CN220541121U

CN220541121U - Coal slime blending combustion system

Info

Publication number: CN220541121U
Application number: CN202322211144.9U
Authority: CN
Inventors: 毕晓峰; 高源�; 郭庆江; 张福军; 韩浩; 孙秋月; 王博; 张威; 刘翠; 杜军; 梁超; 刘丽英
Original assignee: TENGZHOU FUYUAN LHV FUEL THERMOELECTRICITY CO Ltd
Current assignee: TENGZHOU FUYUAN LHV FUEL THERMOELECTRICITY CO Ltd
Priority date: 2023-08-17
Filing date: 2023-08-17
Publication date: 2024-02-27
Anticipated expiration: 2033-08-17

Abstract

The coal slime mixing and burning system comprises a coal slime conveying pipeline, a coal slime pump, a pressure gauge and a control valve, wherein the coal slime conveying pipeline comprises a pipeline A and a pipeline B which are arranged at intervals; the pipeline A and the pipeline B are respectively provided with a coal slime pump; a pressure supplementing pipeline is connected between the pipeline A and the pipeline B through a three-way valve, and a communication valve is arranged on the pressure supplementing pipeline; the pipeline A and the pipeline B are respectively provided with a stop valve; and the pipeline A and the pipeline B are also respectively provided with a pressure gauge and a flowmeter. Compared with the design of the coal slime mixing and burning anti-clogging in the prior art, the utility model is more reasonable, can ensure continuous transportation of coal flows, can perform high-pressure flushing and clogging by utilizing the mutually-prepared pipelines, is particularly suitable for continuous production sections such as thermal power plants, and has high safety popularization value.

Description

Coal slime blending combustion system

Technical Field

The utility model relates to the field of coal slime co-firing, in particular to a coal slime co-firing system.

Background

The blending combustion of the coal slime can greatly ensure the production benefit and avoid the resource waste. However, the pipeline blockage phenomenon exists in the coal slime blending process, namely the pipeline conveying process, and thus the running power of the unit is influenced.

In order to solve the above problems, the most common treatment mode in the prior art is to add a scraper or a sieve plate in a coal slime conveying pipeline, such as a coal slime anti-blocking device disclosed in chinese patent CN201620715303.6, but in the actual operation process, the anti-blocking effect of the device on a pipeline is not good, especially when the pipeline is blocked, the re-communication difficulty is also improved after the flux is reduced. In another example, chinese patent CN201820511554.1 discloses a blocking-preventing device for coal slime in a circulating fluidized bed boiler, the device adds a high-pressure water pipeline for preventing clogging, and adopts a form of auger conveying, but the auger conveying can affect internal pressure transmission of the pipeline, and further affect coal flow injection, and the high-pressure water pipeline has an excellent effect of cleaning the blockage of the coal slime, but is not suitable for working equipment for continuous production such as a thermal power plant for a long time. In view of the above problems, there is currently no corresponding solution.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and provides a coal slime mixing and burning system which is mutually prepared through multi-pipeline interconnection, ensures coal flow conveying efficiency, can be adjusted immediately after a clogging condition occurs in the operation process, is self-dredged by utilizing high-pressure coal flow, is particularly suitable for continuous production operation, and is safe and reliable to operate.

The coal slime mixing and burning system comprises a coal slime conveying pipeline, a coal slime pump, a pressure gauge and a control valve;

the coal slime conveying pipeline comprises a pipeline A and a pipeline B which are arranged at intervals;

the pipeline A and the pipeline B are respectively provided with a coal slime pump;

a pressure supplementing pipeline is connected between the pipeline A and the pipeline B through a three-way valve, and a communication valve is arranged on the pressure supplementing pipeline;

the pipeline A and the pipeline B are respectively provided with a stop valve;

and the pipeline A and the pipeline B are also respectively provided with a pressure gauge and a flowmeter.

Preferably, the pressure gauge is arranged on a pipeline at the position of the inlet nozzle, and the flowmeter is arranged at the rear part of the pressure gauge.

That is, if the flux of the pipeline A is reduced through the monitoring of the pressure gauge and the flowmeter, after the boiler is complemented with heat, the stop valve on the pipeline B is closed before the full power transmission of the mixed combustion of the coal slime, the communication valve is opened to transmit the coal flow into the pipeline A by using the double-coal slime pump, the communication valve is reset under the driving of the high-pressure coal flow, and the stop valve is opened after the reset, so that the communication valve is connected;

example 1: referring to figure 2 of the drawings, two communicating valves are arranged at intervals, an air compressing pipeline is arranged between the two communicating valves through three-way connection, and the tail end pipeline of the air compressing pipeline is connected with an air pump.

The effect that this realized is that the pipeline internal pressure is further improved to the rethread in-process, makes the coal flow pass through fast and improves rethread efficiency, plays the effect that prevents the coal slime backlog in the pressure compensating pipeline simultaneously.

In the embodiment 2, referring to fig. 2 of the drawings in the specification, the coal slime conveying pipeline, the coal slime pump, the pressure gauge and the control valve form a single unit, and at least two single units are arranged on a single boiler; the pipeline A and the pipeline B in the single unit form interconnection and mutual backup, the mutual dredging effect is achieved, and the interconnection and mutual backup between the double units are realized by relatively mixing and burning the boiler slime.

The effect of realizing with this is that guarantee coal slime conveying efficiency, further improves and carries safety and also is convenient for not stopping maintenance simultaneously.

Preferably, a communicating pipe is arranged between the air compression pipelines of the double units, and an air valve is arranged on the communicating pipe. The effect achieved by the method is that the double air pumps are mutually connected and mutually prepared.

The beneficial effects of the utility model are as follows: compared with the design of the coal slime mixing and burning anti-clogging in the prior art, the utility model is more reasonable, can ensure continuous transportation of coal flows, can perform high-pressure flushing and clogging by utilizing the mutually-prepared pipelines, is particularly suitable for continuous production sections such as thermal power plants, and has high safety popularization value.

Drawings

FIG. 1 is a schematic diagram of a coal slurry blending combustion system according to the present utility model;

FIG. 2 is a schematic diagram of an embodiment 1 of a slurry blending system according to the present utility model;

FIG. 3 is a schematic diagram of an embodiment 2 of a slurry blending system according to the present utility model;

reference numerals:

1-coal slime pump 2-communicating valve 3-pressure supplementing pipeline 4-pipeline A5-pipeline B6-stop valve 7-pressure gauge 8-flowmeter 9-air pump 10-air compressing pipeline 11-air valve 12-communicating pipe

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

Referring to fig. 1, 2 and 3, the coal slime co-firing system of the present utility model includes a coal slime conveying pipeline, a coal slime pump 1, a pressure gauge 7 and a control valve;

the coal slime conveying pipeline comprises a pipeline A4 and a pipeline B5, and the pipeline A4 and the pipeline B5 are arranged at intervals;

the pipeline A4 and the pipeline B5 are respectively provided with a slime pump 1;

a pressure supplementing pipeline 3 is connected between the pipeline A4 and the pipeline B5 through a three-way valve, and a communication valve 2 is arranged on the pressure supplementing pipeline 3;

the pipeline A4 and the pipeline B5 are respectively provided with a stop valve 6;

the pipeline A4 and the pipeline B5 are also respectively provided with a pressure gauge 7 and a flowmeter 8.

Preferably, the pressure gauge 7 is arranged on the pipeline at the position of the inlet nozzle, and the flow meter 8 is arranged at the rear part of the pressure gauge 7.

That is, if the flux of the pipeline A4 is reduced through the monitoring of the pressure gauge 7 and the flowmeter 8, after the boiler is complemented with heat, the stop valve 6 on the pipeline B5 is closed before the full power of the mixed combustion of the coal slime is conveyed, the communication valve 2 is opened to convey the coal flow into the pipeline A4 by using the dual-coal slime pump 1, the communication valve is reset under the driving of the high-pressure coal flow, and the stop valve 6 is opened after the reset, and the communication valve 2 is closed;

example 1: referring to fig. 2 of the specification and drawings, two communication valves 2 are arranged at intervals, an air compression pipeline 10 is arranged between the two communication valves 2 through three-way connection, and a tail end pipeline of the air compression pipeline 10 is connected with an air pump 9.

The effect that realizes with this is that the in-process of recanalizing further improves the pipeline internal pressure, makes the coal current pass through fast and improves the recanalization efficiency, plays the effect that prevents the coal slime backlog in the pressure compensating pipeline 3 simultaneously.

In the embodiment 2, referring to fig. 2 of the drawings in the specification, the coal slime conveying pipeline, the coal slime pump 1, the pressure gauge 7 and the control valve form a single unit, and at least two single units are arranged on a single boiler; namely, the pipeline A4 and the pipeline B5 in the single unit form interconnection and mutual backup, the mutual dredging effect is achieved, and the interconnection and mutual backup between the double units and the boiler coal slime are realized relatively.

Preferably, a communicating pipe 12 is arranged between the air compressing pipelines 10 of the double units, and an air valve 11 is arranged on the communicating pipe 12. The effect achieved in this way is that the double air pumps 9 are interconnected and mutually reserved.

While the fundamental and principal features of the utility model and advantages of the utility model have been shown and described, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The utility model provides a coal slime blending system, includes coal slime conveying line, coal slime pump, manometer and control valve, its characterized in that: the coal slime conveying pipeline comprises a pipeline A and a pipeline B which are arranged at intervals;

the pipeline A and the pipeline B are respectively provided with a stop valve;

2. The coal slime co-firing system according to claim 1, wherein two communicating valves are arranged at intervals, an air compressing pipeline is arranged between the two communicating valves through three-way connection, and a tail end pipeline of the air compressing pipeline is connected with an air pump.

3. The slime co-firing system according to claim 1, wherein the slime conveying pipeline, the slime pump, the pressure gauge and the control valve form a single unit, and at least two single units are arranged on the single boiler.