal box, a cooling cavity is formed in the cooling box, a bent pipe is arranged between the first pipeline and the second pipeline, and the bent pipe is located in the cooling cavity; flue gas impurities in the tail gas are filtered and removed before the high-temperature tail gas is cooled, so that the situation that the high-temperature flue gas is adhered to the inner wall of the bent pipe when passing through the bent pipe, the bent pipe is easily blocked, and the cooling effect of cooling water on the high-temperature flue gas is influenced can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hot blast furnace tail gas treatment, in particular to a tail gas treatment device for a gas hot blast furnace. Background Art

[0002] Gas hot air furnace is an equipment used in metallurgy, machinery, building materials, chemical industry and other industries. It is widely used in grain drying operations. The fuel is mainly coal. Gas hot air furnace will produce a lot of exhaust gas during the combustion process, which needs to be treated before it can be discharged.

[0003] In the prior art, there is a tail gas emission treatment device for a hot blast furnace (CN220206398U), the tail gas pipe of the hot blast furnace is connected with the intake pipe, and the serpentine pipe is immersed in the cold water of the No. 1 treatment chamber. The tail gas can be introduced into the serpentine pipe through the intake pipe, which is convenient for better reducing the temperature of the tail gas itself. At the same time, the tail gas with reduced temperature is introduced into the No. 2 treatment chamber through the connecting pipe. Through a number of activated carbon plates arranged in an upper and lower staggered manner, part of the irritating odor contained in the tail gas is absorbed, so that the treated tail gas finally discharged through the outlet pipe has a lower temperature, and damage to the internal components of the tail gas treatment device is avoided as much as possible. At the same time, the harmful odor in the tail gas is removed, so as to achieve a more detailed treatment of the tail gas and improve the tail gas treatment effect. However, the tail gas of the hot blast furnace contains a large amount of smoke dust. When the tail gas containing smoke dust passes through the serpentine pipe, the smoke dust is easy to adhere to the inner wall of the serpentine pipe, which will not only cause the clogging of the serpentine pipe but also affect the cooling effect of the cold water on the tail gas, so it needs to be improved.

[0004] Therefore, those skilled in the art have proposed a tail gas treatment device for a gas hot blast furnace to solve the problems raised in the above background. Utility Model Content

[0005] The purpose of the utility model is to provide a tail gas treatment device for a gas hot blast furnace to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A tail gas treatment device for a gas hot blast furnace comprises a dust removal box, a cooling box and a purification box, wherein the dust removal box is connected to the cooling box via a first pipe, and the cooling box is connected to the purification box via a second pipe, an air intake pipe is arranged on the dust removal box, and an exhaust pipe is arranged on the purification box; a filter is arranged in the dust removal box for filtering smoke in the tail gas, a cleaning component is arranged in the dust removal box for cleaning impurities on the filter and the inner wall of the dust removal box, a cooling cavity is opened in the cooling box, a bent pipe is arranged between the first pipe and the second pipe, and the bent pipe is located in the cooling cavity.

[0008] As a further solution of the utility model: the cleaning component includes a motor installed on the top of the dust removal box, the driving end of the motor is equipped with a rotating shaft located inside the dust removal box, connecting rods are installed on both sides of the rotating shaft, the connecting rods are fixedly connected to the scraper, and the scraper is in contact with the inner wall of the dust removal box and the filter.

[0009] As a further solution of the utility model: a water tank is provided in the cooling box, a circulation pipe is provided between the water tank and the cooling chamber, a water pump is provided in the water tank, and the water pump is fixedly connected to a return pipe penetrating into the cooling chamber.

[0010] As a further solution of the utility model: a cooling unit connected to the circulation pipe is arranged in the water tank.

[0011] As a further solution of the utility model: gas collecting chambers are opened on both sides of the purification box, and serpentine activated carbon plates are arranged equally spaced between the two gas collecting chambers, one of the gas collecting chambers is connected to the second pipeline, and the other gas collecting chamber is connected to the exhaust pipe.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides an exhaust gas treatment device for a gas hot blast furnace, which filters the smoke and dust impurities in the exhaust gas discharged from the gas hot blast furnace through a filter, and the impurities on the filter and the inner wall of the dust removal box can be cleaned by a cleaning component, the filtered exhaust gas passes through a curved pipe, and the high-temperature exhaust gas in the curved pipe is cooled by cooling water, and the cooled exhaust gas is purified by a purification box and then discharged, and the device filters and removes the smoke impurities in the exhaust gas before cooling the high-temperature exhaust gas, thereby preventing the high-temperature exhaust gas from adhering to the inner wall of the curved pipe when passing through the curved pipe, which may easily cause blockage of the curved pipe and affect the cooling effect of the cooling water on the high-temperature flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention is a schematic structural diagram of a tail gas treatment device for a gas hot blast furnace.

[0014] Figure 2 The present invention is a schematic diagram of the internal structure of a tail gas treatment device of a gas hot blast furnace.

[0015] Figure 3 The present invention is a schematic diagram of the structure inside a cooling box in a tail gas treatment device of a gas hot blast furnace.

[0016] In the figure: 1. dust removal box; 2. air intake pipe; 3. first pipeline; 4. cooling box; 5. second pipeline; 6. purification box; 7. exhaust pipe; 8. filter; 9. motor; 10. rotating shaft; 11. connecting rod; 12. scraper; 13. air collecting chamber; 14. serpentine activated carbon plate; 15. cooling chamber; 16. bent pipe; 17. cold water tank; 18. circulation pipe; 19. cooling unit; 20. water pump; 21. return pipe. DETAILED DESCRIPTION

[0017] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0018] See also Figure 1-Figure 3 A tail gas treatment device for a gas hot blast furnace comprises a dust removal box 1, a cooling box 4 and a purification box 6, wherein the dust removal box 1 is connected to the cooling box 4 through a first pipe 3, and the cooling box 4 is connected to the purification box 6 through a second pipe 5, an air intake pipe 2 is arranged on the dust removal box 1, and an exhaust pipe 7 is arranged on the purification box 6; a filter screen 8 is arranged in the dust removal box 1 for filtering smoke in the tail gas, a cleaning component is arranged in the dust removal box 1 for cleaning impurities on the filter screen 8 and the inner wall of the dust removal box 1, a cooling chamber 15 is opened in the cooling box 4, a bent pipe 16 is arranged between the first pipe 3 and the second pipe 5, and the bent pipe 16 is located in the cooling chamber 15.

[0019] The smoke and dust impurities in the exhaust gas discharged from the gas hot blast furnace are filtered through the filter 8, and the impurities on the filter 8 and the inner wall of the dust removal box 1 can be cleaned by the cleaning component. The filtered exhaust gas passes through the curved pipe 16, and the high-temperature exhaust gas in the curved pipe 16 is cooled by cooling water. The cooled exhaust gas is purified by the purification box 6 and then discharged. The device filters and removes the smoke impurities in the exhaust gas before cooling the high-temperature exhaust gas, thereby preventing the high-temperature exhaust gas from adhering to the inner wall of the curved pipe 16 when passing through the curved pipe 16, which may easily cause blockage of the curved pipe 16 and affect the cooling effect of the cooling water on the high-temperature exhaust gas.

[0020] The cleaning component includes a motor 9 installed at the top of the dust removal box 1, and the driving end of the motor 9 is installed with a rotating shaft 10 located inside the dust removal box 1, and connecting rods 11 are installed on both sides of the rotating shaft 10. The connecting rods 11 are fixedly connected to scrapers 12, and the scrapers 12 are in contact with the inner wall of the dust removal box 1 and the filter 8. When the filter 8 filters the smoke and dust impurities in the exhaust gas, the motor 9 is started, and the motor 9 drives the rotating shaft 10 to rotate, driving the connecting rod 11 to rotate, and the smoke and dust impurities on the surface of the filter 8 are cleaned by the scraper 12, and the smoke and dust impurities on the inner wall of the dust removal box 1 are also cleaned.

[0021] A water tank is provided in the cooling box 4, a circulation pipe 18 is provided between the water tank and the cooling chamber 15, a water pump 20 is provided in the water tank, the water pump 20 is fixedly connected to a return pipe 21 penetrating into the cooling chamber 15, a cooling unit 19 connected to the circulation pipe 18 is provided in the water tank, during use, the cooling water in the cooling chamber 15 enters the cooling unit 19 through the circulation pipe 18, the reflux cooling water is re-cooled by the cooling unit 19, and then the cooled cooling water re-enters the cooling chamber 15 through the water pump 20 and the return pipe 21.

[0022] Gas collecting chambers 13 are provided on both sides of the purification box 6 , and serpentine activated carbon plates 14 are arranged between the two gas collecting chambers 13 at equal intervals. One of the gas collecting chambers 13 is connected to the second pipeline 5 , and the other gas collecting chamber 13 is connected to the exhaust pipe 7 .

[0023] The working principle of the utility model is: when in use, the air intake pipe 2 is connected to the gas hot blast furnace, the exhaust gas of the gas hot blast furnace will enter the dust removal box 1 through the air intake pipe 2, the exhaust gas will pass through the filter 8, the filter 8 will filter the smoke and dust impurities in the exhaust gas, the filtered smoke and dust will enter the curved pipe 16 through the first pipe 3, the high-temperature exhaust gas passing through the curved pipe 16 is cooled by the cooling in the cooling chamber 15, thereby preventing the high-temperature exhaust gas from damaging the subsequent processing equipment, the cooled exhaust gas enters the gas collecting chamber 13, and then the exhaust gas passes through the serpentine activated carbon plate 14. During this process, the activated carbon plate will absorb and purify the toxic substances in the exhaust gas, and then discharge it through the exhaust pipe 7. The device filters and removes the smoke impurities in the exhaust gas before cooling the high-temperature exhaust gas, thereby preventing the high-temperature flue gas from adhering to the inner wall of the curved pipe 16 when passing through the curved pipe 16, which may easily cause the curved pipe 16 to be blocked and thus affect the cooling effect of the cooling water on the high-temperature flue gas.

[0024] The utility model provides an exhaust gas treatment device for a gas hot blast furnace, which filters smoke and dust impurities in the exhaust gas discharged from the gas hot blast furnace through a filter screen 8, and can clean impurities on the filter screen 8 and the inner wall of a dust removal box 1 through a cleaning component, the filtered exhaust gas passes through a curved pipe 16, and the high-temperature exhaust gas in the curved pipe 16 is cooled by cooling water, and the cooled exhaust gas is purified by a purification box 6 and then discharged. The device filters and removes smoke impurities in the exhaust gas before cooling the high-temperature exhaust gas, thereby preventing the high-temperature exhaust gas from adhering to the inner wall of the curved pipe 16 when passing through the curved pipe 16, which can easily cause blockage of the curved pipe 16 and thus affect the cooling effect of the cooling water on the high-temperature exhaust gas.

[0025] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An exhaust gas treatment device for a gas hot blast furnace, comprising a dust removal box, a cooling box and a purification box, wherein the dust removal box is connected to the cooling box through a first pipe, the cooling box is connected to the purification box through a second pipe, the dust removal box is provided with an air intake pipe, and the purification box is provided with an exhaust pipe, characterized in that: The dust removal box is provided with a filter for filtering smoke in the exhaust gas. The dust removal box is provided with a cleaning component for cleaning impurities on the filter and the inner wall of the dust removal box. A cooling cavity is provided in the cooling box. A bent pipe is provided between the first pipe and the second pipe, and the bent pipe is located in the cooling cavity.

2. The tail gas treatment device of a gas hot blast stove according to claim 1, characterized in that: The cleaning component includes a motor installed on the top of the dust removal box, the driving end of the motor is equipped with a rotating shaft located inside the dust removal box, connecting rods are installed on both sides of the rotating shaft, the connecting rods are fixedly connected to the scraper, and the scraper is in contact with the inner wall of the dust removal box and the filter.

3. The tail gas treatment device for a gas hot blast stove according to claim 1, characterized in that: A water tank is provided in the cooling box, a circulation pipe is provided between the water tank and the cooling cavity, a water pump is provided in the water tank, and the water pump is fixedly connected to a return pipe penetrating into the cooling cavity.

4. The tail gas treatment device for a gas hot blast stove according to claim 3, characterized in that: A cooling unit connected with the circulation pipe is arranged in the water tank.

5. The tail gas treatment device for a gas hot blast furnace according to claim 1, characterized in that: Gas collecting chambers are provided on both sides of the purification box, and serpentine activated carbon plates are arranged between the two gas collecting chambers at equal intervals, one of the gas collecting chambers is connected to the second pipeline, and the other gas collecting chamber is connected to the exhaust pipe.

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