CN210699493U

CN210699493U - Clean flue gas export CEMS system infiltration dehumidification system

Info

Publication number: CN210699493U
Application number: CN201921111390.4U
Authority: CN
Inventors: 李虎; 刘铁军
Original assignee: Inner Mongolia Jinghai Coal Gangue Power Generation Co Ltd
Current assignee: Inner Mongolia Jinghai Coal Gangue Power Generation Co Ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-06-09
Anticipated expiration: 2029-07-16

Abstract

The utility model discloses a net flue gas export CEMS system infiltration dehumidification system, including the work unit, the work unit communicates with each other with flue gas pipeline is fixed to be connected, through connecting tube and infiltration dehumidification device input fixed connection on the flue gas pipeline, fixedly communicate with each other on the connecting tube of infiltration dehumidification device and flue gas pipeline and be connected with phosphoric acid titration outfit. The utility model discloses an use phosphoric acid titration outfit, because phosphoric acid belongs to the medium and strong acid, acidity is higher than sulfurous acid, the process of instiling into phosphoric acid can restrain the formation of sulfurous acid, simultaneously with alkaline ammonia rapid reaction, ammonium bisulfite in the flue gas of will sampling fully dissolves, phosphoric acid self chemical property is very stable, can not produce other accessory substances, can not absorb sulfur dioxide and nitrogen oxide in the sampling flue gas yet, the analyte is arranged outside infiltration dehydrating unit system along with compressed air, the sampling flue gas infiltration dehydrating unit infiltration pipe jam problem has been solved, reduce CEMS operation fault rate, make CEMS operation more stable and accuracy.

Description

Clean flue gas export CEMS system infiltration dehumidification system

Technical Field

The utility model relates to a CEMS technical field specifically is a net flue gas export CEMS system infiltration dehumidification system.

Background

A CEMS system permeation dehumidification system of a clean flue gas outlet breaks down, water in sampled flue gas cannot be separated out, so that a dew point value rises rapidly, after the dew point alarm value is reached, an interlocking protection action causes CEMS failure and outage, so that pollutant emission data in the current time period is abnormal and exceeds the standard, namely, in the use process, the reason for causing permeation effect failure of a permeation tube is that secondary aerosol particles (the particle size is generally 0.01-1 mu m) exist in the sampled flue gas, the particles are ammonia residues caused by insufficient reaction due to changes of unit load, temperature field in a furnace and the like when SNCR denitration is carried out in the furnace, the residual ammonia and sulfur dioxide in the flue gas generate ammonium bisulfite through acid-base neutralization reaction under the water-containing working condition, the ammonium bisulfite is accumulated after Brownian movement to form secondary aerosol particles which are remained in the sampled flue gas to directly cause permeation tube blockage, and research determines to adopt an ammonia remover to effectively remove ammonia, when the analyzer has a low-flow fault, the flow of the flue gas is low because the sampled flue gas is blocked by light yellow residues attached to the inlet of an ammonia remover (shown in figure 2).

Although the ammonia remover can achieve the ammonia removing effect by removing the self reasons of the dew point detection device and the permeation dehumidification device one by one, the ammonia escape rate exceeds the designed absorption capacity of the ammonia remover, and the CEMS operation failure rate can still be increased, so that the quantitative ammonia removal cannot meet the unit working condition requirement, the daily maintenance workload is large, the data error provided by the desulfurization and denitration process regulation of the working unit is large, and the energy consumption of the desulfurization and denitration process of the working unit is improved. Therefore, we improve the method and provide a clean flue gas outlet CEMS system permeation dehumidification system.

SUMMERY OF THE UTILITY MODEL

For solving the defect that prior art exists, the utility model provides a net flue gas export CEMS system infiltration dehumidification system.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model relates to a clean flue gas export CEMS system infiltration dehumidification system, including the work unit, the work unit is connected with the flue gas pipeline is fixed to communicate with each other, through connecting tube and infiltration dehumidification device input fixed connection on the flue gas pipeline, fixedly communicate with each other on the connecting tube of infiltration dehumidification device and flue gas pipeline and be connected with phosphoric acid titration outfit, phosphoric acid titration outfit input and the fixed connection that communicates with each other of phosphoric acid reservoir, infiltration dehumidification device output and nitrogen dioxide converter input fixed connection, nitrogen dioxide converter output and analysis appearance input fixed connection, fixedly connected with waste liquid bucket on the infiltration dehumidification device waste liquid output.

As an optimized technical proposal of the utility model, the phosphoric acid titration device adopts a phosphoric acid titration pump, and the pump speed is manually adjusted.

As a preferred technical scheme of the utility model, the phosphoric acid reservoir is filled with 5% phosphoric acid solution, and the 5% phosphoric acid solution is diluted by distilled water according to the proportion of 1: 16.

The utility model has the advantages that: the permeation dehumidification system of the clean flue gas outlet CEMS system uses the phosphoric acid titration device, because phosphoric acid belongs to medium-strong acid, the acidity is higher than that of sulfurous acid, the process of dropping into phosphoric acid can inhibit the formation of sulfurous acid and simultaneously and quickly react with alkaline ammonia, ammonium bisulfite in sampled flue gas is fully dissolved, the self chemical property of phosphoric acid is very stable, other byproducts can not be generated, sulfur dioxide and nitrogen oxide in sampled flue gas can not be absorbed, decomposed substances are discharged out of the permeation dehumidification device system along with compressed air, the problem of blockage of a permeation tube of the sampled flue gas permeation dehumidification device is solved, the operation failure rate of the CEMS is reduced, the CEMS is enabled to operate more stably and accurately, the environmental protection monitoring data of atmospheric pollutants are ensured to be uploaded effectively and accurately in real time, and the daily maintenance workload is reduced, and accurate data are provided for the desulfurization and denitration process regulation of a working unit, greatly improving the effects of energy conservation and efficiency improvement.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram of a clean flue gas outlet CEMS system infiltration dehumidification system of the present invention;

fig. 2 is a prior art schematic diagram of a clean flue gas outlet CEMS system infiltration dehumidification system of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Example (b): as shown in figure 1, the utility model relates to a clean flue gas export CEMS system infiltration dehumidification system, including the work unit, the work unit is connected with flue gas pipeline fixed communication, pass through connecting tube and infiltration dehumidification device input fixed connection on the flue gas pipeline, fixed communication is connected with phosphoric acid titration device on the connecting tube of infiltration dehumidification device and flue gas pipeline, phosphoric acid titration device input and phosphoric acid reservoir fixed communication are connected, infiltration dehumidification device output and nitrogen dioxide converter input fixed connection, nitrogen dioxide converter output and analysis appearance input fixed connection, fixedly connected with waste liquid bucket on the infiltration dehumidification device waste liquid output, this kind of clean flue gas export CEMS system infiltration dehumidification system, through using phosphoric acid titration device, because phosphoric acid belongs to the medium strong acid, acidity is higher than sulfurous acid, instil into the formation of phosphoric acid, simultaneously with alkaline ammonia fast reaction, ammonium bisulfite in the flue gas of will sampling fully dissolves, phosphoric acid self chemical property is very stable, can not produce other accessory substances, also can not absorb sulfur dioxide and nitrogen oxide in the flue gas of sampling, the analyte is discharged outside infiltration dehydrating unit system along with compressed air, the problem of sampling flue gas infiltration dehydrating unit infiltration pipe jam has been solved, reduce CEMS operation fault rate, make CEMS operation more stable and accuracy, it is real-time to have guaranteed atmospheric pollutants environmental protection monitoring data, it is effective, accurate upload, the while has also reduced the routine maintenance work load, again for the unit desulfurization of work, denitration technology regulation and control provides accurate data, energy-conserving supplementary potentiation effect has greatly been promoted.

The phosphoric acid titration device adopts a phosphoric acid titration pump, the pump speed of the phosphoric acid titration device is manually adjusted, and the phosphoric acid titration device can be adjusted to 0.8 r/min according to the operation condition of the working unit.

Wherein, the phosphoric acid liquid storage device is filled with 5 percent phosphoric acid solution, and the 5 percent phosphoric acid solution is diluted by distilled water according to the proportion of 1:16, thereby ensuring that the phosphoric acid solution can better inhibit the formation of sulfurous acid and simultaneously can rapidly react with alkaline ammonia.

The working principle is as follows:

the sampling flue gas passes through in the flue gas pipeline flows into infiltration dehydrating unit, at the inflow in-process, phosphoric acid titration outfit starts for the continuous phosphoric acid solution that drips into, and the sampling flue gas carries out mutual physics and chemical reaction, carries out effectual formation that restraines the sulfurous acid, simultaneously with alkaline ammonia fast reaction, ammonium bisulfite in the flue gas of will sampling fully dissolves, and the analyte is discharged to and is retrieved in the outer waste liquid bucket of infiltration dehydrating unit system along with compressed air.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. 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. The utility model provides a clean flue gas export CEMS system infiltration dehumidification system, includes the work unit, the work unit communicates with each other with flue gas pipeline fixed and is connected, through connecting tube and infiltration dehumidification device input fixed connection on the flue gas pipeline, a serial communication port, fixedly communicate with each other on the connecting tube of infiltration dehumidification device and flue gas pipeline and be connected with phosphoric acid titration device, phosphoric acid titration device input and phosphoric acid reservoir fixed communication are connected, infiltration dehumidification device output and nitrogen dioxide converter input fixed connection, nitrogen dioxide converter output and analysis appearance input fixed connection, fixedly connected with waste liquid bucket on the infiltration dehumidification device waste liquid output.

2. The net flue gas outlet CEMS system infiltration dehumidification system of claim 1, wherein said phosphoric acid titration apparatus uses a phosphoric acid titration pump, the pumping speed of which is manually adjusted, and the adjustment range is 0.7-0.9 r/min.