CN202415426U - System for recycling polymerization waste heat - Google Patents
System for recycling polymerization waste heat Download PDFInfo
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- CN202415426U CN202415426U CN2011204764317U CN201120476431U CN202415426U CN 202415426 U CN202415426 U CN 202415426U CN 2011204764317 U CN2011204764317 U CN 2011204764317U CN 201120476431 U CN201120476431 U CN 201120476431U CN 202415426 U CN202415426 U CN 202415426U
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Abstract
The utility model relates to a production system of the chemical fiber industry and in particular relates to a system and a method for recycling polymerization waste heat, and the system and the method are mainly used for solving the technical problems that the temperature of hot water from a refrigerating set is higher, esterified steams cannot be utilized, the heat energy is wasted, in particular when the refrigerating set is not started in winter, the heat energy cannot be utilized, the power consumption of air cooling is increased, in addition, the steam generated by boilers of a polymerization plant in winter cannot be utilized and is wasted in the prior art. The method comprises the following steps of: introducing high-temperature water from a process tower into an air cooling heat exchanger; cooling the refrigerating set; introducing cooled water to an esterified water collecting tank; introducing a part of esterified water from the esterified water collecting tank into a heater so as to be heated; introducing hot water to a slurry preheater; preheating the slurry to be esterified; discharging the heated slurry from a slurry outlet; sending the heated slurry to be esterified; and sending the heated water to a boiler.
Description
Technical field
The utility model relates to a kind of production system of chemical fibre industry, especially relates to a kind of polymerization waste heat and utilizes system again.
Background technology
Esterification steam is the by product that produces in the polymerization production reaction process, and its vapor temperature is normally about 103 degree.The method that the esterification steam of present domestic poly-unit utilizes is the steam that produces in the polymerization esterification process to be delivered to the freezing unit of mono-potency lithium bromide utilize again.Chinese patent discloses a kind of polymerization esterification UTILIZATION OF VESIDUAL HEAT IN method and device (publication number: CN101250257); At least one lithium bromide refrigerator drawn and supplied with to its cat head exhaust steam with reaction kettle of the esterification top knockout tower as thermal source; And one holding tank is set at the condensation-water drain of refrigerator; With pump this portion water is delivered in the wastewater collection jar, part is as trim the top of column water, and other overflow to gas stripping column recycles; The pipeline increase of drawing exhaust steam from the cat head of knockout tower has pressure regulator valve, to improve the vapor pressure as the lithium bromide refrigerator thermal source; The cat head of knockout tower is drawn on the pipeline of exhaust steam and is parallel with one road air heat exchanger, and the temperature of exhaust steam makes it to become waste water after the cooling when reducing not as the lithium bromide refrigerator thermal source, combines in the wastewater collection jar with the lithium bromide refrigerator water of condensation; Its polymerization esterification residual heat using device comprises reaction kettle of the esterification and utility appliance, and it also includes at least one lithium bromide refrigerator, is connected on the condensing surface of lithium bromide refrigerator through steam-pipe on the cat head of reaction kettle of the esterification top knockout tower; At least also be serially connected with the pressure regulator valve that can increase vapor pressure in the steam-pipe on the steam-pipe, and on steam-pipe, also be parallel with one road steam branch pipe, this steam branch pipe is connected with at least one air heat exchanger; On the condensation-water drain of steam-pipe after connecting the condensing surface of lithium bromide refrigerator with pipe connection in a wastewater collection jar; And steam branch pipe is connected in the wastewater collection jar after connecting air heat exchanger too; This wastewater collection jar one tunnel connects the knockout tower cat head, and another road is connected in gas stripping column.But the temperature of the hot water that the freezing unit of this device comes out generally also 80 the degree about, partial esterification steam can't utilize, these heat energy only waste.When particularly winter, freezing unit was not opened, not only can't utilize but also increased the power consumption of air cooling; In addition general polymerization factory to the steam that produces of the waste heat boiler of heating agent stove in winter also can't utilize, also can only waste.
The utility model content
The utility model provides a kind of polymerization waste heat and utilizes system and method thereof again; It mainly is that to solve the temperature of the hot water that the freezing unit of existing in prior technology comes out higher; Partial esterification steam can't utilize; These heat energy only waste, and when particularly winter, freezing unit was not opened, not only can't utilize but also have increased the power consumption of air cooling; In addition general polymerization factory to the steam that produces of the waste heat boiler of heating agent stove in winter also can't utilize the technical problem that also can only waste etc.
The above-mentioned technical problem of the utility model mainly is able to solve through following technical proposals:
A kind of polymerization waste heat of the utility model utilizes system again; Comprise process tower; Described process tower is connected with air cooling heat exchanger, freezing unit respectively through the high-temperature steam pipe, and air cooling heat exchanger, freezing unit all are connected with the esterification water collecting groove, and the esterification water collecting groove connects interchanger, the first esterification tank respectively through water pipe; Interchanger is provided with refrigerated water import, chilled water outlet; Interchanger connects process tower through water pipe, and the first esterification tank is connected with stripping tower, and stripping tower connects boiler through blow-down pipe.When outside air temperature is low, can directly cool off through air cooling heat exchanger the hot water that process tower comes out, the water inlet of air cooling heat exchanger can be provided with manual modulation valve, automatic regulating valve, is used for regulating the size of flow.When outside air temperature is higher, can start freezing unit hot water is cooled off, so no matter, can tentatively cool off hot water in what in season.Interchanger can cool off the water that the esterification water collecting groove comes out through refrigerated water once more, and cooled water can be sent back to process tower.The heat exchange comparison of refrigerated water will be got well than the effect of air heat exchange.
As preferably, described esterification water collecting groove is connected with well heater through water pipe, and well heater connects the slurry preheater through water pipe; Slurry preheater inside is provided with the slurry pipe that can feed slurry; Slurry pipe is communicated with slurry inlet and slurry outlet, and the slurry inlet is communicated with the slurry transfer lime, and slurry outlet is communicated with esterification equipment; The slurry preheater connects the second esterification tank through water pipe, and the second esterification tank connects the first esterification tank, boiler respectively.The design particularly important of slurry pre-heaters.One, guarantees that certain pressure all has higher design requirements to the radical of caliber, pipe range, pipe.Two, to guarantee that residence time of each standpipe is even relatively.Three, there is the residence time of wanting enough to guarantee to have sufficient heat exchange.Four, design will be considered convenience for washing, and anti-blocking will be arranged.The installation requirement of slurry pre-heaters: stand-type or 45 degree that tilt.There is two-way switchable that ordinary production is not had during design and recognizes what influence.Also be communicated with on the slurry preheater and clean inlet, washing outlet, be convenient to slurry preheater inside is cleaned.The slurry transfer lime can directly be communicated with esterification equipment, and be connected with the slurry drain, EG cleans the gangway.The slurry inlet also is communicated with EG with the slurry outlet place and cleans the gangway.
As preferably, described well heater connects the afterheat steam pipe.When the Heating temperature of well heater is not enough, can feed the steam more than 170 ℃ by the afterheat steam pipe, high temperature esterification water is heated.
As preferably, the described second esterification tank is through the water inlet of cross current interchanger.The hot water that also has surplus heat after a part heats slurry can also be extracted into interchanger by water pump and cool off once more, is sent back to the process tower place then.
As preferably, described process tower is provided with TP, and the exit of process tower is provided with pressure regulator valve.TP is the interior temperature of monitoring process tower automatically, thereby whether selection opens freezing unit, interchanger is lowered the temperature.Pressure transmitter can be monitored the water yield that process tower comes out, thereby the control automatic regulating valve is regulated flow.
As preferably, in the outlet of described freezing unit, the esterification water collecting groove, the slurry inlet of the outlet of the outlet of interchanger, well heater, slurry preheater all is provided with thermometer with the hot water outlet place that adds of slurry outlet place, slurry preheater.Thermometer can be monitored the temperature of each equipment in real time.
As preferably, described esterification water collecting groove, the first esterification tank, the second esterification tank place all are provided with water pump.Water pump can be extracted into hot water in the required equipment.
As preferably, the slurry of described slurry preheater inlet is communicated with the slurry transfer lime, and the exit of slurry transfer lime and interchanger all is provided with under meter, and the slurry outlet place of slurry preheater also is provided with tensimeter.Under meter can be monitored the flow of water in the pipeline, slurry, and tensimeter can be monitored the pressure size of slurry gangway.
Temperature to the technology cat head is adjusted between 100-105 ℃, and pressure is adjusted between 0.5-5.0 kPa.To being adjusted between the 1.1-1.3. of slurry mole, the slurry transfer pressure is set between the 4.5-6.5 kilogram.Slurry temperature is between 40-50 before transforming.Through improving 20 degree after the exchange.
Therefore, the utility model utilizes air cooling heat exchanger, freezing unit all to cool off the hot water that process tower comes out in any season, and through water cooling heat exchanger esterification water is cooled off once more, and the heat exchange effect is better; Through high temperature esterification water is passed in the slurry preheater, can preheat in addition, make that the slurry temperature before the esterification improves more than 20 ℃, improve production efficiency slurry, simple and reasonable for structure.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the utility model.
Component, position and numbering among the figure: process tower 1, high-temperature steam pipe 2, air cooling heat exchanger 3, freezing unit 4, esterification water collecting groove 5, water pipe 6, interchanger 7, the first esterification tank 8, stripping tower 9, blow-down pipe 10, well heater 11, slurry preheater 12, the second esterification tank 13, TP 14, pressure regulator valve 15, thermometer 16, water pump 17, under meter 18, tensimeter 19.
Embodiment
Pass through embodiment below, and combine accompanying drawing, do further bright specifically the technical scheme of the utility model.
Embodiment: a kind of polymerization waste heat of this example utilizes system again, like Fig. 1, a process tower 1 is arranged, and process tower is provided with TP 14, and the exit of process tower is provided with pressure regulator valve 15.Process tower is connected with air cooling heat exchanger 3, freezing unit 4 respectively through high-temperature steam pipe 2; Air cooling heat exchanger, freezing unit all are connected with esterification water collecting groove 5; The esterification water collecting groove connects interchanger 7, the first esterification tank 8 respectively through water pipe 6, and interchanger is provided with refrigerated water import, chilled water outlet, and interchanger connects process tower through water pipe; The first esterification tank is connected with stripping tower 9, and stripping tower connects boiler through blow-down pipe 10.The esterification water collecting groove also is connected with well heater 11 through water pipe, and well heater is communicated with the afterheat steam pipe.Well heater connects slurry preheater 12 through water pipe; Slurry preheater inside is provided with the slurry pipe that can feed slurry; Slurry pipe is communicated with slurry inlet and slurry outlet, and the slurry inlet is communicated with the slurry transfer lime, and slurry outlet is communicated with esterification equipment; The slurry preheater connects the water inlet that the second esterification tank, 13, the second esterification tanks connect the first esterification tank 8, boiler, interchanger 7 respectively through water pipe.In the outlet of freezing unit 4, esterification water collecting groove 5, the slurry inlet of the outlet of the outlet of interchanger 7, well heater 11, slurry preheater 12 all is provided with thermometer 16 with the hot water outlet place that adds of slurry outlet place, slurry preheater.Esterification water collecting groove 5, the first esterification tank 8, the second esterification tank, 13 places all are provided with water pump 17.The slurry inlet of slurry preheater 12 is communicated with the slurry transfer lime, and the exit of slurry transfer lime and interchanger 7 all is provided with under meter 18, and the slurry outlet place of slurry preheater also is provided with tensimeter 19.
During use, the steps include:
A. 100-105 ℃ the high-temperature steam that process tower 1 is come out is passed into air cooling heat exchanger 3 or freezing unit 4 cools off; The leaving water temperature(LWT) of air cooling heat exchanger is 85-90 ℃; The leaving water temperature(LWT) of freezing unit is 75-80 ℃, and cooled water enters into esterification water collecting groove 5, and the temperature in the esterification water collecting groove is about 90 ℃; The first esterification tank 8 is delivered in part esterification water transport; Deliver to boiler via stripping tower 9, blow-down pipe 10, a part of esterification water is extracted into interchanger 7 places by water pump 17 and carries out processing under cooling, and then transports back process tower;
B. a part of water coolant that is come out by esterification water collecting groove 5 is passed into well heater 11 places and heats; The inflow temperature of well heater 11 is 85-90 ℃; Hot water is passed in the slurry preheater 12, feeds slurry in the slurry pipe in the slurry preheater, and hot water promptly preheats the slurry that needs esterification; Slurry after the heating is gone out from slurry outlet and is sent to esterification; The slurry temperature at slurry preheater slurry outlet place is 60-70 ℃, and the water that the water after heating is accomplished is passed in the second esterification tank, 13, the second esterification tanks is directly sent to boiler by blow-down pipe; Perhaps be transported to boiler, return to process tower 1 after perhaps being extracted into the cooling of interchanger 7 places by water pump through the first esterification tank 8, stripping tower 9, blow-down pipe.
The poly-unit that one cover is 1000 tons/day improves slurry 20 and spends the whole year and can practice thrift about 4500 tons of standard coal equivalents advancing an esterification as utilizing waste heat, and air cooling heat exchanger 3 leaving water temperature(LWT)s are when 65 degree are brought up to the 85-90 degree and can be economized on electricity 95904KW/ the whole year.
The above is merely the specific embodiment of the utility model; But the constitutional features of the utility model is not limited thereto; Any those skilled in the art is in the field of the utility model, and variation of being done or modification all are encompassed among the claim of the utility model.
Claims (8)
1. a polymerization waste heat utilizes system again; Comprise process tower (1); It is characterized in that described process tower (1) is connected with air cooling heat exchanger (3), freezing unit (4) respectively through high-temperature steam pipe (2), air cooling heat exchanger, freezing unit all are connected with esterification water collecting groove (5), and the esterification water collecting groove connects interchanger (7), the first esterification tank (8) respectively through water pipe (6); Interchanger is provided with refrigerated water import, chilled water outlet; Interchanger connects process tower through water pipe, and the first esterification tank is connected with stripping tower (9), and stripping tower connects boiler through blow-down pipe (10).
2. a kind of polymerization waste heat according to claim 1 utilizes system again; It is characterized in that described esterification water collecting groove (5) is connected with well heater (11) through water pipe; Well heater connects slurry preheater (12) through water pipe, and slurry preheater inside is provided with the slurry pipe that can feed slurry, and slurry pipe is communicated with slurry inlet and slurry outlet; The slurry inlet is communicated with the slurry transfer lime; Slurry outlet is communicated with esterification equipment, and the slurry preheater connects the second esterification tank (13) through water pipe, and the second esterification tank connects the first esterification tank (8), boiler respectively.
3. a kind of polymerization waste heat according to claim 2 utilizes system again, it is characterized in that described well heater (11) connects the afterheat steam pipe.
4. utilize system again according to claim 2 or 3 described a kind of polymerization waste heats, it is characterized in that the water inlet of the described second esterification tank (13) through cross current interchanger (7).
5. utilize system again according to claim 1 or 2 or 3 described a kind of polymerization waste heats, it is characterized in that described process tower (1) is provided with TP (14), the exit of process tower is provided with pressure regulator valve (15).
6. utilize system again according to claim 2 or 3 described a kind of polymerization waste heats, it is characterized in that in the outlet, esterification water collecting groove (5) of described freezing unit (4), the slurry inlet of the outlet of the outlet of interchanger (7), well heater (11), slurry preheater (12) all is provided with thermometer (16) with the hot water outlet place that adds of slurry outlet place, slurry preheater.
7. utilize system again according to claim 2 or 3 described a kind of polymerization waste heats, it is characterized in that described esterification water collecting groove (5), the first esterification tank (8), the second esterification tank (13) locate all to be provided with water pump (17).
8. utilize system again according to claim 2 or 3 described a kind of polymerization waste heats; The slurry inlet that it is characterized in that described slurry preheater (12) is communicated with the slurry transfer lime; The exit of slurry transfer lime and interchanger (7) all is provided with under meter (18), and the slurry outlet place of slurry preheater also is provided with tensimeter (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204764317U CN202415426U (en) | 2011-11-25 | 2011-11-25 | System for recycling polymerization waste heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204764317U CN202415426U (en) | 2011-11-25 | 2011-11-25 | System for recycling polymerization waste heat |
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| Publication Number | Publication Date |
|---|---|
| CN202415426U true CN202415426U (en) | 2012-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204764317U Withdrawn - After Issue CN202415426U (en) | 2011-11-25 | 2011-11-25 | System for recycling polymerization waste heat |
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| Country | Link |
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| CN (1) | CN202415426U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102453248A (en) * | 2011-11-25 | 2012-05-16 | 浙江华欣新材料股份有限公司 | Reuse system for polymerization waste heat and method thereof |
| WO2014144386A1 (en) * | 2013-03-15 | 2014-09-18 | Invista Technologies S.A.R.L. | Thermosiphon esterifier steam reuse |
| CN104231252A (en) * | 2014-09-01 | 2014-12-24 | 桐昆集团股份有限公司 | Polyester waste heat utilization device |
-
2011
- 2011-11-25 CN CN2011204764317U patent/CN202415426U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102453248A (en) * | 2011-11-25 | 2012-05-16 | 浙江华欣新材料股份有限公司 | Reuse system for polymerization waste heat and method thereof |
| CN102453248B (en) * | 2011-11-25 | 2013-12-18 | 浙江华欣新材料股份有限公司 | Reuse system for polymerization waste heat and method thereof |
| WO2014144386A1 (en) * | 2013-03-15 | 2014-09-18 | Invista Technologies S.A.R.L. | Thermosiphon esterifier steam reuse |
| CN105209409B (en) * | 2013-03-15 | 2017-03-08 | 因温斯特技术公司 | Thermal siphon esterification device steam recycles |
| CN104231252A (en) * | 2014-09-01 | 2014-12-24 | 桐昆集团股份有限公司 | Polyester waste heat utilization device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120905 Effective date of abandoning: 20131218 |
|
| RGAV | Abandon patent right to avoid regrant |