CN107149875B - Non-uniform injection device and method for SCR cold-state modeling test - Google Patents

Non-uniform injection device and method for SCR cold-state modeling test Download PDF

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Publication number
CN107149875B
CN107149875B CN201710338619.7A CN201710338619A CN107149875B CN 107149875 B CN107149875 B CN 107149875B CN 201710338619 A CN201710338619 A CN 201710338619A CN 107149875 B CN107149875 B CN 107149875B
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flue
injection
pipe
inlet
scr
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CN107149875A (en
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赵宇明
沈德魁
刘国富
李春雨
陶君
李穹
马务
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Southeast University
Datang Environment Industry Group Co Ltd
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Southeast University
Datang Environment Industry Group Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/90—Injecting reactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0278—Arrangement or mounting of spray heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

Abstract

The invention provides a non-uniform injection device for an SCR cold-state modeling test, which is arranged in a flue and comprises: a plurality of groups of spraying subunits with the same structure; each of the ejection subunits includes: NO x Trace gas dilution air inlet pipe; is connected to the NO x A support pipe of the tracer gas dilution air inlet pipe; a plurality of nozzles disposed at the support tube; and the static mixing pipe is arranged at the nozzle of the nozzle. The device can realize NO in SCR cold-state modeling test x The non-uniform spraying of the tracer gas ensures that the test parameters more conform to the actual operating conditions, and improves the precision and reliability of the cold die test. Also provides a spraying method based on the device.

Description

Non-uniform injection device and method for SCR cold-state modeling test
Technical Field
The invention relates to a non-uniform injection device and method for SCR cold-state modeling test, in particular to a device capable of realizing NO x A trace gas non-uniform injection SCR cold-state modeling test device and a trace gas non-uniform injection SCR cold-state modeling test method.
Background
Coal-fired power plant denitration ultralow emission improvementMake the key NO in China x One of the important technical measures for gas emission reduction. In China, the mainstream process of the power station denitration technology is a Selective Catalytic Reduction (SCR) method, which is a method of utilizing a reducing agent (such as NH) under the action of a catalyst 3 Liquid ammonia, urea) to "selectively" with NO in the flue gas x Reacting and generating nontoxic and pollution-free N 2 And H 2 O。
The SCR denitration technology has obvious control effect on NOx in boiler flue gas, is mature and stable in technology, and is the most effective flue gas denitration technology applied in the world at present. Under reasonable arrangement and temperature range, the removal rate can reach 80-90%. Therefore, the SCR denitration technology is widely used in domestic coal-fired power plants.
NO in selective catalytic reduction denitration SCR process x The efficiency of the reduction reaction is directly determined by the NO in the flue gas x And NH 3 The mixing matching degree (reaching a reasonable equivalence ratio), namely the ammonia fume is completely reacted when the mixing matching degree is high, otherwise, the denitration efficiency is low or NH is caused 3 Excess of ammonia to form ammonia slip, which is detrimental to the SCR denitration system and even the entire boiler system.
Currently, the optimization of the SCR system basically adopts a dual technical strategy of numerical simulation and cold modeling test verification, and the cold modeling test mostly stays in a verification research stage of the distribution characteristic of the 'flue gas' velocity field at present. In recent years, some researchers have proposed that the flow and diffusion of the reducing agent ammonia in the "flue gas" are simulated by using the tracer gas, and some reasonable research results have been obtained. It is worth noting that the above studies only considered the flow and diffusion of the reductant ammonia, and assumed the Nitrogen Oxides (NO) at the denitration inlet x ) After being fully mixed through a series of turning flues, the flue gas is uniformly distributed. However, researchers find out that NO at the inlet of the SCR system is generated through means such as field measurement and the like x The concentration is not uniformly distributed, and therefore, the research strategy has certain limitations.
Disclosure of Invention
In view of the above problems, the present invention is to provide a non-uniform injection device and method for an SCR cold modeling test, which can realize NO in the SCR cold modeling test x The non-uniform injection of the tracer gas ensures that the test parameters more accord with the actual operation condition, and improves the precision and reliability of the cold die test.
In order to achieve the purpose, the invention adopts the technical scheme that:
a non-uniformity injection device for SCR cold-state modeling test is arranged in a flue and comprises:
a plurality of groups of injection subunits with the same structure;
each of the ejection subunits includes: NO x Trace gas dilution air inlet pipe; is connected to the NO x A support pipe of the tracer gas dilution air inlet pipe; a plurality of nozzles disposed at the support tube; and the static mixing pipe is arranged at the nozzle of the nozzle.
Furthermore, the flue is an inlet horizontal flue or an inlet vertical flue of the SCR denitration system.
Further, the support tube is an H-shaped tube and comprises a pair of longitudinal tubes; a transverse pipe communicated with the pair of longitudinal pipes; the nozzle is arranged on the longitudinal pipe; said NO x The tracer gas dilution air inlet pipe is communicated with the transverse pipe; the number of the static mixing pipes is two, and the static mixing pipes are arranged in parallel with the longitudinal pipe.
Further, the arrangement group number and the size of each injection subunit are determined according to the flue size, the scaling ratio and the temporary measuring hole number.
Furthermore, the transverse and longitudinal distance between the central lines of any adjacent inlets is not more than 800mm, and the value range of the diameter d1 of the inlet is 30-50 mm.
Further, the inlet parameter of each injection subunit is NO x Tracer gas dilution wind jet velocity v and NO x The concentration c; the field operation parameters are the flue gas speed and NO at each discrete measuring point position actually obtained based on the temporary measuring hole arranged on the flue x Concentration; the inlet parameters of each injection subunit are obtained from field operation parameters, and the conversion relation between the inlet parameters and the field operation parameters meets the similarity criterion.
Further, the total number of the nozzles arranged in the single spraying subunit is not less than 6, the height of the nozzles is between 20mm and 30mm, and the nozzles are in a flat opening or inclined opening form.
Furthermore, the static mixing pipe is opposite to the spraying direction of the nozzle and is in a hollow cylindrical shape, and the distance between the plane where the center line of the static mixing pipe is located and the outlet of the nozzle is 100-400 mm.
A non-uniformity injection method for an SCR cold modeling test comprises the following steps:
a temporary measuring hole is arranged on a flue to obtain the flue gas velocity and NO of a plurality of discrete measuring point positions x Concentration;
arranging a plurality of groups of injection subunits with the same structure in the flue corresponding to the temporary hole measuring positions;
each injection subunit injecting NO according to different inlet parameters x A tracer gas;
wherein the different inlet parameters are based on the flue gas velocity and NO at a plurality of discrete measuring point positions x Concentrations are obtained by transformations that satisfy similar criteria.
By adopting the technical scheme, the invention can realize NO in cold-state modeling test x The non-uniform input of the tracer gas ensures that the test parameters more accord with the actual operation condition, is beneficial to improving the precision and the reliability of the cold die test, and is beneficial to guiding the optimization of production operation.
Drawings
FIG. 1 shows NO used in SCR cold modeling test in one embodiment of the present invention x Schematic view of installation position of the concentration non-uniformity spraying device.
FIG. 2 shows NO used in SCR cold modeling test in an embodiment of the present invention x A schematic view of the overall planar arrangement of the concentration-nonuniformity spraying apparatuses.
FIG. 3 shows NO used in an SCR cold modeling test in an embodiment of the present invention x A schematic three-dimensional structure diagram of the injection subunit in the concentration non-uniformity injection device.
FIG. 4 shows NO used in an SCR cold modeling test in an embodiment of the present invention x Concentration non-uniformity jetting deviceThe side view structure of the middle spraying subunit is schematically shown.
FIG. 5 shows NO used in an SCR cold modeling test according to an embodiment of the present invention x The results of cold modeling tests (distribution characteristics of NO flux in the front flue section of the ammonia injection grid) performed by the concentration non-uniformity injection device.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments:
for a certain 660 MW-level coal-fired unit SCR system, the present embodiment provides a non-uniform injection device for SCR cold-state modeling test, which is disposed in a flue, as shown in fig. 1, and is installed in a horizontal flue at an inlet of the SCR system. The cross-sectional dimension of the material is 5200mm × 8400mm. 4 temporary measuring holes are reserved on the upper portion of the horizontal flue at the inlet of the SCR system. NO for SCR cold-state modeling test x The installation position of the concentration non-uniformity injection device is kept consistent according to the position of a temporary measuring hole at the inlet of the SCR system, in other embodiments, the flue can be selected from an inlet vertical flue of the SCR denitration system, and the temporary measuring hole is correspondingly arranged in the inlet vertical flue.
As shown in fig. 2, the apparatus includes: a plurality of groups of spraying subunits with the same structure; one of the injection subunits is outlined by a dashed box in the figure. The integral scaling of each injection subunit is consistent with the scaling of cold-state modeling test design, the arrangement group number of each injection subunit in the transverse direction and the longitudinal direction of the device is determined according to the number of temporary measuring holes and the number of discrete measuring points arranged in each measuring hole, and the size of the flue is combined to ensure that each injection subunit can be uniformly distributed on the section of the whole flue.
Referring to fig. 3 and 4, each of the injection subunits includes: NO x Trace gas dilution air inlet pipe 1; communication of NO x A support pipe 2 of a tracer gas dilution air inlet pipe 1; a plurality of nozzles 3 provided in the holder pipe 2; and a static mixing pipe 4 arranged at the nozzle opening of the nozzle 3.
The support pipe 2 is an H-shaped pipe and comprises a pair of longitudinal pipes; a transverse pipe communicated with the pair of longitudinal pipes; the nozzle 3 is arranged on the longitudinal pipe; NO (nitric oxide) x The tracer gas dilution air inlet pipe 1 is communicated with the transverse pipe; the static mixing tube 4 has twoAnd is arranged in parallel with the longitudinal pipe.
The arrangement group number and the size of each injection subunit are determined according to the size of the flue, the scaling ratio and the number of temporary measuring holes.
NO of each injection subunit x The tracer gas dilution air inlet parameter can be non-uniformly customized based on the field operation parameter, specifically, the inlet parameter of each injection subunit is NO x Tracer gas dilution wind jet velocity v and NO x Concentration c, the field operation parameters are the flue gas speed and NO at each discrete measuring point position actually obtained based on the temporary measuring hole arranged on the flue x Concentration, the inlet parameters of each injection subunit are obtained from field operation parameters, and the conversion relation between the concentration and the inlet parameters meets the similarity criterion.
The static mixing pipe is opposite to the spraying direction of the nozzle and is in a hollow cylindrical shape.
The non-uniform injection method for the SCR cold-state modeling test based on the device comprises the following steps:
a temporary measuring hole is arranged on a flue to obtain the flue gas velocity and NO at a plurality of discrete measuring point positions x Concentration;
arranging a plurality of groups of injection subunits with the same structure in the flue corresponding to the temporary hole measuring positions;
each injection subunit injecting NO according to different inlet parameters x A tracer gas;
wherein the different inlet parameters are based on the flue gas velocity and NO at a plurality of discrete measuring point positions x Concentrations are obtained by conversion that satisfies similar criteria.
In the embodiment, the inlet NO under each constant load working condition is obtained by directly measuring the measuring hole reserved in the horizontal flue at the inlet of the SCR system x The concentration is non-uniformly distributed, namely, a flue gas analyzer is adopted to obtain NO in the flue gas at the position of each discrete measuring point x Concentration, the smoke velocity at each discrete measuring point position is obtained by using Pitot tube and is used as NO x 4 injection subunits NO in concentration non-uniformity injection apparatus x Tracer gas dilution air inlet jet velocity v and inlet flue gas NO x The spraying basis of the concentration is realized, thereby realizing that the concentration is comparatively more than the field operation working conditionThe consistent non-uniform inlet input is realized, and because each measuring hole measures the operating characteristics of 3 depths, 3 multiplied by 4 groups of spraying subunits with completely same structures and different inlet parameters are arranged. Each group of injection subunits comprising NO x The tracer gas dilution air inlet, the support pipe, the injection nozzle and the static mixing pipe.
The scaling of the SCR cold modeling test in this embodiment is 1.
The transverse distance between any two adjacent inlet central lines of each injection subunit is 800mm, the longitudinal distance is 600mm, and the diameter d1 of each inlet is 50mm; in other embodiments, the transverse and longitudinal spacing of any adjacent inlet centerlines is no more than 800mm, and the inlet pipe diameter d1 ranges from 30mm to 50mm.
The jet subunit stent tube is hollow inside so that NO x The boundary of a tracer gas dilution air inlet is communicated with the jet nozzles, the total number of the nozzles arranged in a single jet subunit is 8, and the height of each nozzle is 20mm; in other embodiments, the total number of nozzles arranged in a single spraying subunit is not less than 6, the height of the nozzles is between 20mm and 30mm, and the nozzles are in a flat mouth or a beveled mouth form.
The static mixing pipe of the injection subunit is positioned right above the injection nozzle, and the height from the plane of the center line of the static mixing pipe to the outlet plane of the injection nozzle is 250mm; in other embodiments, the distance between the plane of the center line of the static mixing pipe and the outlet of the nozzle is 100 mm-400mm.
In this embodiment NO x The concentration non-uniformity injection device is composed of a plurality of groups of injection subunits with the same structure, and different injection subunits have different inlet parameters, so that the test parameters are ensured to better accord with the actual non-uniform operation working conditions.
NO suitable for SCR cold-state modeling test based on embodiment x The concentration non-uniformity injection device carries out cold die test research under the working conditions of 100% load, 90% load, 75% load and 60% constant load, and obtains the distribution characteristic of the NO flux field in the section of the ammonia injection grid through interception, as shown in figure 4. The acquisition of NO flux field distribution characteristics overcomes the traditional hypothesis of inlet NO x The inherent defect of uniform concentration distribution is helpful for accurately guiding ammonia injection, and provides a powerful guidance suggestion for production operation adjustment. This shows that the NO suitable for the SCR cold-state modeling test is disclosed by the invention x The concentration non-uniformity injection device can realize NO in cold-state modeling test x The non-uniform input of the tracer gas ensures that the test parameters more accord with the actual operation condition, is beneficial to improving the precision and the reliability of the cold die test, and is beneficial to guiding the optimization of production operation.
As described above, in order to reflect the flowing and diffusion characteristics of the SCR system more truly and improve the precision and reliability of the cold die test, the NO suitable for the SCR cold state modeling test provided by the invention x Concentration non-uniformity injection device and method for realizing NO in cold-state modeling test based on field actual measurement parameters x Heterogeneous input of tracer gas, thereby more comprehensively researching NO in the system x And/and NH 3 The diffusion process of (1).
The above description is only exemplary of the present invention, and not intended to limit the present invention, and any modifications, equivalents, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Other technical features than those described in the specification are known to those skilled in the art.

Claims (5)

1. A non-uniform injection method for SCR cold-state modeling test is characterized in that the non-uniform injection method is realized according to a non-uniform injection device, the non-uniform injection device is arranged in a flue, and the method comprises the following steps: a plurality of groups of spraying subunits with the same structure; each of the ejection subunits includes: NO x Trace gas dilution air inlet pipe; is connected to the NO x A support pipe of the tracer gas dilution air inlet pipe; a plurality of nozzles disposed at the support tube; the static mixing pipe is arranged at the nozzle of the nozzle; the support tube is an H-shaped tube and comprises a pair of longitudinal tubes; a transverse pipe communicated with the pair of longitudinal pipes; the nozzle is arranged on the longitudinal pipe; the NOx/tracer gas dilution air inletThe tube is communicated with the transverse tube; the number of the static mixing pipes is two, and the static mixing pipes are arranged in parallel with the longitudinal pipe;
the non-uniform ejection method includes the steps of:
a temporary measuring hole is arranged on the flue, and the NO in the flue gas at the positions of a plurality of discrete measuring points is measured and obtained by adopting a flue gas analyzer x Concentration, the smoke velocity on each discrete measuring point position is obtained by adopting a pitot tube and is used as the NO of each injection subunit in the non-uniform injection device x Tracer gas dilution air inlet jet velocity v and inlet flue gas NO x The spraying basis of the concentration c;
arranging a plurality of groups of injection subunits with the same structure in the flue corresponding to the positions of the temporary measuring holes, wherein the arrangement group number and the size of each injection subunit are determined according to the size of the flue, the scaling ratio and the number of the temporary measuring holes;
each injection subunit injecting NO according to different inlet parameters x A tracer gas; the inlet parameter of each injection subunit is NO x Tracer gas dilution wind jet velocity v and NO x The concentration c; the field operation parameters are the flue gas speed and NO at each discrete measuring point position actually obtained based on the temporary measuring hole arranged on the flue x Concentration, wherein the inlet parameters of each injection subunit are obtained from field operation parameters; the conversion relationship between the two satisfies the similarity criterion.
2. The non-uniformity spraying method of claim 1, wherein the flue is an inlet horizontal flue or an inlet vertical flue of an SCR denitration system.
3. The non-uniform jetting method according to claim 1, wherein any adjacent NO x The transverse and longitudinal distance of the central line of the tracer gas dilution air inlet pipe is not more than 800mm, and the value range of the inlet pipe diameter d1 is 30-50 mm.
4. The non-uniformity spray method of claim 1, wherein the total number of nozzles arranged in a single spray subunit is not less than 6, the height of said nozzles is between 20mm and 30mm, and the nozzles are in the form of flat or inclined ports.
5. The non-uniformity spray method of claim 1, wherein the static mixing tube is hollow cylindrical facing the spray direction of the nozzle, and the distance between the plane of the center line of the static mixing tube and the outlet of the nozzle is between 100mm and 400mm.
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US11525380B2 (en) 2019-01-11 2022-12-13 Cummins Emission Solutions Inc. Aftertreatment system with multiple dosing modules
CN112581848A (en) * 2020-12-11 2021-03-30 中国建筑科学研究院有限公司 Tunnel fire smoke motion measurement simulation test system

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201524524U (en) * 2009-09-29 2010-07-14 曾永健 Analog platform of flow field distribution structure of flue gas denitration device
CN103752170A (en) * 2014-01-16 2014-04-30 华中科技大学 Denitration operation optimization method for SCR (Selective Catalytic Reduction) system of tangential firing pulverized coal boiler
CN203672863U (en) * 2014-01-20 2014-06-25 中国科学院宁波城市环境研究中心（筹） Device for evaluating flue gas denitration catalyst activity
CN103926833A (en) * 2014-04-22 2014-07-16 东南大学 Method for determining inlet parameter of SCR denitration device
CN103927420A (en) * 2014-04-22 2014-07-16 东南大学 Method for optimizing gas-solid two-phase flow field and ammonia spraying of selective catalytic reduction denitration device
CN105498530A (en) * 2015-12-08 2016-04-20 江苏方天电力技术有限公司 Method for instructing ammonia spray adjustment through introducing tracer gases in SCR system simulation
CN105597538A (en) * 2015-12-22 2016-05-25 河北省电力建设调整试验所 Denitration reductant adding control method based on time difference matching and control device of control method
CN206897180U (en) * 2017-05-15 2018-01-19 大唐环境产业集团股份有限公司 Heterogeneity injection apparatus for SCR cold simulation tests

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6905658B2 (en) * 2001-06-29 2005-06-14 The Babcock & Wilcox Company Channelized SCR inlet for improved ammonia injection and efficient NOx control
US9506390B1 (en) * 2015-06-18 2016-11-29 Ford Global Technologies, Llc Distributed control of selective catalytic reduction systems

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201524524U (en) * 2009-09-29 2010-07-14 曾永健 Analog platform of flow field distribution structure of flue gas denitration device
CN103752170A (en) * 2014-01-16 2014-04-30 华中科技大学 Denitration operation optimization method for SCR (Selective Catalytic Reduction) system of tangential firing pulverized coal boiler
CN203672863U (en) * 2014-01-20 2014-06-25 中国科学院宁波城市环境研究中心（筹） Device for evaluating flue gas denitration catalyst activity
CN103926833A (en) * 2014-04-22 2014-07-16 东南大学 Method for determining inlet parameter of SCR denitration device
CN103927420A (en) * 2014-04-22 2014-07-16 东南大学 Method for optimizing gas-solid two-phase flow field and ammonia spraying of selective catalytic reduction denitration device
CN105498530A (en) * 2015-12-08 2016-04-20 江苏方天电力技术有限公司 Method for instructing ammonia spray adjustment through introducing tracer gases in SCR system simulation
CN105597538A (en) * 2015-12-22 2016-05-25 河北省电力建设调整试验所 Denitration reductant adding control method based on time difference matching and control device of control method
CN206897180U (en) * 2017-05-15 2018-01-19 大唐环境产业集团股份有限公司 Heterogeneity injection apparatus for SCR cold simulation tests

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