CN117282542A - Dust removal system of coal unit and ash removal control method of coal unit - Google Patents
Dust removal system of coal unit and ash removal control method of coal unit Download PDFInfo
- Publication number
- CN117282542A CN117282542A CN202311289995.3A CN202311289995A CN117282542A CN 117282542 A CN117282542 A CN 117282542A CN 202311289995 A CN202311289995 A CN 202311289995A CN 117282542 A CN117282542 A CN 117282542A
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- Prior art keywords
- dust
- electric
- removal
- unit
- content
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- 239000000428 dust Substances 0.000 title claims abstract description 291
- 239000003245 coal Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000003546 flue gas Substances 0.000 claims abstract description 24
- 238000004140 cleaning Methods 0.000 claims abstract description 12
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 239000012716 precipitator Substances 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims 1
- 239000012717 electrostatic precipitator Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
- B03C3/025—Combinations of electrostatic separators, e.g. in parallel or in series, stacked separators, dry-wet separator combinations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/66—Applications of electricity supply techniques
- B03C3/68—Control systems therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/74—Cleaning the electrodes
- B03C3/76—Cleaning the electrodes by using a mechanical vibrator, e.g. rapping gear ; by using impact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/74—Cleaning the electrodes
- B03C3/76—Cleaning the electrodes by using a mechanical vibrator, e.g. rapping gear ; by using impact
- B03C3/763—Electricity supply or control systems therefor
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Electrostatic Separation (AREA)
Abstract
The invention provides a dust removal system of a coal unit and a dust removal control method of the coal unit, and relates to the technical field of dust removal equipment, wherein the dust removal system comprises: the dust removing unit group comprises a plurality of dust removing units; a multi-stage dust removal unit group is sequentially arranged in the dust removal pipeline along the flow direction of the flue gas; the dust measuring unit and the dust removing unit group are connected and arranged at the outlet of the dust removing pipeline and used for monitoring the dust content in the flue gas treated by the dust removing unit group. When the dust content at the outlet of the dust removing pipeline is lower than a preset dust content threshold value, cleaning the dust on each electric dust remover one by one, so that the normal operation of the whole coal unit dust removing system can be ensured; the voltage of the electric dust collector is gradually reduced, so that the dust falling from the electric dust collector per minute and the dust falling from the electric dust collector and flowing to the outlet of the dust collection pipeline along with the flue gas are less, and the dust content of the outlet of the dust collection pipeline is always lower than a preset dust content threshold value.
Description
Technical Field
The invention relates to the technical field of dust removal equipment, in particular to a dust removal system of a coal unit and a dust removal control method of the coal unit.
Background
The operation of the coal unit needs to burn a large amount of coal, and the incomplete combustion can cause the discharged flue gas to contain a large amount of dust particles, and the direct discharge can pollute the air, which is contrary to the carbon neutralization target under the large background.
Disclosure of Invention
Aiming at the problems, the invention provides a coal unit dust removal system capable of effectively removing dust particles in discharged flue gas and a dust removal control method of the coal unit.
In a first aspect, a coal unit dust removal system is provided, comprising:
the dust removing unit group comprises a plurality of dust removing units;
the dust removing pipeline is internally provided with a plurality of dust removing unit groups in sequence along the flow direction of the flue gas;
and the dust measuring unit is connected with the dust removing unit group and arranged at the outlet of the dust removing pipeline and used for monitoring the dust content in the flue gas treated by the dust removing unit group.
Further, each dust removing unit comprises a power supply, a controller, an electric dust collector and a vibrator;
the controller is respectively connected with the power supply, the electric dust collector and the vibrator, and is used for controlling the power supply to supply power to the electric dust collector and controlling the vibrator to beat the electric dust collector.
Further, the dust removal pipeline and the dust removal unit group form a dust removal subsystem;
at least two dust removal subsystems are arranged in parallel.
In a second aspect, a method for controlling ash removal of a coal unit is provided, including:
acquiring the dust content in the flue gas at the outlet of a dust removal pipeline;
and when the dust content is lower than a preset dust content threshold value, cleaning the dust adsorbed on each dust removing unit one by one.
Further, the dust adsorbed on each dust removal unit is cleaned one by one, including:
gradually reducing the voltage of the electric dust collector in the dust removing unit to 0%;
cleaning dust adsorbed on the electric dust remover;
after the dust adsorbed on the electric dust remover is cleaned, gradually increasing the voltage of the electric dust remover to rated voltage.
Further, the dust adsorbed on the electric dust remover is cleaned, comprising:
and starting the vibrator to beat the electric dust collector, so that dust adsorbed on the electric dust collector falls.
Further, the preset dust content threshold includes an instantaneous dust content threshold and/or an average dust content threshold over a preset period of time.
Further, the preset period is a preset continuous period of time before the instantaneous dust content is obtained.
Further, the instant dust containsThe amount was 3mg/Nm 3 The average dust content was 5mg/Nm 3 。
Further, the gradually reducing the voltage of the electric precipitator to 0%, includes:
and gradually reducing the voltage of the electric dust collector from the rated voltage to 0% in a preset step length.
One or more technical schemes provided by the application have at least the following technical effects or advantages:
when the dust content at the outlet of the dust removing pipeline is lower than a preset dust content threshold value, cleaning the dust on each electric dust remover one by one, so that the normal operation of the whole coal unit dust removing system can be ensured; the voltage of the electric dust collector is gradually reduced, so that the dust falling from the electric dust collector per minute and the dust falling from the electric dust collector and flowing to the outlet of the dust collection pipeline along with the flue gas are less, and the dust content of the outlet of the dust collection pipeline is always lower than a preset dust content threshold value.
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 may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a dust removal system of a coal unit according to an embodiment of the present invention;
fig. 2 is a schematic flow structure diagram of a method for controlling ash removal of a coal unit according to an embodiment of the invention.
Wherein: 1. the dust removal unit group, 2, the dust removal pipeline, 3, survey dirt unit.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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 apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is a schematic structural diagram of a dust removal system of a coal unit according to an embodiment of the present invention. As shown in fig. 1, the dust removing system of the coal unit provided by the invention comprises a dust removing unit group 1, a dust removing pipeline 2 and a dust measuring unit 3; the dust removing unit group 1 includes a plurality of dust removing units. The multi-stage dust removal unit group 1 is sequentially arranged in the dust removal pipeline 2 along the flow direction of the flue gas, and the dust measurement unit 3 is connected with the dust removal unit group 1 and is arranged at the outlet of the dust removal pipeline 2 and used for monitoring the dust content in the flue gas treated by the dust removal unit group 1.
In the embodiment, four dust removing units form a dust removing unit group 1, and the four dust removing units are uniformly distributed; a five-stage dust removing unit group 1 is arranged in the dust removing pipeline 2, and the five-stage dust removing unit groups 1 are distributed at equal intervals; therefore, twenty dust removal units are provided in total in each dust removal duct 2.
Each dust removing unit consists of a power supply, a controller, an electric dust collector and a vibrator. The controller is respectively and electrically connected with the power supply, the electric dust collector and the vibrator; the dust measuring unit 3 is electrically connected with the controller; the output end of the vibrator is closely arranged with the electric dust collector, so that the vibrator can knock the electric dust collector when working. The controller can control the power supply to supply power to the electric dust collector, so that the electric dust collector obtains stable voltage, and the voltage obtained by the electric dust collector can be increased or reduced. The controller can also control to supply power to the vibrator for controlling the opening or closing of the vibrator, and when the vibrator is opened, the electric dust collector can be knocked by the vibrator, so that dust adsorbed on the electric dust collector falls down.
The electrostatic precipitator adopts the structure among the prior art, and the electrostatic precipitator simply said includes positive plate and negative plate, is being connected the back at positive plate and negative plate and is forming the electric field at positive plate and negative plate, when the dust-laden flue gas passes through, the dust particle in the flue gas can adsorb on the negative plate.
In fig. 1, only the dust removing unit group 1 is schematically shown, and in practical application, only the electric dust collector and the vibrator are arranged in the dust removing pipeline 2, and the power supply and the controller are arranged outside the dust removing pipeline 2.
In this embodiment, the dust measurement unit 3 is a thermal dust measurement element, and in practical application, other elements may be selected as long as the dust content in the flue gas can be accurately detected.
In practical application, each flue gas dust removal system may include a plurality of dust removal subsystems, each dust removal subsystem including the dust removal pipeline 2 and the dust removal unit described in the above embodiment, and the plurality of dust removal subsystems are arranged in parallel. Wherein, the tail ends of the dust removing pipelines 2 can be communicated together to form a smoke outlet, and a dust measuring unit 3 is arranged at the smoke outlet; if the ends of the plurality of dust removing pipes 2 are not connected together to form one smoke outlet, the dust measuring unit 3 may be provided at each end of the dust removing pipes 2.
Fig. 2 is a schematic flow structure diagram of a method for controlling ash removal of a coal unit according to an embodiment of the invention. The embodiment of the invention also provides a dust removal control method of the coal unit, which comprises the following steps:
s201: and obtaining the dust content in the flue gas at the outlet of the dust removing pipeline.
Specifically, the dust content in the flue gas can be detected by a dust measuring unit (such as a thermal dust measuring element) arranged at the outlet of the dust removing pipeline, and the monitored dust content is fed back to the dust removing unit group. Specifically, the monitored dust content is fed back to the controller in the dust removal unit group.
S202: when the dust content is lower than a preset dust content threshold value, cleaning the dust adsorbed on each dust removing unit one by one.
In the whole coal unit dust removal system, a plurality of dust removal units are arranged, and each dust removal unit comprises a power supply, a controller, an electric dust collector and a vibrator; the controller is connected with the power supply, the electric dust collector and the vibrator respectively and is used for controlling the power supply to supply power to the electric dust collector and controlling the vibrator to beat the electric dust collector. When the dust is removed, a plurality of electric dust collectors are cleaned one by one, so that other electric dust collectors which do not carry out dust removal treatment can be guaranteed to continue to work, the normal operation of the whole coal unit dust removal system is guaranteed, and the dust content in the flue gas passing through the dust removal pipeline is lower than a preset dust content threshold value. In addition, because when carrying out the deashing to the electrostatic precipitator, can lead to adsorbing the partial dust on the electrostatic precipitator and can flow to the exit of dust removal pipeline along with the flue gas, clear up an electrostatic precipitator at every turn and can reduce this partial dust and flow to the exit content of dust removal pipeline, and then guarantee that the dust content of the export of dust removal pipeline is less than the dust content threshold value of predetermineeing all the time.
The preset dust content threshold comprises an instantaneous dust content threshold and/or an average dust content threshold over a preset period of time. Specifically, the preset dust content threshold may be an instantaneous dust content threshold, or an average dust content threshold over a preset period of time, or a combination of both.
The preset time period is a preset continuous time period before the instantaneous dust content is acquired, and specifically, the preset time period can be selected to be within one hour before the instantaneous dust content is acquired.
In this example, the instantaneous dust content was 3mg/Nm 3 Average dust content of 5mg/Nm 3 。
Cleaning dust adsorbed on each dust removing unit one by one specifically comprises the following steps:
the voltage of the electric dust collector in the dust collection unit is gradually reduced to 0%. Gradually reducing the voltage of the electric dust collector from rated voltage to 0% by a preset step length; specifically, the voltage of the dust removing unit is gradually reduced in a step of 5% per minute.
Gradually, slowly reduce electrostatic precipitator's voltage, make this electrostatic precipitator inhale can the ability gradually reduce, and then guarantee that every minute from the dust that the electrostatic precipitator dropped and drop and flow to the dust of the exit of dust removal pipeline along with the flue gas less, guarantee that the dust content of the export of dust removal pipeline is less than the dust content threshold value of predetermineeing all the time.
Cleaning dust adsorbed on the electric dust remover. The output end of the vibrator is close to the electric dust collector, and the vibrator is started to beat the electric dust collector, so that dust adsorbed on the electric dust collector falls. Because the voltage of the electric dust collector is reduced to 0%, the electric dust collector does not have an adsorption function, and therefore dust on the electric dust collector can shake off easily.
After the dust adsorbed on the electric dust remover is cleaned, the voltage of the electric dust remover is gradually increased to rated voltage, so that the electric dust remover and a corresponding dust removing unit recover dust removing capability.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
when the dust content at the outlet of the dust removing pipeline is lower than a preset dust content threshold value, cleaning the dust on each electric dust remover one by one, so that the normal operation of the whole coal unit dust removing system can be ensured; the voltage of the electric dust collector is gradually reduced, so that the dust falling from the electric dust collector per minute and the dust falling from the electric dust collector and flowing to the outlet of the dust collection pipeline along with the flue gas are less, and the dust content of the outlet of the dust collection pipeline is always lower than a preset dust content threshold value.
Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A coal unit dust removal system, comprising:
a dust removal unit group (1), the dust removal unit group (1) comprising a plurality of dust removal units;
the dust removing pipeline (2) is internally provided with a plurality of stages of dust removing unit groups (1) in sequence along the flow direction of the flue gas;
and the dust measurement unit (3) is connected with the dust removal unit group (1) and is arranged at the outlet of the dust removal pipeline (2) and used for monitoring the dust content in the flue gas treated by the dust removal unit group (1).
2. The coal unit dust removal system of claim 1, wherein each of the dust removal units comprises a power supply, a controller, an electric precipitator, and a rapper;
the controller is respectively connected with the power supply, the electric dust collector and the vibrator, and is used for controlling the power supply to supply power to the electric dust collector and controlling the vibrator to beat the electric dust collector.
3. The coal unit dust removal system of claim 1, wherein the dust removal pipeline (2) and the dust removal unit group (1) form a dust removal subsystem;
at least two dust removal subsystems are arranged in parallel.
4. The ash removal control method of the coal unit is characterized by comprising the following steps of:
acquiring the dust content in the flue gas at the outlet of a dust removal pipeline;
and when the dust content is lower than a preset dust content threshold value, cleaning the dust adsorbed on each dust removing unit one by one.
5. The ash removal control method according to claim 4, wherein said cleaning dust adsorbed on each dust removing unit one by one comprises:
gradually reducing the voltage of the electric dust collector in the dust removing unit to 0%;
cleaning dust adsorbed on the electric dust remover;
after the dust adsorbed on the electric dust remover is cleaned, gradually increasing the voltage of the electric dust remover to rated voltage.
6. The ash removal control method according to claim 5, wherein said cleaning the dust adsorbed on the electric precipitator comprises:
and starting the vibrator to beat the electric dust collector, so that dust adsorbed on the electric dust collector falls.
7. The ash control method of claim 5 wherein the preset dust content threshold comprises an instantaneous dust content threshold and/or an average dust content threshold over a preset period of time.
8. The ash removal control method as set forth in claim 7, wherein said preset time period is a preset continuous time period before said instantaneous dust content is obtained.
9. The ash removal control method according to claim 7, wherein said instantaneous dust content is 3mg/Nm 3 The average dust content was 5mg/Nm 3 。
10. The ash removal control method as set forth in claim 5, wherein said gradually decreasing the voltage of said electric precipitator to 0% comprises:
and gradually reducing the voltage of the electric dust collector from the rated voltage to 0% in a preset step length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311289995.3A CN117282542A (en) | 2023-09-28 | 2023-09-28 | Dust removal system of coal unit and ash removal control method of coal unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311289995.3A CN117282542A (en) | 2023-09-28 | 2023-09-28 | Dust removal system of coal unit and ash removal control method of coal unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117282542A true CN117282542A (en) | 2023-12-26 |
Family
ID=89244198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311289995.3A Pending CN117282542A (en) | 2023-09-28 | 2023-09-28 | Dust removal system of coal unit and ash removal control method of coal unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117282542A (en) |
-
2023
- 2023-09-28 CN CN202311289995.3A patent/CN117282542A/en active Pending
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