Steel furnace

Abstract

The utility model relates to the technical field of steel-making furnaces, in particular to a steel-making furnace, which comprises a steel-making furnace main body, a smoke exhaust pipe arranged at the top of the steel-making furnace main body, a connecting pipe arranged above the smoke exhaust pipe, a cooling box connected with the right end of the connecting pipe and used for primarily cooling smoke, a flow guide pipe arranged at the bottom of the cooling box, and a spraying box arranged at the tail end of the flow guide pipe and used for secondarily cooling the smoke. A curved pipe is arranged at the right end of the spraying box, and a filter box for intercepting and filtering particulate matters in the flue gas is arranged at the right end of the curved pipe; according to the steel-making furnace, the connecting pipe is arranged to be matched with the smoke exhaust pipe at the top of the steel-making furnace body in an inserted mode, generated smoke is guided to enter the cold area box and enter the spraying box under the preliminary cooling effect of cooling water circularly circulating in the water storage bin, the circulating pump pumps an aqueous solution added into the spraying box, the smoke is secondarily cooled through the multiple nozzles, and the cooling effect is improved. The cooled flue gas is guided through the curved pipe, water vapor is prevented from being discharged into the filter box, and metal particles and dust particles in the cooled flue gas are filtered and intercepted under the cooperation of the filter cotton.

Description

A steelmaking furnace Technical Field

[0001] This utility model relates to the field of steelmaking furnace technology, specifically to a steelmaking furnace. Background Technology

[0002] Steelmaking furnaces are indispensable equipment in steel production. They convert pig iron into steel through processes such as high temperature and high pressure. Steelmaking furnaces can be divided into various types according to different processes and application scenarios, including converters, electric furnaces, and oxygen converters.

[0003] Utility model patent CN219714049U discloses a cooling device for flue gas from a steelmaking furnace, including a cooling box. A flue gas pipe is inserted inside the cooling box. A flow pipe is fixedly connected to one end of the flue gas pipe, and a fan is fixedly connected to the other end of the flue gas pipe. A semiconductor cooling block is fixedly connected to one side of the cooling box. A circulation pipe is sleeved outside the flow pipe, and a cooling box is installed outside the circulation pipe. Fixed boxes are inserted at both ends of the circulation pipe, and a support plate is fixedly connected to the top of the fixed box.

[0004] The above technical solution, through the aforementioned structure, utilizes a float plate within the fixed housing to provide buoyancy, facilitating the control of water injection and flow cessation via the water supply pipe. Initially, when the water level inside the fixed housing drops, the top plate contacts the first contact sensor block, initiating the water injection operation. Subsequently, the float plate floats, and when the top plate contacts the second contact sensor block, the water injection operation is stopped, effectively eliminating the need for manual operation by staff. However, the flue gas emitted from the steelmaking furnace suffers from limited cooling and contains particulate matter that is difficult to filter quickly, potentially clogging subsequent filtration processes and hindering the continuous guidance of flue gas emissions. Summary of the Invention

[0005] The purpose of this utility model is to provide a steelmaking furnace to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A steelmaking furnace includes a main body, a flue pipe at the top of the main body, a connecting pipe above the flue pipe, a cooling box for initial flue gas cooling at the right end of the connecting pipe, a guide pipe at the bottom of the cooling box, a spray box for secondary flue gas cooling at the end of the guide pipe, a curved pipe at the right end of the spray box, and a filter box for intercepting and filtering particulate matter in the flue gas at the right end of the curved pipe.

[0008] The top of the cooling box has several ventilation slots, all of which penetrate the cooling box. The hollow area between the outer wall of the cooling box and the inner wall of the ventilation slots is a water storage tank. A water inlet pipe is provided on the front side of the cooling box near the bottom, and a drain pipe is provided on the front side of the cooling box near the top.

[0009] A circulation pump is provided on the front face of the spray box near the bottom right end. The water pumping pipe of the circulation pump extends into the interior of the spray box, and the end of the water supply pipe of the circulation pump extends to the top of the inner wall of the spray box. Several spray pipes are provided at the end of the water supply pipes, and several nozzles are provided on the spray pipes.

[0010] The filter box is equipped with filter cotton inside, and a sealing cover is provided on the top of the filter box. An exhaust pipe communicating with the interior is provided on the right end of the filter box.

[0011] Furthermore, the lower surface of the steelmaking furnace body is provided with several support feet, which are distributed in a ring at equal intervals. The top of the support feet is welded and fixed to the bottom of the steelmaking furnace body, and the flue pipe is connected to the interior of the steelmaking furnace body.

[0012] In this invention, the supporting feet help to lift the main body of the steelmaking furnace, increasing its stability when placed independently, and the exhaust pipe guides the internal flue gas for centralized discharge.

[0013] Specifically, the inner diameter of the left end of the connecting pipe is adapted to the outer diameter of the exhaust pipe, and the right end of the connecting pipe is welded and fixed to the top of the cooling box.

[0014] In this invention, the connecting pipe is inserted into the exhaust pipe to guide the flue gas discharged from the exhaust pipe into the cooling box for initial cooling.

[0015] It should be noted that the ventilation slots are distributed in a ring at equal intervals, the drain pipe and the water inlet pipe are welded and fixed to the cooling box, the drain pipe and the water inlet pipe are interconnected with the interior of the water storage tank, the drain pipe is connected to the external cooling water collection pipe, and the water inlet pipe is connected to the external cooling water delivery pipe.

[0016] In this invention, the inlet pipe is connected to an external cooling water delivery pipe to continuously deliver room temperature cooling water to the water storage tank. With the cooperation of multiple ventilation slots, the contact area between the flue gas and the cooling water is increased. The cooling water absorbs heat and carries away the heat in the flue gas. The cooled water that has absorbed heat is discharged from the drain pipe, which helps to maintain room temperature cooling water in the water storage tank and carry out preliminary flue gas cooling.

[0017] Furthermore, the top of the guide pipe is welded and fixed to the bottom of the cooling box, the right end of the guide pipe extends into the interior of the spray box, and the right end of the guide pipe is welded and fixed to the left side of the spray box.

[0018] In the present utility model, the flue gas after preliminary cooling is discharged from the bottom of the ventilation groove and enters the diversion pipe, and is guided into the spray box to perform secondary cooling and cooling cooperation on the flue gas.

[0019] It is worth supplementing that a discharge port is provided at the bottom near the left end on the front end face of the spray box, and a water inlet is provided at the top near the left end on the front end face of the spray box. Sealing plugs are provided at the ends of the discharge port and the water inlet.

[0020] In the present utility model, the sealing plug on the water inlet is opened to facilitate filling the aqueous solution to be sprayed from the water inlet into the spray box. The sealing plug on the discharge port is opened to facilitate replacing the sprayed aqueous solution inside the spray box.

[0021] Furthermore, the bottom of the circulation pump is fixedly connected to the spray box by screws. The outer wall end of the water suction pipe of the circulation pump is adhesively fixed to the outer package of the spray box. The end of the water delivery pipe of the circulation pump is welded and fixed to the spray pipe. The nozzles are distributed at equal intervals.

[0022] In the present utility model, the circulation pump is connected to an external power supply through a wire. The control switch is started. The water suction pipe extracts the aqueous solution inside the spray box and continuously sprays it from the nozzles on the spray pipe to cooperate with the cooling of the passing flue gas, reduce the scalding of the filtering structure by the high-temperature flue gas, and avoid the damage of the high-temperature flue gas to the surrounding environment.

[0023] In addition, the curved pipe is in a shape of a capital letter "J". The left end of the curved pipe is welded and fixed to the spray box, and the right end is welded and fixed to the filter box. The width of the outer wall of the filter cotton is adapted to the width of the inner wall of the filter box. The top of the sealing cover is fixedly connected to the filter box by screws. The left end of the exhaust pipe is welded and fixed to the filter box.

[0024] In the present utility model, the middle of the curved pipe arches up to prevent the sprayed water vapor from entering the filter box under the action of gravity. The mesh number of the filter cotton is 60 meshes, which can filter fine metal particles and dust particles in the cooled flue gas, reduce the blockage of the pipeline when the flue gas enters the treatment structure, and the exhaust pipe guides the filtered flue gas into the pipe fittings to be treated for subsequent flue gas treatment cooperation. The screws on the sealing cover can be disassembled to facilitate opening the sealing cover to replace and clean the internal filter cotton.

[0025] Compared with the prior art, the beneficial effects of the present utility model are:

[0026] 1. This utility model guides the generated flue gas into the cold zone box by connecting the connecting pipe to the exhaust pipe at the top of the steelmaking furnace. Under the initial cooling effect of the cooling water circulating in the water storage tank, the high temperature flue gas is reduced and then enters the spray box. The circulating pump draws the aqueous solution added to the spray box and cools the flue gas a second time through multiple nozzles. The cooled flue gas is guided through the curved pipe to prevent water vapor from entering the filter box. With the help of filter cotton, metal particles and dust particles in the cooled flue gas are filtered and intercepted.

[0027] This invention increases the contact area between the flue gas requiring cooling and the cooling water in the water storage tank by setting multiple ventilation slots, thereby achieving initial rapid cooling. The water inlet pipe is connected to the external cooling water delivery pipe to continuously deliver room temperature cooling water. The drain pipe guides the cooling water that has absorbed heat to be discharged from the top for centralized collection and natural cooling. The spray box is equipped with a discharge port to facilitate the discharge and replacement of the internal aqueous solution. With the water inlet, it is helpful for the spray box to be filled with the aqueous solution required for cooling. Attached Figure Description

[0028] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0029] Figure 2 is a schematic diagram of the main structure of the steelmaking furnace of this utility model;

[0030] Figure 3 is a schematic diagram of the combined structure of the connecting pipe and the cooling box of this utility model;

[0031] Figure 4 is a schematic diagram of the separation structure of the spray box and the circulating pump of this utility model;

[0032] Figure 5 is a schematic diagram of the filter box structure of this utility model;

[0033] Figure 6 is a schematic diagram of the overall cross-sectional structure of this utility model.

[0034] The meanings of the labels in the diagram are as follows:

[0035] 1. Steelmaking furnace body; 10. Exhaust pipe; 11. Support legs;

[0036] 2. Connecting pipe;

[0037] 3. Cooling tank; 30. Ventilation duct; 31. Water storage tank; 32. Drain pipe; 33. Water inlet pipe; 34. Diversion pipe;

[0038] 4. Spray box; 40. Circulating pump; 41. Spray pipe; 410. Spray head; 42. Discharge port; 43. Inlet;

[0039] 5. Curved tube;

[0040] 6. Filter box; 60. Filter cotton; 61. Sealing cover; 62. Exhaust pipe. Detailed Implementation

[0041] 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.

[0042] Please refer to Figures 1-6. This embodiment provides a technical solution:

[0043] A steelmaking furnace includes a steelmaking furnace body 1, a flue pipe 10 on the top of the steelmaking furnace body 1, and a plurality of support feet 11 on the lower surface of the steelmaking furnace body 1. The support feet 11 are distributed in a ring at equal intervals. The top of the support feet 11 is welded and fixed to the bottom of the steelmaking furnace body 1. The flue pipe 10 is connected to the interior of the steelmaking furnace body 1.

[0044] In this utility model, with the cooperation of the support feet 11, it helps to support the main body 1 of the steelmaking furnace, increasing the stability of independent placement, and the exhaust pipe 10 guides the internal flue gas to be discharged in a concentrated manner.

[0045] Furthermore, a connecting pipe 2 is provided above the exhaust pipe 10. The right end of the connecting pipe 2 is connected to a cooling box 3 for preliminary flue gas cooling. The inner diameter of the left end of the connecting pipe 2 is matched with the outer diameter of the exhaust pipe 10. The right end of the connecting pipe 2 is welded and fixed to the top of the cooling box 3.

[0046] In this invention, the connecting pipe 2 is inserted into the exhaust pipe 10 to guide the flue gas discharged from the exhaust pipe 10 into the cooling box 3 for initial cooling.

[0047] Specifically, the bottom of the cooling box 3 is provided with a guide pipe 34, the end of the guide pipe 34 is provided with a spray box 4 for secondary cooling of flue gas, the right end of the spray box 4 is provided with a curved pipe 5, and the right end of the curved pipe 5 is provided with a filter box 6 for intercepting and filtering particulate matter in the flue gas.

[0048] It should be noted that the top of the cooling box 3 has several ventilation slots 30, all of which penetrate the cooling box 3. The hollow area between the outer wall of the cooling box 3 and the inner wall of the ventilation slots 30 is a water storage tank 31. A water inlet pipe 33 is provided on the front side of the cooling box 3 near the bottom, and a drain pipe 32 is provided on the front side of the cooling box 3 near the top. The ventilation slots 30 are distributed in a ring at equal intervals. The drain pipe 32 and the water inlet pipe 33 are both welded and fixed to the cooling box 3. The drain pipe 32 and the water inlet pipe 33 are both interconnected with the interior of the water storage tank 31. The drain pipe 32 is connected to the external cooling water collection pipe, and the water inlet pipe 33 is connected to the external cooling water delivery pipe.

[0049] In this invention, the inlet pipe 33 is connected to an external cooling water delivery pipe to continuously deliver room temperature cooling water to the water storage tank 31. With the cooperation of multiple ventilation slots 30, the contact area between the flue gas and the cooling water is increased. The cooling water absorbs heat and carries away the heat in the flue gas. The cooled water after absorbing heat is discharged from the drain pipe 32, which helps to maintain room temperature cooling water in the water storage tank 31 and carry out preliminary flue gas cooling.

[0050] Furthermore, the top of the guide pipe 34 is welded and fixed to the bottom of the cooling box 3, the right end of the guide pipe 34 extends into the interior of the spray box 4, and the right end of the guide pipe 34 is welded and fixed to the left side of the spray box 4.

[0051] In this invention, the flue gas, after initial cooling, is discharged from the bottom of the ventilation trough 30 into the guide pipe 34 and guided into the spray box 4 for secondary cooling of the flue gas.

[0052] Specifically, a discharge port 42 is provided on the front end face of the spray box 4 near the bottom left end, and a water inlet 43 is provided on the front end face of the spray box 4 near the top left end. Both the discharge port 42 and the water inlet 43 are provided with sealing plugs at their ends.

[0053] In this invention, the sealing plug on the inlet 43 is opened to facilitate the filling of the water solution to be sprayed into the spray box 4 from the inlet 43, and the sealing plug on the outlet 42 is opened to facilitate the replacement of the spray water solution inside the spray box 4.

[0054] It is worth noting that a circulating pump 40 is provided on the front face of the spray box 4 near the bottom right end. The water pump 40's suction pipe extends into the interior of the spray box 4, and the end of the water pump 40's delivery pipe extends to the top of the inner wall of the spray box 4. Several spray pipes 41 are provided at the end of the delivery pipe, and several nozzles 410 are provided on the spray pipes 41. The bottom of the circulating pump 40 is fixedly connected to the spray box 4 by screws. The end of the outer wall of the circulating pump 40's suction pipe is bonded and fixed to the outer casing of the spray box 4. The end of the water pump 40's delivery pipe is welded and fixed to the spray pipes 41. The nozzles 410 are distributed at equal intervals.

[0055] In this invention, the circulating pump 40 is connected to an external power source via a wire, and the control switch is activated. The water pumping pipe draws the aqueous solution from inside the spray tank 4 and continuously sprays it from the nozzle 410 on the spray pipe 41. This cools the passing flue gas, reduces the damage to the filter structure caused by the high-temperature flue gas, and avoids the impact of the high-temperature flue gas on the surrounding environment.

[0056] Furthermore, the filter box 6 is equipped with filter cotton 60 inside, a sealing cover 61 is provided on the top of the filter box 6, and an exhaust pipe 62 communicating with the interior is provided on the right end of the filter box 6.

[0057] Specifically, the curved pipe 5 is in a shape of a Chinese character 'ji', the left end of the curved pipe 5 is fixedly welded to the spray box 4, and the right end is fixedly welded to the filter box 6. The width of the outer wall of the filter cotton 60 is adapted to the width of the inner wall of the filter box 6. The top of the sealing cover 61 is fixedly connected to the filter box 6 by screws. The left end of the exhaust pipe 62 is fixedly welded to the filter box 6.

[0058] In the present utility model, the middle of the curved pipe 5 bulges, which can prevent the water vapor sprayed from entering the filter box 6 through the curved pipe 5 under the action of gravity. The mesh number of the filter cotton 60 is 60 meshes, which can filter the fine metal particles and dust particles in the cooled flue gas, reduce the influence of blockage of the pipeline when the flue gas enters the treatment structure. The exhaust pipe 62 guides the filtered flue gas into the pipe fittings to be treated for subsequent flue gas treatment cooperation. The screws on the sealing cover 61 can be disassembled, which is convenient to open the sealing cover 61 to replace and clean the internal filter cotton 60.

[0059] When the steelmaking furnace of this embodiment is in use, first, the cooling box 3 with the ventilation groove 30 is plugged and matched with the exhaust pipe 10 at the top of the steelmaking furnace main body 1 through the connecting pipe 2. Then, the cooling box 3 and the spray box 4 are connected through the diversion pipe 34. The spray pipe 41 with the nozzle 410 is connected to the water delivery pipe on the circulating pump 40, and the water suction pipe on the circulating pump 40 extends into the spray box 4. The spray box 4 is fixedly combined with the filter box 6 with the filter cotton 60 through the curved pipe 5;

[0060] Then, the water inlet pipe 33 is connected to the external cooling water delivery pipeline to continuously deliver cooling water into the water storage tank 31. The drain pipe 32 is connected to the external cooling water collection pipeline. Then, the aqueous solution to be sprayed is added to the spray box 4 from the water inlet 43. The end of the discharge port 42 is blocked by a sealing plug. The control switch on the outer wall of the circulating pump 40 is started to continuously extract the aqueous solution inside the spray box 4 for spraying cooperation;

[0061] The flue gas generated by steel melting in the steelmaking furnace main body 1 enters the connecting pipe 2 from the exhaust pipe 10 and then enters the cooling box 3. With the cooperation of multiple ventilation grooves 30, it contacts the cooling water in the water storage tank 31 through the inner wall of the cooling box 3 for preliminary cooling cooperation. Then, it enters the spray box 4 through the diversion pipe 34 and is cooled secondly by contacting the sprayed aqueous solution. The cooled flue gas enters the filter box 6, and under the adsorption and filtration of the filter cotton 60, the dust particles and metal particles are reduced from being discharged into the treatment pipeline, reducing the blockage influence. And when the sealing plug on the discharge port 42 is opened to replace the aqueous solution in the spray box 4, it helps for the secondary cooling cooperation of the flue gas next time. The overall combination is convenient for installation, disassembly and operation.

Claims

1. A steelmaking furnace, comprising a main body, characterized in that: A smoke exhaust pipe is provided at the top of the main body of the steelmaking furnace. A connecting pipe is provided above the smoke exhaust pipe. The right end of the connecting pipe is connected to a cooling box for initially cooling the flue gas. A diversion pipe is provided at the bottom of the cooling box. The end of the diversion pipe is provided with a spray box for secondary cooling of the flue gas. A curved pipe is provided at the right end of the spray box. A filter box for intercepting and filtering particulate matter in the flue gas is provided at the right end of the curved pipe; A plurality of ventilation slots are opened at the top of the cooling box, and the ventilation slots penetrate through the cooling box. The hollow area between the outer wall surface of the cooling box and the inner wall surface of the ventilation slots is a water storage tank. A water inlet pipe is provided at the bottom near the front side of the cooling box, and a drain pipe is provided at the top near the front side of the cooling box; A circulation pump is provided at the bottom near the right end of the front end face of the spray box. The suction pipe of the circulation pump extends into the interior of the spray box. The end of the delivery pipe of the circulation pump extends to the top of the inner wall of the spray box, and a plurality of spray pipes are provided at the end of the delivery pipe. A plurality of nozzles are provided on the spray pipes; Filter cotton is provided inside the filter box. A sealing cover is provided at the top of the filter box. An exhaust pipe communicating with the interior is provided at the right end of the filter box.

2. The steelmaking furnace according to claim 1, characterized in that: A plurality of support feet are provided on the lower surface of the main body of the steelmaking furnace. The support feet are evenly distributed in a ring shape. The top of the support feet is fixedly welded to the bottom of the main body of the steelmaking furnace. The smoke exhaust pipe is communicated with the interior of the steelmaking furnace main body.

3. The steelmaking furnace according to claim 1, characterized in that: The inner diameter of the left end of the connecting pipe is adapted to the outer diameter of the smoke exhaust pipe. The right end of the connecting pipe is fixedly welded to the top of the cooling box.

4. The steelmaking furnace according to claim 1, characterized in that: The ventilation slots are evenly distributed in a ring shape. The drain pipe and the water inlet pipe are both fixedly welded to the cooling box. The drain pipe and the water inlet pipe are both communicated with the interior of the water storage tank. The drain pipe is connected to an external cooling water collection pipe, and the water inlet pipe is connected to an external cooling water delivery pipe.

5. The steelmaking furnace according to claim 1, characterized in that: The top of the diversion pipe is fixedly welded to the bottom of the cooling box. The right end of the diversion pipe extends into the interior of the spray box, and the right end of the diversion pipe is fixedly welded to the left side surface of the spray box.

6. The steelmaking furnace according to claim 1, characterized in that: An emission port is provided at the bottom near the left end of the front end face of the spray box. An inlet port is provided at the top near the left end of the front end face of the spray box. Sealing plugs are provided at the ends of the emission port and the inlet port.

7. The steelmaking furnace according to claim 1, characterized in that: The bottom of the circulation pump is fixedly connected to the spray box by screws. The outer wall end of the suction pipe of the circulation pump is adhesively fixed to the outer package of the spray box. The end of the delivery pipe of the circulation pump is fixedly welded to the spray pipe. The nozzles are evenly distributed.

8. The steelmaking furnace according to claim 1, characterized in that: The curved pipe is in a shape of a capital letter "J". The left end of the curved pipe is fixedly welded to the spray box, and the right end is fixedly welded to the filter box. The width of the outer wall of the filter cotton is adapted to the width of the inner wall of the filter box. The top of the sealing cover is fixedly connected to the filter box by screws. The left end of the exhaust pipe is fixedly welded to the filter box.

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