CN212383451U - Control system for temperature of ammonia water in ammonia water absorption tower - Google Patents
Control system for temperature of ammonia water in ammonia water absorption tower Download PDFInfo
- Publication number
- CN212383451U CN212383451U CN202021719633.5U CN202021719633U CN212383451U CN 212383451 U CN212383451 U CN 212383451U CN 202021719633 U CN202021719633 U CN 202021719633U CN 212383451 U CN212383451 U CN 212383451U
- Authority
- CN
- China
- Prior art keywords
- ammonia water
- control unit
- temperature
- pipeline
- ammonia
- 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.)
- Active
Links
Images
Landscapes
- Gas Separation By Absorption (AREA)
Abstract
The utility model relates to a control system of aqueous ammonia temperature in aqueous ammonia absorption tower, including aqueous ammonia absorption tower and pipeline, each valve, detector table and control system, its characterized in that, control system include programmable logic controller, circulation absorption stage aqueous ammonia temperature control unit, non-circulation absorption stage aqueous ammonia temperature control unit and aqueous ammonia temperature exception handling the control unit, logic controller links to each other with each valve, detector table and three the control unit electrical property. The utility model has the advantages that: the control flow of the bypass opening and closing valve in the circulating absorption stage is determined according to the analysis and the judgment of the temperature through the control system, the control flow of each valve in the non-circulating absorption stage is determined according to the analysis and the judgment of the temperature, and the alarm of abnormal conditions is sent according to the analysis and the judgment of the temperature, so that the intelligent control of the temperature of the ammonia water in the ammonia water absorption tower is realized through the real-time detection and the comprehensive control of the temperature.
Description
Technical Field
The utility model relates to an industrial computer real-time control technical field, concretely relates to control system of aqueous ammonia temperature in aqueous ammonia absorption tower.
Background
The flue gas pollution discharged by the traditional sintering production is serious, and the main pollutants are sulfur dioxide and nitric oxide. With the gradual strictness of the national emission standards of flue gas, a series of flue gas desulfurization and denitration projects begin to be built. One effective flue gas denitration method is to use ammonia gas as a reducing agent to reduce nitrogen oxides into nitrogen gas and water. The ammonia station system is responsible for producing ammonia, and the waste water discharged in the production process contains high-concentration ammonia nitrogen compounds, and needs to be subjected to secondary treatment processes of ammonia extraction and ammonia water absorption. The main reaction container for absorbing the ammonia water is an ammonia water absorption tower, circulating ammonia water flowing from top to bottom in the tower is contacted with ammonia gas introduced from bottom to top and dissolved, the concentration of the ammonia water is continuously increased in the circulating process, and finally the ammonia water meeting the concentration requirement is recovered. The ammonia releases heat in the process of dissolving in water, and long-time production process can make the interior aqueous ammonia temperature of tower increase gradually, and the aqueous ammonia solubility in water reduces along with the rising of temperature, therefore the high temperature will reduce the work efficiency of aqueous ammonia absorption tower.
In the production of the traditional ammonia water absorption tower, in order to reduce the temperature of the ammonia water in the tower, a condenser is usually additionally arranged in an ammonia water circulation loop, so that an ideal effect can be achieved. The on-site ammonia water absorption tower temperature control system comprises an ammonia water absorption tower, a condenser, a circulating water pump, a bypass opening and closing valve, a water inlet opening and closing valve, a circulating opening and closing valve, a recovery opening and closing valve and an ammonia water thermometer. The ammonia water absorption tower is of a tower kettle structure, the middle upper part in the tower is an ammonia gas and circulating ammonia water contact dissolving area, and the kettle at the lower part of the tower is an ammonia water storage area. The condenser is positioned on the circulating pipeline and used for cooling the circulating ammonia water passing through the condenser; the circulating water pumps are connected to the outlet of a circulating pipeline at the bottom of the ammonia water absorption tower and used for pumping the ammonia water at the bottom of the tower to the top of the tower, and one circulating water pump works and the other circulating water pump works for standby; the bypass opening and closing valve is positioned on the circulating pipeline and used for circulating the circulating ammonia water by bypassing the condenser; the water inlet opening and closing valve is positioned on a water inlet pipeline at the top of the ammonia water absorption tower and is used for controlling the on-off of new water entering the tower; the circulating on-off valve is positioned at the inlet of the circulating pipeline at the top of the ammonia water absorption tower and is used for controlling the on-off of the circulating ammonia water; the recycling opening and closing valve is positioned on a recycling pipeline of a circulating pipeline branch at the top of the ammonia water absorption tower and is used for controlling the on-off of recycled ammonia water; and the ammonia water thermometer is positioned at the bottom of the ammonia water absorption tower and is used for measuring the temperature of the ammonia water in the kettle. But the aqueous ammonia absorption tower is not always in the process of circulating absorption, and also has the process of supplementing fresh water, the process of recovering aqueous ammonia and the non-production process, even in the circulating absorption process, the aqueous ammonia does not need to be cooled all the time, and the condenser in the aqueous ammonia circulation loop is in the working condition all the time. Therefore, the method of adding the condenser to reduce the temperature of the ammonia water in the tower in the traditional production not only wastes the power resource but also increases the hidden danger that the condensed water is polluted.
Disclosure of Invention
To the above-mentioned problem that exists among the prior art, the utility model aims at providing a control system of aqueous ammonia temperature in aqueous ammonia absorption tower, the utility model discloses a to the real-time detection of aqueous ammonia temperature in the aqueous ammonia absorption tower and to the integrated control of each pipeline valve, realized the intelligent control to aqueous ammonia temperature.
The utility model aims at realizing through the following technical scheme:
the utility model discloses a control system of aqueous ammonia temperature in aqueous ammonia absorption tower, including aqueous ammonia absorption tower, ammonia air inlet line, water inlet pipe, valve and aqueous ammonia recovery pipeline, recovery valve, aqueous ammonia collection tank and control system of intaking, its characterized in that, the ammonia air inlet line set up in the middle part of aqueous ammonia absorption tower, the water inlet line sets up at the top of aqueous ammonia absorption tower, is equipped with the circulation pipeline in the side of aqueous ammonia absorption tower, circulation pipeline one end and aqueous ammonia absorption tower bottom intercommunication, the other end and the upper portion of aqueous ammonia absorption tower intercommunication, the circulation pipeline divide into hypomere, middle section and upper segment triplex, be equipped with circulating water pump between circulation pipeline hypomere and middle section, be equipped with the condenser in the middle part of circulation pipeline middle section the condenser side by be equipped with the bypass pipeline, bypass pipeline one end and the lower part in circulation pipeline middle section communicate, the other end of the ammonia water recovery pipeline is communicated with the upper part of the middle section of the circulating pipeline, a bypass opening and closing valve is arranged on the bypass pipeline, a circulating opening and closing valve is arranged on the upper section of the circulating pipeline, an ammonia water thermometer is arranged on the lower part of the ammonia water absorption tower, one end of the ammonia water recovery pipeline is communicated with the middle section and the upper section of the circulating pipeline through a tee joint, and the other end of the ammonia water recovery pipeline is communicated with an ammonia water collection;
the control system is an intelligent control system and comprises a programmable logic controller, an ammonia water temperature control unit in a cyclic absorption stage, an ammonia water temperature control unit in a non-cyclic absorption stage and an ammonia water temperature abnormity processing control unit; the input end of the programmable logic controller is connected with the ammonia water level meter and the ammonia water densimeter, the output end of the programmable logic controller is electrically connected with the water inlet on-off valve, the circulating water pump, the condenser, the circulating on-off valve, the bypass on-off valve and the recovery on-off valve, the output end of the programmable logic controller is also connected with the input end of an ammonia water temperature control unit at the cyclic absorption stage, the output end of the ammonia water temperature control unit at the cyclic absorption stage is connected with the input end of an ammonia water temperature control unit at the non-cyclic absorption stage, the output end of the ammonia water temperature control unit at the non-cyclic absorption stage is connected with the input end of an ammonia water temperature abnormity processing control unit, and the output end of the ammonia water temperature control unit at the cyclic absorption stage, the output end of the ammonia water temperature control unit at the non-cyclic absorption stage and the output end of the ammonia water temperature abnormity processing control unit at the cyclic absorption.
Furthermore, the ammonia water temperature control unit at the circulating absorption stage is used for controlling the on-off of a bypass on-off valve so as to control the temperature of the ammonia water in the ammonia water absorption tower at the circulating absorption stage;
the ammonia water temperature control unit in the non-cyclic absorption stage is used for comprehensively controlling the on-off of each pipeline valve so as to control the temperature of the ammonia water in the ammonia water absorption tower in the non-cyclic absorption stage;
and the ammonia water temperature abnormity processing control unit is used for monitoring the abnormity condition of the temperature of the ammonia water in the ammonia water absorption tower in real time and giving an abnormity alarm.
Compared with the prior art, the utility model has the advantages that:
because the utility model adopts the control system of the temperature of the ammonia water in the ammonia water absorption tower, the temperature of the ammonia water in the ammonia water absorption tower can be detected in real time and the valves of each pipeline can be controlled comprehensively, and the valves of the pipeline are controlled by the system to control the temperature in the tower within a reasonable interval in the circulating absorption stage according to different working stages in the tower; in the non-cyclic absorption stage, the system controls the pipeline valve to control the temperature in the tower according to actual requirements.
Drawings
FIG. 1 is a schematic view of a control system for controlling the temperature of ammonia water according to the present invention;
fig. 2 is a block diagram of the computer software system of the present invention.
Detailed Description
For a clear, detailed and complete description of the present invention, reference is made to the accompanying drawings and detailed description of the invention.
As shown in fig. 1 and fig. 2, the system for controlling the temperature of ammonia water in an ammonia water absorption tower of the present invention comprises an ammonia water absorption tower 1, an ammonia gas inlet pipeline 2, a water inlet pipeline 3, a water inlet open/close valve 4, an ammonia water recovery pipeline 9, a recovery open/close valve 10, an ammonia water collection tank 13 and a control system, and is characterized in that the ammonia gas inlet pipeline 2 is disposed in the middle of the ammonia water absorption tower 1, the water inlet pipeline 3 is disposed at the top of the ammonia water absorption tower 1, a circulation pipeline 5 is disposed on the side of the ammonia water absorption tower 1, one end of the circulation pipeline 5 is communicated with the bottom of the ammonia water absorption tower 1, the other end is communicated with the upper part of the ammonia water absorption tower 1, the circulation pipeline 5 is divided into a lower section, a middle section and an upper section, a circulation water pump 6 is disposed between the lower section and the upper section of the circulation pipeline 5, a condenser 7 is disposed in the middle, one end of the bypass pipeline 11 is communicated with the lower part of the middle section of the circulating pipeline 5, the other end of the bypass pipeline is communicated with the upper part of the middle section of the circulating pipeline 5, a bypass opening and closing valve 12 is arranged on the bypass pipeline 11, a circulating opening and closing valve 8 is arranged on the upper section of the circulating pipeline 5, an ammonia water thermometer 14 is arranged on the lower part of the ammonia water absorption tower 1, one end of the ammonia water recovery pipeline 9 is communicated with the upper section and the middle section of the circulating pipeline 5 through a tee joint, and the other end of the ammonia water recovery pipeline is communicated with an;
the control system is an intelligent control system and comprises a programmable logic controller, an ammonia water temperature control unit in a cyclic absorption stage, an ammonia water temperature control unit in a non-cyclic absorption stage and an ammonia water temperature abnormity processing control unit; the input end of the programmable logic controller is connected with an ammonia water thermometer 14, the output end of the programmable logic controller is electrically connected with a water inlet on-off valve 4, a circulating water pump 6, a condenser 7, a circulating on-off valve 8, a bypass on-off valve 12 and a recovery on-off valve 10, the output end of the programmable logic controller is also connected with the input end of an ammonia water temperature control unit at the cyclic absorption stage, the output end of the ammonia water temperature control unit at the cyclic absorption stage is connected with the input end of an ammonia water temperature control unit at the non-cyclic absorption stage, the output end of the ammonia water temperature control unit at the non-cyclic absorption stage is connected with the input end of an ammonia water temperature abnormity processing control unit, and the output end of the ammonia water temperature control unit at the cyclic absorption stage, the output end of the ammonia water temperature control unit at the non-cyclic absorption stage and the output end of the ammonia water temperature abnormity processing control unit at the cyclic absorption.
By adopting the control system of the ammonia water temperature in the ammonia water absorption tower, the ammonia water temperature control unit in the circulating absorption stage is used for controlling the on-off of the bypass on-off valve 12 so as to control the ammonia water temperature in the ammonia water absorption tower in the circulating absorption stage;
in the circulation absorption stage, the intake opening/closing valve 4 is in a closed state, the circulation opening/closing valve 8 is in an open state, and the recovery opening/closing valve 10 is in a closed state; when the bypass opening/closing valve 12 is closed, the ammonia water circulates through the condenser 7, and the ammonia water in the column is in a temperature-reduced state; when the bypass opening/closing valve 12 is opened, the ammonia water circulates while bypassing the condenser 7, and the temperature of the ammonia water in the column is raised; the ammonia water temperature control unit in the circulating absorption stage mainly controls the temperature of the ammonia water in the ammonia water absorption tower 1 by controlling the on-off of the bypass opening and closing valve 12.
The ammonia water temperature control unit in the non-cyclic absorption stage is used for comprehensively controlling the on-off of each pipeline valve so as to control the temperature of the ammonia water in the ammonia water absorption tower in the non-cyclic absorption stage;
the non-circulating absorption stage comprises a total of three periods, namely an ammonia water recovery period, a fresh water replenishing period and a non-production period; and the ammonia water temperature control unit in the non-cyclic absorption stage determines the control flow of each pipeline valve in the non-cyclic absorption stage according to the analysis and judgment on the temperature of the ammonia water:
1) during ammonia recovery
When the ammonia water concentration in the tower reaches the standard, the ammonia water is required to be recovered, at the moment, the circulating open-close valve 8 is closed, the water inlet open-close valve 4 is closed, the recovery open-close valve 10 is opened, and the ammonia water is discharged from the ammonia water absorption tower 1 to the ammonia water collecting tank 13; simultaneously opening the bypass opening-closing valve 12 and closing the condenser 7; only when the temperature of the ammonia water in the tower exceeds a certain alarm value, the circulation on-off valve 8 is opened, the condenser 7 is restarted, and the bypass on-off valve 12 is closed;
2) during the period of replenishing water
When the ammonia water in the tower is insufficient, the circulation on-off valve 8 is opened, the water inlet on-off valve 4 is opened, the recovery on-off valve 10 is closed, the bypass on-off valve 12 is opened, and the condenser 7 is closed;
3) during nonproductive period
The ammonia water absorption tower 1 is not fed with ammonia gas, and the bypass opening and closing valve 12 is opened and the condenser 7 is closed;
and the ammonia water temperature abnormity processing control unit is used for monitoring the abnormity condition of the temperature of the ammonia water in the ammonia water absorption tower in real time and giving an abnormity alarm.
The ammonia water temperature abnormity processing control unit is mainly used for adjusting and controlling the abnormity of the ammonia water temperature control process in the ammonia water absorption tower 1, the abnormity of the ammonia water temperature is mainly divided into temperature abnormity reduction or temperature abnormity rise, and the concrete conditions and the processing process are as follows:
1) abnormal drop of ammonia water temperature
The conditions that the condenser 7 is used excessively, the fresh water is supplemented excessively or the ammonia gas is introduced excessively are mainly considered; at this time, the condenser 7 is closed, the water inlet opening and closing valve 4 is closed, and whether the temperature of the ammonia water rises or not is monitored; when the temperature of the ammonia water still does not rise, an alarm is given and a maintainer is informed to check the introduction of the ammonia gas;
2) abnormal rise in temperature of ammonia water
The failure of the condenser 7 is mainly considered, an alarm is given and maintenance personnel are informed to check the condenser 7.
The specific implementation of the present invention can be changed and modified in various ways within the scope defined by the claims, and any person should fall within the protection scope of the present invention based on all other embodiments implemented by the present invention without any creative work.
Claims (2)
1. A control system for the temperature of ammonia water in an ammonia water absorption tower comprises the ammonia water absorption tower, an ammonia gas inlet pipeline, a water inlet opening and closing valve, an ammonia water recovery pipeline, a recovery opening and closing valve, an ammonia water collecting tank and a control system, and is characterized in that the ammonia gas inlet pipeline is arranged in the middle of the ammonia water absorption tower, the water inlet pipeline is arranged at the top of the ammonia water absorption tower, a circulating pipeline is arranged on the side surface of the ammonia water absorption tower, one end of the circulating pipeline is communicated with the bottom of the ammonia water absorption tower, the other end of the circulating pipeline is communicated with the upper part of the ammonia water absorption tower, the circulating pipeline is divided into a lower section, a middle section and an upper section, a circulating water pump is arranged between the lower section and the middle section of the circulating pipeline, a condenser is arranged in the middle of the middle section of the circulating pipeline, the other end of the ammonia water recovery pipeline is communicated with the upper part of the middle section of the circulating pipeline, a bypass opening and closing valve is arranged on the bypass pipeline, a circulating opening and closing valve is arranged on the upper section of the circulating pipeline, an ammonia water thermometer is arranged on the lower part of the ammonia water absorption tower, one end of the ammonia water recovery pipeline is communicated with the middle section and the upper section of the circulating pipeline through a tee joint, and the other end of the ammonia water recovery pipeline is communicated with an ammonia water collection;
the control system is an intelligent control system and comprises a programmable logic controller, an ammonia water temperature control unit in a cyclic absorption stage, an ammonia water temperature control unit in a non-cyclic absorption stage and an ammonia water temperature abnormity processing control unit; the input end of the programmable logic controller is connected with the ammonia water level meter and the ammonia water densimeter, the output end of the programmable logic controller is electrically connected with the water inlet on-off valve, the circulating water pump, the condenser, the circulating on-off valve, the bypass on-off valve and the recovery on-off valve, the output end of the programmable logic controller is also connected with the input end of an ammonia water temperature control unit at the cyclic absorption stage, the output end of the ammonia water temperature control unit at the cyclic absorption stage is connected with the input end of an ammonia water temperature control unit at the non-cyclic absorption stage, the output end of the ammonia water temperature control unit at the non-cyclic absorption stage is connected with the input end of an ammonia water temperature abnormity processing control unit, and the output end of the ammonia water temperature control unit at the cyclic absorption stage, the output end of the ammonia water temperature control unit at the non-cyclic absorption stage and the output end of the ammonia water temperature abnormity processing control unit at the cyclic absorption.
2. The system for controlling the temperature of the ammonia water in the ammonia water absorption tower according to claim 1, wherein the ammonia water temperature control unit in the cyclic absorption stage is used for controlling the on-off of a bypass on-off valve so as to control the temperature of the ammonia water in the ammonia water absorption tower in the cyclic absorption stage;
the ammonia water temperature control unit in the non-cyclic absorption stage is used for comprehensively controlling the on-off of each pipeline valve so as to control the temperature of the ammonia water in the ammonia water absorption tower in the non-cyclic absorption stage;
and the ammonia water temperature abnormity processing control unit is used for monitoring the abnormity condition of the temperature of the ammonia water in the ammonia water absorption tower in real time and giving an abnormity alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021719633.5U CN212383451U (en) | 2020-08-18 | 2020-08-18 | Control system for temperature of ammonia water in ammonia water absorption tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021719633.5U CN212383451U (en) | 2020-08-18 | 2020-08-18 | Control system for temperature of ammonia water in ammonia water absorption tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212383451U true CN212383451U (en) | 2021-01-22 |
Family
ID=74253938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021719633.5U Active CN212383451U (en) | 2020-08-18 | 2020-08-18 | Control system for temperature of ammonia water in ammonia water absorption tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212383451U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111841256A (en) * | 2020-08-18 | 2020-10-30 | 中冶北方（大连）工程技术有限公司 | System and method for controlling temperature of ammonia water in ammonia water absorption tower |
-
2020
- 2020-08-18 CN CN202021719633.5U patent/CN212383451U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111841256A (en) * | 2020-08-18 | 2020-10-30 | 中冶北方（大连）工程技术有限公司 | System and method for controlling temperature of ammonia water in ammonia water absorption tower |
| CN111841256B (en) * | 2020-08-18 | 2024-03-08 | 中冶北方（大连）工程技术有限公司 | Control system and method for ammonia water temperature in ammonia water absorption tower |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102621939A (en) | Industrial boiler water quality on-line monitoring and intelligent control apparatus and method thereof | |
| CN212383451U (en) | Control system for temperature of ammonia water in ammonia water absorption tower | |
| CN111841259B (en) | Control system and method for circulating absorption process of ammonia absorption tower | |
| CN212215062U (en) | Water supplementing system of ammonia water absorption tower | |
| CN212396325U (en) | Ammonia water recovery intelligent control system of ammonia water absorption tower | |
| CN212396324U (en) | Ammonia water absorption tower integrated control system | |
| CN212396322U (en) | Ammonia water absorption tower control analysis system | |
| CN212396323U (en) | Control system for cyclic absorption process of ammonia water absorption tower | |
| CN106988813A (en) | The system and method that a kind of utilization waste heat drives process equipment | |
| CN111841256B (en) | Control system and method for ammonia water temperature in ammonia water absorption tower | |
| CN114136105A (en) | Flue gas dust removal and waste heat recovery system and recovery method | |
| CN112923748A (en) | Coal-fired flue gas cooling system and method | |
| CN204637904U (en) | A kind of emission-control equipment of circulating water wash type | |
| CN202266827U (en) | Device for recycling exhausted air with micro positive pressure | |
| CN111841258B (en) | Water supplementing system and method of ammonia water absorption tower | |
| CN205505779U (en) | Liquid level holdout device at bottom of tower | |
| CN112229231A (en) | Kiln flue gas waste heat recovery system | |
| CN201357034Y (en) | Adipic acid argon, nitrate and waste gas recovery system | |
| CN108443861B (en) | Energy-saving device for eliminating back pressure of closed condensate water recovery system | |
| CN214747348U (en) | Coal-fired flue gas cooling system | |
| CN205223148U (en) | Transformer petrol purifier | |
| CN216726655U (en) | Processing apparatus of industrial kiln tail gas that contains high concentration ammonia, tar | |
| CN111841257A (en) | Comprehensive control system and method for ammonia water absorption tower | |
| CN216431273U (en) | Concentrated sulfuric acid circulating system of Nashi pump | |
| CN220287421U (en) | Steam condensate recovery system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |