CN113958943A - Method for replacing desalted water of waste heat boiler of sulfuric acid device with steam condensate - Google Patents
Method for replacing desalted water of waste heat boiler of sulfuric acid device with steam condensate Download PDFInfo
- Publication number
- CN113958943A CN113958943A CN202111267815.2A CN202111267815A CN113958943A CN 113958943 A CN113958943 A CN 113958943A CN 202111267815 A CN202111267815 A CN 202111267815A CN 113958943 A CN113958943 A CN 113958943A
- Authority
- CN
- China
- Prior art keywords
- condensate
- sulfuric acid
- water
- waste heat
- heat boiler
- 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
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 239000002918 waste heat Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000012806 monitoring device Methods 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract description 4
- 239000005696 Diammonium phosphate Substances 0.000 abstract description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract description 2
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 abstract description 2
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 abstract description 2
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 abstract description 2
- 229910000388 diammonium phosphate Inorganic materials 0.000 abstract description 2
- 235000019838 diammonium phosphate Nutrition 0.000 abstract description 2
- 235000019837 monoammonium phosphate Nutrition 0.000 abstract description 2
- 239000006012 monoammonium phosphate Substances 0.000 abstract description 2
- 239000002686 phosphate fertilizer Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a method for replacing desalted water of a waste heat boiler of a sulfuric acid device with steam condensate, which comprises the following four treatment steps: (1) collecting and summarizing steam condensate; (2) conveying the condensate to an online water quality monitoring device; (3) the condensate with qualified water quality enters a deaerator of a waste heat boiler of a sulfuric acid device to replace desalted water and produce medium-pressure steam. (4) And (4) discharging the condensate with unqualified water quality to a water treatment device. The method is suitable for phosphate fertilizer plants matched with a sulfuric acid device, a wet-process phosphoric acid device, a monoammonium phosphate device and a diammonium phosphate device.
Description
Technical Field
The invention relates to a chemical device, also relates to the field of energy conservation and emission reduction, and particularly relates to a method for replacing desalted water of a waste heat boiler of a sulfuric acid device with steam condensate.
Background
The concentration system of the phosphoric acid device, the monoammonium phosphate device and the diammonium phosphate device in the phosphate fertilizer plant uses an evaporator to concentrate materials, and the temperature of the generated condensate is 100-110 ℃. The prior method for using the condensate comprises the following steps: because the resin of the desalted water bed is limited in temperature resistance and requires the temperature of inlet water to be below 50 ℃, the condensate is cooled to below 50 ℃ by circulating water, then the condensate is sent to a desalted water device to produce desalted water, and the produced desalted water is sent to a waste heat boiler of a sulfuric acid device. The method not only wastes the heat of the condensate, but also increases the energy consumption of the cooling circulating water, increases the production burden of the desalted water device and is very uneconomical, and the heat utilization rate of the condensate is only 50%. Therefore, the inventor develops a method for directly replacing desalted water of a waste heat boiler of a sulfuric acid device with condensate.
Disclosure of Invention
The invention aims to optimize the defects in the prior art, and provides a method for replacing desalted water of a waste heat boiler of a sulfuric acid device with steam condensate of an evaporator, so that the heat utilization rate of the condensate is improved, the energy consumption of cooling circulating water is reduced, the production burden of the desalted water device is reduced, various consumptions of desalted water production are reduced, the sewage discharge is reduced, and the purposes of energy conservation and emission reduction are achieved.
The technical scheme of the invention is as follows: a method for replacing desalted water of a waste heat boiler of a sulfuric acid device by steam condensate of an evaporator is characterized by comprising four processing steps: (1) collecting and summarizing evaporator steam condensate; (2) the condensate is conveyed to an on-line water quality monitoring device to carry out on-line monitoring on the pH and the conductivity of the condensate, and control valves are arranged on a pipeline for conveying the condensate to a sulfuric acid device and a pipeline for conveying a water treatment device. Setting an interlocking: when the pH value and the conductivity of the condensate are qualified, the control valve of the sulfuric acid feeding device is fully opened, the control valve of the pipeline of the water feeding treatment device is fully closed, and the condensate is fed to a deaerator of a boiler system of the sulfuric acid feeding device; when any one of the pH value and the conductivity of the condensate is unqualified, the condensate is sent to a sulfuric acid device control valve to be totally closed, a pipeline control valve of a water treatment device is sent to be totally opened, and the condensate is sent to the water treatment device. (3) The condensate with qualified water quality enters a deaerator of a waste heat boiler of a sulfuric acid device to replace desalted water and produce medium-pressure steam. (4) And (4) discharging the condensate with unqualified water quality to a water treatment device.
A method for replacing desalted water of a waste heat boiler of a sulfuric acid device by steam condensate of an evaporator is characterized in that the index requirement of the desalted water of the waste heat boiler of the sulfuric acid device is as follows: 8.5-9.2, conductivity index: less than or equal to 20 mu S/cm.
The method of the invention provides a thought for replacing desalted water of a waste heat boiler of a sulfuric acid device with the steam condensate of the evaporator, improves the heat utilization rate of the condensate, reduces the energy consumption of cooling circulating water, reduces the production burden of the desalted water device, reduces various consumptions of desalted water production, reduces sewage discharge, achieves the purposes of energy conservation and emission reduction, has superior economy and low implementation cost, and improves the heat utilization rate of the condensate from 50% to 99% after implementation.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
A method for replacing desalted water of a waste heat boiler of a sulfuric acid device by steam condensate of an evaporator is characterized by comprising four processing steps:
(1) collecting and summarizing evaporator steam condensate;
(2) the condensate is conveyed to an online water quality monitoring device to perform online monitoring on the pH and the conductivity of the condensate, and the pH index is as follows: 8.5-9.2, conductivity index: less than or equal to 20 mu S/cm. Control valves are arranged on the pipeline for delivering the sulfuric acid device and the pipeline for delivering the water treatment device. Setting an interlocking: when the pH value and the conductivity of the condensate are qualified, the control valve of the sulfuric acid feeding device is fully opened, the control valve of the pipeline of the water feeding treatment device is fully closed, and the condensate is fed to a deaerator of a boiler system of the sulfuric acid feeding device; when any one of the pH value and the conductivity of the condensate is unqualified, the condensate is sent to a sulfuric acid device control valve to be totally closed, a pipeline control valve of a water treatment device is sent to be totally opened, and the condensate is sent to the water treatment device.
(3) The condensate with qualified water quality enters a deaerator of a waste heat boiler of a sulfuric acid device to replace desalted water and produce medium-pressure steam. Because the condensate directly enters a deaerator of a sulfuric acid device without being cooled in each link of collection and conveying, the heat loss in the conveying process is calculated by 1 percent, and the utilization rate of the heat of the condensate reaches 99 percent.
(4) And (4) discharging the condensate with unqualified water quality to a water treatment device.
Claims (4)
1. A method for replacing desalted water of a waste heat boiler of a sulfuric acid device by steam condensate is characterized by comprising four processing steps: (1) collecting and summarizing steam condensate;
(2) conveying the condensate to an online water quality monitoring device, carrying out online monitoring on the pH and the conductivity of the condensate, and arranging control valves on a pipeline for conveying the condensate to a sulfuric acid device and a pipeline for conveying a water treatment device; setting an interlocking: when the water quality index pH and the conductivity of the condensate are qualified, the control valve of the sulfuric acid feeding device is fully opened, the control valve of the pipeline of the water feeding treatment device is fully closed, and the condensate is fed to a deaerator of a waste heat boiler of the sulfuric acid feeding device; when any one of the pH value and the conductivity of the condensate water quality index is unqualified, the condensate water is sent to a sulfuric acid device control valve to be totally closed, a pipeline control valve of a water treatment device is sent to be totally opened, and the condensate water is sent to the water treatment device;
(3) the condensate with qualified water quality enters a deaerator of a waste heat boiler of a sulfuric acid device to replace desalted water and produce medium-pressure steam;
(4) and (4) discharging the condensate with unqualified water quality to a water treatment device.
2. The method for replacing desalted water of the waste heat boiler of the sulfuric acid device by steam condensate as claimed in claim 1, wherein the index requirement of the desalted water of the waste heat boiler of the sulfuric acid device is as follows: 8.5-9.2, conductivity index: less than or equal to 20 mu S/cm.
3. The method for replacing the desalted water of the waste heat boiler of the sulfuric acid device by the steam condensate as claimed in claim 1, wherein a water quality on-line monitoring device is designed on a condensate pipeline of the desalted water of the waste heat boiler of the sulfuric acid device, the pH value and the conductivity of the condensate are monitored in real time, and the condensate enters a deaerator of the waste heat boiler of the sulfuric acid device after the water quality is qualified.
4. The method for desalinating water by using steam condensate to replace a waste heat boiler of a sulfuric acid device according to claim 1, wherein control valves are designed on pipelines for feeding sulfuric acid devices and pipelines for feeding water treatment devices, and interlocking is designed: condensate with unqualified water quality can be measured in real time and discharged in time, so that the operation safety of a boiler system is guaranteed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111267815.2A CN113958943A (en) | 2021-10-29 | 2021-10-29 | Method for replacing desalted water of waste heat boiler of sulfuric acid device with steam condensate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111267815.2A CN113958943A (en) | 2021-10-29 | 2021-10-29 | Method for replacing desalted water of waste heat boiler of sulfuric acid device with steam condensate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113958943A true CN113958943A (en) | 2022-01-21 |
Family
ID=79468212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111267815.2A Pending CN113958943A (en) | 2021-10-29 | 2021-10-29 | Method for replacing desalted water of waste heat boiler of sulfuric acid device with steam condensate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113958943A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200330445Y1 (en) * | 2003-07-28 | 2003-10-17 | 주식회사 포스코 | Treatment Apparatus for Coke Oven Gas Condensed Water Containing a Large Percentage of Thiocyandgen Using Sulfuric Acid |
| CN202868667U (en) * | 2012-10-15 | 2013-04-10 | 中国石油化工股份有限公司湖北化肥分公司 | Steam condensate liquid recovery device |
| CN106430789A (en) * | 2016-11-16 | 2017-02-22 | 中石化宁波工程有限公司 | Technology for preparing boiler water from process condensate |
| CN209161728U (en) * | 2018-11-20 | 2019-07-26 | 湖北省黄麦岭磷化工有限责任公司 | Two effect condensate recycling devices |
-
2021
- 2021-10-29 CN CN202111267815.2A patent/CN113958943A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200330445Y1 (en) * | 2003-07-28 | 2003-10-17 | 주식회사 포스코 | Treatment Apparatus for Coke Oven Gas Condensed Water Containing a Large Percentage of Thiocyandgen Using Sulfuric Acid |
| CN202868667U (en) * | 2012-10-15 | 2013-04-10 | 中国石油化工股份有限公司湖北化肥分公司 | Steam condensate liquid recovery device |
| CN106430789A (en) * | 2016-11-16 | 2017-02-22 | 中石化宁波工程有限公司 | Technology for preparing boiler water from process condensate |
| CN209161728U (en) * | 2018-11-20 | 2019-07-26 | 湖北省黄麦岭磷化工有限责任公司 | Two effect condensate recycling devices |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101948148B (en) | Energy-saving low-temperature multiple-effect seawater desalting device | |
| EP3197839B1 (en) | Method and arrangement for wastewater treatment | |
| CN202909472U (en) | Multi-effect evaporator system | |
| CN103880101B (en) | Blast furnace slag quenching water waste heat realizes system and the technique of low-temperature multiple-effect seawater desalination production | |
| CN113958943A (en) | Method for replacing desalted water of waste heat boiler of sulfuric acid device with steam condensate | |
| CN110697660B (en) | Double-effect concentration and recycling method for waste acid in titanium dioxide production enterprises | |
| CN109316774B (en) | Low-temperature low-pressure steam regeneration recovery device and method | |
| CN203928225U (en) | A kind of for center air-condition circle water water quality Integrated Processing System | |
| CN104829032A (en) | Ammonia-nitrogen wastewater treatment system | |
| CN210367047U (en) | Multistage flash distillation desulfurization effluent treatment plant | |
| CN211169845U (en) | Pickling waste liquid treatment system and recovery plant | |
| CN204039104U (en) | A kind of circulating water device be applied in power station | |
| CN113880172A (en) | Low-temperature multi-effect evaporation seawater desalination energy utilization system and method | |
| CN207671862U (en) | One kind being used for coal chemical industry enterprises high-concentration ammonia nitrogenous wastewater recycling treatment system | |
| CN207903935U (en) | A kind of cooling evaporating of higher liquid | |
| CN207918475U (en) | The device that garbage percolation concentrate is handled in conjunction with MVR | |
| CN101811684B (en) | Method for co-production of granular monoammonium phosphate by using powdery monoammonium phosphate production device | |
| CN211896120U (en) | System for evaporating and concentrating desulfurization wastewater by using waste gas waste heat | |
| CN220870848U (en) | Automatic recovery system of steam condensate | |
| CN110713265A (en) | Automatic dosing water-saving treatment system and method for absorption heat pump waste heat water | |
| CN219433229U (en) | Device for recovering polluted steam condensate and waste heat thereof | |
| CN106140044A (en) | A kind of liquid ammonia evaporating device for cyclohexanone oxamidinating reaction | |
| CN104819447A (en) | Clean steam generation device | |
| CN113880287B (en) | Ammonia nitrogen recovery device and method for resin regeneration wastewater of fine treatment system of power plant | |
| CN217875815U (en) | Device for supplementing water for low-temperature heat recovery device by replacing sulfuric acid with steam condensate |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220121 |
|
| WD01 | Invention patent application deemed withdrawn after publication |