Pneumatic ash conveying device

Abstract

According to the pneumatic ash conveying device, the control end of a pneumatic dome valve is connected with an instrument air source through a pipeline and a first filter, an air inlet of a bin pump is connected with an ash conveying air source through a pipeline, and a second filter, an oil-water separation pressure regulating valve and a first air valve are sequentially arranged on the pipeline between the ash conveying air source and the bin pump; the blowing-assisting unblocking device comprises at least two blowing-assisting air inlets which are formed in the side wall of the ash conveying pipeline at intervals, and the blowing-assisting air inlets are connected with the air source through pipelines and second air valves. An independent ash conveying gas source and an instrument gas source are adopted, and independent compressed air or nitrogen gas storage tanks are adopted respectively, so that the stability of pressure and flow of ash conveying inlet gas and blowing assisting inlet gas is ensured, and the ash conveying efficiency is improved. When the ash conveying pipeline is blocked, the first air valve and the second air valve are opened at the same time, and the ash conveying pipeline is blown in a segmented and assisted mode through the multiple blowing assisting air inlets, so that the blockage clearing effect is improved, and the blockage clearing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a pneumatic ash conveying technology, in particular to a pneumatic ash conveying device. Background Art

[0002] With the rapid development of industrial production, such as steel mills, coking plants, and power plants, a large amount of dust gas containing toxic and harmful substances will be generated. These dust gases must be purified by the dust removal system before being discharged into the atmosphere. The dust deposited in the dust hopper of the dust removal chamber is transported to the ash tank through the dust removal and ash conveying system. After being stored in the ash tank, it is transported to the dust treatment point by tank trucks for further treatment. The pneumatic conveying device is an advanced ash conveying device that comprehensively utilizes the static and dynamic pressures of compressed air or nitrogen to convey materials with high concentration and high efficiency. The entire system of the positive pressure pneumatic ash conveying device consists of five parts: instrument air source part, conveying part, pipeline part, ash storage part and control part, and its core is the silo pump. Each pump of dust is a working cycle, and each cycle is divided into five stages: pneumatic seal detection, feeding, fluidization, conveying, and purging. In the last three stages of each cycle, a certain amount of gas (such as nitrogen, compressed air, etc.) must be consumed, and these gases eventually enter the ash silo with the dust.

[0003] In the prior art, the pneumatic ash conveying device includes an ash hopper, a silo pump, a dome valve, an air source, etc. The existing pneumatic ash conveying device has the following problems:

[0004] 1. The air source for ash conveying and the air source for instruments use the same air source, resulting in insufficient air pressure for ash conveying and instruments, insufficient ash conveying efficiency, and easy instrument failure.

[0005] 2. Because the nitrogen or compressed air used in the pneumatic ash conveying instrument contains impurities, dust and moisture, once it enters the control valve or cylinder of the instrument, it is easy to cause wear and blockage, and eventually lead to damage to various equipment, seriously affecting the stability of the ash conveying system.

[0006] 3. The main ash conveying pipe is easy to be blocked. The clearing device is designed and installed at the front end of the main ash conveying pipe. The pipe is connected to the ash hopper, and the blocked pipe is cleared by blowing and blowing. Once the ash level in the ash hopper is higher than the clearing pipe, there will be no negative pressure, and the pipe cannot be cleared. Summary of the invention

[0007] The utility model aims to provide a pneumatic ash conveying device, which aims to solve the technical problems in the prior art of insufficient air source pressure, impurities cannot be removed, and poor clearing effect.

[0008] The utility model discloses a pneumatic ash conveying device, comprising an ash conveying air source, an instrument air source, an ash hopper, a silo pump and an ash silo. The silo pump is arranged at the lower side of the ash hopper, a feeding port is arranged at the top of the silo pump, an air inlet and a material outlet are arranged on both sides of the bottom of the silo pump respectively, the ash outlet of the ash hopper is connected with the ash inlet of the silo pump through a pipeline and a pneumatic dome valve, the control end of the pneumatic dome valve is connected with the instrument air source through a pipeline and a first filter, the air inlet of the silo pump is connected with the ash conveying air source through a pipeline, a second filter, an oil-water separation pressure regulating valve and a first air valve are arranged in sequence on the pipeline between the ash conveying air source and the silo pump, the material outlet of the silo pump is connected with the ash silo through an ash conveying pipeline, an auxiliary blowing and clearing device is arranged on the ash conveying pipeline, the auxiliary blowing and clearing device comprises at least two auxiliary blowing air inlets arranged at intervals on the side wall of the ash conveying pipeline, and the auxiliary blowing air inlets are both connected with the air source through pipelines and second air valves.

[0009] Furthermore, the first filter and the second filter are both Y-type filters.

[0010] Compared with the prior art, the utility model has a positive and obvious effect. A separate ash conveying air source and instrument air source are used, and each uses a separate compressed air or nitrogen gas storage tank to ensure the stability of the pressure and flow of the ash conveying air intake and the auxiliary blowing air intake, improve the ash conveying efficiency, ensure that the working pressure of the instrument air source is above 0.6MPa, and reduce the failure rate of the instrument equipment. The first filter and the second filter can effectively remove impurities and dust in the compressed gas, and the oil-water separation pressure regulating valve can effectively remove moisture in the compressed gas to prevent pipeline blockage. When the ash conveying pipeline is blocked, the first air valve and the second air valve are opened at the same time, and the ash conveying pipeline is blown in sections through multiple auxiliary blowing air inlets, so as to improve the clearing effect and the clearing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The utility model is a schematic diagram of a pneumatic ash conveying device. DETAILED DESCRIPTION

[0012] The present invention is further described below in conjunction with an embodiment, but the present invention is not limited to the embodiment. Any similar structure and similar changes of the present invention should be included in the protection scope of the present invention. The use of directions such as up, down, front, back, left, and right in the present invention is only for the convenience of clear description and is not a limitation on the technical solution of the present invention.

[0013] like Figure 1As shown, a pneumatic ash conveying device of the utility model comprises an ash conveying air source 1, an instrument air source 2, an ash hopper 3, a silo pump 4, and an ash silo 5. The silo pump 4 is arranged at the lower side of the ash hopper 3, a feed inlet is arranged at the top of the silo pump 4, and an air inlet and a discharge port are arranged at both sides of the bottom of the silo pump 4 respectively. The ash outlet of the ash hopper 3 is connected to the ash inlet of the silo pump 4 through a pipeline and a pneumatic dome valve 6, and the control end of the pneumatic dome valve 6 is connected to the instrument air source 2 through a pipeline and a first filter 7. The air inlet of the silo pump 4 It is connected to the ash conveying air source 1 through a pipeline, and a second filter 9, an oil-water separation pressure regulating valve 8 and a first air valve 10 are sequentially arranged on the pipeline between the ash conveying air source 1 and the silo pump 4. The discharge port of the silo pump 4 is connected to the ash silo 5 through an ash conveying pipeline 11, and a blowing and clearing device is arranged on the ash conveying pipeline 11. The blowing and clearing device comprises at least two blowing air inlets 12 spaced apart on the side wall of the ash conveying pipeline 11, and the blowing air inlets 12 are connected to the air source through pipelines and a second air valve 13.

[0014] Furthermore, the first filter 7 and the second filter 9 are both Y-type filters.

[0015] Specifically, in this embodiment, multiple ash hoppers 3 and silo pumps 4 can be connected in series or in parallel to jointly transport ash materials. The distance between adjacent auxiliary air inlets 12 is 2.5 meters.

[0016] Specifically, the ash hopper 3, silo pump 4, ash silo 5, pneumatic dome valve 6, first filter 7, second filter 9, oil-water separation pressure regulating valve 8, Y-type filter, etc. in this embodiment all adopt well-known solutions in the prior art, which are well understood by those skilled in the art and will not be described in detail here.

[0017] The working process of this embodiment:

[0018] The instrument air source 2 delivers compressed air through the pipeline to open the pneumatic dome valve 6, and the ash in the ash hopper 3 enters the silo pump 4. Then, the first air valve 10 is opened, and the ash delivery air source 1 delivers compressed air through the pipeline to enter the silo pump 4, and the ash in the silo pump 4 is delivered to the ash silo 5 through the ash delivery pipeline 11.

[0019] Advantages of the utility model:

[0020] 1. Use separate ash conveying air source 1 and instrument air source 2, and use separate compressed air or nitrogen gas storage tanks respectively to ensure the stability of the pressure and flow of ash conveying air intake and auxiliary blowing air intake, improve ash conveying efficiency, ensure that the working pressure of instrument air source 2 is above 0.6MPa, and reduce the failure rate of instrument equipment.

[0021] 2. The first filter 7 and the second filter 9 can effectively remove impurities and dust in the compressed gas, and the oil-water separation pressure regulating valve 8 can effectively remove moisture in the compressed gas to prevent pipeline blockage.

[0022] 3. When the ash conveying pipeline 11 is blocked, the first air valve 10 and the second air valve 13 are opened at the same time, and the ash conveying pipeline is blown in sections through multiple blowing air inlets 12 to improve the clearing effect and the clearing efficiency.

Claims

1. A pneumatic ash conveying device, characterized in that: It includes an ash conveying air source, an instrument air source, an ash hopper, a silo pump and an ash silo. The silo pump is arranged at the lower side of the ash hopper, a feed port is arranged on the top of the silo pump, and an air inlet and a discharge port are respectively arranged on both sides of the bottom of the silo pump. The ash discharge port of the ash hopper is connected with the ash inlet of the silo pump through a pipeline and a pneumatic dome valve, the control end of the pneumatic dome valve is connected with the instrument air source through a pipeline and a first filter, the air inlet of the silo pump is connected with the ash conveying air source through a pipeline, a second filter, an oil-water separation pressure regulating valve and a first air valve are sequentially arranged on the pipeline between the ash conveying air source and the silo pump, the discharge port of the silo pump is connected with the ash silo through an ash conveying pipeline, and an auxiliary blowing and clearing device is arranged on the ash conveying pipeline. The auxiliary blowing and clearing device includes at least two auxiliary blowing air inlets arranged at intervals on the side wall of the ash conveying pipeline, and the auxiliary blowing air inlets are both connected with the air source through pipelines and a second air valve.

2. A pneumatic ash conveying device according to claim 1, characterized in that: The first filter and the second filter are both Y-type filters.

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