CN220563785U

CN220563785U - Air-supplementing regulator

Info

Publication number: CN220563785U
Application number: CN202322063408.0U
Authority: CN
Inventors: 徐倩霏; 徐利; 吕纪永; 武建荣; 邢峰; 苏存平; 艾志明; 丁传伟
Original assignee: Changshu Longteng Special Steel Co Ltd
Current assignee: Changshu Longteng Special Steel Co Ltd
Priority date: 2023-08-02
Filing date: 2023-08-02
Publication date: 2024-03-08
Anticipated expiration: 2033-08-02

Abstract

The utility model discloses an air supplementing regulator, which comprises an air-coal mixing chamber, a coal powder pipe and an air supplementing pipe, wherein the air supplementing pipe is communicated with the air-coal mixing chamber, one end of the coal powder pipe extends to the inner side of the air-coal mixing chamber, a gap is reserved between the end part of the coal powder pipe and the inner wall of the air-coal mixing chamber, an air supplementing cavity is formed between the outer wall of the coal powder pipe and the inner wall of the air-coal mixing chamber, a porous plate is transversely arranged at an inlet between the air supplementing cavity and the air-coal mixing chamber, and a plurality of guide holes for air flow to pass through are formed in the porous plate. The utility model has the advantages of simple structure, strong practicability and the like, the air in the air supplementing cavity can be ejected at high speed through the ejection holes on the porous plate through the added porous plate, the ejection effect is achieved, the high-speed ejected air flow can impact the pulverized coal, the turbulence phenomenon is generated, the air and the pulverized coal are more uniformly mixed, and meanwhile, the porous plate can also play a role of throttling.

Description

Air-supplementing regulator

Technical Field

The utility model relates to the technical field of pulverized coal conveying processes, in particular to an air supplementing regulator.

Background

In the powder pneumatic conveying process, in order to reduce the gas consumption, reduce the pipeline resistance loss and prolong the service life of the pipeline, a concentrated phase conveying technology is commonly adopted at home and abroad, and a gas supplementing regulator is key equipment of the concentrated phase conveying technology. The circular seam type air compensator which is most applied and has better effect at present has the structure and principle that: the high-concentration powder and gas which are output after fluidization by the fluidizer respectively enter from the inlet, the gas which enters the gas chamber is ejected along the circumferential seam, the high-speed gas and the powder are mixed, and a solid-gas two-phase flow with uniform and stable certain concentration is formed and flows out from the outlet to set device equipment.

In the pulverized coal conveying process, the existing circular seam type air supplementing device has the following defects: the pulverized coal and gas mixing effect is not ideal, the requirement on the air inlet pressure of the gas is higher, if the air inlet pressure is smaller, the spraying speed of the gas sprayed out along the circumferential seam is insufficient, so that the gas and the pulverized coal are not uniformly mixed, and the circumferential seam type air compensator can cause certain gas waste and can not meet the use requirement.

The Chinese patent with the application number of CN201120136383.7 discloses an adjustable high-efficiency air supplementing regulator which comprises an air-coal mixing chamber, a coal powder pipe, a guide cylinder, an adjusting round nut, a sealing zero-order, a coal powder feeding pipe and an air supplementing pipe component; the gas-coal mixing chamber consists of an air inlet rotary cylinder, a cone mixing chamber and a gas-coal mixing outflow port flange; the pulverized coal pipe is provided with a guide key and a thread for adjusting the pulverized coal pipe; the guide cylinder is provided with a guide key groove; the sealing zero joint is used for sealing a gap between the powder inlet pipe and the coal powder pipe; the air supplementing pipe component is formed by welding an air supplementing pipe and an air supplementing flange, and an air supplementing pipe end is welded on the air inlet rotary cylinder. The air-supplementing regulator is a circular seam type air-supplementing regulator, which can regulate the size of the circular seam, but the structure is increased to regulate the size of the circular seam, so that the complexity of the air-supplementing regulator structure is increased, the cost of the air-supplementing regulator is further increased, the injected air is not in an injection shape, and the uniformity of air-coal mixing is not ideal.

Disclosure of Invention

The utility model aims to solve the problems, designs a gas supplementing regulator, and solves the problems that the gas is not uniform enough when mixed with coal powder due to insufficient gas flow rate when the gas is mixed with coal powder.

The technical scheme of achieving the aim is that the air supplementing regulator comprises an air-coal mixing chamber, a coal powder pipe and an air supplementing pipe, wherein the air supplementing pipe is communicated with the air-coal mixing chamber, one end of the coal powder pipe extends to the inner side of the air-coal mixing chamber, a gap is reserved between the end part of the coal powder pipe and the inner wall of the air-coal mixing chamber, an air supplementing cavity is formed between the outer wall of the coal powder pipe and the inner wall of the air-coal mixing chamber, a porous plate is transversely arranged at an inlet between the air supplementing cavity and the air-coal mixing chamber, and a plurality of guide holes for air flow to pass through are formed in the porous plate.

Preferably, the plurality of injection holes are uniformly distributed along the circumferential direction of the porous plate.

Preferably, one or more than one circle of the guiding holes are arranged in the circumferential direction of the porous plate.

Preferably, the gas-coal mixing chamber comprises a mixing cylinder and a guide cylinder connected with the mixing cylinder, wherein the inlet of the guide cylinder is conical, and the front end of the coal powder pipe extends to the position of the guide cylinder and is in clearance fit with the conical surface at the inner side of the inlet of the guide cylinder.

Preferably, the inlet of the air supplementing pipe is provided with an air supplementing flange, the powder inlet of the pulverized coal pipe is provided with an inlet flange, and the outlet of the guide cylinder is provided with an outlet flange.

Preferably, the inner diameter of the pulverized coal pipe is consistent with the inner diameter of the guide cylinder outlet.

Compared with the prior art, the beneficial effects are that:

the utility model has the advantages of simple structure, strong practicability and the like, the air in the air supplementing cavity can be pressurized by adding the porous plate at the outlet of the air supplementing cavity, namely the circumferential seam, and meanwhile, the porous plate is provided with the plurality of injection holes, the air in the air supplementing cavity can be ejected at high speed through the injection holes to perform the injection function, and the air flow ejected at high speed can impact the pulverized coal to generate turbulent flow phenomenon, so that the air and the pulverized coal are mixed more uniformly, and meanwhile, the porous plate can also perform the throttling function.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

FIG. 2 is a schematic diagram of the structure of the single circle of injection holes on the porous plate in the utility model;

FIG. 3 is a schematic view of the structure of the double circles of injection holes in the perforated plate according to the present utility model.

In the figure, 1, a pulverized coal pipe; 2. a gas-coal mixing chamber; 21. a mixing drum; 22. a guide cylinder; 201. a supplementing cavity; 3. a porous plate; 31. an introduction hole; 4. an air supplementing pipe; 5. an air supplementing flange; 6. an inlet flange; 7. and an outlet flange.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, the air make-up regulator mainly comprises a gas-coal mixing chamber 2, a coal powder pipe 1, an air make-up pipe 4, a porous plate 3 and other components, wherein the gas-coal mixing chamber 2 consists of a mixing cylinder 21 and a guiding cylinder 22, the guiding cylinder 22 is connected with the tail end of the mixing cylinder 21 to form a semi-closed cavity together, the air make-up pipe 4 is inserted from one end of the mixing cylinder 21 and extends to the position of the guiding cylinder 22, the inlet side of the guiding cylinder 22 is conical, the inner side surface of the guiding cylinder is conical, a gap is reserved between the outlet end of the coal powder pipe and the conical surface, the gap is a circular seam, and gas is sprayed from the circular seam to be mixed with the coal powder.

Referring to fig. 1 and 2, a gas supplementing chamber 201 of an annular chamber structure is formed between an outer wall of the pulverized coal pipe and an inner wall of the mixing drum 21, the gas supplementing pipe 4 is connected to the mixing drum 21 and communicates with the gas supplementing chamber 201, and air enters the gas supplementing chamber 201 from the gas supplementing pipe 4. The perforated plate 3 is transversely arranged at the air outlet of the mixing drum 21, namely, the position of a circular seam between the outlet end of the pulverized coal pipe and the guide drum 22, a plurality of evenly distributed injection holes 31 are arranged along the circumferential direction of the perforated plate 3, and gas is sprayed out of the injection holes 31.

The porous plate 3 has three functions, namely, when the air pressure supplied by the air supplementing pipe 4 is insufficient, the porous plate 3 can have the function of pressurizing the air in the air supplementing cavity 201; secondly, air in the air supplementing cavity 201 can be ejected at a high speed when passing through the ejection holes 31 on the porous plate 3, so that the ejection effect is achieved, and the ejected jet flow at a high speed can impact the pulverized coal from the pulverized coal pipe to generate a turbulence phenomenon, so that the mixing is more uniform; thirdly, can play the effect of throttle.

Referring to fig. 2 and 3, the injection holes 31 on the porous plate 3 may be provided with only one turn or more than one turn, and if more than one turn is provided, the aperture is relatively small, so that the pressurizing effect is better, the speed of air jet is faster, and the air jet speed is enhanced by providing the porous plate 3 without adjusting the gap between the pulverized coal pipe and the guide cylinder 22, so that the throttling effect is better. Through the plurality of the injection holes 31, the gas passing through the porous plate 3 is columnar, and a plurality of columnar airflows impact the pulverized coal together, so that the pulverized coal can be more dispersed, and the uniformity of the mixing of the pulverized coal and the gas can be improved.

The whole shape of the porous plate 3 is conical, the shape of the porous plate is matched with the shape of a gap between the pulverized coal pipe 1 and the guide cylinder 22, the gradient of the injection hole 31 on the porous plate 3 is also matched with the taper of the conical surface on the guide cylinder 22, and thus gas can be directly injected to the outlet of the pulverized coal pipe 1 along the straight line of the injection hole 31, and the injection effect is enhanced.

Referring to fig. 1, the guide cylinder 22 is also provided with a through passage, and the inner diameter of the pulverized coal pipe is consistent with the inner diameter of the outlet of the guide cylinder 22, so that the pulverized coal can be linearly sprayed into the passage of the guide cylinder 22 through the pulverized coal pipe, and is sprayed out from the outlet after being uniformly mixed with air.

The inlet of the air supplementing pipe 4 is provided with an air supplementing flange 5, the air inlet flange 5 is connected with an air inlet pipeline through bolts, an adjusting valve is arranged on the air inlet pipeline, control gas enters the air supplementing regulator, the powder inlet of the pulverized coal pipe is provided with an inlet flange 6, the inlet flange 6 is connected with the pulverized coal pipe 1 pipeline through bolts, the outlet of the guide cylinder 22 is provided with an outlet flange 7, and the outlet flange 7 is connected with a discharging pipeline through bolts, so that the installation of the air supplementing regulator can be realized.

The air supplementing regulator is arranged on a coal powder main pipe at an outlet of the blowing tank and is used for diluting high-concentration coal powder from the blowing tank in the pneumatic conveying process of the coal powder, so that solid and gas are fully and uniformly mixed, and the coal powder and the gas form a stable concentrated solid-gas two-phase flow. The pressurized gas in the air supplementing cavity 201 can form high-speed injection-shaped air flow through the injection holes 31 on the porous plate 3, impact with pulverized coal and generate turbulence phenomenon, so that the gas and the pulverized coal are uniformly mixed, and the production requirement is met.

Compared with the existing circular seam type air-supplementing device, the circular seam type air-supplementing device has the advantages that the porous plate 3 is arranged, the throttling effect can be achieved, the uniform mixing of gas and coal can be achieved without adjusting the size of the circular seam, the gas and coal are more uniform, compared with the prior art, the circular seam type air-supplementing device is simpler in structure and lower in manufacturing cost, and therefore the circular seam type air-supplementing device has certain market popularization value.

The above technical solution only represents the preferred technical solution of the present utility model, and some changes that may be made by those skilled in the art to some parts of the technical solution represent the principles of the present utility model, and the technical solution falls within the scope of the present utility model.

Claims

1. The utility model provides an air make-up regulator, includes gas-coal mixing chamber (2), buggy pipe (1), air make-up pipe (4) with gas-coal mixing chamber (2) intercommunication, the one end of buggy pipe (1) extends to the inboard of gas-coal mixing chamber (2), and leave the gap between the tip of buggy pipe (1) and the inner wall of gas-coal mixing chamber (2), the outer wall of buggy pipe (1) with be formed with air make-up chamber (201) between the inner wall of gas-coal mixing chamber (2), a serial communication port, air make-up chamber (201) with transversal perforated plate (3) of being provided with of entrance between gas-coal mixing chamber (2), be provided with injection hole (31) that a plurality of air supplies the air current to pass through on perforated plate (3).

2. A make-up air conditioner as claimed in claim 1, wherein a plurality of said ejector holes (31) are uniformly distributed along the circumferential direction of said perforated plate (3).

3. A regulator according to claim 2, characterized in that the perforated plate (3) is provided with one or more rings of injection holes (31) in the circumferential direction.

4. A make-up air regulator as claimed in claim 1, wherein the air-coal mixing chamber (2) comprises a mixing drum (21) and a guide drum (22) connected with the mixing drum (21), the inlet of the guide drum (22) is conical, and the front end of the pulverized coal pipe (1) extends to the position of the guide drum (22) and is in clearance fit with the conical surface inside the inlet of the guide drum (22).

5. A make-up air regulator as defined in claim 4, wherein the inlet of the make-up air pipe (4) is provided with a make-up air flange (5), the powder inlet of the pulverized coal pipe (1) is provided with an inlet flange (6), and the outlet of the guide cylinder (22) is provided with an outlet flange (7).

6. A make-up air regulator as claimed in claim 4, wherein the inner diameter of said pulverized coal pipe (1) corresponds to the inner diameter of the outlet of said guide cylinder (22).