CN219607105U - Prediction and early warning control system for dioxin emission generated by waste incineration - Google Patents
Prediction and early warning control system for dioxin emission generated by waste incineration Download PDFInfo
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- CN219607105U CN219607105U CN202223022850.0U CN202223022850U CN219607105U CN 219607105 U CN219607105 U CN 219607105U CN 202223022850 U CN202223022850 U CN 202223022850U CN 219607105 U CN219607105 U CN 219607105U
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Abstract
The utility model discloses a system for predicting and early warning dioxin emission in waste incineration power generation, which comprises the following components: the device comprises a dioxin measuring point arranged at a horizontal flue at a chimney inlet, a cloth bag differential pressure measuring point and an active carbon adding measuring point arranged at a dust remover, an inhibitor adding measuring point arranged at an air preheater outlet, a blanking fan frequency measuring point arranged at a blanking fan, a hearth temperature measuring point arranged at a combustion chamber, a secondary air measuring point arranged on a secondary air pipeline and a primary air quantity measuring point arranged on a primary air pipeline. According to the utility model, the addition amount of the activated carbon and the cloth bag differential pressure are adjusted in real time according to the changes of the fuel property, the combustion working condition and the like, and the method is mainly applied to monitoring the fuel property and the combustion parameters of the boiler in the garbage incineration process, so as to realize the predictive early warning of the generation of dioxin.
Description
Technical Field
The utility model belongs to the field of garbage power generation, and mainly relates to a system for predicting and early warning dioxin emission in garbage incineration power generation.
Background
The current atmospheric pollutants are mainly by-products of various industrial production, and dioxin is a typical pollutant in the pollutants and has extremely strong toxicity and carcinogenicity, and is called as 'the most toxic poison on earth'. The toxicity of the material is 130 times of cyanide and 900 times of arsenic, the material has stable property and can only be synthesized by artificial chemistry, among various sources for producing dioxin, the dioxin produced by urban household garbage has the highest attention, and the mechanism for producing the dioxin by incineration is complex and is focused by various researchers. Along with the development of the economic society in China, the standard of dioxin emission is also becoming stricter, and the current national standard is 0.1ng/Nm 3 。
Since the waste incineration power plant generates electricity by using the heat energy obtained by the waste incineration, the dioxin generated by the waste incineration power plant is more, and in order to respond to the national environmental protection call, pollutants discharged into the atmosphere from the power plant chimney are required to be eliminated. At present, a more accurate method for detecting the content of dioxin is to use a high-precision chemical instrument to detect samples by a professional institution or laboratory, and compared with a power plant running for a long time, the method can be used for detecting the emission of pollutants regularly, but the economical efficiency of the operation of the power plant is greatly reduced.
Disclosure of Invention
The utility model aims to solve the defects in the prior art and provides a system for predicting and early warning dioxin emission in waste incineration power generation.
In order to achieve the above purpose, the present utility model provides a system for predicting and pre-warning dioxin emission in garbage incineration power generation, comprising: the device comprises a dioxin measuring point arranged at a horizontal flue at a chimney inlet, a cloth bag differential pressure measuring point and an active carbon adding measuring point arranged at a dust remover, an inhibitor adding measuring point arranged at an air preheater outlet, a blanking fan frequency measuring point arranged at a blanking fan, a hearth temperature measuring point arranged at a combustion chamber, a secondary air measuring point arranged on a secondary air pipeline and a primary air quantity measuring point arranged on a primary air pipeline.
And the relevant factors influencing the generation of the dioxin are collected, and the prediction and the early warning are carried out on the dioxin in real time, so that the running operation is guided, the dioxin emission is controlled, and the closed-loop guiding control is formed.
The garbage incineration power generation dioxin emission prediction and early warning control system also comprises a control cabinet, a DCS engineer station and a dioxin monitoring operation station; the dioxin measuring point, the cloth bag differential pressure measuring point, the active carbon adding measuring point, the inhibitor adding measuring point, the frequency measuring point of the blanking fan, the hearth temperature measuring point, the secondary air measuring point and the primary air quantity measuring point are respectively led into the control cabinet through shielding cables (4-20 mA current signals); the control cabinet is connected with the DCS engineer station through a twisted pair (Ethernet communication); the DCS engineer station is connected to a dioxin monitoring station via twisted pair (OPC or Modbus communication).
Furthermore, a dioxin analyzer is adopted for dioxin measuring points, and the change of the generation amount of the high-temperature section of the dioxin is monitored in real time.
The bag differential pressure measuring point adopts a pressure sensor to monitor the bag differential pressure in real time.
The activated carbon adding measuring point adopts a weighing sensor to monitor the input amount of the activated carbon in real time.
The inhibitor adding measuring point adopts a weighing sensor, and the adding amount of the inhibitor is monitored in real time.
The frequency measuring point of the blanking fan adopts a motor frequency sensor to monitor the garbage amount entering the hearth in real time.
The temperature sensor is used for measuring the temperature of the hearth, and the temperature of the combustion chamber is monitored in real time.
The secondary air measuring point adopts an air quantity sensor, and the primary air quantity measuring point adopts an air quantity sensor to monitor the primary air quantity and the secondary air quantity in real time.
Compared with the prior art, the utility model has the following advantages:
the existing dioxin emission control is adjusted according to the feedback value, so that the hysteresis is large, and the adjusting effect is poor; according to the utility model, the addition amount of the activated carbon and the cloth bag differential pressure are adjusted in real time according to the changes of the fuel property, the combustion working condition and the like, and the method is mainly applied to monitoring the fuel property and the combustion parameters of the boiler in the garbage incineration process, so as to realize the predictive early warning of the generation of dioxin. The method can predict and early warn for the generation of the dioxin, so that the addition amount of the inhibitor is adjusted, the emission of the dioxin is controlled in advance, the environmental protection requirement is met, the boiler is operated in a relatively efficient state, and the environmental protection, safety and economy of unit operation are improved.
Drawings
FIG. 1 is a schematic diagram of a system for predicting and early warning dioxin emission in waste incineration power generation;
in the figure, 1-dioxin measuring points, 2-cloth bag differential pressure measuring points, 3-activated carbon adding measuring points, 4-inhibitor adding measuring points, 5-blanking fan frequency measuring points, 6-hearth temperature measuring points, 7-secondary air measuring points, 8-primary air quantity measuring points, 9-control cabinets, 10-DCS engineer stations, 11-dioxin monitoring operation stations, 12-shielding cables, 13-twisted pair wires, 14-combustion chambers, 15-dust collectors and 16-chimneys.
Description of the embodiments
The present utility model will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the system for predicting and early warning dioxin emission generated by garbage incineration of the utility model comprises: the device comprises a dioxin measuring point 1 arranged at a horizontal flue at the inlet of a chimney 16, a cloth bag differential pressure measuring point 2 and an active carbon adding measuring point 3 arranged at a dust remover 15, an inhibitor adding measuring point 4 arranged at the outlet of an air preheater, a blanking fan frequency measuring point 5 arranged at a blanking fan, a hearth temperature measuring point 6 arranged at a combustion chamber 14, a secondary air measuring point 7 arranged on a secondary air pipeline and a primary air measuring point 8 arranged on a primary air pipeline. The above measuring points are led into an electronic control cabinet 9 through a shielding cable 12 (4-20 mA current signal); the control cabinet 9 sends the measured point data to the DCS engineer station 10 through a twisted pair 13 (Ethernet communication); the DCS engineer station 10 feeds station site data to the dioxin monitoring station 11 via twisted pair 13 (OPC or Modbus communication).
Since the amount of waste entering the hearth, the temperature of the hearth and the residence time of the flue gas in the hearth are important factors affecting the generation amount and the elimination rate of the high Wen Duaner dioxin, in a high-temperature section, firstly, the amount of waste entering the hearth is determined according to the frequency of a discharging fan (data are collected in real time by a frequency measuring point 5 of the discharging fan), secondly, the addition amount of an inhibitor is timely adjusted according to the primary air quantity (data are collected in real time by a primary air quantity measuring point 8), the secondary air quantity (data are collected in real time by a secondary air quantity measuring point 7), the temperature of a combustion chamber (data are collected in real time by a temperature measuring point 6 of the hearth) and the residence time of the flue gas in the hearth.
In the flue gas purification system, a flue gas purification mode of activated carbon and cloth bag dust removal is adopted, and the addition amount of activated carbon (data are collected in real time at an activated carbon addition measuring point 3) and the cloth bag differential pressure (data are collected in real time at a cloth bag differential pressure measuring point 2) have important influences on dioxin elimination. When the input amount of the activated carbon is low or the cloth bag differential pressure is too large and too small, the content of dioxin at the outlet of the chimney is obviously increased, and the change of the dioxin emission is predicted and early-warned according to the input amount of the activated carbon, the cloth bag differential pressure and other parameters.
The method is applied to monitoring the fuel property and the combustion parameters of the boiler in the garbage incineration process, the prediction and early warning of the generation of the dioxin are realized, the addition amount of the inhibitor is timely adjusted according to the prediction and early warning of the generation of the dioxin, so that the emission of the dioxin is controlled in advance, the environmental protection requirement is met, the boiler is operated in a relatively efficient state, and the environmental protection, safety and economy of the unit operation are improved.
Claims (2)
1. The system for predicting and early warning the dioxin emission of the waste incineration power generation is characterized by comprising the following components: a dioxin measuring point arranged at a horizontal flue at a chimney inlet, a cloth bag differential pressure measuring point and an active carbon adding measuring point arranged at a dust remover, an inhibitor adding measuring point arranged at an air preheater outlet, a blanking fan frequency measuring point arranged at a blanking fan, a hearth temperature measuring point arranged at a combustion chamber, a secondary air measuring point arranged on a secondary air pipeline and a primary air quantity measuring point arranged on a primary air pipeline; the waste incineration power generation dioxin emission prediction and early warning control system also comprises a control cabinet, a DCS engineer station and a dioxin monitoring operation station; the dioxin measuring point, the cloth bag differential pressure measuring point, the activated carbon adding measuring point, the inhibitor adding measuring point, the frequency measuring point of the discharging fan, the hearth temperature measuring point, the secondary air measuring point and the primary air quantity measuring point are respectively led into the control cabinet through shielding cables; the control cabinet is connected with the DCS engineer station through a twisted pair; the DCS engineer station is connected with the dioxin monitoring operation station through twisted pair wires.
2. The system for predicting and early warning the emission of dioxin generated by garbage incineration according to claim 1, wherein a dioxin analyzer is adopted at the dioxin measuring point, a pressure sensor is adopted at the cloth bag differential pressure measuring point, a weighing sensor is adopted at the activated carbon adding measuring point, a weighing sensor is adopted at the inhibitor adding measuring point, a motor frequency sensor is adopted at the blanking fan frequency measuring point, a temperature sensor is adopted at the hearth temperature measuring point, an air quantity sensor is adopted at the secondary air measuring point, and an air quantity sensor is adopted at the primary air quantity measuring point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223022850.0U CN219607105U (en) | 2022-11-15 | 2022-11-15 | Prediction and early warning control system for dioxin emission generated by waste incineration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223022850.0U CN219607105U (en) | 2022-11-15 | 2022-11-15 | Prediction and early warning control system for dioxin emission generated by waste incineration |
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| Publication Number | Publication Date |
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| CN219607105U true CN219607105U (en) | 2023-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223022850.0U Active CN219607105U (en) | 2022-11-15 | 2022-11-15 | Prediction and early warning control system for dioxin emission generated by waste incineration |
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| CN (1) | CN219607105U (en) |
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2022
- 2022-11-15 CN CN202223022850.0U patent/CN219607105U/en active Active
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