Novel pulverized coal dense-phase conveying cyclone gas-solid separation device

Abstract

The embodiment of the utility model provides a novel pulverized coal dense-phase conveying cyclone gas-solid separation device which comprises a pulverized coal storage tank, a middle seal head is fixedly connected to the middle of an inner cavity of the pulverized coal storage tank, the middle seal head partitions the inner cavity of the pulverized coal storage tank from the middle, a cyclone separation mechanism is installed below the middle seal head in the inner cavity of the pulverized coal storage tank, and the cyclone separation mechanism is connected with the pulverized coal storage tank. The cyclone separation mechanism comprises a cyclone cylinder, the top end of the cyclone cylinder is closed, the bottom end of the cyclone cylinder is in butt joint with a cyclone cone, the cyclone cone is in a funnel shape, the diameter of the top end of the cyclone cone is larger than that of the bottom end of the cyclone cone, and a gas rising pipe is arranged in the cyclone cylinder. The gas rising pipe penetrates through the top end of the cyclone barrel and the middle sealing head, so that the top end of the gas rising pipe is positioned above the middle sealing head; and the cyclone barrel is connected with a plurality of lifting pipes. Pulverized coal and gas two-phase flow do high-speed tangential rotation flow in the cyclone cylinder body, and separation of gas and solid two-phase flow in the equipment is achieved when the gas and solid two-phase flow flows to the bottom end of the gas rising pipe.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas-solid separation devices, and in particular relates to a novel cyclone gas-solid separation device for dense phase conveying of pulverized coal. Background Art

[0002] In the dense phase conveying system of the pulverized coal pressurized gasification device, a pulverized coal conveying and separation system is usually used to convey the pulverized coal and separate the gas and solid. In order to achieve the separation of pulverized coal and gas, a plurality of pulverized coal bag filters are usually arranged in the pulverized coal separation system to separate the coal powder and the conveying gas.

[0003] In the traditional coal gasification industry, the separation of gas and solid phases relies on pulverized coal bag filters. Its working principle is to suck the raw coal ground at the 0-meter position of the gasification frame into the pulverized coal bag filter at a height of about 90 meters by the fan. The pulverized coal gas and solid phases flow through the air inlet duct and the filter bag and then enter the ash hopper, and then enter the electric fiber separator and the pulverized coal screw conveyor through the rotary unloading valve in turn, enter the raw coal storage bin, and finally enter the pulverized coal storage tank.

[0004] The existing technology uses a huge pulverized coal separation system, the external pipelines connected to it are also very complicated, and the one-time investment cost of the equipment is very high. In order to reduce the engineering cost of the entire dense phase conveying system and make the entire system more compact and more efficient, it is necessary to develop a new type of pulverized coal conveying and gas-solid separation system. Utility Model Content

[0005] In view of the above problems existing in the prior art, the purpose of the embodiments of the present utility model is to provide a new cyclone gas-solid separation device for dense phase conveying of pulverized coal.

[0006] The technical solution adopted in the embodiment of the utility model is a novel pulverized coal dense phase conveying cyclone gas-solid separation device, comprising a pulverized coal storage tank, wherein an intermediate head is fixedly connected to the middle part of the inner cavity of the pulverized coal storage tank, and the intermediate head separates the inner cavity of the pulverized coal storage tank from the middle part; a cyclone separation mechanism is installed below the intermediate head in the inner cavity of the pulverized coal storage tank, and the cyclone separation mechanism comprises a cyclone cylinder, the top end of the cyclone cylinder is closed, and the bottom end of the cyclone cylinder is connected to a cyclone cone, the cyclone cone is funnel-shaped with a top diameter larger than a bottom diameter, and an air riser is provided in the cyclone cylinder, and the air riser passes through the top end and the intermediate head of the cyclone cylinder so that the top end of the air riser is located above the intermediate head; a plurality of lifting pipes are connected to the cyclone cylinder.

[0007] Furthermore, the lifting pipe is tangent to the wall of the cyclone cylinder at the connection between the lifting pipe and the cyclone cylinder.

[0008] Furthermore, a flow guide cover is installed above the middle head in the inner cavity of the pulverized coal storage tank, and the top end of the riser is inserted into the flow guide cover.

[0009] Furthermore, the riser is connected to a plurality of suction pipes on the pipe wall inside the air guide cover, and the suction pipes penetrate the middle end cap so that one end of the suction pipe away from the riser is located below the middle end cap.

[0010] Furthermore, one end of the suction pipe away from the riser is connected with a bell mouth.

[0011] Furthermore, a plurality of conical guide plates are fixedly connected to the inner wall of the pulverized coal storage tank above the middle head.

[0012] Furthermore, the pulverized coal storage tank is also connected to a material balance pipe, and both ends of the material balance pipe are respectively connected to the inner cavity of the pulverized coal storage tank above and below the middle head.

[0013] Furthermore, the bottom end of the cyclone cone is connected to a feed pipe, and the feed pipe is vertically arranged.

[0014] Furthermore, the bottom end of the pulverized coal storage tank is provided with an outlet, and the pulverized coal storage tank is provided with a fluidizing gas inlet, and the top end of the pulverized coal storage tank is connected with an elbow pipe.

[0015] Furthermore, the bottom end of the pulverized coal storage tank is constructed in a funnel shape with a top diameter larger than a bottom diameter.

[0016] Compared with the prior art, the utility model has a two-phase flow of pulverized coal and gas flowing from bottom to top in the riser at high speed. Under the action of initial kinetic energy, the gas-solid two-phase flow enters the cyclone separation mechanism and makes a high-speed tangential rotation flow in the cyclone cylinder. When the gas-solid two-phase flow reaches the bottom of the riser, due to the difference in inertia between pulverized coal and gas and the reduction in flow area, the gas will change its flow direction and flow upward from the riser, while the solid particles will settle downward, thereby achieving the separation of the gas-solid two-phase flow in the equipment.

[0017] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not intended to restrict the present invention.

[0018] The overview of various implementations or examples of the technology described in this utility model is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In the drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the embodiments of the utility model. When appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present device or method.

[0020] Figure 1 It is a schematic structural diagram of an embodiment of the utility model.

[0021] Figure 2 This is a schematic diagram of the installation of the cyclone cylinder according to an embodiment of the utility model. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of 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.

[0023] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0025] See also Figures 1 to 2The embodiment of the utility model provides a novel cyclone gas-solid separation device for dense phase conveying of pulverized coal, comprising a pulverized coal storage tank 1, wherein an intermediate head 2 is fixedly connected to the middle of the inner cavity of the pulverized coal storage tank 1, and the intermediate head 2 separates the inner cavity of the pulverized coal storage tank 1 from the middle, and a cyclone separation mechanism is installed below the intermediate head 2 in the inner cavity of the pulverized coal storage tank 1, and the cyclone separation mechanism comprises a cyclone cylinder 3, the top of the cyclone cylinder 3 is closed, and the bottom end of the cyclone cylinder 3 is connected to a cyclone cone 4, and the cyclone cone 4 is funnel-shaped with a top diameter larger than a bottom diameter, and an air riser 5 is arranged in the cyclone cylinder 3, and the air riser 5 passes through the top of the cyclone cylinder 3 and the intermediate head 2 so that the top of the air riser 5 is located above the intermediate head 2; and a plurality of lifting pipes 6 are connected to the cyclone cylinder 3. In the utility model, the pulverized coal and gas two-phase flow flows from bottom to top in the riser 6 at high speed. Under the action of initial kinetic energy, the gas and solid two-phase flow enters the cyclone separation mechanism and makes high-speed tangential rotation flow in the cyclone cylinder 3. When the gas and solid two-phase flow reaches the bottom of the riser 5, due to the difference in inertia between the pulverized coal and the gas and the reduction in the flow area, the gas will change the flow direction and flow upward from the riser 5, while the solid particles will settle downward, thereby achieving the separation of the gas and solid two-phase flow in the equipment.

[0026] See also Figure 2 At the connection between the lifting pipe 6 and the cyclone barrel 3, the lifting pipe 6 is tangent to the barrel wall of the cyclone barrel 3. The lifting pipe 6 is tangent to the barrel wall of the cyclone barrel 3 so that the pulverized coal and gas two-phase flow can form a swirl in the cyclone barrel 3 after entering the cyclone barrel 3 at a high speed.

[0027] A flow guide hood 7 is installed above the intermediate end cap 2 in the inner cavity of the pulverized coal storage tank 1, and the top end of the gas riser 5 is inserted into the flow guide hood 7. The gas flowing through the gas riser 5 will carry a small amount of solid particles through the intermediate end cap 2 and flow upward along the gas riser 5 to the flow guide 7 at the top of the gas riser 5. In the process of flowing out of the flow guide 7, the gas-solid two-phase flow will experience two changes in flow direction at the top of the gas riser 5 and the bottom edge of the flow guide 7. Since the inertia of solid particles is large and the inertia of gas is small, the two changes in flow direction will further separate the gas-solid two-phase flow, thereby realizing the second separation of pulverized coal and gas.

[0028] The riser 5 is located in the air guide 7 and connected to a plurality of suction pipes 8 on the pipe wall. The suction pipe 8 penetrates the middle end cap 2 so that one end of the suction pipe 8 away from the riser 5 is located below the middle end cap 2. A small amount of pulverized coal will exist in the gas below the middle end cap 2 in the inner cavity of the pulverized coal storage tank 1. The connection between the riser 5 and the suction pipe 8 is located in the air guide 7. The gas flow rate in the air guide 7 is greater than the gas flow rate of the part below the middle end cap 2 in the inner cavity of the pulverized coal storage tank 1, so that the gas below the middle end cap 2 in the inner cavity of the pulverized coal storage tank 1 can be sucked, and the gas below the middle end cap 2 in the inner cavity of the pulverized coal storage tank 1 can be sucked to the top of the middle end cap 2 for separation. The suction pipe 8 is connected to a bell mouth 9 at one end away from the riser 5. The bell mouth 9 can facilitate the suction of the gas below the middle end cap 2 in the inner cavity of the pulverized coal storage tank 1.

[0029] A plurality of conical guide plates 10 are fixedly connected to the inner wall of the pulverized coal storage tank 1 above the middle end cap 2. The gas-solid two-phase flow flows out from the lower edge of the guide cover 7 and enters the conical guide plate group 10 at the upper part of the equipment. In the process of passing through the conical guide plates 10, the flow direction of the gas-solid two-phase flow will change continuously. At the same time, the existence of the conical guide plates 10 also plays a role in guiding and blocking the flow of the gas-solid two-phase flow, significantly reducing the flow velocity of the gas-solid two-phase, so that a high velocity difference is quickly formed between the gas and the pulverized coal particles, thereby realizing the final separation of the pulverized coal and the gas.

[0030] The pulverized coal storage tank 1 is also connected to a material balance pipe 11, and the two ends of the material balance pipe 11 are respectively connected to the inner cavity of the pulverized coal storage tank 1 above and below the middle end cap 2. The pulverized coal solid particles settled to the middle end cap 2 will be discharged to the lower part of the inner cavity of the pulverized coal storage tank 1 under the action of the material balance pipe 11, thereby ensuring the operational stability of the entire system.

[0031] The bottom end of the cyclone cone 4 is connected to a discharge pipe 12, which is arranged vertically. The discharge pipe 12 is used to discharge the separated solid particles.

[0032] The bottom end of the pulverized coal storage tank 1 is provided with an outlet 13, and the pulverized coal storage tank 1 is provided with a fluidizing gas inlet 14, and the top end of the pulverized coal storage tank 1 is connected with an elbow pipe 15. The fluidizing gas inlet 14 allows a small flow of gas to prevent solid particles from accumulating and blocking the outlet 13 at the bottom end of the pulverized coal storage tank 1.

[0033] The bottom end of the pulverized coal storage tank 1 is constructed in a funnel shape with a top diameter larger than a bottom diameter, which is conducive to discharging solid particles.

[0034] The above description is intended to be illustrative rather than restrictive, and those skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure. Moreover, the above examples (or one or more of them) may be used in combination with each other, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations.

Claims

1. A novel cyclonic gas-solid separation device for dense phase conveying of pulverized coal, comprising a pulverized coal storage tank (1), characterized in that: An intermediate head (2) is fixedly connected to the middle of the inner cavity of the pulverized coal storage tank (1), and the intermediate head (2) separates the inner cavity of the pulverized coal storage tank (1) from the middle. A cyclone separation mechanism is installed below the intermediate head (2) in the inner cavity of the pulverized coal storage tank (1), and the cyclone separation mechanism comprises a cyclone barrel (3), the top end of the cyclone barrel (3) is closed, and the bottom end of the cyclone barrel (3) is connected to a cyclone cone (4), and the cyclone cone (4) is in the shape of a funnel with a top diameter larger than a bottom diameter. An air riser (5) is arranged in the cyclone barrel (3), and the air riser (5) passes through the top end of the cyclone barrel (3) and the intermediate head (2) so that the top end of the air riser (5) is located above the intermediate head (2); and a plurality of lifting pipes (6) are connected to the cyclone barrel (3).

2. The novel cyclone gas-solid separation device for dense phase conveying of pulverized coal according to claim 1 is characterized in that: At the connection point between the lifting pipe (6) and the cyclone barrel (3), the lifting pipe (6) and the barrel wall of the cyclone barrel (3) are tangent.

3. The novel cyclone gas-solid separation device for dense phase conveying of pulverized coal according to claim 1 is characterized in that: A flow guide cover (7) is installed above the intermediate end cover (2) in the inner cavity of the pulverized coal storage tank (1), and the top end of the air riser (5) is inserted into the flow guide cover (7).

4. The novel cyclone gas-solid separation device for dense phase conveying of pulverized coal according to claim 3 is characterized in that: The riser (5) is located on a pipe wall inside the air guide cover (7) and is connected to a plurality of suction pipes (8). The suction pipes (8) penetrate the middle end cap (2) so that one end of the suction pipe (8) away from the riser (5) is located below the middle end cap (2).

5. The novel cyclone gas-solid separation device for dense phase conveying of pulverized coal according to claim 4 is characterized in that: One end of the suction pipe (8) away from the riser pipe (5) is connected to a bell mouth (9).

6. The novel cyclone gas-solid separation device for dense phase conveying of pulverized coal according to claim 1 is characterized in that: A plurality of conical guide plates (10) are fixedly connected to the inner wall of the pulverized coal storage tank (1) above the intermediate end cap (2).

7. The novel cyclone gas-solid separation device for dense phase conveying of pulverized coal according to claim 1 is characterized in that: The pulverized coal storage tank (1) is also connected to a material balance pipe (11), and both ends of the material balance pipe (11) are respectively connected to the inner cavity of the pulverized coal storage tank (1) above and below the middle cover (2).

8. The novel cyclone gas-solid separation device for dense phase conveying of pulverized coal according to claim 1 is characterized in that: The bottom end of the cyclone cone (4) is butt-jointed with a feed pipe (12), and the feed pipe (12) is arranged vertically.

9. The novel cyclone gas-solid separation device for dense phase conveying of pulverized coal according to claim 1 is characterized in that: The bottom end of the pulverized coal storage tank (1) is provided with an outlet (13), and the pulverized coal storage tank (1) is provided with a fluidizing gas inlet (14), and the top end of the pulverized coal storage tank (1) is connected to an elbow pipe (15).

10. The novel cyclone gas-solid separation device for dense phase conveying of pulverized coal according to claim 9 is characterized in that: The bottom end of the pulverized coal storage tank (1) is structured in a funnel shape with a top diameter larger than a bottom diameter.

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