High-capacity long-distance multi-point series-connection pneumatic dust conveying system

Abstract

The utility model discloses a large-capacity long-distance multi-point series-connection pneumatic dust conveying system which comprises a bin type pneumatic conveying pump, the bin type pneumatic conveying pump comprises an inverted-triangle-shaped bin type pump body, a dome valve is arranged on the top of the pump body, and a discharging tee joint is arranged at the bottom of the pump body. The bin type pneumatic conveying pumps are arranged in sequence, the discharging tee joints are connected through the conveying pipelines between the pumps, the bin type pneumatic conveying pump arranged at the foremost position serves as a main pump, and the rest bin type pneumatic conveying pumps serve as auxiliary pumps. A discharging three-way inlet of the main pump is connected with air supply equipment through an air channel pipeline, a main air inlet valve is arranged on the air channel pipeline, an outlet of the main air inlet valve is connected with a fluidization opening of the main pump through a fluidization air channel pipeline, an outlet of the air supply equipment is connected with fluidization openings of the auxiliary pumps through fluidization air channel pipelines, and auxiliary pump air inlet valves are arranged on the fluidization air channel pipelines externally connected with the fluidization openings of the auxiliary pumps. And the discharge three-way outlet of the last auxiliary pump is connected with a receiving bin through a conveying pipeline. According to the utility model, long-distance and large-capacity closed conveying of dust collected in the dust hopper of dust removal equipment in industrial production is realized.

Description

Technical Field

[0001] The utility model relates to a large-capacity, long-distance, multi-point series pneumatic dust conveying system, belonging to the field of dust pneumatic conveying. Background Art

[0002] Dust is generated in many industrial production processes. In order to keep the production environment clean, dust removal equipment is usually set up for one or some production processes. The dust removal equipment discharges the dust into the ash hopper for collection. When a certain amount of dust is collected, the dust in the ash hopper is mechanically transported to the designated receiving bin by means of a screw feeder, a scraper, a bucket elevator and a suction and exhaust vehicle. This mechanical method of conveying dust is limited by the mechanical components of the equipment itself. When conveying dust, it must be uniformly conveyed, dust-free started and dust-free stopped. Otherwise, it is easy to get stuck and damaged. In actual implementation, equipment failures frequently occur. In addition, the dust conveying process cannot be sealed, and there is a problem of secondary dust, which is bound to cause environmental pollution and low work efficiency. These problems need to be solved urgently. Utility Model Content

[0003] The purpose of the utility model is to provide a large-capacity, long-distance, multi-point series pneumatic dust conveying system, which realizes the long-distance, large-capacity, closed conveying of dust collected in the ash hopper of the dust removal equipment in the industrial production process, has high conveying efficiency, and is suitable for promotion.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A large-capacity, long-distance, multi-point series pneumatic dust conveying system, comprising a plurality of bin-type pneumatic conveying pumps, the bin-type pneumatic conveying pump comprising a bin-type pump body in an inverted triangle shape, a dome valve being provided at a feed inlet at the top of the pump body, the dome valve being used to connect with an ash outlet of an ash hopper provided below a dust removal device in an industrial production process, a balancing valve being provided between the pump body and the ash hopper, a discharge tee being provided at the bottom of the pump body, wherein: the bin-type pneumatic conveying pumps are arranged in sequence, the discharge tees at the bottom of the bin-type pneumatic conveying pumps are connected via a pump-to-pump conveying pipeline, and the bin-type pneumatic conveying pump arranged at the front is provided with a discharge tee. The pneumatic conveying pump is used as the main pump and the remaining bin-type pneumatic conveying pumps arranged behind are used as auxiliary pumps; the inlet of the discharge tee of the main pump is connected to the air supply equipment via an air pipeline, and a main air inlet valve is arranged on the air pipeline. The outlet of the main air inlet valve and the fluidization port of the main pump, as well as the outlet of the air supply equipment and the fluidization ports of each auxiliary pump are connected via a fluidization air pipeline, and an auxiliary pump air inlet valve is provided on the fluidization air pipeline connected to the fluidization port of each auxiliary pump; the outlet of the discharge tee of the last auxiliary pump is connected to the receiving bin via a conveying pipeline.

[0006] The advantages of the utility model are:

[0007] The utility model realizes long-distance, large-capacity closed centralized transportation of dust collected in the ash hopper of the dust removal equipment in the industrial production process through a multi-point series pneumatic conveying method. On the one hand, the entire conveying process has good sealing performance, there is no secondary dust problem, the conveying capacity is strong (the conveying capacity exceeds 30t / h), and the conveying distance is long (the conveying points can reach more than 16 pumps, and the distance can reach more than 500m). On the other hand, the warehouse-type pneumatic conveying pump adopts an inverted triangle warehouse-type pump body and a dome valve is arranged on the top of the pump body. This makes large-capacity transportation possible. On the other hand, the non-mechanical pneumatic conveying method is not subject to conveying uniformity, dust-free start and stop restrictions, no jamming and damage problems, avoids frequent failures, simple maintenance, high work efficiency, and reduces dust removal costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the composition of a large-capacity, long-distance, multi-point series pneumatic dust conveying system of the utility model. DETAILED DESCRIPTION

[0009] like Figure 1 The utility model provides a large-capacity, long-distance, multi-point serial pneumatic dust conveying system, which includes a plurality of bin-type pneumatic conveying pumps 60. The bin-type pneumatic conveying pump 60 includes a bin-type pump body 601 in an inverted triangle shape. A dome valve 61 is provided at a feed inlet at the top of the pump body 601. The dome valve 61 is used to connect with the ash outlet of the ash hopper 100 arranged below the dust removal equipment in the industrial production process. A balance valve 62 is provided between the pump body 601 and the ash hopper 100. A discharge tee 63 is provided at the bottom of the pump body 601, that is, a connection port of the discharge tee 63 is connected to the bottom of the pump body 601, and an inlet and an outlet of the discharge tee 63 are used to connect with a pump-to-pump conveying pipeline 93, wherein: each bin-type pneumatic conveying pump 60 is arranged in sequence, and the discharge tees 63 at the bottom of each bin-type pneumatic conveying pump 60 are connected via a pump-to-pump conveying pipeline 93. 3 connection, that is, each bin-type pneumatic conveying pump 60 forms a multi-point serial pneumatic conveying, the bin-type pneumatic conveying pump 60 arranged in the front is used as the main pump 10 and the other bin-type pneumatic conveying pumps 60 arranged in the back are used as auxiliary pumps 20; the inlet of the discharge tee 63 of the main pump 10 is connected to the air supply equipment (not shown in the figure) via the air pipeline 95, and the air pipeline 95 is provided with a total air intake valve 33, and the outlet of the total air intake valve 33 and the fluidization port of the main pump 10, and the outlet of the air supply equipment and the fluidization port of each auxiliary pump 20 are connected via a fluidization air pipeline 94, and the fluidization air pipeline 94 connected to the fluidization port of each auxiliary pump 20 is provided with an auxiliary pump air intake valve 43; the outlet of the discharge tee 63 of the auxiliary pump 20 arranged in the back is connected to the receiving bin (not shown in the figure) via a conveying pipeline 96.

[0010] like Figure 1The outlet of the air supply device is connected to the inter-pump delivery pipeline 93 between each bin-type pneumatic delivery pump 60 via an air supply pipeline 91, and an air supply pipeline 91 is provided with an auxiliary blow valve 50 for controlling the air supply to each inter-pump delivery pipeline 93. Usually, the air supply pipeline 91 connected to each inter-pump delivery pipeline 93 is used as a branch, and each branch is connected to the inlet of the main air intake valve 33 via the auxiliary blow valve 50 after merging.

[0011] In actual design, a throttling orifice 34 and a check valve 35 are provided on the air pipeline 95 connecting the inlet of the discharge tee 63 of the main pump 10 and the main air intake valve 33, with the throttling orifice 34 in front and the check valve 35 in the back.

[0012] In the actual design, a throttling orifice 41 and a check valve 42 are provided on the fluidizing gas path pipeline 94 connecting the fluidizing port of the main pump 10 and the main air intake valve 33, with the throttling orifice 41 in front and the check valve 42 in the back; a throttling orifice 44 and a check valve 45 are provided on the fluidizing gas path pipeline 94 connecting the fluidizing port of each auxiliary pump 20 and the corresponding auxiliary pump air intake valve 43, with the throttling orifice 44 in front and the check valve 45 in the back.

[0013] like Figure 1 The outlet of the air supply equipment is connected to the filter 31 and the pressure regulating valve 32 in sequence, with the filter 31 in front and the pressure regulating valve 32 in the back. The outlet of the pressure regulating valve 32 is connected to the inlet of the main air intake valve 33, each auxiliary pump air intake valve 43 and the auxiliary blowing valve 50.

[0014] Furthermore, each bin-type pneumatic conveying pump 60 is equipped with an air control box 70, wherein: an on-site pressure gauge is installed at the inlet of the discharge tee 63 of the main pump 10, and the on-site pressure gauge is connected to the air control box 70 equipped with the main pump 10 via a pressure transmitter, and the air control box 70 equipped with the main pump 10 is connected to the main air intake valve 33, the dome valve 61 and the balancing valve 62 of the main pump 10, so as to control their opening and closing by control air; the air control box 70 equipped with the auxiliary pump 20 is connected to its own dome valve 61, the balancing valve 62 and the auxiliary pump air intake valve 43 set at the fluidization port, so as to control their opening and closing by control air.

[0015] In addition, the air control box 70 provided for the main pump 10 is also used to control the opening and closing of the pressure regulating valve 32 .

[0016] In the present invention, the air control box 70 is a well-known device in the art, which mainly manages whether the control air is sent to each valve, so as to realize the control of opening and closing of each valve by the control air, and adopts a pneumatic control method. The inlet of the air control box 70 can be connected to the air supply equipment through a pipeline.

[0017] In the utility model, the local pressure gauge is used to detect the pressure in the gas pipeline 95 and the pump-to-pump delivery pipeline 93. When the detected pressure reaches the set threshold, it indicates that there is no dust in the pipeline and the dust delivery is completed. The pressure transmitter is used to transmit the pressure data detected by the local pressure gauge to the air control box 70, so that the air control box 70 controls the opening and closing of the main air intake valve 33. The filter 31 is used to filter impurities in the delivery gas sent by the air supply equipment. The pressure regulating valve 32 is used to adjust the delivery gas pressure sent by the air supply equipment to the pressure required for the pipeline to transport dust. The throttle orifice plates 34, 41, and 44 are used to control the gas flow entering the fluidization port. The check valves 35, 42, and 45 are used to prevent gas backflow. The main air intake valve 33 is used to control the start and stop of dust delivery on the one hand, and on the other hand, it is used to control the delivery gas sent into the main pump 10 to stir the dust. The auxiliary pump air intake valve 43 is used to control the delivery gas sent into the auxiliary pump 20 to stir the dust.

[0018] The bin-type pneumatic conveying pump 60 adopts a bin-type pump body 601 and a dome valve that can be completely sealed, prevent leakage, and is suitable for pneumatic conveying. The dome valve 61 makes the pump body 601 form a sealed state when conveying dust, cuts off the connection between the pump body 601 and the ash hopper 100, and is conducive to large-capacity conveying. The volume of the bin-type pneumatic conveying pump 60 used in the utility model is 0.35m 3 -3.5m 3 In between, there is a large capacity pump.

[0019] like Figure 1 The conveying pipe 96 connected to the outlet of the discharge tee 63 of the last auxiliary pump 20 is connected to the ash hopper 100 above via a drain pipe 92, and a drain valve 80 is provided on the drain pipe 92.

[0020] In actual design, each air control box 70, blowing-assisting valve 50, and drain valve 80 can be connected to and controlled by a PLC controller. In addition, a level meter (not shown in the figure) provided in the ash hopper 100 is also connected to the PLC controller for transmitting dust collection amount data to the PLC controller.

[0021] In the present invention, the position where the gas arrives first is the front, and the position where the gas arrives later is the rear.

[0022] During operation, if the material level meters in the ash hoppers 100 are not covered by dust, the dome valves 61 on the tops of the bin-type pneumatic conveying pumps 60 are closed, and the pump bodies 601 are in a sealed state, and the dust in the ash hoppers 100 is not pneumatically conveyed.

[0023] If the material level meter in any ash hopper 100 is covered by dust, the system is started based on the PLC controller, and the dome valves 61 are opened in sequence and kept open for a certain time to allow the dust in the ash hopper 100 to fall into the pump body 601. When the opening time is reached, the dome valves 61 are closed, and the pump body 601 achieves a sealing and pressurizing effect, and dust transportation begins at this time.

[0024] The main air inlet valve 33 and the air inlet valves 43 of each auxiliary pump are controlled to open. On the one hand, the conveying gas (compressed air) enters the pump body 601 to stir the dust in the pump body 601 so that the dust can easily fall into the discharge tee 63. On the other hand, it enters the discharge tees 63 and the inter-pump conveying pipeline 93 through the air pipeline 95 to finally convey the dust in the pump body 601 to the receiving bin in a pneumatic manner.

[0025] When the local pressure gauge detects that the pressure in the air pipeline 95 drops to the set threshold (such as 0.3 Bar), it means that there is no dust in the pipeline and the dust transportation is completed. Therefore, the air control box 70 equipped with the main pump 10 controls the main air intake valve 33 to close based on the pressure data fed back by the pressure transmitter, ends the transportation, and waits for the next dust transportation to start.

[0026] When the air force for conveying dust between the pumps is insufficient, the auxiliary blowing valve 50 is controlled to open, and the conveying air is blown into the conveying pipes 93 between the pumps, so that the dust conveying can be completed more smoothly.

[0027] Before starting the next dust transportation, the balance valve (or exhaust valve) 62 is controlled to open according to actual needs to adjust the pressure difference between the ash hopper 100 and the pump body 601, so that the dust in the ash hopper 100 can fall into the pump body 601 smoothly.

[0028] The advantages of the utility model are:

[0029] The utility model realizes long-distance, large-capacity closed centralized transportation of dust collected in the ash hopper of the dust removal equipment in the industrial production process through a multi-point series pneumatic conveying method. On the one hand, the entire conveying process has good sealing performance, there is no secondary dust problem, the conveying capacity is strong (the conveying capacity exceeds 30t / h), and the conveying distance is long (the conveying points can reach more than 16 pumps, and the distance can reach more than 500m). On the other hand, the warehouse-type pneumatic conveying pump adopts an inverted triangle-shaped pump body and a dome valve is arranged on the top of the pump body. This makes large-capacity transportation possible. On the other hand, the non-mechanical pneumatic conveying method is not subject to conveying uniformity, dust-free start and stop restrictions, no jamming and damage problems, avoids frequent failures, simple maintenance, high work efficiency, and reduces dust removal costs.

[0030] The above are preferred embodiments of the present invention and the technical principles used therein. For those skilled in the art, without departing from the spirit and scope of the present invention, any obvious changes such as equivalent transformation, simple replacement, etc. based on the technical solution of the present invention are within the protection scope of the present invention.

Claims

1. A large-capacity, long-distance, multi-point series pneumatic dust conveying system, characterized in that: It comprises a plurality of bin-type pneumatic conveying pumps, wherein the bin-type pneumatic conveying pump comprises a bin-type pump body in an inverted triangle shape, a dome valve is provided at the feed inlet at the top of the pump body, the dome valve is used to connect with the ash outlet of the ash hopper arranged below the dust removal equipment in the industrial production process, a balancing valve is provided between the pump body and the ash hopper, and a discharge tee is provided at the bottom of the pump body, wherein: the bin-type pneumatic conveying pumps are arranged in sequence, the discharge tees at the bottom of the bin-type pneumatic conveying pumps are connected via a pump-to-pump conveying pipeline, and the bin-type pneumatic conveying pump arranged in front serves as the main pump The remaining bin-type pneumatic conveying pumps arranged at the back serve as auxiliary pumps; the inlet of the discharge tee of the main pump is connected to the air supply equipment via an air pipeline, and a main air inlet valve is provided on the air pipeline. The outlet of the main air inlet valve and the fluidizing port of the main pump, as well as the outlet of the air supply equipment and the fluidizing ports of each auxiliary pump are connected via a fluidizing air pipeline, and an auxiliary pump air inlet valve is provided on the fluidizing air pipeline connected to the fluidizing port of each auxiliary pump; the outlet of the discharge tee of the last auxiliary pump is connected to the receiving bin via a conveying pipeline.

2. The large-capacity, long-distance, multi-point series pneumatic dust conveying system according to claim 1 is characterized in that: The outlet of the air supply device is connected to the inter-pump delivery pipeline between each of the bin-type pneumatic delivery pumps via an air supply pipeline, and the air supply pipeline is provided with an auxiliary blowing valve for controlling the air supply to each of the inter-pump delivery pipelines.

3. The large-capacity, long-distance, multi-point series pneumatic dust conveying system according to claim 2 is characterized in that: A throttling orifice plate and a check valve are provided on the air path pipeline connected between the inlet of the discharge tee of the main pump and the main air intake valve.

4. The large-capacity, long-distance, multi-point series pneumatic dust conveying system according to claim 3 is characterized in that: A throttling orifice plate and a check valve are provided on the fluidizing gas path pipeline connected between the fluidizing port of the main pump and the main air intake valve, and a throttling orifice plate and a check valve are provided on the fluidizing gas path pipeline connected between the fluidizing port of each auxiliary pump and the corresponding auxiliary pump air intake valve.

5. The large-capacity, long-distance, multi-point series pneumatic dust conveying system according to claim 3 is characterized in that: The outlet of the air supply device is connected to a filter and a pressure regulating valve in sequence, and the outlet of the pressure regulating valve is connected to the inlet of the main air intake valve, each of the auxiliary pump air intake valves and the blow-assisting valve.

6. The large-capacity, long-distance, multi-point series pneumatic dust conveying system according to any one of claims 1 to 5, characterized in that: Each of the above-mentioned bin-type pneumatic conveying pumps is equipped with an air control box, wherein: an on-site pressure gauge is installed at the inlet of the discharge tee of the main pump, and the on-site pressure gauge is connected to the air control box equipped with the main pump via a pressure transmitter, and the air control box equipped with the main pump is connected to the main air intake valve, the dome valve and the balancing valve of the main pump; the air control box equipped with the auxiliary pump is connected to its own dome valve, the balancing valve and the auxiliary pump air intake valve arranged at the fluidization port.

7. The large-capacity, long-distance, multi-point series pneumatic dust conveying system according to claim 6 is characterized in that: The conveying pipeline connected to the outlet of the discharge tee of the last auxiliary pump is connected to the ash hopper above via a drain pipe, and a drain valve is provided on the drain pipe.

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