CN212504423U - Gasification slag water three-level flash evaporation condensate recycling system - Google Patents
Gasification slag water three-level flash evaporation condensate recycling system Download PDFInfo
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- CN212504423U CN212504423U CN202021190731.4U CN202021190731U CN212504423U CN 212504423 U CN212504423 U CN 212504423U CN 202021190731 U CN202021190731 U CN 202021190731U CN 212504423 U CN212504423 U CN 212504423U
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Abstract
The utility model provides a tertiary flash distillation condensate recycle system of gasification sediment water, include: the system comprises an evaporation hot water tower, a high-temperature hot water tank, an acid-gas separator, a low-pressure flash tank, a vacuum flash separator, a low-pressure flash separator, a settling tank, an ash water tank, an acid gas condenser, a low-pressure flash condenser, a vacuum flash cooler, a high-temperature hot water pump, a low-pressure ash water pump and a flushing water pump. The utility model provides a gasification slag water tertiary flash evaporation condensate recycle system can effectively handle a large amount of black water that multinozzle opposed gasification and coal gas preliminary purification process produced, and the black water after the processing is grey water, and some grey water can be directly discharged, can not the polluted environment; the other part of the grey water can be used as a heat source to flow back to the evaporation hot water tower T1302, so that the heat of the grey water can be effectively utilized, and the effect of efficiently utilizing resources is realized.
Description
Technical Field
The utility model belongs to the technical field of gasification slag water recycle, concretely relates to tertiary flash distillation condensate recycle system of gasification slag water.
Background
Coal water slurries have a fluidity similar to heavy oil and are therefore also referred to as oil substitutes. The coal water slurry is convenient to store at normal temperature and is suitable for various transportation modes. The heating value of the coal water slurry is approximately 21MJ/kg, namely 2t of the coal water slurry is equivalent to 1t of the heating value of the heavy oil. Therefore, the coal water slurry can be used as fuel coal water slurry for industrial production and power plant power generation.
In the existing coal water slurry preparation process, a large amount of black water is generated in the processes of multi-nozzle opposed gasification and coal gas preliminary purification, and the black water is acidic, so that the direct discharge causes serious environmental pollution. How to effectively carry out post-treatment on black water and avoid polluting the environment is a matter which is urgently needed to be solved at present.
SUMMERY OF THE UTILITY MODEL
The defect to prior art existence, the utility model provides a tertiary flash distillation condensate recycle system of gasification slag water can effectively solve above-mentioned problem.
The utility model adopts the technical scheme as follows:
the utility model provides a tertiary flash distillation condensate recycle system of gasification sediment water, include: the system comprises an evaporation hot water tower (T1302), a high-temperature hot water tank (V1301), an acid gas separator (V1302), a low-pressure flash tank (V1303), a vacuum flash tank (V1304), a vacuum flash separator (V1305), a low-pressure flash separator (V1306), a settling tank (V1307), an ash water tank (V1308), an acid gas condenser (E1302), a low-pressure flash condenser (E1306), a vacuum flash cooler (E1305), a high-temperature hot water pump (P1301), a low-pressure ash water pump (P1302) and a flushing water pump (P1303);
the lower cavity of the evaporation hot water tower (T1302) is an evaporation chamber, and the upper cavity of the evaporation hot water tower is a hot water chamber; the evaporation chamber is communicated with the hot water chamber through a steam conveying pipeline; a black water inlet is formed in the bottom of an evaporation chamber of the evaporation hot water tower (T1302); the water inlet of the hot water chamber of the evaporation hot water tower (T1302) is communicated with the ash water tank (V1308) through a low-pressure ash water pump (P1302); a water outlet of a hot water chamber of the evaporation hot water tower (T1302) is communicated with the high-temperature hot water tank (V1301); a water outlet of the high-temperature hot water tank (V1301) is communicated to the middle part of the washing tower through a high-temperature hot water pump (P1301);
the steam outlet of the evaporation chamber of the evaporation hot water tower (T1302) is communicated with the steam inlet of the acid gas separator (V1302) through the acid gas condenser (E1302); the liquid outlet of the acid-gas separator (V1302) is communicated with the inlet of the ash water tank (V1308);
a liquid outlet at the bottom of an evaporation chamber of the evaporation hot water tower (T1302) is communicated with a liquid inlet of the low-pressure flash tank (V1303); the steam discharge port of the low-pressure flash tank (V1303) is communicated to the inlet of the low-pressure flash separator (V1306) after passing through the low-pressure flash condenser (E1306); the liquid outlet of the low-pressure flash separator (V1306) is communicated with the inlet of the ash water tank (V1308);
the liquid outlet of the low-pressure flash tank (V1303) is communicated with the liquid inlet of the vacuum flash tank (V1304); the steam discharging port of the vacuum flash tank (V1304) is communicated with the inlet of the vacuum flash separator (V1305) after passing through the vacuum flash cooler (E1305); the liquid outlet of the vacuum flash separator (V1305) is communicated with the inlet of the ash water tank (V1308);
the liquid outlet of the vacuum flash tank (V1304) is communicated with the liquid inlet of the settling tank (V1307), and the clear water overflow port of the settling tank (V1307) is communicated with the inlet of the ash water tank (V1308);
the liquid outlet of the ash trough (V1308) is communicated to the outside through the washing water pump (P1303);
the liquid outlet of the low-pressure flash separator (V1306), the liquid outlet of the vacuum flash separator (V1305) and the liquid outlet of the acid-gas separator (V1302) are also communicated with a liquid inlet of the low-pressure ash water pump (P1302).
Preferably, the flushing water pump (P1303) adopts a lock bucket flushing water pump.
The utility model provides a tertiary flash distillation condensate recycle system of gasification sediment water has following advantage:
the utility model provides a gasification slag water tertiary flash evaporation condensate recycle system can effectively handle a large amount of black water that multinozzle opposed gasification and coal gas preliminary purification process produced, and the black water after the processing is grey water, and some grey water can be directly discharged, can not the polluted environment; the other part of the grey water can be used as a heat source to flow back to the evaporation hot water tower T1302, so that the heat of the grey water can be effectively utilized, and the effect of efficiently utilizing resources is realized.
Drawings
Fig. 1 is the structure schematic diagram of the gasification slag-water three-stage flash evaporation condensate recycling system provided by the utility model.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The utility model provides a gasification slag water tertiary flash evaporation condensate recycle system can effectively handle a large amount of black water that multinozzle opposed gasification and coal gas preliminary purification process produced, and the black water after the processing is grey water, and some grey water can be directly discharged, can not the polluted environment; the other part of the grey water can be used as a heat source to flow back to the evaporation hot water tower T1302, so that the heat of the grey water can be effectively utilized, and the effect of efficiently utilizing resources is realized.
Referring to fig. 1, the gasification slag-water three-stage flash evaporation condensate recycling system comprises: an evaporation hot water tower T1302, a high-temperature hot water tank V1301, an acid gas separator V1302, a low-pressure flash tank V1303, a vacuum flash tank V1304, a vacuum flash separator V1305, a low-pressure flash separator V1306, a settling tank V1307, a grey water tank V1308, an acid gas condenser E1302, a low-pressure flash condenser E1306, a vacuum flash cooler E1305, a high-temperature hot water pump P1301, a low-pressure grey water pump P1302 and a flushing water pump P1303; wherein, in practical application, the flushing water pump P1303 adopts a lock bucket flushing water pump.
The lower cavity of the evaporation hot water tower T1302 is an evaporation chamber, and the upper cavity is a hot water chamber; the evaporation chamber is communicated with the hot water chamber through a steam conveying pipeline; a black water inlet is formed at the bottom of an evaporation chamber of the evaporation hot water tower T1302; the water inlet of the hot water chamber of the evaporation hot water tower T1302 is communicated with the grey water tank V1308 through a low-pressure grey water pump P1302; a water outlet of a hot water chamber of the evaporation hot water tower T1302 is communicated with the high-temperature hot water tank V1301; the water outlet of the high-temperature hot water tank V1301 is communicated to the middle part of the washing tower through a high-temperature hot water pump P1301;
the steam outlet of the evaporation chamber of the evaporation hot water tower T1302 is communicated with the steam inlet of the acid gas separator V1302 through the acid gas condenser E1302; the liquid outlet of the acid-gas separator V1302 is communicated with the inlet of the ash water tank V1308;
a liquid outlet at the bottom of the evaporation chamber of the evaporation hot water tower T1302 is communicated with a liquid inlet of the low-pressure flash tank V1303; the steam outlet of the low-pressure flash tank V1303 is communicated to the inlet of the low-pressure flash separator V1306 after passing through the low-pressure flash condenser E1306; the liquid outlet of the low-pressure flash separator V1306 is communicated with the inlet of the ash water tank V1308;
the liquid outlet of the low-pressure flash tank V1303 is communicated with the liquid inlet of the vacuum flash tank V1304; the steam discharge port of the vacuum flash tank V1304 is communicated with the inlet of the vacuum flash separator V1305 after passing through the vacuum flash cooler E1305; the liquid outlet of the vacuum flash separator V1305 is communicated with the inlet of the ash water tank V1308;
the liquid outlet of the vacuum flash tank V1304 is communicated with the liquid inlet of the settling tank V1307, and the clear water overflow port of the settling tank V1307 is communicated with the inlet of the grey water tank V1308;
the liquid outlet of the grey water tank V1308 is communicated to the outside through the flushing water pump P1303;
the liquid outlet of the low-pressure flash separator V1306, the liquid outlet of the vacuum flash separator V1305 and the liquid outlet of the acid-gas separator V1302 are also all communicated with the liquid inlet of the low-pressure grey water pump P1302.
The utility model provides a tertiary flash distillation condensate recycle system of gasification sediment water, its theory of operation is:
1. black water from the bottom of the chilling chamber, the cyclone separator and the washing tower of the gasification furnace is usually at 243 ℃, and is respectively sent into an evaporation chamber at the lower part of the evaporation hot water tower T1302 through pressure reduction, and after evaporation treatment, a part of black water is evaporated into water vapor and enters a hot water chamber at the upper part of the evaporation hot water tower T1302; meanwhile, the low pressure grey water pump P1302 takes about 78 degrees of grey water from the grey water tank V1308 and injects it into the hot water chamber; therefore, the water vapor and the grey water are directly contacted with each other in the hot water chamber for heat exchange to obtain cold liquid and a small amount of water vapor;
cold liquid formed in the hot water chamber is hot water, flows into a high-temperature hot water tank V1301 for storage, is about 170 ℃, is sent to the middle part of the washing tower through a high-temperature hot water pump P1301 and is used as washing liquid of the washing tower, and the hot water is effectively utilized;
the flash gas which is not condensed after heat exchange enters an acid gas condenser E1302 for condensation, then enters an acid gas separator V1302 for gas-liquid separation, the acid gas is discharged to a torch for burning after passing through a valve, and the condensate is sent to an ash water tank V1308 through a liquid level regulating valve; thereby realizing the recycling of the condensate of the flash gas;
2. concentrated black water is discharged from the bottom of an evaporation chamber of the evaporation hot water tower T1302, and is discharged into a low-pressure flash tank V1303 for further flash evaporation after passing through a liquid level regulating valve, flash steam generated by the low-pressure flash tank V1303 is sent into a low-pressure flash condenser E1306 for condensation, and then enters a low-pressure flash separator V1306 for gas-liquid separation, acid gas is discharged into a torch after passing through a valve and is burnt, and condensate is sent into a grey water tank V1308 through the liquid level regulating valve; thereby realizing the recycling of the condensate of the flash gas;
the concentrated black water generated by the low-pressure flash tank V1303 enters a vacuum flash tank V1304 through a liquid level regulating valve;
3. the black water is subjected to vacuum flash evaporation in a vacuum flash evaporation tank V1304, a large amount of flash evaporation steam which is flashed off is released and sent to a vacuum flash evaporation cooler E1305 for condensation, then the vapor and liquid are separated in a vacuum flash evaporation separator V1305, the acid gas is discharged to a torch through a valve and burnt, and the condensate is sent to an ash water tank V1308 through a liquid level regulating valve; thereby realizing the recycling of the condensate of the flash gas;
the concentrated black water generated by the vacuum flash tank V1304 has increased solid content and further reduced temperature, flows into a settling tank V1307 after being pressurized, and clear water at the upper part of the settling tank overflows into an ash water tank V1308; therefore, after the treatment of the settling tank V1307, the hardness of the water entering the grey water tank V1308 is ensured to be lower, the environment is not polluted, and the water can be recycled;
finally, the hardness of the grey water in the grey water tank V1308 reaches 10 mg/l; the grey water in grey water tank V1308 is divided into two ways: one path of the water passes through a low-pressure grey water pump P1302 and is sent to a hot water chamber at the upper part of an evaporation hot water tower T1302 to be heated for a washing tower; the other path is discharged to the outside through a flushing water pump P1303;
in addition, in the application, because the hardness of the condensate generated by the three-stage flash evaporation is lower, part of the condensate generated by the three-stage flash evaporation can be directly sent to the hot water chamber at the upper part of the evaporation hot water tower T1302 without flowing into the grey water tank V1308, so that the water quality of the evaporation hot water tower T1302 is further ensured, and the effective utilization of the heat of the condensate generated by the three-stage flash evaporation is realized.
Therefore, in the utility model, the acid-gas separator V1302 realizes the recycling of the condensate of the first-stage flash steam; the low-pressure flash separator V1306 realizes the recycling of the condensate of the secondary flash steam; the vacuum flash separator V1305 realizes the recycling of the condensate of the three-stage flash steam; thereby comprehensively realizing the recycling of the condensate after the black water treatment and saving energy.
Through the multi-stage purification treatment of the black water, the solid contained in the black water is separated out through a settling tank, and the acid gas in the black water is effectively separated out, so that the effective purification of the black water is realized, and the pollution of the black water discharge to the environment is avoided; in addition, the heat contained in the black water is recovered, so that the treated grey water is returned to the system for reuse.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.
Claims (2)
1. The utility model provides a three-level flash evaporation condensate recycle system of gasification slag water which characterized in that includes: the system comprises an evaporation hot water tower (T1302), a high-temperature hot water tank (V1301), an acid gas separator (V1302), a low-pressure flash tank (V1303), a vacuum flash tank (V1304), a vacuum flash separator (V1305), a low-pressure flash separator (V1306), a settling tank (V1307), an ash water tank (V1308), an acid gas condenser (E1302), a low-pressure flash condenser (E1306), a vacuum flash cooler (E1305), a high-temperature hot water pump (P1301), a low-pressure ash water pump (P1302) and a flushing water pump (P1303);
the lower cavity of the evaporation hot water tower (T1302) is an evaporation chamber, and the upper cavity of the evaporation hot water tower is a hot water chamber; the evaporation chamber is communicated with the hot water chamber through a steam conveying pipeline; a black water inlet is formed in the bottom of an evaporation chamber of the evaporation hot water tower (T1302); the water inlet of the hot water chamber of the evaporation hot water tower (T1302) is communicated with the ash water tank (V1308) through a low-pressure ash water pump (P1302); a water outlet of a hot water chamber of the evaporation hot water tower (T1302) is communicated with the high-temperature hot water tank (V1301); a water outlet of the high-temperature hot water tank (V1301) is communicated to the middle part of the washing tower through a high-temperature hot water pump (P1301);
the steam outlet of the evaporation chamber of the evaporation hot water tower (T1302) is communicated with the steam inlet of the acid gas separator (V1302) through the acid gas condenser (E1302); the liquid outlet of the acid-gas separator (V1302) is communicated with the inlet of the ash water tank (V1308);
a liquid outlet at the bottom of an evaporation chamber of the evaporation hot water tower (T1302) is communicated with a liquid inlet of the low-pressure flash tank (V1303); the steam discharge port of the low-pressure flash tank (V1303) is communicated to the inlet of the low-pressure flash separator (V1306) after passing through the low-pressure flash condenser (E1306); the liquid outlet of the low-pressure flash separator (V1306) is communicated with the inlet of the ash water tank (V1308);
the liquid outlet of the low-pressure flash tank (V1303) is communicated with the liquid inlet of the vacuum flash tank (V1304); the steam discharging port of the vacuum flash tank (V1304) is communicated with the inlet of the vacuum flash separator (V1305) after passing through the vacuum flash cooler (E1305); the liquid outlet of the vacuum flash separator (V1305) is communicated with the inlet of the ash water tank (V1308);
the liquid outlet of the vacuum flash tank (V1304) is communicated with the liquid inlet of the settling tank (V1307), and the clear water overflow port of the settling tank (V1307) is communicated with the inlet of the ash water tank (V1308);
the liquid outlet of the ash trough (V1308) is communicated to the outside through the washing water pump (P1303);
the liquid outlet of the low-pressure flash separator (V1306), the liquid outlet of the vacuum flash separator (V1305) and the liquid outlet of the acid-gas separator (V1302) are also communicated with a liquid inlet of the low-pressure ash water pump (P1302).
2. The three-stage flash evaporation condensate recycling system for gasification slag water according to claim 1, wherein the flushing water pump (P1303) is a lock bucket flushing water pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021190731.4U CN212504423U (en) | 2020-06-23 | 2020-06-23 | Gasification slag water three-level flash evaporation condensate recycling system |
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| CN202021190731.4U CN212504423U (en) | 2020-06-23 | 2020-06-23 | Gasification slag water three-level flash evaporation condensate recycling system |
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| CN212504423U true CN212504423U (en) | 2021-02-09 |
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| CN202021190731.4U Active CN212504423U (en) | 2020-06-23 | 2020-06-23 | Gasification slag water three-level flash evaporation condensate recycling system |
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Address after: 277527 Mushi Town, Tengzhou City, Zaozhuang City, Shandong Province (resident) Patentee after: Lianhong (Shandong) Chemical Co.,Ltd. Address before: 277527 Mushi Town, Tengzhou City, Zaozhuang City, Shandong Province (resident) Patentee before: XINNENG FENGHUANG (TENGZHOU) ENERGY CO.,LTD. |
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