CN205473146U

CN205473146U - Strong brine crystal separation device of area washing leg

Info

Publication number: CN205473146U
Application number: CN201620043410.9U
Authority: CN
Inventors: 施明清; 徐继峥; 卢少红; 任晓惠
Original assignee: TONGFANG ENVIRONMENT CO Ltd
Current assignee: TONGFANG ENVIRONMENT CO Ltd
Priority date: 2016-01-18
Filing date: 2016-01-18
Publication date: 2016-08-17
Anticipated expiration: 2026-01-18

Abstract

Strong brine crystal separation device of area washing leg relates to the waste water treatment technology in environmental protection technology field. The utility model discloses a crystallizer, mother liquor separator, circulating pump and the heater that form circulation pipeline connect gradually. Structurally, the bottom in crystallizer lower part toper chamber no. 1 is equipped with the washing leg of tubular type. Be equipped with strong brine import and strong brine import down on the lateral wall of washing leg respectively, central parallel connection connect perpendicular decurrent spout in the connecting line of going up strong brine import and strong brine import down extended to respectively and washs the leg. It exports to be equipped with salt crystal between the opposite side of washing leg lateral wall, two the imported level. Compared with the prior art, the utility model discloses can effective recycling waste water zero release or the produced solid waste of near zero emission in naCl and na2SO4 salt -mixture.

Description

The strong brine Crystallization Separation device of band washing lower limb

Technical field

This utility model relates to the wastewater processing technology of environmental technology field, particularly the strong brine Crystallization Separation device of band washing lower limb.

Background technology

Can produce substantial amounts of brine waste in the commercial production such as oil, Coal Chemical Industry, electric power, these waste water, by after reuse, produce a small amount of high slat-containing wastewater.In prior art, generally use the crystal system comprising crystallizer to continue to concentrate to brine waste, to realize zero-emission or the near-zero release of waste water, finally produce a certain amount of containing various inorganic salinities and organic solid waste.Owing to this type of solid waste is defined as danger wastes in China, processing cost is high, so that operating cost sharply increases.

By above-mentioned solid waste is carried out component analysis, its inorganic salt accounts for the overwhelming majority, particularly NaCl and Na₂SO₄Two kinds of salt-mixtures content more than 90%.If being separated with other materials by salt-mixture, then can reduce the solid waste of more than 90%, NaCl and Na simultaneously₂SO₄Salt-mixture is alternatively arranged as the raw material of sal prunella coproduction industry, is not only substantially reduced the landfill expense of solid waste, it is also possible to turn waste into wealth, produces certain economic benefit.

Summary of the invention

For above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide the strong brine Crystallization Separation device of a kind of band washing lower limb.NaCl and Na in solid waste produced by its energy efficient recovery wastewater zero discharge or near-zero release₂SO₄Salt-mixture.

In order to reach foregoing invention purpose, the technical solution of the utility model realizes as follows:

The strong brine Crystallization Separation device of band washing lower limb, it includes being in turn connected to form the crystallizer of circulation line, mother solution separator, circulating pump and heater.It is structurally characterized in that, the bottom in described crystallizer lower taper chamber one is provided with the washing lower limb of tubular type.Being respectively equipped with strong brine import and lower strong brine import on the sidewall of washing lower limb, the connecting line of upper strong brine import and lower strong brine import extends respectively into washing Tui Nei center and connects spout vertically downward.Washing is provided with crystal salt outlet between the opposite side of lower limb sidewall, two import level heights.

This utility model, owing to have employed said structure, makes washing lower limb play the effects such as collection salt, classification, washing, back dissolving soluble impurity, conveying, is one of critical component improving crystal salt quality.Washing lower limb utilizes the internal structure of its particular design to provide suitable speed and uniform fluidization, can efficiently eluriate, cools down, classify and thickening.The salt constantly crystallized out in crystallizer is brilliant, because gravity relationship moves downward, progressively drops into washing lower limb from conical cavity one.Strong brine enters from washing lower limb bottom, rise and crystal salt countercurrent washing along lower limb wall, the difference of solution saturation on crystal face can be eliminated, solution is made to be not likely to produce inclusion enclave, the most also can reduce the thickness of diffusion layer near crystal face, make impurity be not easily accessible crystal, thus by the Impurity removal such as COD, nitrate, improve the quality of crystal salt.In this utility model structure, strong brine has carried out heat exchange with salt slurry antikinesis, reduces salt discharge temperature, reduces heat lost by brine.

With detailed description of the invention, this utility model is described further below in conjunction with the accompanying drawings.

Accompanying drawing explanation

Fig. 1 is this utility model connection diagram；

Fig. 2 is the structural representation washing lower limb in this utility model.

Detailed description of the invention

Referring to Fig. 1 and Fig. 2, the strong brine Crystallization Separation device of this utility model band washing lower limb, it includes being in turn connected to form the crystallizer 7 of circulation line, mother solution separator 10, circulating pump 3 and heater 5.The bottom in crystallizer 7 lower taper chamber 1 is provided with the washing lower limb 12 of tubular type.Being respectively equipped with strong brine import 13 and lower strong brine import 14 on the sidewall of washing lower limb 12, the connecting line of upper strong brine import 13 and lower strong brine import 14 extends respectively into washing Tui12Nei center and connects spout vertically downward.Washing is provided with crystal salt outlet 15 between the opposite side of lower limb 12 sidewall, two import level heights.

In the running of this utility model application, major part strong brine enters circulation pipe 2 from charging aperture 1, heats, then enter crystallizer 7 through circulation pipe 6 after mixing with the saline in circulation pipe 2 in circulating pump 3 enters heater 5.Strong brine after heating occurs flash distillation, the strong brine after major part heating to be entered mother solution separator 10 fractional crystallization salt by the sidewall in crystallizer 7 bottom pyramidal chamber 1 in crystallizer 7.Part strong brine after separation is discharged by mother solution floss hole 11, and the strong brine containing crystal salt enters circulation pipe 2.Small part strong brine is entered by the upper strong brine import 13 and lower strong brine import 14 washing lower limb 12, and the strong brine after small part heating is entered washing lower limb 12 by the bottom in crystallizer 7 bottom pyramidal chamber 1, and crystal salt is discharged by crystal salt floss hole 15.Additional steam is entered the heating chamber of heater 5 by air inlet 16, and the condensed fluid after heat exchange is discharged by floss hole 17.Steam in crystallizer 7, after two grades of demisters 18, is discharged by the outlet 20 of conical cavity 2 19 sidewall at crystallizer 7 top.

Most strong brine heats (owing to the flow of the crystallization saline in circulation pipe is more than 150 times of the strong brine flow entered, thus less to the components influence of crystallization saline) with entering in heater 5 after circulation crystallization saline mixes in circulation pipe.Strong brine after heating is overheated liquid, enters and flash distillation occurs in crystallizer 7.Overheated strong brine discharges herein, and the vapour transmission liquid level of formation discharges to crystallizer 7 top, and steam, during rising, forms bubble, to NaCl, Na of being formed in saline₂SO₄Clean, make to be attached to the impurity that crystal salt shows, such as Organic substance etc., be redissolved in saline.And the saline after evaporating flows downwardly together with crystallization saline.Due to the evaporation of moisture, form NaCl, Na close to saturated strong brine₂SO₄Crystalline solid.Salt crystal grain is along with the flowing of hot salt brine and action of gravity, and constantly collision is combined into bigger crystal grain, forms haptophore, and with the flow motion of saline to tank skin direction outside washing lower limb 12.Owing to the density of crystal grain is greater than the density of saline, crystal grain moves downward, and constantly " growing up ", drops to wash near the upper strong brine import 13 of lower limb 12.

Small part strong brine is also referred to as eluriated halogen and is divided two place of entry entrance crystallizers 7 to wash lower limb 12.The pipeline that upper strong brine import 13 connects extends to wash lower limb 12 cavity center and connect spout vertically downward, forms cone current and sprays into, makes crystal salt aqueous mixtures be sufficiently mixed washing with the strong brine of entrance, due to NaCl and Na in water inlet₂SO₄Concentration is closer to saturated concentration, and the concentration of other impurity reaches far away saturated, hence with water inlet to NaCl and Na preliminarily formed₂SO₄Wash, NaCl and Na₂SO₄The crystalline solid formed can be kept, and other impurity being attached to crystalline solid surface can dissolve again, so that NaCl and Na₂SO₄Form the purest crystal.Lower strong brine import 13 connecting line extends to wash lower limb 12 cavity center and connection spout vertically downward forms downward conical current and sprays into, grain of salt crystals is made to be suspended among the fluid of flowing, can prevent crystal salt from blocking sewage draining exit at bottom deposit, also the crystal salt of relatively fine particle can be made to move upward simultaneously, the crystal salt forming larger particle is combined with the crystal salt on top, thus can be from crystal salt outlet 15 discharge being positioned in the middle part of washing lower limb 12.

Claims

1. the strong brine Crystallization Separation device of band washing lower limb, it includes the crystallizer (7) being in turn connected to form circulation line, mother solution separator (10), circulating pump (3) and heater (5), it is characterized in that, the bottom in described crystallizer (7) lower taper chamber one (8) is provided with the washing lower limb (12) of tubular type, it is respectively equipped with strong brine import (13) and lower strong brine import (14) on the sidewall of washing lower limb (12), the connecting line of upper strong brine import (13) and lower strong brine import (14) extends respectively into washing lower limb (12) interior center and connects spout vertically downward, the opposite side of washing lower limb (12) sidewall, crystal salt outlet (15) it is provided with between two import level heights.