CN222974414U

CN222974414U - A screw conveying device and coal gasification system

Info

Publication number: CN222974414U
Application number: CN202421894368.2U
Authority: CN
Inventors: 周子豪; 吴玉莹; 马广苗
Original assignee: Keda Clean Energy Co Ltd
Current assignee: Keda Clean Energy Co Ltd
Priority date: 2024-08-06
Filing date: 2024-08-06
Publication date: 2025-06-13
Anticipated expiration: 2034-08-06

Abstract

The utility model discloses a screw conveying device and a coal gasification system, and belongs to the technical field of coal gasification equipment. The screw conveying device of the utility model includes a screw conveyor and a storage hopper that are interconnected, and the storage hopper is connected to the screw conveyor through a buffer pipe; the buffer pipe is provided with two plug valves distributed up and down, and a storage space is formed between the two plug valves, and the two plug valves are opened alternately to control the amount of material entering the screw conveyor each time. The utility model can relatively accurately control the amount of material entering the screw conveyor by controlling the opening frequency of the upper and lower plug valves, so as to prevent the material from piling up at the feed port of the screw conveyor waiting for transportation, so that the material can enter the screw conveyor more evenly and orderly, thereby effectively preventing the occurrence of blockage.

Description

Screw conveying device and coal gasification system

Technical Field

The utility model belongs to the technical field of coal gasification equipment, and particularly relates to a spiral conveying device and a coal gasification system.

Background

Screw conveyor is a common material conveying device, which uses screw blades to push materials, and is mainly used for conveying powdery, fine-grained and other bulk materials such as cement, fly ash, mineral powder and the like. One side of the feeding pipe is provided with a feeding hopper, the other side of the feeding pipe is provided with a discharging hole, and the material is pushed by the screw shaft to gradually move after entering the feeding pipe until being discharged from the discharging hole.

In practical use, it is found that the material is often blocked during the conveying process of the screw conveyor, which can lead to the screw conveyor being internally crowded with material, the screw blades being overloaded, and in severe cases causing damage to the motor and the screw blades. Therefore, how to avoid the stacking phenomenon of the screw conveyor at the feed inlet so as to improve the risk of blocking has important production practice significance.

In the patent of CN205221860U, a jam-proof screw feeder is disclosed. The novel rotary type rotary drill bit comprises a machine shell, a feed inlet and a discharge outlet, wherein the feed inlet and the discharge outlet are formed in the machine shell and are respectively located at the upper side and the lower side of two ends of the machine shell in the axial direction, a spiral driving shaft is arranged in the machine shell, spiral blades are arranged on the spiral driving shaft, one end of the discharge outlet of the spiral driving shaft is provided with thrust blades, one end of the feed inlet of the machine shell is connected with a coupler, a speed reducer and a motor, the screw pitch of the spiral blades is gradually increased from the feed inlet to the discharge outlet, and a feed outlet is formed in the machine shell on one side corresponding to the discharge outlet. The pitch of the blades of the feeding port end is kept unchanged, the pitch of the blades from the back to the discharging end is increased, and on the premise that the original conveying capacity of the feeder is unchanged, the conveying resistance of equipment is reduced, and the condition of blocking is effectively prevented.

CN113353562a discloses a blocking remover for screw conveyor. In the application, the blanking pipe comprises a blanking pipe and a conveying assembly, wherein a pneumatic gate valve and an external air source are arranged on the blanking pipe, a blocking cleaning assembly is arranged on the conveying assembly, an air inlet pipe is arranged on one side of the blocking cleaning assembly, the air inlet pipe is connected with the air source, valves are respectively arranged between the air source and the pneumatic gate valve as well as between the air source and the air inlet pipe, the blocking cleaning assembly comprises an installation pipe connected with the conveying assembly and an installation head with a filter screen, the installation head is connected with the installation pipe, and the filter screen is positioned inside the conveying assembly. When screw conveyer takes place to block up, use through pneumatic push-pull valve and conveying component cooperation, in time quick clearance is carried out to the material of through-hole department, makes the material suspension in the casing behind the clear stifled, has improved material transfer's security and conveying efficiency, reduces because blocked the probability that causes screw conveyer to break down or destroy.

The above-mentioned application has solved the problem that screw conveyer takes place the putty from different angles, but has not solved the problem of putty from the source. This is because in many coal gasification system designs, the coal silo is directly connected to the feed inlet of the screw conveyor. And a large amount of coal powder is accumulated and is waiting to be conveyed at the inlet of the screw conveyor, so that the conveying pressure of the screw conveyor is overlarge, and the phenomena of blocking and even damage to a motor and screw blades are easily caused.

Disclosure of utility model

1. Problems to be solved

Aiming at least some problems in the prior art, the utility model provides a screw conveying device and a coal gasification system, wherein a material storage space is formed between two gate valves, so that the amount of materials entering a screw conveyor can be accurately controlled, and the phenomenon of material blockage can be effectively prevented.

2. Technical proposal

In order to solve the problems, the technical scheme adopted by the utility model is as follows:

The utility model relates to a screw conveying device, which comprises a screw conveyor and a storage hopper which are communicated with each other, wherein the storage hopper is communicated with the screw conveyor through a buffering pipeline;

Two gate valves are arranged in the material buffering pipeline in an up-down distribution mode, a material storage space is formed between the two gate valves, and the two gate valves are opened alternately to control the amount of materials entering the spiral conveyor every time.

Further, the gate valve is obliquely arranged, and the inclination angle is 5-20 degrees.

Further, the gate valve positioned below is arranged near the joint between the buffer pipeline and the screw conveyor.

Further, the gate valve is made of high-temperature resistant materials, and one side, facing the storage hopper, of the gate valve located above is made of wear-resistant materials.

Further, the upper surface that is located upper gate valve is equipped with and is the comb material portion of vertical setting, and this comb material portion is close to the tip setting of gate valve, and this comb material portion distributes along the width direction of gate valve has a plurality ofly.

Further, the comb part is integrally in a conical structure with a small upper part and a large lower part, and is rotatably arranged on the gate valve.

Further, a sliding groove for sliding the gate valve is formed in the inner wall of the buffer pipeline, and the gate valve is connected with a driving source for driving the gate valve to slide back and forth along the sliding groove.

Furthermore, the whole buffering pipeline is of a conical structure with a big top and a small bottom, and two ends of the buffering pipeline are detachably connected with the spiral conveyor and the storage hopper through flanges.

The utility model also provides a coal gasification system which comprises a gasification furnace and coal powder conveying equipment, wherein the coal powder conveying equipment is the spiral conveying device, and a discharge port of the spiral conveying device is connected with a feed port of the gasification furnace through a chute.

3. Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that:

(1) According to the spiral conveying device, the two gate valves are distributed up and down in the buffer pipeline, a storage space is formed between the two gate valves, the two gate valves are opened alternately, and the opening frequency of the upper gate valve and the lower gate valve is controlled, so that the amount of materials entering the spiral conveyor can be controlled relatively accurately, the materials are prevented from being accumulated at the feeding hole of the spiral conveyor and waiting for conveying, and the materials can enter the spiral conveyor more uniformly and orderly, and therefore blocking phenomenon can be prevented effectively.

(2) According to the spiral conveying device, through the inclined arrangement of the gate valve, friction resistance between the gate valve and materials can be effectively reduced, so that the plug-in action of the gate valve is more flow, and meanwhile, the top surface of the gate valve above has larger pressure, so that loss is serious, and the surface can be made of wear-resistant materials, so that the whole service life of the gate valve can be ensured.

(3) According to the spiral conveying device, through the arrangement of the material combing part, the material combing part can synchronously reciprocate along with the gate valve, and when the gate valve is opened, a certain dredging effect can be achieved on materials above the gate valve, so that the smoothness of discharging is guaranteed.

Drawings

FIG. 1 is a schematic view of a coal gasification system according to the present utility model;

FIG. 2 is a schematic diagram showing the distribution of the valve of the orifice insert of the relief pipeline according to the present utility model.

In the figure, 1, a screw conveyor, 2, a storage hopper, 3, a buffer pipeline, 4, a gate valve, 5, a comb part, 6, a chute and 7, and a gasification furnace.

Detailed Description

For a further understanding of the present utility model, the present utility model will be described in detail with reference to the drawings.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model is further described below in connection with specific embodiments.

As shown in fig. 1 and 2, a screw conveyor device of the present embodiment includes a screw conveyor 1 and a hopper 2. Wherein, the screw conveyor 1 and the storage hopper 2 are communicated and connected through a material slowing pipeline 3. Meanwhile, two gate valves 4 are distributed up and down in the material slowing pipeline 3, a certain amount of storage space is formed between the two gate valves 4, and opening and closing actions of the two gate valves 4 are sequentially carried out, so that the amount of materials entering the screw conveyor 1 each time is controlled.

Specifically, the whole buffering pipeline 3 is in a conical structure with a large upper part and a small lower part, and two ends of the buffering pipeline 3 are detachably connected with the screw conveyor 1 and the storage hopper 2 respectively through respective flanges, so that the whole conveying assembly operation, the later maintenance and overhaul operation are facilitated. Meanwhile, a sealing ring is arranged at the corresponding flange connection part so as to ensure the sealing performance in the whole flow pipeline.

The gate valve 4 may be made of a high temperature resistant material, and the gate valve 4 is connected with a driving source for opening and closing. Preferably, the driving source may be directly disposed on the outer peripheral wall of the relief pipe 3, which may be a cylinder, an oil cylinder, an electric push rod, or the like. Meanwhile, a sliding groove for the gate valve 4 to slide back and forth is formed in the inner wall of the slow pipeline 3, so that the stability of the gate valve 4 in back and forth movement is ensured.

In addition, the gate valve 4 positioned below is arranged near the joint between the buffer pipeline 3 and the screw conveyor 1, so that the accumulation space of materials between the gate valve 4 and the feed inlet of the screw conveyor 1 is reduced. After the lower gate valve 4 is opened, the materials in the storage space can directly enter the screw conveyor 1, so that the smoothness of feeding is prevented from being influenced due to overlarge accumulation space.

The top surface of the gate valve 4 above has larger pressure from materials, so that the gate valve is seriously worn in the moving process. Therefore, the surface can be made of wear-resistant materials, and the whole service life of the gate valve 4 can be ensured.

The spiral conveying device is characterized in that materials flow into a material buffering pipeline 3 from a material storage hopper 2, at the moment, a gate valve 4 positioned above is in an open state, a gate valve 4 positioned below is in a closed state, then the upper gate valve 4 is closed to prevent feeding, so that a material storage space between the two gate valves 4 is filled with the materials, then the lower gate valve 4 is opened, and the materials in the material storage space enter the spiral conveying machine 1 to finish one-time feeding operation. And simultaneously, the feeding speed of the materials can be controlled by controlling the opening and closing frequency of the upper gate valve and the lower gate valve.

In this embodiment, one end of the gate valve 4 is located in the relief pipeline 3, and the other end is located outside the relief pipeline 3. For convenience of the following description, the end of the gate valve 4 located outside the buffer tube 3, i.e., the end connected to the driving source, is denoted as a connection end, and the end located inside the buffer tube 3 is denoted as a free end.

As shown in fig. 2, as a preferred embodiment of the gate valve 4, the gate valve 4 is disposed in a downward inclined manner horizontally as a whole, i.e., the free end of the gate valve 4 is lower than the connecting end. Through the inclined arrangement of the gate valve 4, on one hand, the resistance of the gate valve 4 in the moving process can be reduced, and on the other hand, the materials piled above the gate valve 4 are distributed in an inclined manner, and the discharging operation of the materials is also facilitated. Preferably, the angle of inclination of the gate valve 4 is 5 ° -20 °, for example, 5 °, 10 °, 15 °, 20 °, etc.

Further, a comb part 5 for dredging accumulated materials on the upper part of the gate valve 4 is arranged on the upper surface of the upper gate valve 4 so as to accelerate the discharging of the materials and prevent the blocking.

Specifically, the comb part 5 is in a conical structure with a small upper part and a large lower part, and the comb part 5 is vertically arranged at the free end close to the gate valve 4, so that interference between the comb part 5 and the inner wall of the slow pipeline 3 when the gate valve 4 is opened is reduced as much as possible. Meanwhile, in order to further improve the material-thinning effect, the material-thinning portion 5 may be distributed in plurality along the width direction of the gate valve 4.

The above-mentioned "vertical arrangement" does not refer to a strict 90-degree arrangement, and only the entire tip portion of the comb portion 5 is inclined upward, so that the effect of dredging is achieved. Meanwhile, the direction in which the gate valve 4 moves back and forth is referred to as the length direction, and the direction perpendicular to the direction of movement is referred to as the width direction.

Due to the comb 5, the friction resistance of the gate valve 4 during movement is increased. For this reason, in this embodiment, the comb portion 5 is rotatably disposed on the gate valve 4, for example, connected by a bearing, so that the comb portion 5 can rotate during the movement of the gate valve 4 to reduce friction resistance, and meanwhile, the rotation of the comb portion 5 is beneficial to improving the material-thinning effect.

In this embodiment, through the setting of comb material portion 5, this comb material portion 5 can carry out synchronous reciprocating motion along with push-pull valve 4, when push-pull valve 4 opens, can play certain dredging effect to the material of push-pull valve 4 top, is favorable to guaranteeing the smoothness nature of unloading.

In addition, in the present embodiment, a coal gasification system is provided, which includes the gasification furnace 7 and the screw conveyor described above. Wherein, a chute 6 is arranged at the discharge port of the screw conveyor 1, and is in sealing connection with the feed port of the gasification furnace 7 through the chute 6.

According to the coal gasification system of the embodiment, the pneumatic double-layer gate valve 4 is added between the outlet of the slow pipeline 3 and the inlet of the screw conveyor 1, and the opening frequency of the upper gate valve 4 and the lower gate valve 4 can be adjusted according to the site conditions, so that before coal dust (coal dust) in the slow pipeline 3 flows into the screw conveyor 1, the coal dust (coal dust) needs to enter a storage space formed by the two gate valves 4, and then enters the screw conveyor 1 to be conveyed into the gasification furnace 7. Since the volume of the storage space is constant, the amount of material that enters the screw conveyor 1 once can be regarded as a fixed amount. And then the feeding rate can be controlled by combining the opening frequency of the gate valve 4, so that the condition that a large amount of materials are piled up at the feeding port of the screw conveyor 1 and waiting for conveying is avoided, the materials can enter the screw conveyor 1 more uniformly and orderly, and the blocking phenomenon can be effectively prevented. Meanwhile, as the two gate valves 4 are alternately opened, the sealing effect in the storage hopper 2 can be effectively ensured, and the phenomenon of material channeling caused by unbalanced pressure is prevented.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims

1. The spiral conveying device comprises a spiral conveyor (1) and a storage hopper (2) which are communicated with each other, and is characterized in that the storage hopper (2) is communicated with the spiral conveyor (1) through a slow pipeline (3);

Two gate valves (4) are arranged in the material slowing pipeline (3) in an up-down distribution mode, a material storage space is formed between the two gate valves (4), and the two gate valves (4) are alternately opened to control the amount of materials entering the spiral conveyor (1) each time.

2. A screw conveyor according to claim 1, wherein the gate valve (4) is inclined at an angle of 5-20 degrees.

3. A screw conveyor according to claim 2, characterized in that the gate valve (4) located below is arranged close to the junction between the buffer conduit (3) and the screw conveyor (1).

4. A screw conveyer according to any one of claims 1-3, wherein the gate valve (4) is made of a high temperature resistant material, and the side of the gate valve (4) above the gate valve facing the storage hopper (2) is made of a wear resistant material.

5. The screw conveyor according to claim 1, wherein the upper surface of the upper gate valve (4) is provided with vertically arranged comb parts (5), the comb parts (5) are arranged near the end parts of the gate valve (4), and the comb parts (5) are distributed along the width direction of the gate valve (4).

6. The screw conveyor according to claim 5, wherein the comb part (5) has a tapered structure with a smaller top and a larger bottom, and the comb part (5) is rotatably disposed on the gate valve (4).

7. The screw conveyor device according to claim 5, wherein a chute for sliding the gate valve (4) is formed in the inner wall of the buffer pipeline (3), and the gate valve (4) is connected with a driving source for driving the gate valve to slide back and forth along the chute.

8. The screw conveyor device according to claim 4, wherein the buffer pipeline (3) is integrally in a conical structure with a large upper part and a small lower part, and two ends of the buffer pipeline are detachably connected with the screw conveyor (1) and the storage hopper (2) through flanges.

9. A coal gasification system comprises a gasification furnace (7) and coal dust conveying equipment, and is characterized in that the coal dust conveying equipment is a spiral conveying device according to any one of claims 1-8, and a discharge port of the spiral conveyor (1) is connected with a feed port of the gasification furnace (7) through a chute (6).