CN104676572A - Condensate heat recovery method using double flashing and pressurizing - Google Patents
Condensate heat recovery method using double flashing and pressurizing Download PDFInfo
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- CN104676572A CN104676572A CN201510043318.2A CN201510043318A CN104676572A CN 104676572 A CN104676572 A CN 104676572A CN 201510043318 A CN201510043318 A CN 201510043318A CN 104676572 A CN104676572 A CN 104676572A
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Abstract
The invention relates to a condensate heat recovery method using double flashing and pressurizing and aims to solve the problem that in the traditional techniques, condensate heat is greatly wasted. By introducing a two-stage flashing technique and a vapor compression technique, heat in condensate can be recycled in the form of low-pressure vapor; the method is suitable for recovering the heat of vapor condensate at the temperature lower than 190 DEG C and under the pressure lower than 1.0 MPaG. The method includes the steps of primary flashing of condensate, secondary flashing and pressurizing, and returning and reusing of condensate occurring after flash steam heats medium. The method has the advantages that energy recovery rate is high and vapor value is high.
Description
Technical field
The condensate water heat that the present invention relates to a kind of twice flash distillation and pressure-raising produces recovery method.Be applicable to the heat of the condensate water of recovered temperature below 190 DEG C.Use occasion is generally and all kinds ofly may produces in the process industrial device of steam condensate, belongs to field of energy-saving technology.
Background technology
In process industrial, extensively adopt steam heating material, in heating process, after water vapour discharges its latent heat, produce condensate water.The temperature of condensate water, generally close to the saturation temperature of steam used, is generally greater than 100 DEG C, and heat energy is worth about the 5-15% accounting for steam thermal energy and be worth.
The recycling degree of condensate water heat is the key factor affecting device efficiency.In traditional handicraft, generally condensed water in high temperature is passed through heat exchanger directly as the thermal source of unclassified stores, or produce a small amount of low-pressure steam by simple flash distillation.The mode of these traditional condensate water Btu utilizations achieves the recycling of condensate water heat to a certain extent, and its advantage is that method is simple, but has quite a few heat not to be utilized, and causes the waste of condensate water heat.
Summary of the invention
It is low that the object of the invention is to solve condensate water heat utilization ratio in traditional handicraft, causes the problem of energy dissipation.The condensate water heat proposing a kind of twice flash distillation and pressure-raising produces recovery method.Be applicable to temperature below 190 DEG C, pressure is in the condensate water heat recovery of 1.0 below MPaG.
The condensate water heat of twice flash distillation that the present invention proposes and pressure-raising produces recovery method, produce retracting device by condensate water heat to realize, described device comprises full flashing tank 1, secondary flash tank 2, both vapor compression equipment 3, heat exchanger 4 and knockout tower 11, full flashing tank 1 and secondary flash tank 2 are connected, full flashing tank 1 side is provided with hot high temperature to be recycled and bears water 5 imports, bottom is a condensate water outlet, top is that full flashing vapour 6 exports, a condensate water outlet bottom full flashing tank 1 is by the import of pipeline connecting secondary flash tank 2, the top of secondary flash tank 2 is provided with secondary flash vapour 8 and exports, bottom connects condensation water pot by pipeline, described secondary flash vapour 8 connects both vapor compression equipment 3 by pipeline, the outlet of both vapor compression equipment 3 is connected heat exchanger 4 with the full flashing vapour 6 of full flashing tank 1 respectively by pipeline, described heat exchanger 4 connects knockout tower 11, the import of the condensate water outlet connecting secondary flash tank 2 of described heat exchanger 4, described method comprises condensate water primary flash, two-stage flash and boosting, and condensate water recycling after flash steam heat medium, and concrete steps are as follows:
(1) condensate water primary flash
Full flashing tank 1 and secondary flash tank 2 are connected, and its operating pressure is set as P1 and P2 respectively, and P1 span is 0.2-0.8MPaG, and concrete pressure determines according to the purposes of steam; P2 value 0.1-0.4MPaG lower than P1, concrete value is determined according to the pressure-raising ability of steam pressure-raising equipment; First the condensed water in high temperature 5 of heat to be recycled enters full flashing tank 1, and produce full flashing vapour 6 and a condensate water 7, full flashing vapour 6 directly enters heat exchanger 4 for heating material; The pressure of full flashing vapour 6 is P1;
(2) two-stage flash and boosting
The condensate water 7 produced bottom full flashing tank 1 enters secondary flash tank 2 and carries out secondary flash; Secondary flash tank 2 top produces secondary flash vapour 8, and the secondary condensate water 9 that bottom produces is flow automatically or by pumping out, enters condensation water pot; The pressure of secondary flash vapour 8 is P2; Described secondary flash vapour 8 enters both vapor compression equipment 3, and described both vapor compression equipment 3 pressure-raising ability is set as from pressure P 2 pressure-raising to pressure P 1, and flow calculates according to the quantity of steam that need process to be determined.Secondary flash vapour 8 is after through both vapor compression equipment 3, to boost to pressure be P1, and the full flashing vapour 6 produced with full flashing tank 1 merges, and enters the thermal source of heat exchanger 4 as knockout tower or steam user 11;
(3) after flash steam heated material, condensate water returns recycling
Boost to after steam that pressure is P1 and the full flashing vapour 6 that full flashing tank 1 produces merges heated material by both vapor compression equipment 3, the condensate water 10 of generation sends back to the import of secondary flash tank 2, recycles its heat; Its pressure is between operating pressure P2 and operating pressure P1.
Beneficial effect of the present invention is: present invention process flow process is simple, and be widely used, energy recovery rate is high, and the steam of generation is worth high.
Accompanying drawing explanation
Fig. 1 is technical scheme flow chart of the present invention.
Number in the figure: 1 is full flashing tank, 2 is secondary flash tank, 3 is both vapor compression equipment, and 4 is heat exchanger, and 5 is the condensed water in high temperature of heat to be recycled, 6 is full flashing vapour (pressure is P1), 7 is a condensate water (pressure is P1), and 8 is secondary flash vapour (pressure is P2), and 9 is secondary condensate water (pressure is P2), 10 is condensate water after flash steam heated material, and 11 is knockout tower or steam user.
Detailed description of the invention
By reference to the accompanying drawings technical scheme of the present invention is described in further detail below by embodiment.
Embodiment 1: certain refinery catalytic cracking unit's condensed water heat recovery system transformation.
As shown in Figure 1, the condensed water in high temperature 5 that former flow process is pressure is 0.6MPaG, flow is 40t/h directly enters condensation water pot.After transformation, condensed water in high temperature 5 is introduced into full flashing tank 1, flash off the full flashing vapour 6 that pressure is 0.3MPaG, a condensate water 7 enters secondary flash tank 2 and carries out secondary flash, flash off the secondary flash vapour 8 that pressure is 0.1MPaG, secondary flash vapour 8 enters both vapor compression equipment 3, and after compression, pressure is 0.3MPaG, heat exchanger 4 is jointly entered, for knockout tower 11 provides thermal source with the full flashing vapour 6 of same pressure.Condensate water 10 after heating and a condensate water 7 are jointly as the charging of secondary flash tank 2.
After transformation, recyclable 0.3MPaG steam 3t/h, deduction both vapor compression equipment increases power consumption 150kW, steam price according to 200 yuan/ton, electricity price according to 0.7 yuan/degree, year energy-saving benefit 2,650,000 yuan/year.
Claims (1)
1. the condensate water heat of twice flash distillation and pressure-raising produces recovery method, it is characterized in that producing retracting device by condensate water heat realizes, described device comprises full flashing tank (1), secondary flash tank (2), both vapor compression equipment (3), heat exchanger (4) and knockout tower (11), full flashing tank (1) and secondary flash tank (2) series connection, full flashing tank (1) side is provided with hot high temperature to be recycled and bears water (5) import, bottom is a condensate water outlet, top is full flashing vapour (6) outlet, a condensate water of full flashing tank (1) bottom exports the import by pipeline connecting secondary flash tank (2), the top of secondary flash tank (2) is provided with secondary flash vapour (8) outlet, bottom connects condensation water pot by pipeline, described secondary flash vapour (8) connects both vapor compression equipment (3) by pipeline, the outlet of both vapor compression equipment (3) is connected heat exchanger (4) with the full flashing vapour (6) of full flashing tank (1) respectively by pipeline, described heat exchanger (4) connects knockout tower (11), the import of condensate water outlet connecting secondary flash tank (2) of described heat exchanger (4), described method comprises condensate water primary flash, two-stage flash and boosting, and condensate water recycling after flash steam heat medium, and concrete steps are as follows:
(1) condensate water primary flash
Full flashing tank (1) and secondary flash tank (2) series connection, its operating pressure is set as P1 and P2 respectively, and P1 span is 0.2-0.8MPaG, and concrete pressure determines according to the purposes of steam; P2 value 0.1-0.4MPaG lower than P1, concrete value is determined according to the pressure-raising ability of steam pressure-raising equipment; First the condensed water in high temperature (5) of heat to be recycled enters full flashing tank (1), produce full flashing vapour (6) and a condensate water (7), full flashing vapour (6) directly enters heat exchanger (4) for heating material; The pressure of full flashing vapour (6) is P1;
(2) two-stage flash and boosting
The condensate water (7) that full flashing tank (1) bottom produces enters secondary flash tank (2) and carries out secondary flash; Secondary flash tank (2) top produces secondary flash vapour (8), and the secondary condensate water (9) that bottom produces is flow automatically or by pumping out, entered condensation water pot; The pressure of secondary flash vapour (8) is P (2); Described secondary flash vapour (8) enters both vapor compression equipment (3), described both vapor compression equipment (3) pressure-raising ability is set as from pressure P (2) pressure-raising to pressure P 1, and flow calculates according to the quantity of steam that need process to be determined; Secondary flash vapour (8) is after through both vapor compression equipment (3), to boost to pressure be P1, the full flashing vapour (6) produced with full flashing tank (1) merges, and enters the thermal source of heat exchanger (4) as knockout tower or steam user (11);
(3) after flash steam heated material, condensate water returns recycling
Boost to after steam that pressure is P1 and the full flashing vapour (6) that full flashing tank (1) produces merges heated material by both vapor compression equipment (3), the condensate water (10) produced sends back to the import of secondary flash tank (2), recycles its heat; Its pressure is between operating pressure P2 and operating pressure P1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510043318.2A CN104676572A (en) | 2015-01-29 | 2015-01-29 | Condensate heat recovery method using double flashing and pressurizing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510043318.2A CN104676572A (en) | 2015-01-29 | 2015-01-29 | Condensate heat recovery method using double flashing and pressurizing |
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| CN104676572A true CN104676572A (en) | 2015-06-03 |
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| CN201510043318.2A Pending CN104676572A (en) | 2015-01-29 | 2015-01-29 | Condensate heat recovery method using double flashing and pressurizing |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958807A (en) * | 2017-04-14 | 2017-07-18 | 山西兰花科技创业股份有限公司 | A kind of step energy saving technique of urea plant steam |
| CN109539220A (en) * | 2018-11-06 | 2019-03-29 | 华能（天津）煤气化发电有限公司 | A kind of device based on IGCC system steam condensate recovery process |
| CN109612293A (en) * | 2018-11-07 | 2019-04-12 | 襄阳泽东化工集团有限公司 | A kind of heat recovery system of condensed water in high temperature |
| CN110307535A (en) * | 2019-07-30 | 2019-10-08 | 山东凯瑞英材料科技有限公司 | A kind of system and method for superheated water low-pressure steam |
| CN113526596A (en) * | 2020-04-14 | 2021-10-22 | 中科合成油工程有限公司 | Method for recycling sewage of pressurized fixed bed coal gasification process |
| CN114857564A (en) * | 2022-04-12 | 2022-08-05 | 常州乐研分离技术有限公司 | High-temperature hot water energy recovery system and control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201844197U (en) * | 2010-05-11 | 2011-05-25 | 北京拓峰科技开发有限责任公司 | Condensation water recycling and residual heat using device |
| CN202303310U (en) * | 2011-04-18 | 2012-07-04 | 杭州术通高端仪器有限公司 | Vapor and condensed water residual heat reuse system with temperature and pressure regulation function |
| CN202452808U (en) * | 2011-12-28 | 2012-09-26 | 亿恒节能科技江苏有限公司 | Dehumidified and preheated natural air drying oven device utilizing condensed water waste heat second-effect flashing |
| CN103123107A (en) * | 2013-03-06 | 2013-05-29 | 宁波金海德旗化工有限公司 | Device for recovering waste heat and supplying steam through multistage dilatation flashing |
| CN203021781U (en) * | 2012-12-13 | 2013-06-26 | 绍兴市嘉宝节能新技术有限公司 | Step-type waste heat comprehensive utilization system of steam fabric setting machine in printing and dyeing mill |
-
2015
- 2015-01-29 CN CN201510043318.2A patent/CN104676572A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201844197U (en) * | 2010-05-11 | 2011-05-25 | 北京拓峰科技开发有限责任公司 | Condensation water recycling and residual heat using device |
| CN202303310U (en) * | 2011-04-18 | 2012-07-04 | 杭州术通高端仪器有限公司 | Vapor and condensed water residual heat reuse system with temperature and pressure regulation function |
| CN202452808U (en) * | 2011-12-28 | 2012-09-26 | 亿恒节能科技江苏有限公司 | Dehumidified and preheated natural air drying oven device utilizing condensed water waste heat second-effect flashing |
| CN203021781U (en) * | 2012-12-13 | 2013-06-26 | 绍兴市嘉宝节能新技术有限公司 | Step-type waste heat comprehensive utilization system of steam fabric setting machine in printing and dyeing mill |
| CN103123107A (en) * | 2013-03-06 | 2013-05-29 | 宁波金海德旗化工有限公司 | Device for recovering waste heat and supplying steam through multistage dilatation flashing |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958807A (en) * | 2017-04-14 | 2017-07-18 | 山西兰花科技创业股份有限公司 | A kind of step energy saving technique of urea plant steam |
| CN109539220A (en) * | 2018-11-06 | 2019-03-29 | 华能（天津）煤气化发电有限公司 | A kind of device based on IGCC system steam condensate recovery process |
| CN109612293A (en) * | 2018-11-07 | 2019-04-12 | 襄阳泽东化工集团有限公司 | A kind of heat recovery system of condensed water in high temperature |
| CN110307535A (en) * | 2019-07-30 | 2019-10-08 | 山东凯瑞英材料科技有限公司 | A kind of system and method for superheated water low-pressure steam |
| CN113526596A (en) * | 2020-04-14 | 2021-10-22 | 中科合成油工程有限公司 | Method for recycling sewage of pressurized fixed bed coal gasification process |
| CN113526596B (en) * | 2020-04-14 | 2023-04-07 | 中科合成油工程有限公司 | Method for recycling sewage of pressurized fixed bed coal gasification process |
| CN114857564A (en) * | 2022-04-12 | 2022-08-05 | 常州乐研分离技术有限公司 | High-temperature hot water energy recovery system and control method thereof |
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