Gas-making furnace capable of discharging ash without shutdown

Abstract

The utility model relates to the technical field of gas-making furnaces, and discloses a gas-making furnace capable of discharging ash without shutdown, which is characterized in that a rotating ash tray is mounted in the middle of the bottom surface of a furnace body, slag outlets with downward openings are formed in two sides of the lower part of the furnace body, and the slag outlets are connected with a V-shaped slag containing box positioned below the furnace body through flanges; bottom plate valves are installed at the positions, located above top inlets of the V-shaped slag containing boxes, of the furnace body respectively, each bottom plate valve is driven by a corresponding air cylinder, the upper portions of the V-shaped slag containing boxes are connected with pipelines connected with a steam pipe, and gate valve type ash discharging doors are installed at bottom outlets of the V-shaped slag containing boxes. According to the device, ash can be discharged without shutdown, the phenomenon of black smoke emission due to shutdown and blow-in of the chimney is avoided, and the environmental protection problem is solved. In the production process, the furnace does not need to be opened additionally, coal consumption and other expenses are effectively reduced, and labor work can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas-making furnaces, in particular to a gas-making furnace with ash discharge without furnace shutdown. Background Art

[0002] Most of the existing gas-making furnaces are fixed-bed intermittent type. After running for a period of time, the bottom of the furnace needs to be cleaned and ash discharged. The fixed-bed intermittent gas-making furnace needs to adopt the method of shutting down the furnace and manually discharging ash. That is: there is an ash bin with a volume of 1.2 cubic meters on each side of the chassis of the gas furnace. When the ash reaches a certain capacity (about 2-3 times per shift, and one more furnace needs to be started for each ash discharge), ash discharge is required. When discharging ash and shutting down the furnace, it is necessary to perform a complete up-blow (or second up-blow) according to the operating procedures until the blowing stage is shut down. The operator manually opens the ash bin doors on the left and right sides to discharge ash. The ash falls into the slag truck bucket. After discharging the ash, the operator manually closes the ash door, and then notifies the main operator to start the program control machine. The program control machine first executes a section of second up-blow according to the safety procedure, and then transfers to the normal operation program.

[0003] When a single furnace discharges ash and shuts down and starts up, valve conversion is required and part of the gas is vented, which not only reduces the production capacity of the gas-making furnace, but also causes waste of effective gas. In addition, each time of ash discharge, shutdown and startup will cause the chimney to be vented once, bringing great pressure to the company's environmental protection. Summary of the Invention

[0004] The utility model provides a gas-making furnace with ash discharge without furnace shutdown to solve the problems that when the existing fixed-bed intermittent gas-making furnace discharges ash, it is necessary to open the ash bin door, resulting in part of the gas being vented, reducing the production capacity of the gas-making furnace, causing waste of effective gas, and at the same time, each venting causes pressure on environmental protection.

[0005] The utility model is realized by adopting the following technical scheme:

[0006] A gas-making furnace with ash discharge without furnace shutdown includes a furnace body. A rotating ash pan is installed in the middle of the bottom surface of the furnace body. There are slag discharge openings with downward openings on both sides of the lower part of the furnace body. The slag discharge openings are connected by flanges to a V-shaped slag container located below the furnace body. The furnace body is respectively equipped with bottom plate valves above the top inlets of the V-shaped slag containers. Each bottom plate valve is driven by its own cylinder. The upper part of the V-shaped slag container is connected with a pipeline connected to a steam pipe. A plug valve type ash discharge door is installed at the bottom outlet of the V-shaped slag container.

[0007] During implementation, it includes a furnace body. The bottom of the furnace body is wider than the upper part. In the middle of the bottom surface of the furnace body, a rotating ash pan is installed to facilitate the discharge of ash and slag. The ash pan is driven by a grate machine installed below the furnace body. The grate machine is installed in the upper middle part of the V-shaped slag box, that is, above the upper part between the two slag pipes. On both sides of the lower part of the furnace body, slag discharge openings facing downward are provided. The slag discharge openings are connected by flanges to the V-shaped slag box located below the furnace body. The V-shaped slag box includes two V-shaped slag pipes and a bottom slag box. At the top of each of the two slag pipes, there is a top inlet. The bottoms of the two slag pipes are connected and lead into the bottom slag box. An outlet is provided on the bottom surface of the bottom slag box. The two slag discharge openings are connected to the two top inlets of the same V-shaped slag box;

[0008] On the top of the furnace body above the top inlets of the V-shaped slag box, a bottom plate valve is installed respectively. Above the top inlets of the V-shaped slag box on the furnace body, there is a constriction that cooperates with the bottom plate valve. Each bottom plate valve is driven by its own cylinder. On both sides outside the furnace body, cylinders extending into the furnace are installed. The free end of the piston rod of the cylinder is connected to the bottom plate valve. The piston rod is in the low position, and the top inlets of the V-shaped slag box are airtight above. Above each bottom plate valve, there is a water adding pipe respectively. On the water adding pipe, a manual stop valve and a hydraulic water adding valve are provided;

[0009] On the upper part of the V-shaped slag box, a pipeline connected to the steam pipe is connected. Specifically, on the steam pipe, a manual steam main valve and a hydraulic steam main valve are arranged in sequence. Between the manual steam main valve and the hydraulic steam main valve, a first steam pipe is connected. The first steam pipe is divided into a second steam pipe and a third steam pipe. The second steam pipe and the third steam pipe are respectively connected to both sides of the V-shaped slag box. On the second steam pipe and the third steam pipe, a manual stop valve and a hydraulic steam valve are provided respectively;

[0010] On the lower part of the V-shaped slag box, a manhole is opened, and the manhole is opened at the slag box of the V-shaped slag box;

[0011] At the bottom outlet of the V-shaped slag box, a flap valve type ash discharge door is installed. Below the flap valve type ash discharge door, a small belt conveyor is provided. The small belt conveyor is connected to a large belt conveyor, and the output end of the large belt conveyor is connected to the slag yard.

[0012] During use, when the gasifier needs to discharge ash, the cylinder pushes the bottom plate valve to cooperate with the constriction, so that the top inlets of the V-shaped slag box are closed above, that is, the inlets of the V-shaped slag box no longer continue to receive ash. The temperature and pressure in the V-shaped slag box are adjusted by passing steam from the steam drum through the second steam pipe and the third steam pipe. The flap valve type ash discharge door is opened, so that the ash and slag in the V-shaped slag box are poured onto the small belt conveyor, and then transported to the slag yard through the large belt conveyor. During the whole process, the furnace body is not emptied, effectively avoiding furnace shutdown and reducing the problem of production capacity decline caused by gas venting. After the slag discharge is completed, the flap valve type ash discharge door is closed, the piston rod of the cylinder is pulled, and the bottom plate valve is opened. The V-shaped slag box continues to receive slag, that is, the ash and slag enter the two slag pipes through the slag discharge openings and converge into the slag box at the bottom of the slag pipes.

[0013] When it is necessary to adjust the temperature and pressure at the slag outlet, by opening the hydraulic water addition valve, the water addition pipe flushes water above the bottom plate valve in the furnace body to reduce the temperature.

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

[0015] The gasifier for ash discharge without furnace shutdown provided by the utility model separates the ash storage in the gasifier from the furnace body by installing a V-shaped slag storage tank. Through the opening and closing cooperation of the V-shaped slag storage tank, ash discharge without furnace shutdown is realized, eliminating the phenomenon of black smoke emission from the chimney during furnace shutdown and startup, and solving the environmental protection problem. During the production process, there is no need to open multiple furnaces, effectively reducing coal consumption and other costs, reducing labor employment, and reducing the workload of the staff in each shift, with obvious economic, environmental protection, and practical values. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It shows the structural schematic diagram of the utility model.

[0017] Figure 2 It shows the side structural schematic diagram of the utility model.

[0018] Figure 3 It shows the installation position diagram of the utility model.

[0019] In the figure: 1 - furnace body, 2 - V-shaped slag storage tank, 3 - bottom plate valve, 4 - steam pipe, 5 - ash discharge door of slide valve type, 6 - manhole, 7 - small belt conveyor, 8 - large belt conveyor, 9 - water addition pipe, 10 - manual main steam valve, 11 - hydraulic main steam valve, 12 - first steam pipe, 13 - second steam pipe, 14 - third steam pipe, 15 - hydraulic steam valve, 16 - hydraulic water addition valve, 17 - grate machine, 18 - cylinder, 19 - slag yard, 20 - road, 21 - slag outlet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following describes the specific embodiments of the utility model with reference to the accompanying drawings.

[0021] A gasifier for ash discharge without furnace shutdown, as Figures 1 to 3As shown in the figure: It includes a furnace body 1. The bottom of the furnace body is wider than the upper part. In the middle of the bottom surface of the furnace body 1, a rotating ash pan is installed to facilitate the discharge of ash and slag. The ash pan is driven by a grate machine 17 installed below the furnace body. The grate machine 17 is installed in the upper middle part of the V-shaped slag box 2 below the furnace body, that is, in the upper part between the two slag pipes. On both sides of the lower part of the furnace body 1, there are slag discharge ports 21 opening downward. The slag discharge ports 21 are connected to the V-shaped slag box 2 located below the furnace body 1 through flanges. The V-shaped slag box 2 includes two V-shaped slag pipes and a bottom slag box. At the top of each of the two slag pipes, there is a top inlet. The bottoms of the two slag pipes are connected and lead into the bottom slag box. The bottom surface of the bottom slag box is provided with an outlet. The two slag discharge ports 21 are connected to the two top inlets of the same V-shaped slag box 2;

[0022] At the top inlet of the V-shaped slag box 2 above the furnace body 1, a bottom plate valve 3 is installed respectively. Above the top inlet of the V-shaped slag box 2 of the furnace body, there is a constriction that cooperates with the bottom plate valve 3. Each bottom plate valve 3 is driven by its own cylinder. On both sides outside the furnace body 1, cylinders 18 extending into the furnace are installed. The free end of the piston rod of the cylinder 18 is connected to the bottom plate valve 3. The piston rod is in the low position, and the top inlet of the V-shaped slag box 2 is sealed above. Above each bottom plate valve 3, there is a water adding pipe 9 respectively. On the water adding pipe 9, there are a manual stop valve and a hydraulic water adding valve 16;

[0023] On the upper part of the V-shaped slag box 2, a pipeline connected to the steam pipe 4 is connected. Specifically, on the steam pipe 4, a manual steam main valve 10 and a hydraulic steam main valve 11 are arranged in sequence. Between the manual steam main valve 10 and the hydraulic steam main valve 11, a first steam pipe is connected. The first steam pipe 12 is divided into a second steam pipe 13 and a third steam pipe 4. The second steam pipe 13 and the third steam pipe 4 are respectively connected to both sides of the V-shaped slag box 2. On the second steam pipe 13 and the third steam pipe 14, there are a manual stop valve and a hydraulic steam valve 15 respectively;

[0024] On the lower part of the V-shaped slag box 2, a manhole 6 is opened. The manhole 6 is opened at the slag box of the V-shaped slag box 2;

[0025] At the bottom outlet of the V-shaped slag box 2, a flap valve type ash discharge door 5 is installed, which is made of a special DN600 flap valve. Below the flap valve type ash discharge door 5, a small belt conveyor 7 is provided. The length of the small belt conveyor is 6m and the width is 650mm. In this embodiment, there are multiple gas-making furnaces. The small belt conveyor is connected to its respective gas-making furnace. Multiple small belt conveyors 7 are connected to a large belt conveyor 8. The output end of the large belt conveyor 8 is connected to a slag yard 19; The large belt conveyor 8 includes a slag receiving section connected to the small belt conveyor 7. The length of the slag receiving section is 180m, which can accommodate the ash and slag recovery of 16 gas-making furnaces. The slag receiving section is connected to an inclined section passing through the road. The lifting height of the inclined section is 5 meters and the inclination angle is 16°.

[0026] During use, when the gasifier needs to discharge ash, the cylinder pushes the bottom plate valve 3 to cooperate with the isthmus, closing the top inlet of the V-shaped slag storage tank 2, that is, the inlet of the V-shaped slag storage tank 2 no longer continues to receive ash. The temperature and pressure in the V-shaped slag storage tank 2 are adjusted by steam from the steam drum passing through the second steam pipe 4 and the third steam pipe 4. The flap valve type ash discharge door 5 is opened, and the ash and slag in the V-shaped slag storage tank 2 are poured onto the small belt conveyor 7, and then transported to the slag yard 19 across the road 20 by the large belt conveyor 8. During the whole process, the furnace body is not emptied, effectively avoiding furnace shutdown and reducing the problem of production capacity decline caused by gas venting. After the slag discharge is completed, the flap valve type ash discharge door 5 is closed, the piston rod of the cylinder 18 is pulled, the bottom plate valve 3 is opened, and the V-shaped slag storage tank 2 continues to receive slag, that is, the ash and slag enter the two slag storage pipes through the slag discharge port 21 and converge at the bottom of the slag storage pipes into the slag tank.

[0027] When it is necessary to adjust the temperature and pressure at the slag discharge port 21, the hydraulic water addition valve 16 is opened, and the water supply pipe flushes water above the bottom plate valve in the furnace body to reduce the temperature.

[0028] The scope of protection claimed by the present utility model is not limited to the above specific embodiments. Moreover, for those skilled in the art, the present utility model can have various deformations and modifications. Any modification, improvement, and equivalent replacement made within the concept and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A gasification furnace with non-stop ash discharge, comprising a furnace body (1), a rotating ash pan is installed in the middle of the bottom surface of the furnace body (1), and both sides of the lower part of the furnace body (1) are provided with slag discharge ports (21) opening downward, characterized in that: The slag outlet (21) is connected to a V-shaped slag container (2) located below the furnace body (1) via a flange. The furnace body (1) is respectively provided with a bottom plate valve (3) above the top inlet of the V-shaped slag container (2), and each bottom plate valve (3) is driven by its own cylinder. The upper part of the V-shaped slag container (2) is connected to a pipeline connected to a steam pipe (4), and the bottom outlet of the V-shaped slag container (2) is provided with a plug-in valve type ash discharge door (5).

2. The gasification furnace with non-stop ash removal according to claim 1, characterized in that: Cylinders (18) extending into the furnace are installed on both sides of the furnace body (1), the free end of the piston rod of the cylinder (18) is connected to the bottom plate valve (3), the piston rod is in a low position, and the top of the top inlet of the V-shaped slag container (2) is sealed.

3. The gasification furnace with non-stop ash removal according to claim 1, characterized in that: A small belt conveyor (7) is provided below the gate valve type ash lowering door (5), the small belt conveyor (7) is connected to a large belt conveyor (8), and the output end of the large belt conveyor (8) is connected to a slag yard (19).

4. The gasification furnace with non-stop ash removal according to claim 1, characterized in that: The steam pipe (4) is provided with a manual steam main valve (10) and a hydraulic steam main valve (11) in sequence; a first steam pipe (12) is connected between the manual steam main valve (10) and the hydraulic steam main valve (11); the first steam pipe (12) is divided into a second steam pipe (13) and a third steam pipe (4); the second steam pipe (13) and the third steam pipe (4) are respectively connected to two sides of the V-shaped slag container (2); the second steam pipe (13) and the third steam pipe (14) are respectively provided with a manual stop valve and a hydraulic steam valve (15).

5. The gasification furnace with non-stop ash removal according to claim 1, characterized in that: A respective water supply pipe (9) is provided above each base plate valve (3), and a manual stop valve and a hydraulic water supply valve (16) are provided on the water supply pipe (9).

6. The gasification furnace with non-stop ash removal according to claim 1, characterized in that: The two slag outlets (21) are connected to two top inlets of the same V-shaped slag container (2).

7. The gasification furnace with non-stop ash removal according to claim 1, characterized in that: A hand hole (6) is provided at the bottom of the V-shaped slag container (2).

8. The gasification furnace with non-stop ash removal according to claim 1, characterized in that: The V-shaped slag container (2) comprises two V-shaped slag container pipes and a bottom slag container, the top of the two slag container pipes is respectively provided with a top inlet, the bottoms of the two slag container pipes are connected and connected to the bottom slag container, the bottom surface of the bottom slag container is provided with an outlet, and two slag outlets (21) are connected to the two top inlets of the same V-shaped slag container (2).

9. The gasification furnace with non-stop ash removal according to claim 8, characterized in that: The ash pan is driven by a grate machine (17) installed below the furnace body (1), and the grate machine (17) is installed at the upper part between two slag containing pipes of the V-shaped slag containing box (2).

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