CN114113498B - Fluid flow velocity reverse disturbance purification test system and method for SCR denitration system - Google Patents
Fluid flow velocity reverse disturbance purification test system and method for SCR denitration system Download PDFInfo
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- CN114113498B CN114113498B CN202210082834.6A CN202210082834A CN114113498B CN 114113498 B CN114113498 B CN 114113498B CN 202210082834 A CN202210082834 A CN 202210082834A CN 114113498 B CN114113498 B CN 114113498B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0011—Sample conditioning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
- G01N33/0037—Specially adapted to detect a particular component for NOx
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention belongs to the field of detection and test, and particularly relates to a fluid flow velocity reverse disturbance purification test system and method for an SCR denitration system; the fluid flow velocity reverse disturbance purification test system comprises a pipe body; a plurality of layers of reaction modules are distributed along the inner wall of the pipe body, wherein at least one reaction module positioned in the middle layer adopts a rotary arrangement, and a disturbance adjusting mechanism is arranged on the side edge of the reaction module; and a first gas detection sensor and a second gas detection sensor are arranged at the inlet and the outlet of the pipe body; the first gas detection sensor and the second gas detection sensor send the nitrogen oxide content data of the inlet test gas and the nitrogen oxide content data of the outlet test gas to the control module to obtain the purification data of the nitrogen oxide; the control module controls the disturbance adjusting mechanism to enable the corresponding reaction modules to rotate according to the purification data, adjusts the disturbance amount of the airflow between each layer of reaction modules, and records the single-plate included angle value and the purification data of the rotating reaction modules and the adjacent reaction modules.
Description
Technical Field
The invention belongs to the field of detection and test, and particularly relates to a fluid flow velocity reverse disturbance purification test system and a fluid flow velocity reverse disturbance purification test method.
Background
In current filtration technology, often adopt among the gas emission filtration to set up filter module or reaction module in discharging the pipeline especially, when harmful gas passes through filter module or reaction module, absorb or decompose harmful component, reduce harmful substance to external emission.
Usually, a plurality of filter modules or reaction modules are arranged to detect the test effect, but the included angle of the filter modules or the reaction modules and the corresponding purification effect are not supported by good test data.
Therefore, how to obtain the test data of the fluid flow rate reverse disturbance purification and provide necessary data guarantee for the implementation of the SCR denitration system is a technical problem which needs to be solved in the field.
Disclosure of Invention
The invention aims to provide a fluid flow velocity reverse disturbance purification test system and method for an SCR denitration system.
In order to solve the technical problem, the invention provides a fluid flow velocity reverse disturbance purification test system, which comprises a pipe body; a plurality of layers of reaction modules are distributed along the inner wall of the pipe body, wherein at least one reaction module positioned in the middle layer adopts a rotary arrangement, and a disturbance adjusting mechanism is arranged on the side edge of the reaction module; and a first gas detection sensor and a second gas detection sensor are arranged at the inlet and the outlet of the pipe body; the first gas detection sensor and the second gas detection sensor send the nitrogen oxide content data of the inlet test gas and the nitrogen oxide content data of the outlet test gas to the control module to obtain the purification data of the nitrogen oxide; the control module controls the disturbance adjusting mechanism to enable the corresponding reaction modules to rotate according to the purification data, adjusts the disturbance amount of the airflow between each layer of reaction modules, and records the single-plate included angle value and the purification data of the rotating reaction modules and the adjacent reaction modules.
In another aspect, the invention further provides a method for testing the purification effect of the fluid flowing in the reverse disturbance mode for the SCR denitration system, which includes the following steps:
step S1, setting a multilayer reaction module;
step S2, rotationally setting the reaction modules in the middle layer, changing the included angle value of the single plate between the reaction modules and the adjacent reaction modules, and further adjusting the disturbance amount of the airflow between the reaction modules in each layer;
step S3, detecting a gas purification amount by a gas detection sensor;
and step S4, recording the included angle value of the single plate and gas purification data.
The fluid flow velocity reverse disturbance purification test system has the advantages that the purification effect and the air flow mechanics are combined in the reaction tube body to form a test environment, namely, the purification data of nitrogen oxides are obtained at the inlet and the outlet through the detection of the gas detection sensor, and the purification effect is fed back; specifically, the included angle value of the single plates of the adjacent reaction modules can be changed through the disturbance adjusting mechanism, the angle is controlled through the control module to adjust the size, so that the air flow disturbance amount is adjusted, the included angle value of the single plates and purification data can be obtained in the whole adjusting process, and necessary data support is provided for the layout mode of the reaction modules in the SCR denitration system.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of the fluid flow rate reverse disturbance purge test system of the present invention;
FIG. 2 is a top view of the present invention showing the angle when 3 layers of reaction modules are arranged;
FIG. 3 is a top view of the present invention showing the angle when 4 layers of reaction modules are arranged;
FIG. 4 is a schematic view of the structure of an internal reaction module when a 3-layer reaction module is provided according to the present invention;
FIG. 5 is a schematic view of the structure of an internal reaction module when 4 layers of reaction modules are arranged according to the present invention;
FIG. 6 is a control schematic block diagram of the fluid flow rate reverse disturbance purge test system of the present invention;
FIG. 7 is a flow chart of the fluid flow rate reverse disturbance purifying effect testing method of the present invention.
In the figure:
a pipe body 1;
a reaction module 2.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
SCR is a short hand for Selective Catalytic Reduction, namely a Selective Catalytic Reduction technology, and the SCR denitration process flow mainly takes ammonia as a reducing agent to react with flue gas under the action of a catalyst in an SCR reactor so as to remove nitrogen oxides.
As shown in fig. 1, 4 and 6, the fluid flow velocity reverse disturbance purification test system for an SCR denitration system of this embodiment may include a pipe body 1, and a plurality of layers of reaction modules 2 are arranged along an inner wall of the pipe body, wherein at least one reaction module 2 located in an intermediate layer is rotatably disposed, and a disturbance adjustment mechanism is disposed at a side edge of the reaction module 2; and a first gas detection sensor and a second gas detection sensor are arranged at the inlet and the outlet of the pipe body 1; the first gas detection sensor and the second gas detection sensor send the nitrogen oxide content data of the inlet test gas and the nitrogen oxide content data of the outlet test gas to the control module to obtain the purification data of the nitrogen oxide; the control module controls the disturbance adjusting mechanism to enable the corresponding reaction modules 2 to rotate according to the purification data, adjusts the disturbance amount of the airflow between each layer of reaction module 2, and records the single-plate included angle value and the purification data of the rotating reaction module 2 and the adjacent reaction module 2.
The reverse disturbance of fluid flow velocity of flow that this embodiment relates to purifies test system combines together purification effect and air flow in the reaction body and forms multiple test environment, detects the purification data that advances, the exit obtains nitrogen oxide through gas detection sensor promptly, feeds back purification effect, changes the contained angle between the veneer of adjacent reaction module through disturbance adjustment mechanism, and the veneer contained angle value is promptly, through control module control angle regulation size to adjust the air current disturbance volume. When the discharge concentration at the outlet is at a low level, the reaction is insufficient, and the control module controls the disturbance adjusting mechanism to increase the included angle to enhance the disturbance quantity so as to fully react; when emission concentration is in the low level and consuming time longer, control module control disturbance adjustment mechanism reduces the contained angle and reduces the disturbance volume to reduce reaction time and promote work efficiency, can effectually obtain the purifying effect on the basis of multiple air flow science through the collection to single plate contained angle value and purification data, provide necessary data support for SCR deNOx systems's filter effect improvement.
As shown in fig. 2, in the present embodiment, three layers of reaction modules 2 are arranged along the inner wall of the pipe body; wherein the single plate included angle values of the reaction modules 2 of the first layer and the third layer are 0 degree; in an initial state, the control module controls the disturbance adjusting mechanism to rotate the reaction module 2 in the middle layer to the single-plate included angle value of the reaction module 2 in the upper layer (adjacent layer) and the single-plate included angle value of the reaction module 2 in the lower layer (adjacent layer) to be 90 degrees, so that the disturbance amount is maximum; the control module changes the included angle of the single plate according to the gas discharge amount so as to reduce the disturbance amount and simultaneously keep the gas discharge amount not to exceed the discharge standard. Wherein the emission standard may be pre-stored in the control module in advance.
As shown in fig. 3, the reaction module 2 at the first layer and the reaction module 2 at the last layer are fixedly arranged, the single-plate included angle value of the two is 0 °, N reaction modules 2 are arranged between the two, and N is not less than 2 and is independently controlled by a corresponding disturbance adjusting mechanism; in an initial state, the control module controls each disturbance adjusting mechanism to respectively adjust the corresponding reaction module 2 to rotate so as to enable the included angle value of the single plates of the adjacent reaction modules 2 to be 180 degrees/N +1, and the maximum disturbance quantity is obtained; the control module changes the included angle value of each single plate according to the gas discharge amount so as to reduce the disturbance amount and simultaneously keep the gas discharge amount not to exceed the discharge standard. The middle layer is shown to be provided with two reaction modules 2, which are rotated by 60 ° in sequence on the basis of the direction of the reaction modules 2 of the first layer.
As shown in fig. 4, the end edge of the single plate in the reaction module 2 suitable for rotation may be tilted to form a buffer fan blade; when the gas emission exceeds the emission standard, the control module controls the disturbance adjusting mechanism to drive the reaction module 2 to rotate, namely, the flow velocity of gas flowing out of the single plate in the reaction module 2 is reduced after the buffer fan blades rotate.
As shown in fig. 5, for a plurality of reaction modules 2 suitable for rotation, the front edge of the single plate in the reaction module 2 of the first layer is formed by tilting, forming a suction fan blade; the tail edge of the single plate in the reaction module 2 at the last layer is tilted to form a buffer fan blade; when the gas emission reaches the emission standard of more than 150%, the reaction modules 2 on the first layer and the last layer rotate relatively to form an air compression cavity between the two reaction modules 2, so that the gas emission does not exceed the emission standard; or when the gas emission is 100% -150% of the emission standard, the reaction module 2 at the last layer rotates, namely the flow velocity of gas flowing out of the single plate in the reaction module 2 is reduced after the buffer fan blades rotate, so that the gas emission does not exceed the emission standard; or when the amount of gas emission is lower than the emission standard, the reaction module 2 of the first layer is rotated to increase the gas flow rate and keep the amount of gas emission not to exceed the emission standard.
Preferably, when the amount of gas emissions exceeds the emission standard, the reaction module 2 may be accelerated to rotate to suck the exhaust gas exceeding the emission standard back into the reaction module 2 for re-filtering.
As shown in fig. 6, the reaction module 2 may be cylindrical; the disturbance adjusting mechanism comprises a gear hooped on the surface of the reaction module 2 and a rack meshed with the gear, and the gear is driven by a servo motor; the servo motor is controlled by the control module. The steering angle of the rotated reaction module 2 can be clearly obtained through the servo motor, and then the corresponding single plate included angle value is obtained.
As shown in fig. 7, the embodiment further relates to a method for testing the purification effect of the fluid flowing in the reverse direction of the SCR denitration system, which includes the following steps: step S1, setting a multilayer reaction module 2; step S2, rotationally arranging the reaction modules 2 in the middle layer, changing the included angle value of the single plate between the reaction modules 2 and the adjacent reaction modules 2, and further adjusting the disturbance amount of the airflow between the reaction modules 2 in each layer; step S3, detecting a gas purification amount by a gas detection sensor; and step S4, recording the included angle value of the single plate and gas purification data.
The reaction module is, for example and without limitation, a catalyst module, the gas detection sensor is, for example and without limitation, an ammonia detection sensor, the specific high-efficiency SCR denitration reaction system comprises a pipe body 1, a plurality of layers of reaction modules 2 are arranged along the inner wall of the pipe body, wherein at least one reaction module 2 positioned in the middle layer is arranged in a rotating mode, and a disturbance adjusting mechanism is arranged on the side edge of the reaction module 2; and an ammonia detection sensor is arranged at the outlet of the pipe body 1; the ammonia detection sensor sends the collected ammonia emission to the control module; the control module controls the disturbance adjusting mechanism to enable the corresponding reaction module 2 to rotate according to the ammonia emission so as to change the included angle value of the single plates of the reaction module 2 and the adjacent reaction module 2, further adjust the disturbance amount of the air flow between each layer of reaction module 2, obtain corresponding experimental data and provide data support for the arrangement of the reaction modules.
In the embodiment, the reaction module 2 at the first layer and the reaction module 2 at the last layer are fixedly arranged, the single-plate included angle value of the two is 0 degrees, N reaction modules 2 are arranged between the two, N is more than or equal to 2, and the N is independently controlled by a corresponding disturbance adjusting mechanism; in an initial state, the control module controls each disturbance adjusting mechanism to respectively adjust the corresponding reaction module 2 to rotate so as to enable the included angle value of the single plates of the adjacent reaction modules 2 to be 180 degrees/N +1, and the maximum disturbance quantity is obtained; and the control module changes the included angle value of each single plate according to the gas emission amount so as to reduce the disturbance amount and simultaneously keep the gas emission amount not to exceed the emission standard.
To sum up, the fluid flow velocity reverse disturbance purification test system and method for the SCR denitration system according to the present embodiment promote the reaction of nitrogen oxide in exhaust gas and ammonia gas through the plurality of layers of reaction modules 2, detect the ammonia concentration at the inlet and outlet through the first and second gas detection sensors, change the single plate included angle value between the single plates of the adjacent reaction modules 2 through the disturbance adjustment mechanism, and control the angle adjustment through the control module, thereby adjusting the air flow disturbance amount. The included angle value of the single plates between the adjacent reaction modules can be changed according to the reaction sufficiency and the reaction time, so that the disturbance quantity of the airflow between the reaction modules of each layer can be adjusted, the reaction can be fully performed in various environments, namely, the disturbance quantity is increased when the reaction is insufficient, the reaction time is prolonged, or the disturbance quantity is reduced when the reaction is sufficient, and the relevant emission test data is obtained.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. The utility model provides a fluid velocity of flow backward disturbance purifies test system for SCR deNOx systems which characterized in that includes:
a pipe body;
a plurality of layers of reaction modules are distributed along the inner wall of the pipe body, wherein at least one reaction module positioned in the middle layer adopts a rotary arrangement, and a disturbance adjusting mechanism is arranged on the side edge of the reaction module; and
the first gas detection sensor and the second gas detection sensor are arranged at the inlet and the outlet of the pipe body;
the first gas detection sensor and the second gas detection sensor send the nitrogen oxide content data of the inlet test gas and the nitrogen oxide content data of the outlet test gas to the control module to obtain the purification data of the nitrogen oxide;
the control module controls the disturbance adjusting mechanism to enable the corresponding reaction modules to rotate according to the purification data, adjusts the disturbance amount of airflow between each layer of reaction module, and records the single-plate included angle value and the purification data of the rotating reaction module and the adjacent reaction module;
the reaction module of the first layer and the reaction module of the last layer are fixedly arranged, the included angle value of the single plates of the first layer and the reaction module of the last layer is 0 degree, N reaction modules are arranged between the first layer and the reaction module of the last layer, N is more than or equal to 2, and the N is independently controlled by a corresponding disturbance adjusting mechanism;
in an initial state, the control module controls each disturbance adjusting mechanism to respectively adjust the corresponding reaction module to rotate so as to enable the included angle value of the single plates of the adjacent reaction modules to be 180 degrees/N +1, and the maximum disturbance quantity is obtained;
the control module changes the included angle value of each single plate according to the gas discharge amount so as to reduce the disturbance amount and simultaneously keep the gas discharge amount not to exceed the discharge standard.
2. The fluid flow rate reverse perturbation purge testing system of claim 1,
the tail edge of a single plate in the reaction module suitable for rotating is tilted to form a buffer fan blade;
when the gas emission exceeds the emission standard, the control module controls the disturbance adjusting mechanism to drive the reaction module to rotate, namely, the flow velocity of gas flowing out of the single plate in the reaction module is reduced after the buffer fan blades rotate.
3. The fluid flow rate reverse perturbation purge testing system of claim 2,
for a plurality of reaction modules suitable for rotating, the front edge of a single plate in the reaction module of the first layer is formed in a tilting mode to form a suction fan blade;
the tail edge of the veneer in the reaction module at the last layer is tilted to form a buffer fan blade;
when the gas emission amount exceeds the emission standard by 150%, the reaction modules of the first layer and the last layer rotate relatively to form an air compression cavity between the two reaction modules, so that the gas emission amount does not exceed the emission standard; or
When the gas emission is 100% -150% of the emission standard, the reaction module at the last layer rotates, namely the flow rate of gas flowing out of the single plate in the reaction module is reduced after the buffer fan blades rotate, so that the gas emission does not exceed the emission standard; or
When the gas emission is lower than the emission standard, the reaction module of the first layer is rotated to increase the gas flow rate and keep the gas emission not to exceed the emission standard.
4. The fluid flow rate reverse perturbation purge testing system of claim 1,
the reaction module is cylindrical;
the disturbance adjustment mechanism includes: the gear is hooped on the surface of the reaction module, and the rack is meshed with the gear, and the gear is driven by a servo motor;
the servo motor is controlled by the control module.
5. A fluid flow velocity reverse disturbance purification test method for an SCR denitration system is characterized by comprising the following steps:
step S1, setting a multilayer reaction module;
step S2, rotationally setting the reaction modules in the middle layer, changing the included angle value of the single plate between the reaction modules and the adjacent reaction modules, and further adjusting the disturbance amount of the airflow between the reaction modules in each layer;
step S3, detecting a gas purification amount by a gas detection sensor;
step S4, recording the included angle value of the single plate and the gas purification data;
the reaction module of the first layer and the reaction module of the last layer are fixedly arranged, the included angle value of the single plates of the first layer and the reaction module of the last layer is 0 degree, N reaction modules are arranged between the first layer and the reaction module of the last layer, N is more than or equal to 2, and the N is independently controlled by a corresponding disturbance adjusting mechanism;
in an initial state, the control module controls each disturbance adjusting mechanism to respectively adjust the corresponding reaction module to rotate so as to enable the included angle value of the single plates of the adjacent reaction modules to be 180 degrees/N +1, and the maximum disturbance quantity is obtained;
the control module changes the included angle value of each single plate according to the gas discharge amount so as to reduce the disturbance amount and simultaneously keep the gas discharge amount not to exceed the discharge standard.
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