CN213456301U

CN213456301U - double-U-shaped fly ash sampling device utilizing pressure difference of flue gas system

Info

Publication number: CN213456301U
Application number: CN202022652557.7U
Authority: CN
Inventors: 王宏武; 刘欢; 刘圣冠; 林琳; 井新经; 张奔; 王勇; 李杨; 周元祥; 周刚
Original assignee: Xian Thermal Power Research Institute Co Ltd; Xian Xire Energy Saving Technology Co Ltd
Current assignee: Xian Thermal Power Research Institute Co Ltd; Xian Xire Energy Saving Technology Co Ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-06-15
Anticipated expiration: 2030-11-16

Abstract

The utility model discloses a double U-shaped fly ash sampling device utilizing the pressure difference of a flue gas system, which comprises an inlet pipeline, a U-shaped sampling pipe, a U-shaped pipe and an outlet pipeline; the inlet of the inlet pipeline is connected with a vertical flue section between the economizer and the low-temperature superheater and the low-temperature reheater, and the outlet of the inlet pipeline is connected with the inlet of the U-shaped sampling pipe; the outlet of the U-shaped sampling tube is connected with the inlet of the U-shaped tube, the bottom of the U-shaped sampling tube is provided with an opening for sampling, and the opening is connected with a sampling unit; the outlet of the U-shaped pipe is connected with an outlet pipeline; the outlet of the outlet pipeline is connected with a vertical flue section between the economizer and the denitration system. The utility model discloses a flying dust sampling device simple structure, easy and simple to handle. Because the pressure difference of the flue gas system is utilized, no external equipment is needed to do work, continuous fly ash sampling can be realized in a flue gas passage formed by the double U-shaped fly ash sampling devices, stable and reliable fly ash collection can be ensured, the obtained sample has the most representativeness, and the measurement accuracy is ensured.

Description

double-U-shaped fly ash sampling device utilizing pressure difference of flue gas system

Technical Field

The utility model belongs to the technical field of electric power and power engineering, a utilize two U type flying dust sampling device of flue gas system pressure differential is related to.

Background

In the routine monitoring and testing of the fly ash combustible in the thermal power plant, the accuracy of the fly ash sampling is important to the accuracy of the testing result of the fly ash combustible. Most power plants adopt an impact type fly ash sampling device to sample fly ash on a rear tail flue of an air preheater, smoke wrapped with fly ash particles flows to the air preheater in the tail flue, the smoke and the fly ash particles impact a preset sampling device in the flue together, and the fly ash particles drop to a sampler by impact.

There are two drawbacks to afterbody flue striking formula flying dust sampling device: firstly, although the device is arranged in front of the dust remover, the sampling of the impact type fly ash in the tail flue is still representative in theory, but because the coal economizer area is also provided with the ash bucket and the bin pump, a part of large-particle fly ash is removed in the coal economizer area, and the sampling of the impact type fly ash in the tail flue is weakened. Secondly, the structure of the tail flue impact type fly ash sampling device is simple, the capturing capacity of larger fly ash particles is far higher than that of smaller fly ash particles, the sampling amount in unit time is small, and the sampling representativeness is relatively poor.

In actual production, the sampling representativeness of the impact type fly ash of the tail flue is poor, and effective guidance can not be provided for the adjustment work of operators in the production process. Therefore, it is desirable to provide a fly ash sampling device with simple structure, low manufacturing cost, easy popularization and good sampling effect.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that flying dust sampling device sampling effect is poor and the representativeness is poor, provide an utilize two U type flying dust sampling device of flue gas system pressure differential.

In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:

a double U-shaped fly ash sampling device utilizing the pressure difference of a flue gas system comprises:

the inlet of the inlet pipeline is connected to a vertical flue section between the economizer and the low-temperature superheater and between the economizer and the low-temperature reheater, and the outlet of the inlet pipeline is connected with the inlet of the U-shaped sampling pipe;

the outlet of the U-shaped sampling tube is connected with the inlet of the U-shaped tube, the bottom of the U-shaped sampling tube is provided with an opening for sampling, and the opening is connected with a sampling unit;

the outlet of the U-shaped pipe is connected with an outlet pipeline;

and the outlet of the outlet pipeline is connected with the vertical flue section between the economizer and the denitration system.

The utility model discloses further improvement lies in:

the airflow direction of the inlet of the U-shaped sampling tube is vertical to the airflow direction of the outlet of the inlet pipeline; the airflow direction of the outlet of the U-shaped pipe is vertical to the airflow direction of the inlet of the outlet pipeline.

And a flow regulating valve is arranged on the inlet pipeline.

The sampling unit comprises a sampling storage tank, the sampling storage tank is connected with an opening on the U-shaped sampling tube through a connecting tube, and a storage tank handle is arranged on the sampling storage tank.

The connecting pipe is connected with the sampling storage tank through threads.

The inlet pipeline, the U-shaped sampling tube, the connecting tube, the U-shaped tube and the outlet pipeline are welded.

And the pipelines connected between the U-shaped sampling tube and the U-shaped tube are positioned on the same central line.

The U-shaped sampling tube and the U-shaped tube are symmetrically arranged with the connection point of the two as the origin.

The inlet pipeline is connected with the flue at an inlet end, the outlet pipeline is connected with the flue at an outlet end, and a flue gas system pressure difference is formed between the inlet end and the outlet end.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model relates to an utilize two U type flying dust sampling device of flue gas system pressure differential, including U type sampling tube and the U type pipe that is initial point symmetrical arrangement, U type sampling tube entry is equipped with inlet pipeline and flow control valve, and U type sampling tube lower part trompil is connected with the connecting pipe, and the connecting pipe lower part is equipped with the sample holding vessel, and U type exit of tubes is equipped with outlet pipe. The utility model discloses a flying dust sampling device simple structure, easy and simple to handle. Because the pressure difference of the flue gas system is utilized, no external equipment is needed to do work, continuous fly ash sampling can be realized in a flue gas passage formed by the double U-shaped fly ash sampling devices, stable and reliable fly ash collection can be ensured, the obtained sample has the most representativeness, and the measurement accuracy is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the present invention.

Wherein: 1-inlet pipeline, 2-flow regulating valve, 3-U-shaped sampling pipe, 4-connecting pipe, 5-sampling storage tank, 6-storage tank handle, 7-U-shaped pipe, 8-outlet pipeline, 9-economizer, 10-denitration system and 11-economizer ash bucket.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "horizontal", "inner", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship that the product of the present invention is usually placed when in use, the description is only for convenience of description and simplification, but the indication or suggestion that the device or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be interpreted as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The present invention will be described in further detail with reference to the accompanying drawings:

referring to fig. 1, the present embodiment provides a dual U-shaped fly ash sampling device using a pressure difference of a flue gas system, which includes an inlet pipeline 1, a U-shaped sampling pipe 3, a U-shaped pipe 7, and an outlet pipeline 8. An inlet pipeline 1 is arranged at the inlet of the U-shaped sampling tube 3, and the air flow directions of the inlet pipeline and the inlet pipeline are vertically arranged. An outlet pipeline 8 is arranged at the outlet of the U-shaped pipe 7, and the airflow directions of the U-shaped pipe and the outlet pipeline are vertically arranged. The inlet pipe 1 is provided with a flow control valve 2. The trompil of 3 lower parts of U type sampling tubes is connected with connecting

pipe

4, and 4 lower parts of connecting pipe are equipped with sample holding vessel 5, are equipped with holding vessel handle 6 on the sample holding vessel 5. The connecting pipe 4 and the sampling storage tank 5 are connected by screw threads. The inlet pipeline 1, the U-shaped sampling tube 3, the connecting pipe 4, the U-shaped pipe 7 and the outlet pipeline 8 are welded. The pipeline connected between the U-shaped sampling tube 3 and the U-shaped tube 7 is on the same central line. The U-shaped sampling tube 3 and the U-shaped tube 7 are symmetrically arranged with the connection point of the two as the origin.

As shown in fig. 2, there should be available flue gas system pressure differences between the locations of the inlet duct 1 and the flue, and the locations of the outlet duct 8 and the flue. The connecting position of the inlet pipeline 1 and the flue is positioned in the vertical flue section in front of the economizer 9 and behind the low-temperature superheater and the low-temperature reheater, and the connecting position of the outlet pipeline 8 and the flue is positioned in the vertical flue section behind the economizer 9 and in front of the denitration system 10. The connection position of the inlet pipeline 1 and the flue is selected in front of the economizer 9 because the lower part of the economizer 9 is provided with an economizer ash bucket 11, and part of fly ash in the flue gas is discharged out of the system through the economizer ash bucket 11, so that the fly ash sampling at the connection position is the strongest, and the accuracy is the highest. The inlet duct 1 may be installed at a height higher than that of the outlet duct 8 so that the flow of fly ash can flow more smoothly from the inlet to the outlet. The inlet pipeline 1 and the outlet pipeline 8 are connected with the flue by welding or flanges.

The utility model discloses a working process:

when the device is used specifically, the inlet pipeline 1 of the double-U-shaped fly ash sampling device is arranged at the vertical flue section in front of the economizer 9 and behind the low-temperature superheater and the low-temperature reheater, and the outlet pipeline 8 is arranged at the vertical flue section behind the economizer 9 and in front of the denitration system 10. Because the resistance of the parallel pipelines is the same, the resistance of the coal economizer in the flue is utilized, and part of flue gas flows through the double-U-shaped fly ash sampling device. The flow of the flue gas flowing through the double U-shaped fly ash sampling device can be controlled by adjusting the flow regulating valve 2, so that the fly ash sampling amount is controlled.

Before sampling, the residual fly ash in the sampling storage tank 5 is emptied, and the storage tank 5 is screwed into the connecting pipe 4 by rotating the storage tank handle 6 arranged on the storage tank 5. And opening the flow regulating valve 2 to enable the double-U-shaped fly ash sampling device to form a flue gas passage, wherein the flue gas passage is connected with the flue of the economizer in parallel, and the system resistance of the parallel pipelines is the same. Because of the small resistance of the double U-shaped fly ash sampling device, the smoke with a large amount of entrained fly ash particles tends to pass through the smoke passage of the double U-shaped fly ash sampling device. Because the pressure difference of the flue gas system is utilized, no external equipment is needed to do work, and continuous fly ash sampling can be realized in a flue gas passage formed by the double U-shaped fly ash sampling devices.

After the flue gas wrapped with the fly ash particles flows to the position of the inlet pipeline 1 in the tail flue, part of the fly ash particles fall under the action of gravity in the U-shaped sampling pipe 3 and enter the connecting pipe 4 to further enter the storage tank 5, and the other part of the fly ash particles enter the U-shaped pipe 7 and flow through the outlet pipeline 8 to enter the subsequent flue. The connection pipe 4 has a tubular elongated structure so that the fly ash collected in the storage tank 5 is not easily escaped. After sampling, the storage tank 5 can be taken down through the storage tank handle 6, and the flying ash sample in the period is obtained.

The double-U-shaped fly ash sampling device utilizing the pressure difference of the flue gas system can realize continuous fly ash sampling in the flue gas passage, can ensure stable and reliable fly ash collection, and ensures the accuracy of measurement and subsequent test due to the fact that the obtained sample has the most representativeness.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A double U-shaped fly ash sampling device utilizing the pressure difference of a flue gas system is characterized by comprising:

the inlet of the inlet pipeline (1) is connected to a vertical flue section between the economizer (9) and the low-temperature superheater and the low-temperature reheater, and the outlet of the inlet pipeline (1) is connected to the inlet of the U-shaped sampling pipe (3);

the outlet of the U-shaped sampling tube (3) is connected with the inlet of the U-shaped tube (7), the bottom of the U-shaped sampling tube (3) is provided with an opening for sampling, and the opening is connected with a sampling unit;

the outlet of the U-shaped pipe (7) is connected with an outlet pipeline (8);

the outlet of the outlet pipeline (8) is connected with a vertical flue section between the economizer (9) and the denitration system (10).

2. The double U-shaped fly ash sampling device utilizing the pressure difference of the flue gas system as claimed in claim 1, wherein the air flow direction of the inlet of the U-shaped sampling tube (3) is perpendicular to the air flow direction of the outlet of the inlet pipeline (1); the airflow direction of the outlet of the U-shaped pipe (7) is vertical to the airflow direction of the inlet of the outlet pipeline (8).

3. The double U-shaped fly ash sampling device using flue gas system pressure difference according to claim 1, wherein the inlet pipe (1) is provided with a flow regulating valve (2).

4. The dual U-shaped fly ash sampling device using flue gas system pressure difference according to claim 1, wherein the sampling unit comprises a sampling storage tank (5), the sampling storage tank (5) is connected with the opening of the U-shaped sampling pipe (3) through a connecting pipe (4), and a storage tank handle (6) is arranged on the sampling storage tank (5).

5. The dual U-shaped fly ash sampling device using flue gas system pressure difference according to claim 4, wherein the connection pipe (4) and the sampling storage tank (5) are connected by screw thread.

6. The double U-shaped fly ash sampling device utilizing the pressure difference of the flue gas system as claimed in claim 1, wherein the inlet pipeline (1), the U-shaped sampling tube (3), the connecting tube (4), the U-shaped tube (7) and the outlet pipeline (8) are welded.

7. The double U-shaped fly ash sampling device utilizing the pressure difference of the flue gas system as claimed in claim 1, wherein the pipeline connected between the U-shaped sampling pipe (3) and the U-shaped pipe (7) is located on the same center line.

8. The double U-shaped fly ash sampling device utilizing the pressure difference of the flue gas system as claimed in any one of claims 1 to 7, wherein the U-shaped sampling pipe (3) and the U-shaped pipe (7) are symmetrically arranged with the connection point of the two as the origin.

9. The dual U-shaped fly ash sampling device using flue gas system pressure difference according to claim 1, wherein the inlet pipe (1) is connected to the flue at an inlet end, the outlet pipe (8) is connected to the flue at an outlet end, and the flue gas system pressure difference is present between the inlet end and the outlet end.