CN206289222U - Fluidized gasification system separates dross coal and crushes recycling gasification installation - Google Patents

Abstract

The fluidized bed gasification system separates slag coal, pulverizes and recirculates the gasification device, including: gasifier, cyclone separator, and screw conveying pulverizer. There is a slag coal tank at the bottom of the gasifier; the screw conveyor pulverizer is set at the lower part of the slag coal tank, and its inlet is connected with the slag coal tank at the bottom of the gasifier, and its outlet is connected in parallel with the flow pipe of the gasification agent inlet at the bottom of the gasifier Above; the bottom of the cyclone separator is provided with a slag coal gathering hopper, and a pipeline is provided between the slag coal gathering hopper and the entrance of the screw conveying pulverizer, and the slag coal gathering bucket at the bottom of the cyclone separator and the entrance of the screw conveying pulverizer pass through the The pipes are connected. In the utility model, the high-temperature materials separated by the cyclone separator in the traditional coal gas circulating fluidized bed gasification system are not directly returned to the gasification furnace for gasification and recirculation, but are first sent into the screw conveying pulverizer, and the The slag coal is pulverized and then returned to the gasifier for gasification, which makes the pulverized slag coal easier to fully burn and more conducive to complete gasification, thereby achieving the purpose of increasing the coal gasification rate.

Description

Fluidized bed gasification system separation slag coal crushing recirculation gasification device

technical field

The utility model relates to a slag coal recirculation gasification device in a fluidized bed gasification system, in particular to a slag coal separated by a cyclone separator in a fluidized bed gasification system for crushing and recirculating gasification The device belongs to the technical field of coal gasification.

Background technique

The cyclone separator is one of the important circulating gasification equipment in the coal-to-gas circulating fluidized bed gasification system. The high-temperature material that comes down is directly returned to the furnace for cyclic gasification, and the unreacted carbon in the circulating material further undergoes gasification reaction with the gasification agent in the hearth of the gasification furnace to increase the conversion rate of carbon during the gasification process. Obviously, the recycled gasification of the slag coal separated by the cyclone separator plays a role in increasing the gasification rate of coal. However, in practical applications, although the high-temperature material separated by the cyclone separator returns to the furnace for further gasification, due to the The exhausted slag coal particles are relatively large, but there is still a part of it that cannot be completely burned out and is not completely gasified to be discharged and discarded. Therefore, the circulation gasification device in the traditional coal-to-fluidized bed gasification system has the disadvantages of incomplete circulation gasification, low thermal energy utilization rate of raw coal, and insufficient coal gasification rate.

Contents of the invention

Aiming at the technical deficiencies of the circulating gasification device in the traditional coal-to-gas circulating fluidized bed gasification system, the utility model provides a fluidized bed gasification system separation slag coal crushing recycling gasification device to realize the improvement of coal gasification rate the goal of.

The technical solution of the utility model is: the fluidized bed gasification system separates slag coal, pulverizes and recirculates the gasification device, which includes: a gasifier, a cyclone separator, a screw conveying pulverizer, a gate valve, a sensor and a PLC programmable controller, The bottom of the gasifier is provided with a slag coal tank; the screw conveying pulverizer is arranged at the lower part of the slag coal tank, the inlet of the screw conveying pulverizer communicates with the slag coal tank at the bottom of the gasifier, and the outlet is connected in parallel at the bottom of the gasifier On the flow pipe of the gasification agent inlet; the bottom of the cyclone separator is provided with a slag coal gathering bucket, which is characterized in that:

A pipeline is arranged between the slag coal gathering bucket at the bottom of the cyclone separator and the entrance of the screw conveying pulverizer, and the slag coal gathering bucket at the bottom of the cyclone separator communicates with the entrance of the screw conveying pulverizer through the pipeline;

The pipeline connecting the slag coal gathering hopper and the inlet of the screw conveying pulverizer is provided with a sensor and a gate valve in sequence;

The sensor transmits the presence or absence of coal slag signal to the PLC programmable controller; the PLC programmable controller directs the gate valve to open and close through the electric signal.

In the utility model, the high-temperature materials separated by the cyclone separator in the traditional coal gas circulating fluidized bed gasification system are not directly returned to the gasification furnace for gasification and recirculation, but are first sent into the screw conveying pulverizer, and the The slag coal is pulverized and then returned to the gasifier for gasification, which makes the pulverized slag coal easier to fully burn and more conducive to complete gasification, thereby achieving the purpose of increasing the coal gasification rate.

The utility model has the advantages of reasonable design, simple structure, high coal gasification rate and good energy-saving effect.

Description of drawings

Accompanying drawing 1 is the structural principle schematic diagram of the utility model.

In accompanying drawing 1: 1 is a gasifier, 101 is a slag coal tank, 2 is a cyclone separator, 201 is a slag coal accumulation bucket, 3 is a screw conveyor pulverizer, 4 is a flow pipe for gasification agent inlet, 5 It is a gate valve, 6 is a sensor, and 7 is a PLC programmable controller.

detailed description

Below in conjunction with accompanying drawing, the utility model is further explained:

As shown in accompanying drawing 1, the bottom of gasifier 1 is provided with slag-coal tank 101; Connected, the outlet is connected in parallel on the flow pipe 4 of the gasification agent inlet at the bottom of the gasifier 1; the bottom of the cyclone separator 2 is provided with a slag coal gathering bucket 201, and the slag coal gathering bucket 201 and the inlet of the screw conveyor pulverizer 3 A pipeline is provided, and the slag coal gathering bucket 201 communicates with the entrance of the screw conveying pulverizer 3 through the pipeline; the pipeline connecting the slag coal gathering bucket 201 and the entrance of the screw conveying pulverizer 3 is provided with a sensor 6 and a slide valve 5 in sequence ; The sensor 6 transmits the cinder-free signal to the PLC programmable controller 7; the PLC programmable controller 7 directs the gate valve 5 to open and close through the electrical signal.

In the utility model, the high-temperature materials separated by the cyclone separator 2 in the traditional coal gas circulating fluidized bed gasification system are not directly returned to the gasification furnace 1 for gasification and recycling, but are first sent to the screw conveying pulverizer 3 Inside, the slag coal is pulverized and then returned to the gasifier 1 for gasification, so that the pulverized slag coal is easier to fully burn and more conducive to complete gasification, thereby achieving the purpose of increasing the coal gasification rate.

The utility model also arranges the sensor 6 and the plug valve 5 sequentially on the pipeline where the slag coal gathering bucket 201 communicates with the entrance of the screw conveyor pulverizer 3 . That is: the sensor 6 transmits the electrical signal that there is cinder accumulation at the contact point to the PLC programmable controller 7 to instruct the flapper valve 5 to open; the sensor 6 transmits the electrical signal that there is no cinder accumulation at the contact point to the PLC programmable controller 7 to instruct The flapper valve 5 is closed, so that the bottom of the cyclone separator 2 is always in two sealing states, one is the closed sealing state of the flapper valve 5 when there is no cinder accumulation; the other is the self-sealing state when there is cinder accumulation, so that the cyclone The high-temperature gas in the separator 2 cannot leak from the bottom.

Claims (3)

1. The fluidized bed gasification system separates slag coal crushing and recycling gasification device, including: gasifier, cyclone separator, screw conveying pulverizer, flapper valve, sensor and PLC programmable controller, the gasification A slag coal tank is provided at the bottom of the furnace; the screw conveying pulverizer is arranged at the lower part of the slag coal tank, the inlet of the screw conveying pulverizer communicates with the slag coal tank at the bottom of the gasifier, and the outlet is connected in parallel with the inlet of the gasification agent at the bottom of the gasifier. On the flow pipe; the bottom of the cyclone separator is provided with a slag coal gathering bucket, which is characterized in that: A pipeline is provided between the slag coal gathering hopper at the bottom of the cyclone separator and the inlet of the screw conveying pulverizer, and the slag coal gathering bucket at the bottom of the cyclone separator communicates with the entrance of the screw conveying pulverizer through the pipeline. 2. The fluidized bed gasification system separation slag coal pulverization recirculation gasification device according to claim 1, characterized in that: the pipeline connecting the slag coal gathering hopper and the inlet of the screw conveying pulverizer is successively provided with Sensors and flapper valves. 3. The fluidized bed gasification system separation slag coal pulverization recirculation gasification device according to claim 1 or 2, characterized in that: the sensor transmits the presence or absence of coal slag signal to the PLC programmable controller, and the PLC The programmable controller directs the gate valve to open and close through the electric signal.