CN204251456U - Evaporative crystallization is adopted to realize the device of Coal Chemical Industry height strong brine recycling - Google Patents

Evaporative crystallization is adopted to realize the device of Coal Chemical Industry height strong brine recycling Download PDF

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Publication number
CN204251456U
CN204251456U CN201420722114.2U CN201420722114U CN204251456U CN 204251456 U CN204251456 U CN 204251456U CN 201420722114 U CN201420722114 U CN 201420722114U CN 204251456 U CN204251456 U CN 204251456U
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China
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output terminal
connects
chemical industry
coal chemical
nacl
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CN201420722114.2U
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Chinese (zh)
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兰建伟
苏志峰
朱春福
李朝晖
徐文军
江晶
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深圳能源资源综合开发有限公司
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Abstract

Adopt evaporative crystallization to realize a device for Coal Chemical Industry height strong brine recycling, the dense water of Coal Chemical Industry height salt is carried out evaporation concentration, evaporative crystallization, shwoot, crystallization, thickening, centrifugation, drying, packaging process, obtains NaCl and Na 2sO 4two kinds of technical grade crystal salt, can directly sell as outside Industrial Salt, to not only reduce in existing Coal Chemical Engineering Project high strong brine to the pollution of environment, and achieve the recycling that system produces crystal salt.

Description

Evaporative crystallization is adopted to realize the device of Coal Chemical Industry height strong brine recycling

Technical field

The utility model belongs to coal chemical industrial waste water processing technology field, specifically just relates to a kind of device adopting evaporative crystallization to realize Coal Chemical Industry height strong brine recycling.

Background technology

Modern Coal-based Chemical industry take coal as raw material, makes coal be converted into gas, liquid and solid phase prod, and be processed into the infant industry of a series of Chemicals further through chemical process.It mainly comprises coal gasification, liquidation of coal, tar is chemical, carbide acetylene is chemical; in recent years; Developing Coal Chemical Industry is rapid; but; because Chemical Industry needs to consume a large amount of water; the water resources recycling thereupon brought becomes increasingly conspicuous with environmental protection problem, and the area being especially in many droughts short of rain is comparatively outstanding.Therefore, the environmental issue of Coal Chemical Industry urgently needs to solve.

Solve the environmental issue of Coal Chemical Industry, first will solve the process of Coal Chemical Industry haline water and emission problem.The various medicament that salinity in Coal Chemical Industry haline water mainly comes from recirculated water, de-mineralized water preparation process is brought into and concentrated and add in Industrial Wastewater Treatment and recycling process and the strong brine of generation.Coal Chemical Industry haline water totally presents that quantity discharged is large, change of water quality is little, saltiness is stable and general higher, and especially chloride ion content is higher, and its composition form mainly exists for master with organism and inorganic salts form, wherein, and NH 4 +-N content is lower, and COD generally can reach 50000 ~ 80000mg/L at 200 ~ 800mg/L, TDS, water body sensory trait is good, limpidly to reveal the exact details, without obvious peculiar smell, but colourity is higher, calcium magnesium silicon equal size is high, and the ion containing the easy fouling such as sulfate radical, phosphate radical, carbonate.

A kind of important method that Coal Chemical Industry height strong brine realizes real zero release is separated by salt solution by evaporative crystallization, and wherein water of condensation fully recovering, crystal salt are up to standard sells outward.And evaporative crystallization technique has been widely used at process Coal Chemical Industry height strong brine, mechanical steam compression evaporating is concentrated, to carry out recycling treatment to Coal Chemical Industry height strong brine be that a kind of common its technology energy consumption of Coal Chemical Industry height strong brine process work is low, running cost to mechanical vapor-compression (MVR) crystallization processes technology, floor space is little, general facilities is supporting few, level of automation is high, but needs when initiating switchup to consume a certain amount of steam; And mechanical vapor-compression system fading margin load is relatively little, is only 75 ~ 105%, equipment failure rate is relatively high.Generally be applicable to the sufficient and area that energy value is relatively low of electric energy, or there is no the region of excess steam.

No matter another aspect is that mechanical vapor-compression technology or multiple-effect evaporation crystallization technique realize high strong brine " near zero release ", and the concentrated solution that system produces drains into " it is useless that mixed salt becomes danger " of evaporation pond or crystallization generation usually; And the limited steam capability of evaporation pond and mixed salt can be managed as the useless place of danger and bring high processing costs.Therefore, mechanical vapor-compression technology or the multiple-effect evaporation crystallization treatment technology of traditional at present Coal Chemical Industry high-salt wastewater all cannot accomplish real environmental protection.

Utility model content

The purpose of this utility model be for having in existing Coal Chemical Industry height strong brine treating processes that energy consumption is large, cost is high, system can not continuous and steady operation, generation crystal salt be that mixed salt cannot the technical problem of recycling, provide a kind of device adopting evaporative crystallization to realize Coal Chemical Industry height strong brine recycling, the dense water of Coal Chemical Industry height salt is carried out evaporation concentration, evaporative crystallization, shwoot, crystallization, thickening, centrifugation, drying, packaging process, obtains NaCl and Na 2sO 4two kinds of technical grade crystal salt, can directly sell as outside Industrial Salt, to not only reduce in existing Coal Chemical Engineering Project high strong brine to the pollution of environment, and achieve the recycling that system produces crystal salt.

Technical scheme

A kind of device adopting evaporative crystallization to realize Coal Chemical Industry height strong brine recycling, it is characterized in that: it comprises former pond, described former pond is connected with preliminary heating device, connecting pipeline is equipped with intake pump, the output terminal of preliminary heating device connects Falling-film evaporator, Falling-film evaporator turns material to sulfate crystal tank through transfering material pump, and the secondary steam of Falling-film evaporator connects mechanical vapor-compression blower fan one, and the water of condensation output terminal of Falling-film evaporator connects back preliminary heating device; The secondary steam of sulfate crystal tank connects mechanical vapor-compression blower fan two, and the water of condensation output terminal of sulfate crystal tank connects back preliminary heating device, and sulfate crystal tank mother liquor output terminal connects flash evaporation tank, and sulfate crystal tank slurries output terminal connects thickener one; The concentrated slurry output terminal of thickener one connects whizzer one, and thickener one supernatant liquor is connected back intermediate pool with whizzer one mother liquor output terminal, and the crystal salt output terminal after centrifuge dehydration connects moisture eliminator one; Flash evaporation tank connects sodium-chlor crystallizer through transfering material pump output terminal, NaCl crystallizer mother liquor output terminal connects thickener two, thickener two clear liquid output terminal of going forward connects back NaCl crystallizer, rear clear liquid output terminal connects back biochemical system, after concentrated, NaCl slurries output terminal connects whizzer two, whizzer two mother liquor output terminal connects back NaCl crystallizer, and the NaCl crystal salt output terminal after centrifuge dehydration connects moisture eliminator two.

Further, described moisture eliminator one output terminal connects packaging one, and wrapping machine one output terminal connects the packing bag of Na2SO4 salt, and moisture eliminator two output terminal connects wrapping machine two, and wrapping machine two output terminal connects the packing bag of NaCl salt.

Further, described intermediate pool output terminal connects back sulfate crystal tank, and connecting pipeline is equipped with filtrate pump.

Further, what described Falling-film evaporator adopted is function of mechanical steam recompression MVR Falling-film evaporator.

Beneficial effect

A kind of device adopting evaporative crystallization to realize Coal Chemical Industry height strong brine recycling that the utility model provides, the dense water of Coal Chemical Industry height salt is carried out evaporation concentration, evaporative crystallization, shwoot, crystallization, thickening, centrifugation, drying, packaging process, obtain NaCl and Na2SO4 two kinds of technical grade crystal salt, can directly sell as outside Industrial Salt, to not only reduce in existing Coal Chemical Engineering Project high strong brine to the pollution of environment, and achieve the recycling that system produces crystal salt.

Accompanying drawing explanation

Accompanying drawing 1 is connection diagram of the present utility model.

Accompanying drawing 2 is process flow sheets of the present utility model.

Embodiment

Below in conjunction with drawings and Examples, the utility model is described further.

Embodiment

As shown in Figure 1, a kind of device adopting evaporative crystallization to realize Coal Chemical Industry height strong brine recycling, it is characterized in that: it comprises former pond 1, described former pond 1 is connected with preliminary heating device 3, connecting pipeline is equipped with intake pump 2, the output terminal of preliminary heating device 3 connects Falling-film evaporator 4, and Falling-film evaporator 4 is expected to sulfate crystal tank 7 through transfering material pump 6 turns, the secondary steam of Falling-film evaporator 4 connects mechanical vapor-compression blower fan 1, and the water of condensation output terminal of Falling-film evaporator 4 connects back preliminary heating device 3; The secondary steam of sulfate crystal tank 7 connects mechanical vapor-compression blower fan 28, the water of condensation output terminal of sulfate crystal tank 7 connects back preliminary heating device 3, sulfate crystal tank 7 mother liquor output terminal connects flash evaporation tank 9, and sulfate crystal tank 7 slurries output terminal connects thickener 1; The concentrated slurry output terminal of thickener 1 connects whizzer 1, and thickener 1 supernatant liquor is connected back intermediate pool 23 with whizzer 1 mother liquor output terminal, and the crystal salt output terminal after centrifuge dehydration connects moisture eliminator 1; Flash evaporation tank 9 connects sodium-chlor crystallizer 11 through transfering material pump 10 output terminal, NaCl crystallizer 11 mother liquor output terminal connects thickener 2 17, before thickener 2 17, clear liquid output terminal connects back NaCl crystallizer 11, rear clear liquid output terminal connects back biochemical system 22, after concentrated, NaCl slurries output terminal connects whizzer 2 18, whizzer 2 18 mother liquor output terminal connects back NaCl crystallizer 11, and the NaCl crystal salt output terminal after centrifuge dehydration connects moisture eliminator 2 19.

Described moisture eliminator 1 output terminal connects packaging 1, and wrapping machine 1 output terminal connects Na 2sO 4salt packing bag 16, moisture eliminator 2 19 output terminal connects wrapping machine 2 20, and wrapping machine 2 20 output terminal connects NaCl salt packing bag 21.

Described intermediate pool 23 output terminal connects back sulfate crystal tank 7, connecting pipeline is equipped with filtrate pump 24.

What described Falling-film evaporator 4 adopted is function of mechanical steam recompression Falling-film evaporator.

The technological process utilizing aforesaid device to realize Coal Chemical Industry height strong brine recycling by evaporative crystallization is as follows:

The first step: Coal Chemical Industry height strong brine is delivered to pre-heating system through fresh feed pump, carries out preheating, obtains preheating height strong brine; Wherein, after the water of condensation heat exchange that warm produces, all up to standard time systemic circulation water water charging system utilizes, and realizes the recovery of system thermal, reduces system energy consumption;

Second step: the overheated high strong brine that the first step obtains enters falling-film evaporator and concentrates, the feed liquid after concentrated is through the circulation feed liquid of a transfering material pump part as falling-film evaporator self, and a part of material that turns, to sulfuric acid crystallizer, obtains Na through evaporating further 2sO 4slurries and mother liquor; Falling-film evaporator and sulfate crystal tank all adopt MVR mechanical vapor-compression technique, by the heating steam by mechanical vapor-compression blower fan boil down to high-quality of the secondary steam that produces in tank, not at the external live steam of needs after system equilibrium establishment; The water of condensation that evaporation, crystallisation process produce returns pre-heating system and carries out heat recuperation.

3rd step: the Na that second step obtains 2sO 4slurries enter thickener one, carry out the concentrated of crystal salt, obtain supernatant liquor and concentrated Na 2sO 4slurries, supernatant liquor returns sulfate crystal tank circular treatment; The mother liquor that second step obtains turns material to sodium-chlor crystallizer through flash evaporation tank, carries out condensing crystal, obtains NaCl slurries, and the water of condensation that shwoot and crystallisation process produce returns pre-heating system and carries out heat recuperation.

4th step: the concentrated concentrated rear Na obtained of the 3rd step thickener one 2sO 4slurries enter whizzer one, carry out centrifugation, obtain Na 2sO 4crystal salt and mother liquor, mother liquor returns sulfate crystal tank circular treatment; The NaCl slurries that 3rd one-step chlorination sodium crystallizer obtains enter thickener two, carry out the concentrated of crystal salt, obtain mother liquor and the NaCl slurries after concentrating.

5th step: the 4th step whizzer one is separated the Na obtained 2sO 4crystal salt enters moisture eliminator one, under the saturated live steam heating condition of the low pressure of t < 150 DEG C, carries out drying, is met the Na of GB/T 6009-2003 " industrial anhydrous sodium sulfate " standard 2sO 4crystal; The supernatant liquor that thickener two obtains returns biochemical system, and the NaCl slurries after concentrated enter whizzer two, and carry out centrifugation, obtain NaCl crystal salt and mother liquor, mother liquor returns sodium-chlor crystallizer circular treatment.

6th step: the 5th step whizzer two is separated the NaCl crystal salt obtained and enters moisture eliminator two, under the saturated live steam heating condition of the low pressure of t < 150 DEG C, carry out drying, be met the NaCl crystal of GB/T 5462-2003 " Industrial Salt " standard, mother liquor returns sodium-chlor crystallizer circular treatment.

7th step: the Na obtained in the 5th step and the 6th step 2sO 4salt, NaCl salt enter wrapping machine one, wrapping machine two respectively, pack, and sell as technical grade product is directly outer.

Claims (4)

1. the device adopting evaporative crystallization to realize Coal Chemical Industry height strong brine recycling, it is characterized in that: it comprises former pond (1), described former pond (1) is connected with preliminary heating device (3), intake pump (2) connecting pipeline is equipped with, the output terminal of preliminary heating device (3) connects Falling-film evaporator (4), Falling-film evaporator (4) turns material to sulfate crystal tank (7) through transfering material pump (6), the secondary steam of Falling-film evaporator (4) connects mechanical vapor-compression blower fan one (5), the water of condensation output terminal of Falling-film evaporator (4) connects back preliminary heating device (3), the secondary steam of sulfate crystal tank (7) connects mechanical vapor-compression blower fan two (8), the water of condensation output terminal of sulfate crystal tank (7) connects back preliminary heating device (3), sulfate crystal tank (7) mother liquor output terminal connects flash evaporation tank (9), and sulfate crystal tank (7) slurries output terminal connects thickener one (12), the concentrated slurry output terminal of thickener one (12) connects whizzer one (13), thickener one (12) supernatant liquor is connected back intermediate pool (23) with whizzer one (13) mother liquor output terminal, and the crystal salt output terminal after centrifuge dehydration connects moisture eliminator one (14), flash evaporation tank (9) connects sodium-chlor crystallizer (11) through transfering material pump (10) output terminal, NaCl crystallizer (11) mother liquor output terminal connects thickener two (17), thickener two (17) clear liquid output terminal of going forward connects back NaCl crystallizer (11), rear clear liquid output terminal connects back biochemical system (22), after concentrated, NaCl slurries output terminal connects whizzer two (18), whizzer two (18) mother liquor output terminal connects back NaCl crystallizer (11), and the NaCl crystal salt output terminal after centrifuge dehydration connects moisture eliminator two (19).
2. a kind of device adopting evaporative crystallization to realize Coal Chemical Industry height strong brine recycling as claimed in claim 1, it is characterized in that: described moisture eliminator one (14) output terminal connects packaging one (15), wrapping machine one (15) output terminal connects Na 2sO 4salt packing bag (16), moisture eliminator two (19) output terminal connects wrapping machine two (20), and wrapping machine two (20) output terminal connects NaCl salt packing bag (21).
3. a kind of device adopting evaporative crystallization to realize Coal Chemical Industry height strong brine recycling as claimed in claim 1, it is characterized in that: described intermediate pool (23) output terminal connects back sulfate crystal tank (7), connecting pipeline is equipped with filtrate pump (24).
4. a kind of device adopting evaporative crystallization to realize Coal Chemical Industry height strong brine recycling as claimed in claim 1, is characterized in that: what described Falling-film evaporator (4) adopted is function of mechanical steam recompression (MVR) Falling-film evaporator.
CN201420722114.2U 2014-11-26 2014-11-26 Evaporative crystallization is adopted to realize the device of Coal Chemical Industry height strong brine recycling CN204251456U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105110536A (en) * 2015-08-19 2015-12-02 石家庄工大化工设备有限公司 Recycling method for high-salinity wastewater containing sodium chloride and sodium sulfate
CN105314783A (en) * 2015-10-16 2016-02-10 上海晶宇环境工程股份有限公司 Coal-fired power plant desulfurization waste water zero-emission treating technology and device special for treating technology
CN105461134A (en) * 2015-12-01 2016-04-06 陕西省石油化工研究设计院 Technology and device applied to recycling of high-salinity wastewater in coal chemical industry
CN105523676A (en) * 2015-12-23 2016-04-27 倍杰特国际环境技术股份有限公司 High-salt wastewater zero-discharge evaporation crystallization salt substance-division method
CN106379920A (en) * 2016-11-17 2017-02-08 河北言明化工设备有限公司 Device and method of preparing pure lithium chloride solution by precipitating sodium through evaporation of mixed aqueous solution of lithium chloride and sodium chloride

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105110536A (en) * 2015-08-19 2015-12-02 石家庄工大化工设备有限公司 Recycling method for high-salinity wastewater containing sodium chloride and sodium sulfate
CN105314783A (en) * 2015-10-16 2016-02-10 上海晶宇环境工程股份有限公司 Coal-fired power plant desulfurization waste water zero-emission treating technology and device special for treating technology
CN105461134A (en) * 2015-12-01 2016-04-06 陕西省石油化工研究设计院 Technology and device applied to recycling of high-salinity wastewater in coal chemical industry
CN105523676A (en) * 2015-12-23 2016-04-27 倍杰特国际环境技术股份有限公司 High-salt wastewater zero-discharge evaporation crystallization salt substance-division method
CN108275816A (en) * 2015-12-23 2018-07-13 倍杰特国际环境技术股份有限公司 A kind of high-salinity wastewater zero-emission crystalline salt by evaporation sub-prime device and method
CN108275816B (en) * 2015-12-23 2020-08-11 倍杰特集团股份有限公司 High-salinity wastewater zero-discharge evaporation crystallization salt quality grading device and method
CN106379920A (en) * 2016-11-17 2017-02-08 河北言明化工设备有限公司 Device and method of preparing pure lithium chloride solution by precipitating sodium through evaporation of mixed aqueous solution of lithium chloride and sodium chloride
CN106379920B (en) * 2016-11-17 2018-02-06 河北言明化工设备有限公司 Lithium chloride sodium chloride mixed aqueous solution evaporation analysis sodium produces the device and method of pure lithium chloride solution

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