Gas purification device for removing dust and tar in biomass gasifier

Abstract

The utility model belongs to the technical field of gas purification, and particularly relates to a gas purification device for removing dust and tar in a biomass gasifier, which comprises a box body filled with water, a partition plate vertically arranged in the box body and a stirring motor arranged at the bottom of the box body, a gas inlet and a gas outlet are respectively formed in the upper part of the side wall of the inner wall of the box body and are separated by a partition plate, and a tar discharge port is formed in the bottom of the box body; a pressure release valve is arranged at the top of the box body, the inner wall of the box body is cylindrical, and the top end, the left side and the right side of the partition plate are in sealed connection with the top and the inner wall of the box body respectively. According to the utility model, the purification effect of fuel gas can be obviously improved, and compared with the existing square purifier, the structure is easier to manufacture, the dead angles are fewer, and the condition that tar is difficult to clean due to adhesion after being condensed is not easy to cause.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel gas purification, in particular to a gas purification device used for removing dust and tar from a biomass gasification furnace. Background Art

[0002] The raw materials for the biomass gasifier to produce gas are crop straw, forest waste, etc. This gas is a green new energy source with strong vitality, and has the characteristics of renewability, low pollution and wide distribution. Using biomass as an alternative energy source is of great significance for low-carbon emission reduction, reducing the "greenhouse effect" and improving the atmospheric acid rain environment. The biomass gasification system uses biomass to burn in a closed oxygen-deficient gasifier, and produces combustible gas through dry distillation, pyrolysis and thermochemical oxidation.

[0003] Chinese patent number CN107746728B discloses a process for preparing fuel gas in a biomass fixed bed gasifier, which can completely remove tar, increase the service life of equipment without reducing output efficiency, and cause no pollution to the environment.

[0004] However, current purification devices mainly use square boxes. Although they are easy to carry and have higher space utilization, they are prone to dead corners. When the stirring motor stirs the water in the box, the water in the dead corners is not easy to flow, which further easily leads to tar accumulation and adhesion, making it very difficult for maintenance personnel to clean up.

[0005] Based on the above situation, the present application proposes a gas purification device with fewer dead corners for removing dust and tar from a biomass gasification furnace. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a gas purification device for removing dust and tar from a biomass gasifier, which solves the problem that the existing square purifier has many dead corners and easily causes adhesion after tar condensation, making it difficult to clean.

[0007] To achieve the above purpose, the utility model provides the following technical solution: a gas purification device for removing dust and tar from a biomass gasifier, comprising:

[0008] A box body, wherein an air inlet and an air outlet are respectively provided at the upper part of the inner wall and the side wall of the box body;

[0009] A partition is vertically arranged in the box, and the air inlet and the air outlet are separated by the partition;

[0010] A stirring motor is arranged at the bottom of the box;

[0011] The box contains water, a tar discharge port is provided at the bottom of the box, a pressure relief valve is provided at the top of the box, the inner wall of the box is cylindrical, and the top and left and right sides of the partition are sealed and connected to the top and inner wall of the box respectively.

[0012] Preferably, the pressure relief valve is arranged on one side of the top of the box body close to the air inlet.

[0013] Preferably, the partition includes a plurality of partition plates distributed in a ring shape in the box body, each of the partition plates is connected together on one side away from the inner wall of the box body, and the partition plates include an upper opening plate and a lower opening plate, and the bottom height of the upper opening plate is lower than the bottom height of the lower opening plate.

[0014] Preferably, the air inlet and the air outlet are symmetrically distributed about the center line of the box body, and the air inlet and the air outlet are both arranged within a range surrounded by two adjacent identical dividing panels on the inner wall of the box body.

[0015] Preferably, the upper opening plate and the lower opening plate are staggered, and the sub-plate further includes at least one limiting plate without an opening, the bottom height of the limiting plate is aligned with the bottom height of the lower opening plate, and the air inlet and the air outlet are separated by the limiting plate.

[0016] Preferably, a jacket is provided at the lower portion of the outer wall of the box body, and hot water is contained in the jacket.

[0017] Preferably, it further comprises a circulation unit, which comprises a circulation pump and a water inlet pipe and a water outlet pipe which are connected to both sides of the jacket, and the circulation pump is connected to the water inlet pipe.

[0018] Preferably, the circulation unit further comprises a heating unit, a temperature sensor is provided in the jacket, and the heating unit is controllably connected to the temperature sensor via a control module.

[0019] Preferably, the heating unit comprises:

[0020] A heating box, wherein the circulating pump is arranged in the heating box, and the water outlet pipe is connected to the heating box;

[0021] A heating module is disposed in the heating box and is connected to the control module.

[0022] Preferably, an emergency discharge port is provided at the bottom of the box body, and valves are provided in the emergency discharge port and the tar discharge port.

[0023] Compared with the prior art, the utility model provides a gas purification device for removing dust and tar from a biomass gasifier, which has the following beneficial effects:

[0024] The gas purification device for removing dust and tar from a biomass gasifier can significantly improve the purification effect of fuel gas, and is structurally easier to manufacture than existing square purifiers, and has fewer dead corners, making it less likely for tar to condense and stick together, making it difficult to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the gas purification device for removing dust and tar in a biomass gasification furnace;

[0026] Figure 2 is a schematic diagram of the structure of the partition;

[0027] Figure 3 is a schematic structural diagram of another embodiment of a partition;

[0028] Figure 4 It is a structural schematic diagram of the circulation unit;

[0029] Figure 5 This is the control flow chart of the heating unit.

[0030] In the figure: 1. box body; 11. air inlet; 12. air outlet; 13. tar discharge port; 14. emergency discharge port; 15. valve; 2. partition; 21. dividing plate; 211. upper opening plate; 212. lower opening plate; 213. limiting plate; 3. stirring motor; 4. pressure relief valve; 5. jacket; 6. circulation unit; 61. circulation pump; 62. water inlet pipe; 63. water outlet pipe; 64. heating unit; 641. heating box; 642. heating module; 65. temperature sensor; 66. control module. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Embodiment 1:

[0033] See also Figure 1The utility model provides the following technical solutions: a gas purification device for removing dust and tar from a biomass gasifier, comprising a box body 1 filled with water, a partition 2 vertically arranged in the box body 1 and a stirring motor 3 at the bottom of the box body 1; an air inlet 11 and an air outlet 12 are respectively provided at the upper part of the inner wall side wall of the box body 1, the air inlet 11 and the air outlet 12 are separated by the partition 2, and a tar discharge port 13 is provided at the bottom of the box body 1; a pressure relief valve 4 is provided at the top of the box body 1, the inner wall of the box body 1 is cylindrical, and the top and left and right sides of the partition 2 are respectively sealed and connected to the top and inner wall of the box body 1.

[0034] As an optional implementation scheme of the utility model, the gas enters the box body 1 from the air inlet 11. Due to the obstruction of the partition 2 and the continuous output of the gas, the gas can only flow to the lower part of the partition 2, thereby coming into contact with the water in the box body 1. At this time, the dust carried in the gas is dissolved in the water, and the tar is cooled by the water to solidify and fall into the water, thereby completing the purification of the gas. The purified gas flows directly from the empty space between the bottom of the partition 2 and the water surface to the other side of the partition 2, and flows out of the box body 1 through the air outlet 12, thereby being collected by an external collection device.

[0035] When tar accumulates more and more in the water, the water level in the box 1 rises. The tar discharge port 13 can be connected to the gasifier through a pipeline, so that the tar can be discharged to the gasifier for recycling. The lowering of the water level in the box 1 ensures that the gas will not be unable to pass through the purification device.

[0036] Among them, the box body 1 with a cylindrical inner wall is easier to manufacture than the traditional square purifier, with fewer dead corners, and is not easy to cause tar adhesion and difficult to clean. In addition, for the stirring of the stirring motor 3, the stirring effect at each position in the water is also more uniform, which can improve the purification effect of the gas, and the tar is less likely to accumulate after condensation. The pressure relief valve 4 adopts the existing mechanical pressure relief safety valve with the effect of sealing gas and releasing pressure in the market. It can automatically open when the gas output efficiency in the gas furnace increases dramatically, avoiding the accumulation of gas in the box body 1 or the excessive flow rate leading to incomplete purification, and preventing the quality of the already purified gas from being affected.

[0037] The above structure can significantly improve the purification effect of gas, and is structurally easier to manufacture than the existing square purifier, and has fewer dead corners, making it less likely for tar to condense and stick together, making it difficult to clean.

[0038] like Figure 1 As shown, the pressure relief valve 4 is arranged on one side of the top of the box body 1 close to the air inlet 11.

[0039] As an optional implementation scheme of the utility model, unpurified fuel gas can be discharged in time.

[0040] like Figure 1As shown, a jacket 5 is provided at the lower part of the outer wall of the box body 1, and hot water is contained in the jacket 5.

[0041] As an optional implementation scheme of the present invention, the temperature of the water in the box body 1 is maintained by the jacket 5, which not only ensures that the water in the box body 1 has sufficient purification efficiency, that is, the solubility of dust and the temperature for cooling and settling tar, but also prevents the tar from sticking to the inner wall of the box body 1 due to excessive temperature drop, resulting in blockage of the tar discharge port 13.

[0042] like Figure 4 As shown, a circulation unit 6 is also included. The circulation unit 6 includes a circulation pump 61 and a water inlet pipe 62 and a water outlet pipe 63 which are connected to both sides of the jacket 5 . The circulation pump 61 is connected to the water inlet pipe 62 .

[0043] As an optional implementation scheme of the present invention, the circulation unit 6 can circulate the water in the jacket 5, so as to maintain the temperature of the jacket 5, thereby ensuring that the function of the jacket 5 itself is effective.

[0044] like Figure 4-5 As shown, the circulation unit 6 also includes a heating unit 64. A temperature sensor 65 is provided in the jacket 5. The heating unit 64 is controlled and connected to the temperature sensor 65 through a control module 66. The heating unit 64 includes:

[0045] A heating box 641, a circulating pump 61 is disposed in the heating box 641, and a water outlet pipe 63 is connected to the heating box 641;

[0046] The heating module 642 is disposed in the heating box 641 , and the heating module 642 is connected to the control module 66 .

[0047] As an optional implementation scheme of the utility model, the water in the jacket 5 enters the heating box 641 through the outlet pipe 63, and is introduced into the inlet pipe 62 through the circulating pump 61, and then returns to the jacket 5 to complete the circulation; wherein the temperature sensor 65 detects the temperature of the water in the jacket 5 in real time, and triggers an electrical signal when it detects that the water temperature of the jacket 5 is too low, and the control module 66 controls the heating module 642 to heat the water in the heating box 641, ensuring that the water in the jacket 5 has sufficient temperature to ensure that the temperature of the tar does not drop too low, thereby ensuring that the tar does not adhere to the inner wall of the box body 1 and cause the tar discharge port 13 to be blocked.

[0048] Among them, the heating module 642 is an existing technology, and can adopt the existing heating rods, ceramic heating plates and other technical means on the market, which will not be elaborated here.

[0049] like Figure 1 As shown, an emergency discharge port 14 is provided at the bottom of the box body 1 , and valves 15 are provided in the emergency discharge port 14 and the tar discharge port 13 .

[0050] As an optional implementation scheme of the utility model, when tar needs to be discharged, the emergency discharge port 14 or the tar discharge port 13 can be opened through the valve 15 to discharge the tar. When the water level in the box 1 is too high, the emergency discharge port 14 can be opened first to return the water level to a normal value.

[0051] like Figure 2-3 As shown, the partition 2 includes a plurality of partition plates 21 distributed in a ring shape in the box body 1, and each partition plate 21 is connected together at one side away from the inner wall of the box body 1. The partition plates 21 include an upper opening plate 211 and a lower opening plate 212, and the bottom height of the upper opening plate 211 is lower than the bottom height of the lower opening plate 212.

[0052] As an optional implementation scheme of the utility model, the box body 1 is divided into multiple purification spaces by a partition plate 21, so that the gas passes through the water surface multiple times for multiple purification, thereby avoiding the gas flowing out before purification is completed due to unstable gas output flow rate. Therefore, the design of the partition plate 21 allows the gas to pass through a larger area of ​​the water surface in the box body 1, so that the purification effect of the gas can be further guaranteed.

[0053] like Figure 3 As shown, the air inlet 11 and the air outlet 12 are symmetrically distributed about the center line of the box body 1 , and the air inlet 11 and the air outlet 12 are both arranged within a range surrounded by two adjacent identical dividing plates 21 on the inner wall of the box body 1 .

[0054] As an optional implementation scheme of the utility model, the gas enters the space surrounded by the partition plate 21 through the air inlet 11. The above two identical partition plates 21 preferably adopt a lower end opening plate 212, which can divide the box body 1 into two flow channels. After the gas enters the box body 1, it first flows directly downward, and flows from the lower ends of the two lower end opening plates 212 to the two flow channels for purification, and finally flows out through the two lower end opening plates 212 to the space where the gas outlet 12 is located, and is gathered. This structure is suitable for use in a box body 1 with a larger volume, which can not only meet the purification effect but also reasonably utilize the space, and can process more gas in a short time.

[0055] Embodiment 2:

[0056] like Figure 2 As shown, the upper opening plate 211 and the lower opening plate 212 are staggered, and the dividing plate 21 also includes at least one limiting plate 213 without an opening, the bottom height of the limiting plate 213 is aligned with the bottom height of the lower opening plate 212, and the air inlet 11 and the air outlet 12 are separated by the limiting plate 213.

[0057] As an optional implementation scheme of the utility model, an annular flow channel can be formed, so that the gas flows in through the air inlet 11 and then circulates up and down in a circular direction, and finally flows out through the air outlet 12 next to the air inlet 11. This structure is more suitable for a box body 1 with a small volume that cannot accommodate too many partitions 21, and can ensure the purification effect in a slightly smaller space.

[0058] The working principle and use process of the utility model are as follows: the gas enters the box body 1 from the air inlet 11. Due to the obstruction of the partition 2 and the continuous output of the gas, the gas can only flow to the lower part of the partition 2, thereby contacting the water in the box body 1. At this time, the dust carried in the gas is dissolved in the water, and the tar is cooled by the water to solidify and fall into the water, thereby completing the purification of the gas. The purified gas directly flows from the empty space between the bottom of the partition 2 and the water surface to the other side of the partition 2, and flows out of the box body 1 through the air outlet 12, thereby being collected by an external collection device.

[0059] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A gas purification device for removing dust and tar from a biomass gasifier, characterized in that: include: A box body, wherein an air inlet and an air outlet are respectively provided at the upper part of the inner wall and the side wall of the box body; A partition is vertically arranged in the box body, and the air inlet and the air outlet are separated by the partition; A stirring motor is arranged at the bottom of the box; The box contains water, a tar discharge port is provided at the bottom of the box, a pressure relief valve is provided at the top of the box, the inner wall of the box is cylindrical, and the top and left and right sides of the partition are sealed and connected to the top and inner wall of the box respectively.

2. A gas purification device for removing dust and tar from a biomass gasifier according to claim 1, characterized in that: The pressure relief valve is arranged on one side of the top of the box body close to the air inlet.

3. A gas purification device for removing dust and tar from a biomass gasifier according to claim 1, characterized in that: The partition includes a plurality of partition plates distributed in a ring shape in the box body, each of the partition plates is connected together at one side away from the inner wall of the box body, and the partition plates include an upper opening plate and a lower opening plate, and the bottom height of the upper opening plate is lower than the bottom height of the lower opening plate.

4. A gas purification device for removing dust and tar from a biomass gasifier according to claim 3, characterized in that: The air inlet and the air outlet are symmetrically distributed about the center line of the box body, and the air inlet and the air outlet are both arranged within a range surrounded by two adjacent identical dividing plates on the inner wall of the box body.

5. The gas purification device for removing dust and tar from a biomass gasifier according to claim 3, characterized in that: The upper opening plate and the lower opening plate are staggered, and the sub-plate further includes at least one limiting plate without an opening, the bottom height of the limiting plate is aligned with the bottom height of the lower opening plate, and the air inlet and the air outlet are separated by the limiting plate.

6. A gas purification device for removing dust and tar from a biomass gasifier according to claim 1, characterized in that: A jacket is provided at the lower part of the outer wall of the box body, and hot water is contained in the jacket.

7. A gas purification device for removing dust and tar from a biomass gasifier according to claim 6, characterized in that: It also includes a circulation unit, which includes a circulation pump and a water inlet pipe and a water outlet pipe which are connected to both sides of the jacket, and the circulation pump is connected to the water inlet pipe.

8. A gas purification device for removing dust and tar from a biomass gasifier according to claim 7, characterized in that: The circulation unit further comprises a heating unit. A temperature sensor is arranged in the jacket. The heating unit is controllably connected to the temperature sensor via a control module.

9. A gas purification device for removing dust and tar from a biomass gasifier according to claim 8, characterized in that: The heating unit comprises: A heating box, wherein the circulating pump is arranged in the heating box, and the water outlet pipe is connected to the heating box; A heating module is disposed in the heating box and is connected to the control module.

10. The gas purification device for removing dust and tar from a biomass gasifier according to claim 1, characterized in that: An emergency discharge port is arranged at the bottom of the box body, and valves are arranged in the emergency discharge port and the tar discharge port.

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