Biomass gasifier circulating water system and gasifier

Abstract

The utility model discloses the technical field of biomass gasification furnaces, and particularly relates to a biomass gasification furnace circulating water system and a gasification furnace, the biomass gasification furnace circulating water system comprises a furnace body, a furnace barrel and a furnace grate, a slag window is arranged at the bottom of the furnace barrel, an upper sealing plate and a lower sealing plate are fixedly connected between the side wall of the furnace barrel and the furnace body, and the space between the outer wall of the furnace barrel and the upper sealing plate and the lower sealing plate is an upper cavity; a partition bar is fixedly connected between the bottom of the furnace body and the furnace barrel, one-way sealing plates are arranged at the bottom of the furnace barrel, located on the two sides of the partition bar and used for sealing half of the slag window, a sealing hopper is fixedly connected to the bottom of the furnace barrel, and a sealing door is rotationally connected to the upper end of the discharging window. The space between the partition bar and the lower portion of the closed hopper and the space between the partition bar and the inner top of the furnace body are a lower cavity, a middle plate is arranged in the middle of the connecting belt, and the middle of the connecting belt communicates with the middle of the hollow circular ring.

Description

Technical Field

[0001] The present invention relates to the technical field of biomass gasifiers, and specifically to a biomass gasifier circulating water system and a gasifier. Background Technique

[0002] A biomass boiler is a boiler that uses biomass energy as fuel. The biomass energy utilization technology is a technology that converts original agricultural wastes such as straw into combustible gases by burning biomass particles. It can not only make full use of the rich straw resources, but also improve the ecological environment. It is relatively energy-saving and environmentally friendly, and is convenient for installation and use.

[0003] When the biomass gasifier is in use, due to long-term high-temperature operation, the grate is prone to deformation. Under the action of long-term high temperature, the waste residue located below will generate relevant harmful gases. These gases are mixed with the generated gas, reducing the use value of the gas. Therefore, it is necessary to cool the grate, furnace body and slag of the biomass gasifier. Among them, the cooling of the slag is generally to directly discharge it into water for cooling. This method can not only cool the slag but also seal the bottom to prevent gas overflow. At present, the cooling processes of the grate and furnace body on the market are relatively simple, with poor cooling effects, and the slag discharged into the water is difficult to recycle, treat and discharge, which will also cause excess sewage.

[0004] Based on this, the present invention designs a biomass gasifier circulating water system and a gasifier to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a biomass gasifier circulating water system and a gasifier to solve the problems in the above background technique that the cooling processes of the grate and furnace body on the market are relatively simple, with poor cooling effects, and the slag discharged into the water is difficult to recycle, treat and discharge, which will also cause excess sewage.

[0006] To achieve the above object, the present invention provides the following technical solution: A circulating water system for a biomass gasifier, comprising a furnace body, a furnace cylinder and a furnace grate. A slag window is provided at the bottom of the furnace cylinder. An upper sealing plate and a lower sealing plate are fixedly connected between the side wall of the furnace cylinder and the furnace body. The space between the outer wall of the furnace cylinder and the upper and lower sealing plates is an upper cavity. A partition bar is fixedly connected between the bottom of the furnace body and the furnace cylinder. The partition bar is located in the middle of the slag window. A one-way sealing plate is provided at the bottom of the furnace cylinder. The one-way sealing plate is located on both sides of the partition bar and is used to close half of the slag window. A closed hopper is fixedly connected to the bottom of the furnace cylinder. Discharge windows are provided at the front and rear ends of the furnace body. A closing door is rotatably connected to the upper end of the discharge window. The space between the partition bar and the bottom of the closed hopper and the inner top of the furnace body is a lower cavity. The furnace grate includes a plurality of hollow rings and connecting bands. An intermediate plate is provided in the middle of the connecting band. The middle of the connecting band communicates with the middle of the hollow ring. Water inlet pipes and water outlet pipes are respectively provided on both symmetric sides of the furnace grate. Cooling pipes and return pipes are communicated outside the upper cavity and the lower cavity.

[0007] As a further aspect of the present invention, the space between the closed hopper and the bottom of the furnace cylinder is a slag storage cavity. A guiding slide bar and a window opening telescopic rod are installed in the slag storage cavity. The one-way sealing plate is tightly arranged at the bottom of the furnace cylinder through the guiding slide bar. The window opening telescopic rod is used to pull the one-way sealing plate to move outward and open the slag window.

[0008] As a further aspect of the present invention, one end of the window opening telescopic rod is rotatably connected to the inner side wall of the furnace body, and the other end is rotatably connected to the side wall of the one-way sealing plate. The guiding slide bar matches the shape of the bottom of the furnace cylinder and one end is fixedly connected to the side wall of the partition bar and the other end is connected to the inner side wall of the furnace body. Extension blocks are fixedly connected to the bottoms of both ends of the one-way sealing plate. The guiding slide bar passes through the extension blocks and the two are in sliding fit.

[0009] As a further aspect of the present invention, a furnace grate pipe is provided in the furnace body. The furnace grate pipe communicates with the water inlet pipe. The water outlet pipe communicates with the upper cavity through a connected transverse pipe. The cooling pipe communicates with the furnace grate pipe through a converging pipe.

[0010] A biomass gasifier further includes a furnace body and a furnace cylinder. A double furnace cylinder is provided in the furnace body. Feeding windows and feeding conduits are provided at the tops of the furnace cylinders. The feeding conduits are installed on the tops of the feeding windows. Closed hoppers and partition bars are provided at the bottoms of the furnace cylinders. Two groups of discharge windows are provided on both the front and rear sides of the furnace body. The closed hoppers correspond to the discharge windows one by one and are fixedly butted.

[0011] As a further aspect of the present invention, a first material valve and a second material valve are fixedly connected in the feeding conduit. The first material valve and the second material valve are arranged up and down.

[0012] As a further solution of the present invention, the bottom of the furnace barrel is in a lower circular arc shape, the grate is in an upper circular arc shape, and the one-way sealing plate is in a circular arc shape that fits against the bottom of the furnace barrel.

[0013] As a further solution of the present invention, one side of the grate close to each other is the water outlet pipe, and the other side of the grate far from each other is also the water outlet pipe. Cooling pipes are provided on the front and rear sides of both the upper cavity and the lower cavity, and return pipes are provided on the left and right sides of both the upper cavity and the lower cavity. Moreover, there are two groups of return pipes in the lower cavity, which are respectively located on both sides of the partition bar.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] Cooling and temperature control are directly carried out by filling the outer wall of the furnace barrel with coolant and filling the inside of the grate with coolant, which is relatively direct and effective, and has high efficiency.

[0016] The slag can be cooled through the closed hopper, thereby realizing dry cooling and slag discharge. The slag is easy to recycle and treat, and water use and water pollution are reduced.

[0017] The furnace body is provided with a double furnace barrel, and independent feeding structures and discharging structures are provided above and below each furnace barrel, so that the furnace barrels can be used alternately. When one furnace barrel is being filled with materials and prepared for gasification, the other can operate normally, thus there is no need to stop the machine and wait, and the gas production can be continuous, which is relatively efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall external structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the semi-sectional structure from the front side view of the present invention;

[0020] Figure 3 It is a schematic diagram of the semi-sectional structure from the left side view of the present invention;

[0021] Figure 4 It is a schematic diagram of the enlarged structure of part A of the present invention;

[0022] Figure 5 It is a schematic diagram of the semi-sectional structure from the top view of the present invention;

[0023] Figure 6 It is a schematic diagram of the semi-sectional structure in the middle from the front side view of the present invention;

[0024] Figure 7 It is a schematic diagram of the enlarged structure of part B of the present invention;

[0025] Figure 8 It is a schematic diagram of the semi-sectional structure from the bottom view of the present invention.

[0026] In the drawings, the list of components represented by each reference numeral is as follows:

[0027] 1. Furnace body; 2. Furnace drum; 3. Grate; 4. Slag window; 5. Upper sealing plate; 6. Lower sealing plate; 7. Upper cavity; 8. Dividing fence; 9. One-way sealing plate; 10. Closed hopper; 11. Closed door; 12. Lower cavity; 13. Hollow ring; 14. Connecting belt; 15. Middle plate; 16. Water inlet pipe; 17. Water outlet pipe; 18. Cooling pipe; 19. Reflux pipe; 20. Slag storage chamber; 21. Guide slide bar; 22. Window telescopic rod; 23. Extension block; 24. Junction pipe; 25. Feed window; 26. Feed duct; 27. First material valve; 28. Second material valve; 29. ​​Transverse pipe; 30. Grate pipe. DETAILED DESCRIPTION

[0028] See also Figure 1-8 , the present invention provides a technical solution:

[0029] Working principle: The circulating water system of the present invention can be used in both a single-drum gasifier and a double-drum gasifier, and the application principle is the same; here, taking the double-drum as an example, specifically, coolant is fed into the cooling pipes 18 and the grate pipes 30 of the upper cavity 7 and the lower cavity 12 respectively through the merging pipe 24, the coolant fed into the upper cavity 7 cools the outer wall of the furnace drum 2, and the coolant fed into the lower cavity 12 cools the slag, and the coolant is fed into the connecting belts 14 on both sides through the water inlet pipe 16 through the grate pipe 30, and then the coolant is fed into the cooling pipes 18 and the grate pipes 30 through the distribution of the connecting belts 14. The hollow ring 13 is used to cool the grate 3, and the cooling liquid after the grate 3 is cooled is sent into the upper cavity 7 through the transverse pipe 29, and then connected to the cooling liquid in the upper cavity 7 to flow out through the reflux pipe 20. The used cooling liquid in the lower cavity 12 flows out through its corresponding reflux pipe 20. The flowing cooling liquid can be connected to other external devices for heat recovery and utilization, and can also be connected to a filtering device to filter the used cooling liquid, etc. Cooling and temperature control are performed by directly filling the outer wall of the furnace barrel 2 and the inside of the grate 3 with cooling liquid, which is more direct and effective with higher efficiency.

[0030] Among them, the discharge part at the bottom of the furnace drum 2 is divided into two unconnected sides by the closed hopper 10 and the dividing fence 8. On one side during discharge, the one-way sealing plate 9 is sealed at the bottom of the slag window 4, and the closed door 11 is flipped up and opened, so that the stored slag can be discharged, and the bottom of the furnace drum 2 is closed from the outside during discharge, and there is no need to worry about leakage of gas, etc.; at this time, the one-way sealing plate 9 on the other side is located on the outside of the slag window 4 to open it, and the closed door 11 on the same side is in a closed state, so that the furnace drum 2 can discharge the slag normally, and it is temporarily stored in the slag storage cavity 20 formed by the closed hopper 10 and the bottom of the furnace drum 2, and the bottom of the closed hopper 10 is filled with coolant, which can cool the slag through the closed hopper 10, thereby realizing dry cooling slag discharge, and the slag is easy to recycle and process, and reduces water use and water pollution.

[0031] By extending and contracting the window-opening telescopic rod 22, the one-way sealing plate 9 can be pulled to move inwards to close the slag window 4 or outwards to open the slag window 4 under the guidance of the guiding slide rod 21, so as to realize the interval opening of the slag window 4 half by half, and realize the subsequent closed dry slag discharge. The structure is relatively simple, the cost is relatively low, and it can also be more suitable for use in harsh environments.

[0032] Water is simultaneously fed into the cooling pipe 18 and the grate pipe 30 through the converging pipe 24 on the front and rear sides of the upper cavity 7 and the lower cavity 12. At the same time, the return pipes 19 are provided on the left and right sides of the upper cavity 7 and the lower cavity 12, so that the coolant can flow out from the return pipe 19 after circulating half of the furnace barrel 2, which can accelerate the circulation speed, and then accelerate the cooling temperature control, which is relatively efficient. The grate pipe 30 supplies coolant to the grates 3 on both sides through the water inlet pipe 16, and circulates and cools the hollow ring 13 through the connecting belt 14 in the water flow direction shown in Figure 5 Therein, so that the coolant has a unified circulation direction, enabling the coolant to enter and discharge in time, thereby improving the temperature control speed.

[0033] The furnace body is provided with double furnace barrels, and independent feeding structures and discharging structures are provided above and below each furnace barrel 2, so that the furnace barrels 2 can be used at intervals. When one furnace barrel 2 is being filled and gasified, the other can operate normally, so there is no need to stop the machine and wait, and the gas production can be continuous, which is relatively efficient. The upper circular grate 3 is conducive to the falling and aggregation of slag, and the furnace barrel 2 with a lower circular bottom is relatively easy to discharge slag.

Claims

1. A biomass gasification furnace circulating water system, comprising a furnace body (1), a furnace drum (2) and a grate (3), wherein a slag window (4) is provided at the bottom of the furnace drum (2), and characterized in that: An upper sealing plate (5) and a lower sealing plate (6) are fixedly connected between the side wall of the furnace barrel (2) and the furnace body (1); the space between the outer wall of the furnace barrel (2) and the upper sealing plate (5) and the lower sealing plate (6) is an upper cavity (7); a partition fence (8) is fixedly connected between the bottom of the furnace body (1) and the furnace barrel (2); the partition fence (8) is located in the middle of the slag window (4); a one-way sealing plate (9) is provided at the bottom of the furnace barrel (2); the one-way sealing plate (9) is located on both sides of the partition fence (8) and is used to close half of the slag window (4); a closed hopper (10) is fixedly connected to the bottom of the furnace barrel (2); and the front and rear ends of the furnace body (1) are both provided with A discharge window is provided, the upper end of which is rotatably connected to a closed door (11); the space between the partition fence (8) and the lower part of the closed hopper (10) and the top of the furnace body (1) is a lower cavity (12); the grate (3) comprises a plurality of hollow circular rings (13) and a connecting belt (14); a middle plate (15) is provided in the middle of the connecting belt (14); the middle of the connecting belt (14) is connected to the middle of the hollow circular ring (13); a water inlet pipe (16) and a water outlet pipe (17) are provided on symmetrical sides of the grate (3); and a cooling pipe (18) and a reflux pipe (19) are connected to the outside of the upper cavity (7) and the lower cavity (12).

2. A biomass gasifier circulating water system according to claim 1, characterized in that: The space between the closed hopper (10) and the bottom of the furnace drum (2) is a slag storage chamber (20), and a guide slide bar (21) and a window-opening telescopic rod (22) are installed in the slag storage chamber (20). The one-way sealing plate (9) is closely arranged on the bottom of the furnace drum (2) through the guide slide bar (21), and the window-opening telescopic rod (22) is used to pull the one-way sealing plate (9) to move outward and open the slag window (4).

3. A biomass gasifier circulating water system according to claim 2, characterized in that: One end of the window opening telescopic rod (22) is rotatably connected to the inner wall of the furnace body (1), and the other end is rotatably connected to the side wall of the one-way sealing plate (9). The guide slide bar (21) matches the shape of the bottom of the furnace barrel (2) and one end is fixedly connected to the side wall of the partition fence (8), and the other end is connected to the inner wall of the furnace body (1). The bottom of both ends of the one-way sealing plate (9) is fixedly connected to an extension block (23), and the guide slide bar (21) passes through the extension block (23) and the two are slidably matched.

4. A biomass gasifier circulating water system according to claim 1, characterized in that: A grate pipe (30) is provided in the furnace body (1), the grate pipe (30) is connected to a water inlet pipe (16), the water outlet pipe (17) is connected to the upper cavity (7) via a connected transverse pipe (29), and the cooling pipe (18) is connected to the grate pipe (30) via a merging pipe (24).

5. A biomass gasification furnace, comprising the circulating water system according to any one of claims 1 to 4, and further comprising a furnace body (1) and a furnace drum (2), characterized in that: The furnace body (1) is provided with a double furnace drum (2), the top of each furnace drum (2) is provided with a feed window (25) and a feed conduit (26), the feed conduit (26) is installed on the top of the feed window (25), the bottom of each furnace drum (2) is provided with a closed hopper (10) and a partition fence (8), and the front and rear sides of the furnace body (1) are provided with two sets of discharge windows, the closed hopper (10) corresponds to the discharge window one by one and is fixedly connected.

6. The biomass gasifier according to claim 5, characterized in that: A first material valve (27) and a second material valve (28) are fixedly connected inside the feed conduit (26), and the first material valve (27) and the second material valve (28) are arranged one above the other.

7. The biomass gasifier according to claim 5, characterized in that: The bottom of the furnace drum (2) is in the shape of a lower circular arc, the grate (3) is in the shape of an upper circular arc, and the one-way sealing plate (9) is in the shape of a circular arc that is in contact with the bottom of the furnace drum (2).

8. The biomass gasifier according to claim 5, characterized in that: The side close to the grate (3) is a water outlet pipe (17), and the side away from the grate (3) is a water outlet pipe (17). The front and rear sides of the upper cavity (7) and the lower cavity (12) are both provided with cooling pipes (18). The left and right sides of the upper cavity (7) and the lower cavity (12) are both provided with return pipes (19), and the return pipes (19) of the lower cavity (12) are provided with two groups, which are respectively located on both sides of the partition fence (8).

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