Anti-blocking air supply device for pneumatic ash conveying pipe

Abstract

The utility model discloses a pneumatic ash conveying pipe anti-blocking air supply device which comprises an ash conveying pipe, a plurality of air supply branch pipes are evenly arranged on the ash conveying pipe at intervals, the air supply branch pipes are obliquely connected with the ash conveying pipe through sealing sleeves, the included angle between each air supply branch pipe and the ash conveying pipe is 35-45 degrees, check valves are arranged at the top ends of the air supply branch pipes, and the air supply branch pipes are connected with the ash conveying pipe through sealing sleeves. The top end of the check valve is connected with an air supply connecting pipe, and the top end of the air supply connecting pipe is connected with an air supply conveying pipe through a pressure regulating valve. According to the anti-blocking air supply device, the air supply branch pipe is additionally arranged on the ash conveying pipe in an inclined mode, inclined air inlet can enable accumulated ash in the ash conveying pipe to be disturbed, bottom accumulated ash wrapping conveying is achieved, pipeline blocking is effectively avoided, the ash loading amount of a bin pump is greatly increased, conveying efficiency is high, conveying is stable, meanwhile, the conveying pressure of the ash conveying pipe is reduced, and then air pressure consumption is greatly reduced; in addition, gas conveying leakage is effectively avoided, and conveying stability is further guaranteed.

Description

Technical Field

[0001] The utility model relates to an electrostatic dust removal and ash conveying system, in particular to an anti-blocking and air-supplementing device for a pneumatic ash conveying pipe. Background Art

[0002] Pneumatic ash conveying pipes transport dry ash from electrostatically precipitated boiler flue gas to the ash silo. Due to the constant change in coal consumption and the increasing ash content, coal feed rates have been continuously increased to maintain calorific value, leading to increasing pressure on the pneumatic conveying system. After years of operation, the fluidization device in the pneumatic ash conveying system has become worn out, and the inner casing of the double-cased pipe between the pumps has also worn out and can no longer automatically clear the fly ash. The ash in the silo pump cannot be fluidized ideally during conveying, entraining the fly ash at the bottom. The heavier ash settles to the bottom of the pipe, resulting in high ash accumulation and clogging, which affects the pipe's performance.

[0003] In the existing technology, in order to prevent pipeline blockage, the conveying pressure of the ash conveying pipe is generally increased. However, since the wind force is parallel to the accumulated ash, the ash disturbing effect is extremely poor, resulting in a small amount of ash loaded by the silo pump each time, low conveying efficiency, and very unstable conveying. The compressed air consumption is large, and because the ash volume is small, the wear on the pipeline is also more serious. Utility Model Content

[0004] In response to the deficiencies in the prior art, the utility model provides a pneumatic ash conveying pipe anti-blocking and air-supplying device. The anti-blocking and air-supplying device adds an air-supplying branch pipe on the ash conveying pipe at an angle. The inclined air intake can cause disturbance to the accumulated ash in the ash conveying pipe, thereby realizing the conveying of the bottom accumulated ash by wrapping, effectively avoiding pipeline blockage, greatly increasing the ash loading capacity of the silo pump, and achieving high and stable conveying. At the same time, it reduces the conveying pressure of the ash conveying pipe, thereby greatly reducing the air pressure consumption. In addition, it effectively avoids gas conveying leakage, further ensuring stable conveying.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The pneumatic ash conveying pipe anti-blocking and air-supply device comprises an ash conveying pipe, wherein the ash conveying pipe is evenly spaced with a plurality of air-supply branches, the air-supply branches are all obliquely connected to the ash conveying pipe through a sealing sleeve, and the angle between the air-supply branch pipe and the ash conveying pipe is 35 to 45 degrees, and the top of the air-supply branch pipe is provided with a check valve to prevent the accumulation of ash from escaping, the top of the check valve is connected to the air-supply connecting pipe, and the top of the air-supply connecting pipe is connected to the air-supply conveying pipe through a pressure-regulating valve, and the pressure-regulating valve can adjust the air pressure entering the air-supply branch pipe from the air-supply conveying pipe, and the air-supply conveying pipe is connected to all the air-supply branches.

[0007] As an optimal technical solution, in order to ensure a firm connection between the air supply branch pipe and the ash conveying pipe, prevent gas leakage, improve the anti-blocking effect, and at the same time improve the strength of the ash conveying pipe, a reinforcement ring is provided on the outer wall of the connection between the ash conveying pipe and the air supply branch pipe. The reinforcement ring is penetrated by the sealing sleeve, and the reinforcement ring includes two semicircles with corresponding positioning blocks, and the positioning blocks are threadedly connected by limit bolts.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] 1. This anti-blocking air supply device adds an air supply branch pipe on the ash conveying pipe at an angle. The inclined air intake can cause disturbance to the ash accumulated in the ash conveying pipe, realize the conveying of the ash accumulated at the bottom by wrapping, effectively avoid pipeline blockage, greatly increase the ash loading capacity of the silo pump, and achieve high and stable conveying efficiency. At the same time, it reduces the conveying pressure of the ash conveying pipe, thereby greatly reducing the air pressure consumption; in addition, it effectively avoids gas leakage and further ensures stable conveying.

[0010] 2. A reinforcement ring is provided on the ash conveying pipe to ensure a firm connection between the air supply branch pipe and the ash conveying pipe, prevent gas leakage, improve the anti-blocking effect, and at the same time increase the strength of the ash conveying pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 It is a partial cross-sectional view of the utility model;

[0014] Figure numbers: 1. Ash conveying pipe, 2. Air supply branch pipe, 3. Sealing sleeve, 4. Check valve, 5. Air supply connecting pipe, 6. Pressure regulating valve, 7. Air supply conveying pipe, 8. Reinforcement ring, 9. Positioning block, 10. Positioning bolt. DETAILED DESCRIPTION

[0015] like Figure 1The figure shows a specific embodiment of the present invention, a pneumatic ash conveying pipe anti-blocking and air-supplementing device, comprising an ash conveying pipe 1, wherein the ash conveying pipe 1 is evenly spaced with a plurality of air-supplementing branch pipes 2. Under the premise of ensuring that dust accumulation disturbance can be manufactured, in order to save installation and manufacturing costs, in this embodiment, an air-supplementing branch pipe 2 is added every 1m at the ash drop end of the ash conveying pipe 20m, and ten air-supplementing branch pipes 2 are added between the pumps. The air-supplementing branch pipes 2 are all obliquely connected to the ash conveying pipe 1 through a sealing sleeve 3, and the angle between the air-supplementing branch pipe 3 and the ash conveying pipe 1 is 35-45 degrees. The top of the air-supplementing branch pipe 2 is provided with a check valve to prevent dust accumulation from escaping. Valve 4, the check valve 4 can effectively prevent the ash in the ash conveying pipe 1 from escaping from the air supply branch pipe 2 during the conveying process. The top of the check valve 4 is connected to the air supply connecting pipe 5, and the air supply connecting pipe 5 is a hose. The top of the air supply connecting pipe 5 is connected to the air supply conveying pipe 7 through a pressure regulating valve 6. The pressure regulating valve 6 can adjust the air pressure entering the air supply branch pipe 2 from the air supply conveying pipe 7. The air supply conveying pipe 7 is connected to all the air supply branches 2. In order to facilitate installation and ensure that a fixed angle is formed between the air supply branch pipe 2 and the ash conveying pipe 1, this embodiment arranges the air supply conveying pipe 2 and the ash conveying pipe 1 in parallel.

[0016] The outer wall of the connection between the ash conveying pipe 1 and the air supply branch pipe 2 is provided with a reinforcing ring 8, the reinforcing ring 8 is penetrated by the sealing sleeve 2, and the reinforcing ring 8 includes two semicircles with corresponding positioning blocks 9, and the positioning blocks 9 are threadedly connected by limit bolts 10. Figure 2 As shown, the connection between the gas supply branch pipe and the ash conveying pipe is ensured to be firm, gas leakage is prevented, the anti-blocking effect is improved, and the strength of the ash conveying pipe is increased.

[0017] When the utility model is used: the device is installed on the pneumatic ash conveying system, the air supply conveying pipe 7 is connected to the air supply device, and after the system is started, the reinforcement ring 8 is combined with the sealing sleeve 2 to improve the seal between the air supply branch pipe 2 and the ash conveying pipe 1, and the pressure regulating valve 6 adjusts the gas entering the air supply branch pipe 2 from the air supply conveying pipe 7 according to the operating conditions. Since the gas enters the ash conveying pipe 1 at an angle, it can cause disturbance to the ash accumulated at its bottom end, and then it can be transported by the air force in the ash conveying pipe 1, effectively preventing the ash conveying pipe 1 from being blocked by ash accumulation, and at the same time greatly reducing the conveying pressure of the ash conveying pipe 1. This embodiment can reduce the air pressure of the ash conveying pipe 1 from 0.44MPa to 0.4MPa, and the overall gas consumption will be reduced by 2.7Nm 3 / min, which improves the conveying efficiency and reduces the consumption of compressed air.

[0018] Of course, the above is only a detailed description of the preferred specific implementation methods of the present invention in conjunction with the accompanying drawings, and is not intended to limit the scope of implementation of the present invention. All equivalent changes made based on the principles, constructions and structures of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pneumatic ash conveying pipe anti-blocking and air supply device, comprising an ash conveying pipe (1), characterized in that: The ash conveying pipe (1) is evenly spaced with a plurality of air supply branch pipes (2). The air supply branch pipes (2) are all obliquely connected to the ash conveying pipe (1) through a sealing sleeve (3), and the angle between the air supply branch pipe (2) and the ash conveying pipe (1) is 35 to 45 degrees. The top of the air supply branch pipe (2) is provided with a check valve (4) to prevent the accumulation of ash from escaping. The top of the check valve (4) is connected to the air supply connecting pipe (5). The top of the air supply connecting pipe (5) is connected to the air supply conveying pipe (7) through a pressure regulating valve (6). The pressure regulating valve (6) can adjust the air pressure entering the air supply branch pipe (2) from the air supply conveying pipe (7). The air supply conveying pipe (7) is connected to all the air supply branch pipes (2).

2. The anti-blocking and air-supplementing device for pneumatic ash conveying pipes according to claim 1 is characterized in that: A reinforcement ring (8) is sleeved on the outer wall of the connection between the ash conveying pipe (1) and the air supply branch pipe (2), and the reinforcement ring (8) is penetrated by the sealing sleeve (3). The reinforcement ring (8) includes two semicircles with positioning blocks (9) correspondingly provided thereon, and the positioning blocks (9) are threadedly connected by limiting bolts (10).

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