CN112943636B - Rapid starting method for circulating pump of wet desulphurization system - Google Patents
Rapid starting method for circulating pump of wet desulphurization system Download PDFInfo
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- CN112943636B CN112943636B CN202110134413.9A CN202110134413A CN112943636B CN 112943636 B CN112943636 B CN 112943636B CN 202110134413 A CN202110134413 A CN 202110134413A CN 112943636 B CN112943636 B CN 112943636B
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- circulating pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—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 by absorption
- B01D53/1412—Controlling the absorption process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—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 by absorption
- B01D53/1456—Removing acid components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0077—Safety measures
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to the technical field of use of a circulating pump in wet desulphurization, in particular to a method for quickly starting the circulating pump of a wet desulphurization system, which comprises the circulating pump, a standby pump quick start preparation and a circulating pump start sequence control program, wherein the standby pump quick start preparation comprises automatic cleaning of the standby pump and water injection and pressure maintaining, the water injection height is lower than the liquid level of an absorption tower, namely the inlet pressure of the pump is 70-100KPa, the starting torque is large due to the reversion of an impeller of the circulating pump during starting, an alarm is given when the pressure change in unit time after water injection is larger than a set value, and the circulating pump start sequence control program comprises a starting program execution step sequence and a step sequence execution completion judgment condition. The rapid starting method of the circulating pump of the wet desulphurization system can automatically flush the circulating pump after the circulating pump stops running, so that the impeller and the pipeline are not blocked by slurry and are in a standby state, the circulating pump is started in an automatic mode, manual intervention is not needed, and the rapid starting can be realized.
Description
Technical Field
The invention relates to the technical field of use of a circulating pump in wet desulphurization, in particular to a method for quickly starting the circulating pump of a wet desulphurization system.
Background
Wet flue gas desulfurization is under normal production conditions, desulfurization system need can start a slurry circulating pump at any time and deal with emergency, the circulating pump that current desulfurization system was equipped with is the 6kV charge pump, need manual barring when starting, check that the circulating pump has the jam, lack abnormal conditions such as water seal, still need to carry out manual operation to equipment such as circulating pump entry door, the discharge door, wash the water gate, it is consuming time and hard, hardly realize quick urgent start, when this kind of condition leads to desulfurization system to possess low-cost single pump running condition, also dare not really single pump operation, because in case single pump operation unexpected tripping operation, the reserve pump can not in time start, lead to the accident to spray not move, hot flue gas can get into the absorption tower, cause the interior defroster of tower and spray the layer to melt deformation damage, therefore, design a wet flue gas desulfurization system circulating pump quick start-up method, it is urgent need to circulating pump use technical field in current wet flue gas desulfurization.
Disclosure of Invention
The invention provides a method for quickly starting a circulating pump of a wet desulphurization system, which aims to solve the problems in the prior art.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
according to the embodiment of the invention, the method for quickly starting the circulating pump of the wet desulphurization system comprises the circulating pump, a standby pump quick start preparation and a circulating pump start sequence control program, wherein the standby pump quick start preparation comprises the automatic cleaning and water injection and pressure maintaining of the standby pump, the water injection height is lower than the liquid level of an absorption tower, namely the inlet pressure of the pump is 70-100KPa, the starting torque is prevented from being large due to the reversal of an impeller of the circulating pump during starting, an alarm is given when the pressure change in unit time after water injection is greater than a set value, and the circulating pump start sequence control program comprises a starting program execution step sequence and a step sequence execution completion judgment condition, wherein the starting program execution step sequence is as follows:
step1: automatically closing an electric door at the inlet of the circulating pump;
step2: automatically closing the discharge electric door of the circulating pump;
step3: automatically closing a circulating pump washing water electric door;
step4: automatically opening an inlet electric door of the circulating pump;
step5: starting a circulating pump;
the step execution completion judgment condition is as follows:
step1: the feedback of the circulating pump inlet electric door is '1' when closed, and the feedback of the circulating pump inlet electric door is '0' when opened;
step2: the feedback of the circulating pump discharge electric door is '1' when closed, and the feedback of the circulating pump discharge electric door is '0' when opened;
step3: the feedback of the circulating pump washing water electric door is '1' when closed, and the feedback of the circulating pump washing water electric door is '0' when opened;
step4: the feedback of the circulating pump inlet electric door is '0' when closed, and the feedback of the circulating pump inlet electric door is '1' when opened;
step5: and (5) the circulating pump starts to switch to the state and feeds back to '1' to finish all starting programs.
Further, the starting permission condition in the circulating pump starting sequence control program is that the liquid level of the desulfurizing tower is normal, and meanwhile, the standby pump is automatically cleaned normally.
Further, when the Step1-Step4 fails in the Step of judging the execution Step and the execution completion of the Step of the starting program, the judgment condition for the execution Step and the execution completion of the Step of the starting program is interrupted and an alarm is given, the judgment condition for the execution Step and the execution completion of the Step of the starting program is re-executed after the failure is eliminated, and when the judgment condition for the execution Step and the execution completion of the Step of the starting program is executed to the Step5 failure, the judgment condition for the execution Step and the execution completion of the Step of the starting program is automatically reset, the entrance is automatically closed, and the standby pump is cleaned again.
The invention has the following advantages:
the rapid starting method of the circulating pump of the wet desulphurization system can automatically flush the circulating pump after the circulating pump stops running, SO that an impeller and a pipeline are not blocked by slurry and are in a standby state, the circulating pump is started in an automatic mode, manual intervention is not needed, the rapid starting can be realized, the wet desulphurization system can prevent environmental protection parameters (SO 2) from exceeding standards by rapidly starting the standby pump, and safety protection measures can be provided for a single-pump running mode.
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. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope of the present invention.
FIG. 1 is a first logic diagram for the on-control of a circulation pump of the present invention;
fig. 2 is a second logic diagram for the on-control of the circulation pump of the present invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.
The invention provides a technical scheme that:
a rapid starting method for a circulating pump of a wet desulphurization system comprises the steps of the circulating pump, a standby pump, a rapid starting preparation for the standby pump and a starting sequential control program for the circulating pump, wherein the rapid starting preparation for the standby pump comprises the steps of automatic cleaning and water injection pressure maintaining for the standby pump, the water injection height is lower than the liquid level of an absorption tower, namely, the inlet pressure of the pump is 70-100KPa, the starting torque is large due to the reversal of an impeller of the circulating pump during starting, the alarm prompt is given when the pressure change in unit time after water injection is greater than a set value, the starting sequential control program for the circulating pump comprises a starting program execution step sequence and a step sequence execution completion judgment condition, and the starting program execution step sequence is as follows:
step1: automatically closing an electric door at the inlet of the circulating pump;
step2: automatically closing the discharge electric door of the circulating pump;
step3: automatically closing a circulating pump washing water electric door;
step4: automatically opening an inlet electric door of the circulating pump;
step5: starting a circulating pump;
the step execution completion judgment condition is as follows:
step1: the feedback of the circulating pump inlet electric door is '1' when closed, and the feedback of the circulating pump inlet electric door is '0' when opened;
step2: the feedback of the circulating pump discharge electric door is '1' when closed, and the feedback of the circulating pump discharge electric door is '0' when opened;
step3: the feedback of the circulating pump washing water electric door is '1' when closed, and the feedback of the circulating pump washing water electric door is '0' when opened;
step4: the feedback of the circulating pump inlet electric door is '0' when closed, and the feedback of the circulating pump inlet electric door is '1' when opened;
step5: and (5) the circulating pump starts to switch to the state and feeds back to '1' to finish all starting programs.
In the invention: the starting permission condition in the circulating pump starting sequence control program is that the liquid level of the desulfurizing tower is normal, and meanwhile, the standby pump is automatically cleaned normally.
In the invention: when the Step1-Step4 of the starting program execution Step and Step execution completion judgment condition is failed, the starting program execution Step and Step execution completion judgment condition is interrupted and an alarm is given, the starting program execution Step and Step execution completion judgment condition is re-executed after the failure is eliminated, and when the starting program execution Step and Step execution completion judgment condition is executed to the Step5 failure, the starting program execution Step and Step execution completion judgment condition is automatically reset, the entry door is automatically closed, and the standby pump is cleaned again.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (2)
1. The utility model provides a wet flue gas desulfurization system circulating pump quick start method, includes circulating pump, stand-by pump quick start preparation and circulating pump start sequence control procedure, its characterized in that: the preparation method comprises the steps of automatic cleaning of the standby pump and water injection and pressure maintaining, the water injection height is lower than the liquid level of the absorption tower, namely the inlet pressure of the pump is 70-100KPa, the starting torque is large due to the fact that the impeller of the circulating pump rotates reversely when the standby pump is started, the pressure after water injection is alarmed and prompted when the pressure change in unit time is larger than a set value, the starting sequence control program of the circulating pump comprises the conditions of starting program execution step sequence and step sequence execution completion judgment, wherein the starting program execution step sequence is as follows:
step1: automatically closing an electric door at the inlet of the circulating pump;
step2: automatically closing a circulating pump discharge electric door;
step3: automatically closing a circulating pump washing water electric door;
step4: automatically opening an electric door at the inlet of the circulating pump;
step5: starting a circulating pump;
the step execution completion judgment condition is as follows:
step1: the feedback of the circulating pump inlet electric door is '1' when closed, and the feedback of the circulating pump inlet electric door is '0' when opened;
step2: the feedback of the circulating pump discharge electric door is '1' when closed, and the feedback of the circulating pump discharge electric door is '0' when opened;
step3: the feedback of the circulating pump washing water electric door is '1' when closed, and the feedback of the circulating pump washing water electric door is '0' when opened;
step4: the feedback of the circulating pump inlet electric door is '0' when closed, and the feedback of the circulating pump inlet electric door is '1' when opened;
step5: the circulating pump starts and changes the state to feed back "1", finish all starting programs;
when the Step1-Step4 of the starting program execution Step and Step execution completion judgment condition is failed, the starting program execution Step and Step execution completion judgment condition is interrupted and an alarm is given, the starting program execution Step and Step execution completion judgment condition is re-executed after the failure is eliminated, and when the starting program execution Step and Step execution completion judgment condition is executed to the Step5 failure, the starting program execution Step and Step execution completion judgment condition is automatically reset, the entry door is automatically closed, and the standby pump is cleaned again.
2. The rapid starting method of the circulating pump of the wet desulphurization system according to claim 1, characterized in that: the starting permission condition in the circulating pump starting sequence control program is that the liquid level of the desulfurizing tower is normal, and meanwhile, the standby pump is automatically cleaned normally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110134413.9A CN112943636B (en) | 2021-01-29 | 2021-01-29 | Rapid starting method for circulating pump of wet desulphurization system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110134413.9A CN112943636B (en) | 2021-01-29 | 2021-01-29 | Rapid starting method for circulating pump of wet desulphurization system |
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| Publication Number | Publication Date |
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| CN112943636A CN112943636A (en) | 2021-06-11 |
| CN112943636B true CN112943636B (en) | 2023-04-07 |
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| CN202110134413.9A Active CN112943636B (en) | 2021-01-29 | 2021-01-29 | Rapid starting method for circulating pump of wet desulphurization system |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321885A (en) * | 2013-06-21 | 2013-09-25 | 上海宝钢节能技术有限公司 | Energy-saving control system and energy-saving control method for slurry circulating pumps in wet desulfurization process |
| CN206972570U (en) * | 2017-06-29 | 2018-02-06 | 中国大唐集团科学技术研究院有限公司华东分公司 | A kind of water circulating pump sequence starts control device |
| CN111672310B (en) * | 2020-06-09 | 2022-04-01 | 威立雅（哈尔滨）热电有限公司 | Standby chain starting method for slurry circulating pump of flue gas desulfurization system |
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