CN112569760A - Wet desulphurization adjustment slurry supply method - Google Patents
Wet desulphurization adjustment slurry supply method Download PDFInfo
- Publication number
- CN112569760A CN112569760A CN202011304072.7A CN202011304072A CN112569760A CN 112569760 A CN112569760 A CN 112569760A CN 202011304072 A CN202011304072 A CN 202011304072A CN 112569760 A CN112569760 A CN 112569760A
- Authority
- CN
- China
- Prior art keywords
- slurry
- slurry supply
- flue gas
- supply
- flue
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002002 slurry Substances 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 20
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000003546 flue gas Substances 0.000 claims abstract description 40
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 14
- 230000023556 desulfurization Effects 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 238000004364 calculation method Methods 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 6
- 235000019738 Limestone Nutrition 0.000 claims description 5
- 230000003750 conditioning effect Effects 0.000 claims description 5
- 239000006028 limestone Substances 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 239000003245 coal Substances 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012821 model calculation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Images
Classifications
-
- 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
- B01D53/77—Liquid phase processes
- B01D53/79—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
- B01D53/346—Controlling the process
-
- 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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a wet desulphurization adjustment slurry supply method, which comprises the following steps: 1) according to the operation requirement, the concentration C of sulfur dioxide in the flue gas of the outlet flue of the wet desulphurization system is setSO 2-setting(ii) a 2) Respectively obtaining the concentration C of sulfur dioxide in the flue gas at the inlet of the wet desulphurization system from the original measurement systemSO 2-progenAnd the concentration C of sulfur dioxide in the flue gas of the outlet flueSO 2-jingThe concentration C of sulfur dioxide in the flue gas of the outlet flue before unit timeSO 2-frontAnd a slurry supply flow rate value Q of the slurry supply systemSlurry supply-measurementFlue gas flow Q and slurry supply density rho of inlet flue of wet desulphurization system and slurry supply flow value QSlurry supply-measurementThe flue gas flow Q and the slurry density rho of an inlet flue of the desulfurization system are calculated; 3) calculating a slurry supply flow value; 4) calculating the flow rate and pulp supplyComparing the maximum output of the system, and if the maximum output is exceeded, reminding an operator; otherwise, the slurry supply flow of the slurry supply system is automatically adjusted.
Description
Technical Field
The invention belongs to the field of energy conservation and environmental protection, and relates to a wet desulphurization adjustment slurry supply method.
Background
Coal accounts for China90% of primary energy reserves, the energy consumption in China is mainly coal, and the total consumption of the coal accounts for about 75% of the primary energy consumption in China. A large amount of coal is combusted, SO that the typical soot type pollution appears in China, and the main pollutants comprise SO2. In order to deal with the problem of environmental pollution and reduce the emission of pollutants, the coal burning industry of China is mostly provided with a desulfurization environment-friendly facility. Among them, the wet desulfurization process is the most mature and widely used desulfurization technique.
In the wet desulfurization process, new slurry needs to be continuously supplemented to replace old slurry absorbing sulfur dioxide in the system. In the existing desulfurization process, the calculation of the slurry supply amount is almost manually adjusted according to the pH value of the old slurry by monitoring panel operators. Therefore, a large amount of manpower is consumed, and due to the factors such as the system reaction time, the conditions of slow reaction, fluctuation of pollutant discharge at an outlet and the like generally exist in the manually adjusted slurry supply system. Therefore, the adjustment of slurry supply in the wet desulphurization system is a technical problem.
Therefore, how to adjust the slurry supply by the related technical means to quickly and intelligently realize the slurry replacement work of the wet desulphurization system becomes a technical problem which needs to be solved by the technical personnel in the field.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a wet desulphurization adjustment slurry supply method, which can realize calculation and adjustment of slurry supply in a wet desulphurization system and realize stable discharge of outlet pollutants.
In order to achieve the purpose, the wet desulphurization adjustment slurry supply method comprises the following steps:
1) according to the operation requirement, the concentration C of sulfur dioxide in the flue gas of the outlet flue of the wet desulphurization system is setSO 2-setting；
2) Obtaining the concentration C of sulfur dioxide in flue gas of the inlet flue of the wet desulphurization systemSO 2-progenAnd the concentration C of sulfur dioxide in the flue gas of the outlet flueSO 2-jingAnd obtaining the historical sulfur dioxide concentration C of the flue gas of the outlet flueSO 2-front；
3) Obtaining the slurry supply flow rate value Q of the slurry supply systemSlurry supply-measurementThe flue gas flow Q and the slurry supply density rho of the inlet flue of the wet desulphurization system;
4) according to the set sulfur dioxide concentration CSO 2-settingAnd the concentration C of sulfur dioxide in the flue gas of the inlet flue of the wet desulphurization systemSO 2-progenAnd the concentration C of sulfur dioxide in the flue gas of the outlet flueSO 2-jingThen calculating the flow value of the slurry supply;
5) comparing the calculated slurry supply flow value with the maximum output of the slurry supply system, and sending out warning information to remind operating personnel when the calculated slurry supply flow value is greater than or equal to the maximum output of the slurry supply system; otherwise, automatically adjusting the pulp supply flow of the pulp supply system to the calculated pulp supply flow value.
Slurry supply flow rate QSupply of slurry-calculationComprises the following steps:
Qsupply of slurry-calculation＝QTheory of the invention+△Q
Wherein Q isTheory of the inventionThe theoretical pulp supply amount and the delta Q are the regulated flow.
Theoretical amount of stock supply QTheory of the inventionComprises the following steps:
wherein B is the solid content of the slurry, and D is the purity coefficient of limestone;
the regulated flow Δ Q is:
ΔQ＝[(CSO 2-setting-CSO 2-jing)+A1×(CSO 2-jing-CSO 2-front)]×A2
Wherein A is1For the delay adjustment factor, A2Is the pulp feed coefficient.
The solid content B of the slurry is as follows:
wherein ρ is a pulp supply density.
The invention has the following beneficial effects:
the wet desulphurization adjustment slurry supply method provided by the invention is characterized in that during specific operation, the historical flue gas sulfur dioxide concentration C introduced into the outlet flueSO 2-frontCalculating and calculating a pulp supply flow value, and sending out warning information to remind operating personnel when the calculated pulp supply flow value is greater than or equal to the maximum output of a pulp supply system; otherwise, automatically adjusting the pulp supply flow of the pulp supply system to the calculated pulp supply flow value, thereby achieving the purposes of automatic control of the pulp supply system and stable pollutant discharge.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the wet desulfurization conditioning slurry feeding method of the present invention comprises the steps of:
1) according to the operation requirement, the concentration C of sulfur dioxide in the flue gas of the outlet flue of the wet desulphurization system is setSO 2-setting；
2) Obtaining the concentration C of sulfur dioxide in flue gas of the inlet flue of the wet desulphurization systemSO 2-progenAnd the concentration C of sulfur dioxide in the flue gas of the outlet flueSO 2-jingAnd obtaining the historical sulfur dioxide concentration C of the flue gas of the outlet flueSO 2-front；
3) Obtaining the slurry supply flow rate value Q of the slurry supply systemSlurry supply-measurementThe flue gas flow Q and the slurry supply density rho of the inlet flue of the wet desulphurization system;
4) according to the set sulfur dioxide concentration CSO 2-settingAnd the concentration C of sulfur dioxide in the flue gas of the inlet flue of the wet desulphurization systemSO 2-progenAnd the concentration C of sulfur dioxide in the flue gas of the outlet flueSO 2-jingThen calculating the flow value of the slurry supply;
5) comparing the calculated slurry supply flow value with the maximum output of the slurry supply system, and sending out warning information to remind operating personnel when the calculated slurry supply flow value is greater than or equal to the maximum output of the slurry supply system; otherwise, automatically adjusting the pulp supply flow of the pulp supply system to the calculated pulp supply flow value.
Slurry supply flow rate QSupply of slurry-calculationComprises the following steps:
Qsupply of slurry-calculation＝QTheory of the invention+△Q
Wherein Q isTheory of the inventionThe theoretical pulp supply amount and the delta Q are the regulated flow.
Theoretical amount of stock supply QTheory of the inventionComprises the following steps:
wherein B is the solid content of the slurry, and D is the purity coefficient of limestone;
the regulated flow Δ Q is:
ΔQ＝[(CSO 2-setting-CSO 2-jing)+A1×(CSO 2-jing-CSO 2-front)]×A2
Wherein A is1For the delay adjustment factor, A2Is the pulp feed coefficient.
The solid content B of the slurry is as follows:
wherein ρ is a pulp supply density.
Example one
Selecting a certain power plant in China as an example, wherein a certain 330MW unit of the plant is a subcritical boiler produced by a Harbin boiler plant, a set of wet limestone-gypsum method flue gas desulfurization system is constructed in a matched manner, sulfur dioxide in flue gas at the tail parts of the two boilers is removed by adopting a limestone-gypsum wet method flue gas desulfurization process, and the flue gas volume at the inlet of the desulfurization system is 1211221m under the design condition3H (standard, dry, 6% O)2)。
Firstly, the operator sets the concentration C of sulfur dioxide in flue gas in an outlet flue of a wet desulphurization system according to the operation requirementSO 2-settingIs 25mg/m3. Data acquisition to wet desulphurization system inlet through original DCS systemFlue gas sulfur dioxide concentration C of flueSO 2-progenAnd the concentration C of sulfur dioxide in the flue gas of the outlet flueSO 2-jingThe concentration C of sulfur dioxide in the flue gas of the outlet flue before unit timeSO 2-frontAnd a slurry supply flow rate value Q of the slurry supply systemSlurry supply-measurementFlue gas flow Q and slurry supply density rho of inlet flue of wet desulphurization system, and slurry supply flow value Q of slurry supply systemSlurry supply-measurementAnd (3) participating in model calculation of flue gas flow Q and slurry density rho of an inlet flue of the desulfurization system.
The calculated slurry supply amount is 20.8t/h, the limestone slurry system is correspondingly adjusted, and the concentration C of the sulfur dioxide in the flue gas of the outlet flue is adjusted after the limestone slurry system runs for 2 minutesSO 2-jingFrom 33mg/m3Down to 29mg/m3And the adjusted result is re-substituted into the calculated pulp supply amount to be 19.9 t/h. After 10 minutes of adjustment, the concentration C of sulfur dioxide in the flue gas of the outlet flueSO 2-jingStabilized at 25mg/m of set3And performing iterative calculation according to the inlet flue gas volume, inlet concentration and other parameter changes, and reapplying the calculation result to the pulp supply adjustment to realize automatic control.
Claims (5)
1. A wet desulfurization conditioning slurry feed method, comprising the steps of:
1) according to the operation requirement, the concentration C of sulfur dioxide in the flue gas of the outlet flue of the wet desulphurization system is setSO 2-setting；
2) Obtaining the concentration C of sulfur dioxide in flue gas of the inlet flue of the wet desulphurization systemSO 2-progenAnd the concentration C of sulfur dioxide in the flue gas of the outlet flueSO 2-jingAnd obtaining the historical sulfur dioxide concentration C of the flue gas of the outlet flueSO 2-front；
3) Obtaining the slurry supply flow rate value Q of the slurry supply systemSlurry supply-measurementThe flue gas flow Q and the slurry supply density rho of the inlet flue of the wet desulphurization system;
4) according to the set sulfur dioxide concentration CSO 2-settingAnd the concentration C of sulfur dioxide in the flue gas of the inlet flue of the wet desulphurization systemSO 2-progenAnd the concentration C of sulfur dioxide in the flue gas of the outlet flueSO 2-jingThen calculating the flow value of the slurry supply;
5) comparing the calculated slurry supply flow value with the maximum output of the slurry supply system, and sending out warning information to remind operating personnel when the calculated slurry supply flow value is greater than or equal to the maximum output of the slurry supply system; otherwise, automatically adjusting the pulp supply flow of the pulp supply system to the calculated pulp supply flow value.
2. The method of claim 1, wherein the flow rate Q of the slurry supply is adjustedSupply of slurry-calculationComprises the following steps:
Qsupply of slurry-calculation＝QTheory of the invention+△Q
Wherein Q isTheory of the inventionThe theoretical pulp supply amount and the delta Q are the regulated flow.
3. The wet desulfurization conditioning slurry feeding method of claim 2, characterized in that the theoretical slurry feed amount QTheory of the inventionComprises the following steps:
wherein, B is the solid content of the slurry, and D is the purity coefficient of limestone.
4. The method for supplying a conditioning slurry for wet desulfurization according to claim 2, characterized in that the conditioning flow Δ Q is:
ΔQ＝[(CSO 2-setting-CSO 2-jing)+A1×(CSO 2-jing-CSO 2-front)]×A2
Wherein A is1For the delay adjustment factor, A2Is the pulp feed coefficient.
5. The method of claim 3, wherein the slurry contains solid B:
wherein ρ is a pulp supply density.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011304072.7A CN112569760A (en) | 2020-11-19 | 2020-11-19 | Wet desulphurization adjustment slurry supply method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011304072.7A CN112569760A (en) | 2020-11-19 | 2020-11-19 | Wet desulphurization adjustment slurry supply method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112569760A true CN112569760A (en) | 2021-03-30 |
Family
ID=75122906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011304072.7A Pending CN112569760A (en) | 2020-11-19 | 2020-11-19 | Wet desulphurization adjustment slurry supply method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112569760A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114653178A (en) * | 2022-04-07 | 2022-06-24 | 南方电网电力科技股份有限公司 | Desulfurization tower slurry supply control method and system |
| CN115970476A (en) * | 2023-01-16 | 2023-04-18 | 西安热工研究院有限公司 | Automatic slurry supply control method for desulfurization island based on DCS control system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0910547A (en) * | 1995-06-26 | 1997-01-14 | Mitsubishi Heavy Ind Ltd | Wet type flue gas desulfurization device and flue gas treatment facilities |
| CN111229010A (en) * | 2020-01-19 | 2020-06-05 | 福建龙净环保股份有限公司 | Opening control system and opening control method of slurry supply regulating valve |
| CN210699477U (en) * | 2019-09-12 | 2020-06-09 | 华电国际电力股份有限公司邹县发电厂 | Device for adjusting desulfurization slurry supply flow rate by adding feedforward to single PID loop |
-
2020
- 2020-11-19 CN CN202011304072.7A patent/CN112569760A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0910547A (en) * | 1995-06-26 | 1997-01-14 | Mitsubishi Heavy Ind Ltd | Wet type flue gas desulfurization device and flue gas treatment facilities |
| CN210699477U (en) * | 2019-09-12 | 2020-06-09 | 华电国际电力股份有限公司邹县发电厂 | Device for adjusting desulfurization slurry supply flow rate by adding feedforward to single PID loop |
| CN111229010A (en) * | 2020-01-19 | 2020-06-05 | 福建龙净环保股份有限公司 | Opening control system and opening control method of slurry supply regulating valve |
Non-Patent Citations (3)
| Title |
|---|
| 姚媛: "浅谈湿法烟气脱硫系统的控制及就地测量仪表的选型", 《电力学报》 * |
| 张贯廷等: "湿法脱硫系统运行方式优化研究", 《经贸实践》 * |
| 彭国富等: "湿法烟气脱硫石灰石供浆泵控制优化研究", 《工业仪表与自动化装置》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114653178A (en) * | 2022-04-07 | 2022-06-24 | 南方电网电力科技股份有限公司 | Desulfurization tower slurry supply control method and system |
| CN115970476A (en) * | 2023-01-16 | 2023-04-18 | 西安热工研究院有限公司 | Automatic slurry supply control method for desulfurization island based on DCS control system |
| CN115970476B (en) * | 2023-01-16 | 2024-06-11 | 西安热工研究院有限公司 | Automatic slurry supply control method for desulfurization island based on DCS control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112569760A (en) | Wet desulphurization adjustment slurry supply method | |
| CN109092045B (en) | Limestone-gypsum method flue gas desulfurization slurry oxidation control method | |
| CN100453430C (en) | Energy saving method of granular material pneumatic conveying system and its device | |
| CN113457402A (en) | Efficient composite slurry supply method for desulfurizing tower | |
| CN113075913B (en) | Dynamic energy-saving control method for ash conveying system of coal-fired power plant based on actual coal quality parameters | |
| CN201764529U (en) | Online real-time powder flow monitoring system | |
| CN208482253U (en) | A kind of two furnaces, two tower desulfurization oxidation wind system central control device | |
| CN111338409A (en) | Universal desulfurization dust removal energy-saving optimization control system | |
| CN111408243B (en) | Wet desulfurization pH value control system and method for thermal power generating unit | |
| CN112058079A (en) | SCR inlet NO based on index prediction modelXConcentration prediction system and method | |
| CN216361286U (en) | External hanging type desulfurization closed loop optimization control system | |
| CN114838351B (en) | Automatic control method for desulfurization in circulating fluidized bed boiler | |
| CN216825636U (en) | Automatic control device of wet flue gas desulfurization system | |
| CN113457396B (en) | Automatic ammonia spraying control method based on SCR denitration control system of thermal power plant | |
| CN112957887B (en) | Full-automatic ammonia adding method and system for ammonia desulphurization device | |
| CN202660524U (en) | Load regulating device of coal water slurry steam boiler | |
| CN208482258U (en) | A kind of furnace double tower double circulation desulphurization oxidation wind system central control device | |
| CN212680621U (en) | Deacidification atomizer feed control system | |
| CN201909989U (en) | Automatically-controlled energy-saving system of boiler | |
| CN211902830U (en) | Adjustable working medium flow type coal economizer | |
| CN114307571A (en) | Novel carbide slag slurry supply system and method | |
| CN114895555A (en) | Coal-fired unit furnace coal holographic input environmental protection system optimization method | |
| CN209828684U (en) | System for circularly combining desulfurization and ozone preoxidation denitration by using sintering flue gas | |
| CN221156967U (en) | Wet-milling pulping system | |
| Bing et al. | Study on Performance Optimization of Wet Desulfurization of an Ultra-low Emission Coal-fired Power Unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210330 |