Annular cavity powder pressurized conveying device

Abstract

The present invention discloses an annular cavity type pressurized pulverized coal conveying device, which comprises an annular cavity, a normal pressure silo, a high pressure silo and a plurality of plungers. The upper part of the annular cavity is provided with an inlet, and the lower part is provided with an outlet. The normal pressure silo is connected with the inlet, and the high pressure silo is connected with the outlet. The plunger is placed in the annular cavity and can slide relative to the annular cavity. A plurality of plungers are connected in sequence by a traction rope to form an annular shape. When the traction rope between two adjacent plungers is in a tensioned state, a accommodating space capable of storing powder is formed between the two adjacent plungers. The high pressure silo is provided with a toggle mechanism for driving the plunger to slide in the annular cavity. The annular cavity type powder pressurized conveying device of the present invention realizes continuous conveying of powder, reduces energy consumption, and avoids the emission of inert gas.

Description

Technical Field

[0001] The invention relates to the technical field of powder pressurized conveying, and in particular to an annular cavity type powder pressurized conveying device. Background Art

[0002] Powder is a collection of numerous small particles. Common powders include pulverized coal, flour or cement powder.

[0003] The pressurized conveying process of powders is involved in many fields such as coal chemical industry, metallurgy, and food processing. Coal gasification, especially pressurized pulverized coal gasification, is a clean coal utilization technology that has developed rapidly in recent years and has been used more and more widely. Pressurized pulverized coal conveying technology is an indispensable technical link in pressurized pulverized coal gasification technology. Pressurized pulverized coal conveying technology is to increase the dry coal powder from normal pressure to a certain high pressure to achieve combustion and gasification of pulverized coal under high pressure.

[0004] The pulverized coal pressurized conveying technology currently used in industry is mainly lock hopper pressurized conveying, the principle of which is to use high-pressure inert gas to flush into the pulverized coal pressurized lock hopper to increase the pressure, and then transport the pulverized coal to the pulverized coal storage tank after the pressure is balanced with the pulverized coal storage tank, and use high-pressure inert gas to replace the solid pulverized coal in the lock hopper, and then discharge the high-pressure inert gas in the pulverized coal lock hopper, and repeat the cycle. For example, CN1376761A discloses a method and device for feeding dry coal powder during the pressurized gasification of dry coal powder, the device includes an intermediate material tank for storing pulverized coal with an inert gas inlet device on a conical surface, a high-pressure pulverized coal bin connected to the bottom of the intermediate material tank by a pipeline, and the intermediate material tank is pressurized with inert gas to make the pressure in the intermediate material tank the same as the high-pressure pulverized coal bin connected to it, and then the pulverized coal is transported to the high-pressure pulverized coal bin. The above technology mainly has the following technical defects:

[0005] 1. The pressurization process requires the emission of a large amount of inert gases such as N2, CO2, etc., causing greater environmental pollution;

[0006] 2. The efficiency of the pressurized conveying process is low and cannot be continuously adjusted;

[0007] 3. Pressurized transportation requires high-pressure resistant equipment, which is large in size and expensive;

[0008] 4. High energy consumption, and high requirements on the sealing and pressure resistance of powder conveying pipelines and pipeline auxiliary parts. Summary of the invention

[0009] In order to solve the above problems, the present invention provides an annular cavity type powder pressurized conveying device, which does not need to discharge inert gas and realizes continuous conveying of powder.

[0010] To achieve the above-mentioned purpose, the annular cavity type powder pressurized conveying device of the present invention comprises an annular cavity, a normal pressure silo, a high pressure silo and a plurality of plungers, the annular cavity is provided with an inlet at the top and an outlet at the bottom, the normal pressure silo is connected with the inlet, and the high pressure silo is connected with the outlet; the plunger is placed in the annular cavity and can slide relative to the annular cavity, and a plurality of the plungers are connected in sequence by a traction rope to form a ring; when the traction rope between two adjacent plungers is in a tensioned state, a accommodating space for storing powder is formed between the two adjacent plungers; the high pressure silo is provided with a toggle mechanism for driving the plunger to slide in the annular cavity.

[0011] Preferably, the inlet and the outlet divide the annular cavity into a first semi-annular chamber and a second semi-annular chamber. In the first semi-annular chamber, the plunger slides from the inlet to the outlet, and in the second semi-annular chamber, the plunger slides from the outlet to the inlet. The traction rope between two adjacent plungers in the first semi-annular chamber is in a tensioned state; the traction rope between two adjacent plungers in the second semi-annular chamber is in a relaxed state and the plungers are pressed against each other.

[0012] Preferably, grooves capable of accommodating the traction rope are respectively formed at both ends of the plunger.

[0013] Preferably, the toggle mechanism comprises a toggle rod and a driving mechanism for driving the toggle rod to rotate, and the plunger is provided with a toggle groove capable of cooperating with the end of the toggle rod.

[0014] Preferably, a sealing ring for sealing with the annular cavity is provided on the plunger.

[0015] Preferably, the number of the sealing rings is more than two.

[0016] Preferably, the annular cavity is formed by bending a round tube.

[0017] Compared with the existing pulverized coal pressure conveying device, the annular cavity type powder pressure conveying device of the present invention has low pressure resistance to the conveying path, low energy consumption, and reduces the equipment size, reduces the equipment cost, and avoids the emission of inert gas. Through the annular cavity type powder pressure conveying device of the present invention, continuous conveying of powder is achieved, energy consumption is reduced, and the emission of inert gas is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the annular cavity type powder pressurized conveying device of the present invention;

[0019] Figure 2 is a schematic diagram of the connection between two adjacent plungers, wherein the traction rope is in a tensioned state;

[0020] Figure 3 for Figure 2 A cross-sectional view of

[0021] Figure 4 is a schematic diagram of the connection between two adjacent plungers, wherein the traction rope is in a relaxed state;

[0022] Figure 5 To display Figure 1 A partial enlarged view of the middle toggle mechanism driving the plunger to slide. DETAILED DESCRIPTION

[0023] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] like Figures 1 to 5 As shown, the annular cavity type powder pressurized conveying device of the present invention comprises an annular cavity 10, a normal pressure silo 30, a high pressure silo 40 and a plurality of plungers 20. The annular cavity 10 is provided with an inlet 11 at the upper portion and an outlet 12 at the lower portion. The normal pressure silo 30 is connected to the inlet 11, and the high pressure silo 40 is connected to the outlet 12.

[0025] The plunger 20 is placed in the annular cavity 10 and can slide relative to the annular cavity 10. A plurality of the plungers 20 are connected in sequence by a traction rope 50 to form a ring. In this way, there are a plurality of plungers 20 in the annular cavity 10, which can move along the guide of the annular cavity 10, and the plungers 20 are connected by traction ropes 50.

[0026] When the traction rope 50 between two adjacent plungers 20 is in a tensioned state, a containing space 13 for storing powder is formed between the two adjacent plungers 20. The powder enters the containing space 13 between the plungers from the inlet 11 in the normal pressure silo 30 due to gravity, and the powder in the containing space 13 moves in the annular cavity 10 with the plunger 20 until it moves to the outlet 12, and the powder enters the high-pressure silo 40 again under the action of gravity, and the powder in the containing space 13 is replaced by the high-pressure gas in the high-pressure silo 40.

[0027] The high-pressure silo 40 is provided with a toggle mechanism 60 for driving the plunger 20 to slide in the annular cavity 10. The toggle mechanism 60 is a power mechanism for the movement of the plunger 20. When a plunger 20 reaches the outlet 12, the toggle mechanism 60 drives the plunger 20 to move. After moving a certain distance, the plunger 20 stops moving, and then the toggle mechanism 60 drives the next plunger to move, and the cycle continues.

[0028] The inlet 11 and the outlet 12 divide the annular chamber 10 into a first semi-annular chamber and a second semi-annular chamber. In the first semi-annular chamber, the plunger 20 slides from the inlet 11 to the outlet 12, and in the second semi-annular chamber, the plunger 20 slides from the outlet 12 to the inlet 11. The traction rope 50 between two adjacent plungers 20 in the first semi-annular chamber is in a tensioned state; the traction rope 50 between two adjacent plungers 20 in the second semi-annular chamber is in a relaxed state and the plungers 20 are against each other. The inlet 11 and the outlet 12 are located in the first semi-annular chamber. When the toggle mechanism 60 drives one of the plungers 20 to move, the plunger 20 in the first semi-annular chamber moves synchronously by the pulling force of the traction rope 50, and the plunger 20 in the second semi-annular chamber moves from the outlet 12 to the inlet 11 by the pushing action between the plungers 20.

[0029] The two ends of the plunger 20 are respectively provided with grooves 21 capable of accommodating the traction rope 50. The traction rope 50 between the plungers 20 in the second semi-ring chamber can be accommodated in the grooves 21.

[0030] The toggle mechanism 60 includes a toggle rod 61 and a driving mechanism 62 for driving the toggle rod 61 to rotate. The plunger 20 is provided with a toggle groove 22 that can cooperate with the end of the toggle rod 61. When the toggle rod 61 rotates, the end of the toggle rod 61 can be inserted into the toggle groove 22 and push the plunger 20 to move. The plunger 20 pushes the previous plunger and pulls the next plunger to the position of the plunger 20, so that the toggle rod 61 can drive the next plunger in the same way after it rotates. Figure 5 The figure shows a preferred embodiment of the toggle mechanism of the present invention. The toggle mechanism 60 may also adopt other existing mechanisms capable of driving the plunger 20 to move.

[0031] The plunger 20 is provided with a sealing ring 23 for sealing with the annular cavity 10. The number of the sealing rings 23 is more than two, preferably two, which are respectively provided at both ends of the plunger 20.

[0032] The annular cavity 10 is formed by bending a round tube. Except for being connected to the normal pressure silo 30 and the high pressure silo 40, other parts of the annular cavity 10 are not connected to the external environment.

[0033] In the annular cavity type powder pressurized conveying device of the present invention, the powder enters the accommodation space 13 between two adjacent plungers 20 from the inlet 11 from the atmospheric pressure silo 30 due to the action of gravity, and the powder in the accommodation space 13 is moved in the annular cavity 10 by the plunger 20. Figure 110, and the powder enters the high-pressure silo 40 again under the action of gravity, and the powder in the accommodating space 13 is replaced by the high-pressure gas in the high-pressure silo 40. The plunger at the outlet 12 is driven by the toggle 60 to push the plunger in the second semi-annular chamber to move, and at the same time drives the plunger in the first semi-annular chamber forward. At this time, the plunger at the inlet 11 is pulled so that the two plungers near the inlet 11 are pulled apart to form an accommodating space 13, and the powder enters the accommodating space 13 from the atmospheric pressure silo 30. The powder moves gradually in the annular cavity 10 with the plunger 20. As the plunger 20 circulates in the annular cavity 10, the powder can be transported from the atmospheric pressure silo 30 to the high-pressure silo 40.

[0034] As mentioned above, the exemplary embodiments of the present invention are described in detail with reference to the accompanying drawings. It should be understood that the present invention is not intended to limit the scope of protection of the present invention by these specific details. Without departing from the spirit and scope of the present invention, the structure and features of the exemplary embodiments may be changed to be equivalent or similar, and these changes will also fall within the scope of protection determined by the claims attached to the present invention.

Claims

1. A ring cavity type powder pressurized conveying device, characterized in that: It includes an annular cavity, a normal pressure silo, a high pressure silo and several plungers. The annular cavity is provided with an inlet at the upper part and an outlet at the lower part, the normal pressure silo is connected with the inlet, and the high pressure silo is connected with the outlet; The plunger is placed in the annular cavity and can slide relative to the annular cavity, and a plurality of the plungers are connected in sequence by a traction rope to form a ring; When the traction rope between two adjacent plungers is in a tensioned state, a containing space capable of storing powder is formed between the two adjacent plungers; The high-pressure silo is provided with a toggle mechanism for driving the plunger to slide in the annular cavity; The inlet and the outlet divide the annular chamber into a first semi-annular chamber and a second semi-annular chamber. In the first semi-annular chamber, the plunger slides from the inlet to the outlet, and in the second semi-annular chamber, the plunger slides from the outlet to the inlet. The traction rope between two adjacent plungers in the first semi-annular chamber is in a tensioned state; the traction rope between two adjacent plungers in the second semi-annular chamber is in a relaxed state, and the plungers are in contact with each other. The toggle mechanism comprises a toggle rod and a driving mechanism for driving the toggle rod to rotate, and the plunger is provided with a toggle groove which can cooperate with the end of the toggle rod.

2. The annular cavity type powder pressurized conveying device according to claim 1, characterized in that: Both ends of the plunger are respectively provided with grooves capable of accommodating the traction rope.

3. The annular cavity type powder pressurized conveying device according to claim 1, characterized in that: The plunger is provided with a sealing ring for sealing with the annular cavity.

4. The annular cavity type powder pressurized conveying device according to claim 3, characterized in that: The number of the sealing rings is more than two.

5. The annular cavity type powder pressurized conveying device according to claim 1, characterized in that: The annular cavity is formed by bending a round tube.

Images