CN209065460U - A kind of sub-prime salt separator - Google Patents

Abstract

It include Na the utility model relates to a kind of sub-prime salt separator₂SO₄Collector unit, separative unit and NaCl collector unit.Na₂SO₄Collector unit passes through the first centrifuge and Na by saltcake hot melt tank₂SO₄Collecting box connects and composes；Separative unit is sequentially connected in series and is constituted by the first mechanical steam recompression system, sedimentation centrifuge, nitre freezer unit processed and second centrifuge；NaCl collector unit is connected by third centrifuge with NaCl collecting box by the second mechanical steam recompression system to be constituted；Second centrifuge is connect with the second mechanical steam recompression system by pipeline；The sedimentation centrifuge is connected by pipeline with the saltcake hot melt tank.Above-mentioned sub-prime salt device can apply to highly concentrated salt Sewage treatment NaCl and Na₂SO₄, and the NaCl and Na recycled₂SO₄It is up to state standards, meets the environmentally friendly trend of " zero-emission ".

Description

A kind of sub-prime salt separator

Technical field

The utility model relates to energy-saving and emission-reduction field more particularly to a kind of sub-prime salt separators.

Background technique

Under the overall background of current energy shortages, the concern of sustainable development and Green Development by the whole world.In recent years, with The fast development of the industries such as petrochemical industry, electric power, metallurgy, coal chemical industry, the reverse osmosis concentrated water generated in industrial processes, industry it is dirty Water, circulating sewage and some processes draining etc. the more complex sewage quantity containing ingredient increase year by year, sewage discharge be one urgently The ecological problem of solution.It is well known that not only can be to fragile ecological environment structure containing a large amount of, sewage direct emission in sewage At threat and the huge waste of resource.In order to effectively solve pollution problem and efficent use of resources of the sewage to ecology, to dirt Water is comprehensively utilized undoubtedly most direct effective approach.

If a kind of high strong brine sub-prime of Treated sewage reusing of Publication No. 205386347U crystallizes complexes, by water inlet homogeneous Pond, water inlet preheater, to halogen preheater, one effect crystallizer, two effect crystallizers, triple effect crystallizer, quadruple effect crystallizer, thickener, Centrifuge, drier, packing machine, an effect condenser, two effect condensers, triple effect condenser, quadruple effect condenser, condensation pond, mother Liquid pool is formed by connecting through pipeline.Na can be recycled in the utility model₂SO₄、NaCl、NaN0₃Equal Nacls, and can also be more than application system Heat, it is adaptable to the fluctuation of water quality.Above-mentioned apparatus recycles Na dependent on repeatedly crystallization and condensation process₂SO₄, NaCl, process stream The complicated and requirement to system of journey is high, the temperature adjustment of overall process repeatedly, and energy consumption is high.

The utility model be integrated with MVR be concentrated by evaporation, be cooling, the multinomial technology such as hot melt and separation, efficiently, low energy consumption, low The Na of cost and high quality₂SO₄、NaCl。

Utility model content

For the deficiencies of the prior art, the utility model provides a kind of sub-prime salt separator.

A kind of sub-prime salt separator, including Na₂SO₄Collector unit, separative unit and NaCl collector unit, wherein

Na₂SO₄Collector unit includes at least saltcake hot melt tank, the first centrifuge and Na₂SO₄Collecting box；The saltcake hot melt Slot passes through first centrifuge and the Na₂SO₄Collecting box connection.

Separative unit includes at least the first mechanical steam recompression system, sedimentation centrifuge, nitre freezer unit processed and second Centrifuge；The first mechanical steam recompression system, sedimentation centrifuge, the nitre freezer unit processed and second centrifuge It is sequentially connected in series.

NaCl collector unit includes at least the second mechanical steam recompression system, third centrifuge and NaCl collecting box； The second mechanical steam recompression system is connected by the third centrifuge with the NaCl collecting box.

Second centrifuge is connect with the second mechanical steam recompression system by pipeline；The sedimentation centrifugation Machine is connected by pipeline with the saltcake hot melt tank.

According to a kind of preferred embodiment, the separative unit further includes BaCl₂Pond, the 4th centrifuge and BaSO₄It collects Case；Second centrifuge passes through BaCl₂The connection of tetra- centrifuge of Chi Yu；It is described to pass through BaCl₂Pond passes through the 4th centrifuge It is connect with the second mechanical steam recompression system；4th centrifuge and the BaSO₄Collecting box is connected.

According to a kind of preferred embodiment, the separative unit further includes that nanofiltration divides salt device, and the nanofiltration divides salt to fill It sets and is connected by the first mechanical steam recompression system with the sedimentation-type centrifuge；The nanofiltration divides salt device also logical Cross the BaCl₂Pond is connected with the 4th centrifuge.

According to a kind of preferred embodiment, mechanical steam presses system to include at least steam circulation centrifuge and evaporation again Device；First steam circulation centrifuge is connected by the first evaporator with sedimentation centrifuge；The nanofiltration divides salt device by first Evaporator is connected with sedimentation centrifuge；Second steam circulation centrifuge is connected by the second evaporator with the third centrifuge； Second evaporator is connected by the third centrifuge with the first evaporator.

According to a kind of preferred embodiment, the separative unit further includes nitre forecooler processed, and the sedimentation centrifuge is logical The nitre forecooler processed is crossed to be connected with the nitre freezer unit processed.

According to a kind of preferred embodiment, the nitre freezer unit processed is heated by second centrifuge and the saltcake Slot is connected.

According to a kind of preferred embodiment, second centrifuge also passes through pipeline and first mechanical steam again Compressibility is connected；The third centrifuge is connected also by pipeline with the first mechanical steam recompression system.

According to a kind of preferred embodiment, the pipeline that the saltcake hot melt tank is connect with first centrifuge is heat preservation Pipe；The connecting pipe of the nitre forecooler processed and the nitre freezer unit processed is insulating tube；The nitre freezer unit processed and described second The connecting pipe of centrifuge is insulating tube.

According to a kind of preferred embodiment, first centrifuge is freezed by the nitre freezer unit processed and the nitre processed Device is connected.

According to a kind of preferred embodiment, the Na₂SO₄Collection further includes drying oven, and first centrifuge passes through institute State drying oven and the Na₂SO₄Collecting box is connected.

The advantageous effects of the utility model:

The utility model proposes a kind of sub-prime salt separator, have the advantage that compared with prior art and 1. adopt High-salt wastewater is further concentrated with MVR concentration technique, which uses steam as heat source, and energy consumption is lower and efficiency improves； 2. carrying out initial gross separation to brine waste using decanter type centrifugation, Na is realized₂SO₄Crystal is partially separated from waste liquid, reduces system The workload of nitre freezer unit；3. height is further concentrated containing NaCl solution using MVR concentration technique, it is ensured that NaCl nucleus Formation and crystal grain it is uniform；4. the utility model additionally provides liquid reflux scheme, guarantee Na to greatest extent₂SO₄, NaCl return Yield.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of sub-prime salt separator described in the utility model embodiment；

Fig. 2 is one kind that mechanical steam presses system again in a kind of sub-prime salt separator described in the utility model embodiment Preferred structure schematic diagram；With

Fig. 3 be one kind of saltcake hot solution recycling in a kind of sub-prime salt separator described in the utility model embodiment preferably Structural schematic diagram.

Reference signs list

1: nanofiltration divides 11: the second mechanical steam of salt device to press system again

2: the first mechanical steams press 12: the four centrifuge of system again

3: sedimentation centrifuge 13:NaCl collecting box

4: saltcake hot melt tank 14:Na₂SO₄Collecting box

5: the first centrifuge 15:BaSO₄Collecting box

6: 21: the first evaporator of nitre forecooler processed

7: 22: the first steam circulation centrifuge of nitre freezer unit processed

8: the second centrifuge, 111: the second evaporator

9:BaCl₂112: the first steam circulation centrifuge of pond

10: the four centrifuges 141: drying oven

Specific embodiment

A kind of preferred embodiment of soft brush treatment device of the utility model is described in detail with reference to the accompanying drawing.Figure In, arrow only indicates the flow direction of water flow or sludge, and the position of effect does not represent true pipeline nozzle position.

In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy Fixed orientation construction and operation, therefore be not considered as limiting the invention.

In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it "lower" may include that the first and second features directly contact, and also may include that the first and second features are not direct contacts but lead to Cross the other characterisation contact between them.Moreover, fisrt feature includes above the second feature " above ", " above " and " above " One feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First is special Sign is directly below and diagonally below the second feature including fisrt feature under the second feature " below ", " below " and " below ", or only Indicate that first feature horizontal height is less than second feature.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention, More than, unless otherwise specifically defined.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood as the case may be Concrete meaning in the present invention.

Embodiment 1

As shown in Fig. 1, a kind of sub-prime salt separator provided in this embodiment, including Na₂SO₄Collector unit, separation are single Member and NaCl collector unit.

Wherein, Na₂SO₄Collector unit includes saltcake hot melt tank 4, the first centrifuge 5 and Na₂SO₄Collecting box 14.Saltcake heat Molten slot 4 passes through the first centrifuge 5 and Na₂SO₄Collecting box 14 connects.Separative unit includes the first mechanical steam recompression system 2, sedimentation centrifuge 3, nitre freezer unit 7 processed and the second centrifuge 8.First mechanical steam recompression system 2, sedimentation centrifuge 3, Nitre freezer unit 7 processed and the second centrifuge 8 are sequentially connected in series.NaCl collector unit includes the second mechanical steam recompression system 11, third centrifuge 12 and NaCl collecting box 13.Second mechanical steam recompression system 11 by third centrifuge 12 with NaCl collecting box 13 is connected.Second centrifuge 8 is connect with the second mechanical steam recompression system 11 by pipeline.Sedimentation centrifugation Machine 3 is connected by pipeline with saltcake hot melt tank 4.

First mechanical steam recompression system 2 is discharged into sedimentation after high-salt wastewater is further concentrated using high-grade steam Formula centrifuge 3.On the one hand, after the isolated saltcake crystal of sedimentation centrifuge 3 enters saltcake hot melt tank 4, using being built in saltcake The steam pipework of heat melting device heats saltcake crystal, the Na in saltcake crystal₂SO₄It is dissolved in the crystallization water of itself, and is formed Saturated solution, part of anhydrous sodium sulfate are precipitated due to that can not dissolve.Saturated solution and anhydrous sodium sulfate mixed crystal It is discharged into the first centrifuge 5, the centrifugal action through the first centrifuge 5 realizes separation.Anhydrous slufuric acid sodium crystal is collected into Na₂SO₄ Collecting box.On the other hand, enter saltcake freezer unit 7 through the liquid without saltcake crystal that sedimentation centrifuge 3 separates.According to Na₂SO₄ Solubility is influenced by temperature, it is preferred that nitre freezer unit 7 processed uses shell-and-tube heat exchanger, the jelly second two that heat transferring medium is 15 DEG C Alcohol medium, there is Na in pipe heat exchanger₂SO₄It is precipitated.Containing Na₂SO₄The medium of crystal and NaCl are discharged into the second centrifuge 8, realize Further realize Na₂SO₄With the separation of NaCl.Enter the second mechanical steam recompression system 11 containing NaCl, further realizes dense Contracting after NaCl crystal is largely precipitated at this time, is discharged into third centrifuge 12 and realizes separation of solid and liquid, NaCl crystal is collected into NaCl Collecting box 13.

Preferably, sub-prime salt separator further includes BaCl₂Pond 9 and the 4th centrifuge 10；Second centrifuge 8 passes through BaCl₂ Pond 9 is connect with the 4th centrifuge 10；Pass through BaCl₂Pond 9 passes through the 4th centrifuge 10 and the second mechanical steam recompression system Connection；4th centrifuge 10 and BaSO₄Collecting box 15 is connected.In BaCl₂Following chemical reaction occurs for Chi Zhong:

BaCl₂+Na₂SO₄→BaSO₄↓+2NaCl

BaCl₂Pond 9 is further to make NaCl from SO₄ ^2—Pollution, and obtain the NaCl of higher quality.

Centrifuge is divided into perforated wall centrifuge and sedimentation-type centrifuge according to principle difference.Perforated wall centrifuge passes through high speed Liquid phase acceleration in solid-liquid mixed liquor is thrown away rotary drum by the centrifugal force that the centrifugal reel of operating generates, and solid phase is stayed in rotary drum It is interior, reach separation solid and liquid.And the cardinal principle of sedimentation-type centrifuge be generated by rotor high speed rotation it is powerful Centrifugal force accelerates the sinking speed of different specific weight ingredient (solid phase or liquid phase) in mixed liquor, sedimentation coefficients different in sample with The substance of buoyant density separates.Preferably, the first centrifuge 5, the second centrifuge 8, third centrifuge 12 and the 4th centrifuge 10 are all made of perforated wall centrifuge.Sedimentation centrifuge 3 uses horizontal screw unloading formula sedimentation-type centrifuge.

Preferably, sub-prime salt separator further includes that nanofiltration divides salt device 1, and nanofiltration divides salt device 1 mechanical by first Vapor recompression system 2 is connected with sedimentation-type centrifuge 3；Nanofiltration divides salt device 1 also to pass through BaCl₂Tetra- centrifuge of Chi Yu, 10 phase Even.Nanofiltration divides salt device 1 to carry out initial gross separation to crude brine, nanofiltration divide salt device using nanofiltration membrane have to divalent and multivalence from Son has higher removal performance, and then lower to the removal efficiency of monovalention and small molecule；Divide salt device in nanofiltration, Cl-is penetrated Nanofiltration membrane and SO₄ ²- cannot penetrate and be trapped.

Mechanical steam recompression system is the secondary steam and its energy generated using vapo(u)rization system itself, will be low-grade Steam be promoted to high-grade steam source through the mechanical work of compressor, high-grade steam is further dense as crude brine Contracting heat source further increases the TDS in crude brine.Preferably, the first mechanical steam recompression system 2 includes the first steam Circular centrifugal machine 21 and the first evaporator 22.First steam circulation centrifuge 22 passes through the first evaporator 21 and sedimentation centrifuge 3 It is connected.Nanofiltration divides salt device 1 to be connected by the first evaporator 21 with sedimentation centrifuge 3.Preferably, the second mechanical steam is pressed again Compression system 11 includes the second steam circulation centrifuge 111 and the first evaporator 112.Second steam circulation centrifuge 112 passes through the Two evaporators 111 are connected with third centrifuge 12.Second evaporator 111 passes through third centrifuge 12 and 21 phase of the first evaporator Even.

Preferably, nanofiltration, which divides in salt device 1, flow to BaCl through piping rich in Cl-side solution₂Pond, and it is rich in SO₄ ^2— Solution flow to the first mechanical steam and press the first evaporator 21 in system 2 again.

Preferably, sedimentation centrifuge 3 is connected by nitre forecooler 6 processed with nitre freezer unit 7 processed.Sedimentation centrifuge 3 is isolated The concentrate come passes through the preparatory cooling of nitre forecooler 6 processed, using nitre freezer unit 7 processed, the Na of production₂SO₄With better crystalline substance Grain.

Preferably, nitre freezer unit 7 processed is connected by the second centrifuge 8 with saltcake hot melt tank 4.Second centrifuge 8 is isolated Na₂SO₄·10H₂O crystal, Na₂SO₄·10H₂O crystal cannot function as Na₂SO₄Directly by Na₂SO₄Collecting box 14 directly stores, and needs Further the crystallization water to be precipitated, therefore by Na₂SO₄·10H₂O is discharged into saltcake hot melt tank 4, with the Na to gain freedom₂SO₄Crystal.

Preferably, the second centrifuge 5 also passes through the first evaporator in pipeline and the first mechanical steam recompression system 2 21 are connected.The saltcake hot solution that second centrifuge 5 is isolated is continued to be back in the first mechanical steam recompression system 2 First evaporator 21, continues to be recycled as stoste.

Preferably, third centrifuge 12 be connected also by pipeline with the first mechanical steam recompression system 2 in first Evaporator 21.The desalination dope that third centrifuge 12 is isolated is continued to be back in the first mechanical steam recompression system 2 The first evaporator 21, continue to be recycled as stoste.

Preferably, the pipeline that saltcake hot melt tank 4 is connect with the first centrifuge 5 is insulating tube；Nitre forecooler 6 processed and nitre processed are cold The connecting pipe for freezing device 7 is insulating tube；The connecting pipe of nitre freezer unit 7 processed and the second centrifuge 8 is insulating tube.Na₂SO₄To ring Border temperature is sensitive, to prevent Na₂SO₄Mesometamorphism is transmitted in pipeline, it is ad hoc to be equipped with insulation pipe structure.

Preferably, the first centrifuge 5 passes through drying oven 141 and Na₂SO₄Collecting box 14 is connected.Drying oven 141 continues to guarantee Na₂SO₄It is stored in anhydrous state.

Above embodiments obtain Na₂SO₄Chemical index >=98.5%, appearance are white crystals particle, and product quality meets GB/T 6009-2014 is without industrial two class Grade A standard of aqueous sodium persulfate.NaCl chemical index >=98.5%, appearance are white knot Brilliant particle, product quality meet GB/T 5462-2003 refining industrial salt level-one quality standard, and Na₂SO₄With the rate of recovery of NaCl Up to 92%.

Embodiment 2

As shown in figure 3, different from embodiment 1 is: the second centrifuge 5 not with the first mechanical steam recompression system The first evaporator 21 in 2 is connected, but the second centrifuge 5 is connected by nitre forecooler 6 processed with nitre freezer unit 7 processed.Remaining is each Part-structure is same as Example 1.

Saltcake hot melt liquid itself is used as a kind of fluid of highly enriched state, by the isolated saltcake hot solution of the second centrifuge 5 It is back to nitre forecooler 6 processed by pipeline, machine is back to by pipeline compared to by the second centrifuge 5 isolated saltcake hot melt liquid For tool formula recompression system, while reducing the workload of mechanical recompression system, saltcake hot melt is also reduced Cl is mixed into liquid^—Probability.

It should be noted that above-mentioned specific embodiment is exemplary, those skilled in the art can be in the utility model Various solutions are found out under the inspiration of disclosure, and these solutions also belong to the open scope of the utility model simultaneously It falls within the protection scope of the utility model.It will be understood by those skilled in the art that the utility model specification and its attached drawing It is illustrative and not constitutes limitations on claims.The protection scope of the utility model is by claim and its equivalent It limits.

Claims (10)

1. a kind of sub-prime salt separator, including Na₂SO₄Collector unit, separative unit and NaCl collector unit, which is characterized in that

The Na₂SO₄Collector unit includes at least saltcake hot melt tank (4), the first centrifuge (5) and Na₂SO₄Collecting box (14)；Institute It states saltcake hot melt tank (4) and passes through first centrifuge (5) and the Na₂SO₄Collecting box (14) connection；

The separative unit includes at least the first mechanical steam recompression system (2), sedimentation centrifuge (3), nitre freezer unit processed (7) and the second centrifuge (8)；The first mechanical steam recompression system (2), sedimentation centrifuge (3), the nitre freezing processed Device (7) and second centrifuge (8) are sequentially connected in series；

The NaCl collector unit includes at least the second mechanical steam recompression system (11), third centrifuge (12) and NaCl Collecting box (13)；The second mechanical steam recompression system (11) is received by the third centrifuge (12) and the NaCl Header (13) is connected；

Second centrifuge (8) is connect with the second mechanical steam recompression system (11) by pipeline；The sedimentation Centrifuge (3) is connected by pipeline with the saltcake hot melt tank (4).

2. a kind of sub-prime salt separator as described in claim 1, which is characterized in that the separative unit further includes BaCl₂Pond (9), the 4th centrifuge (10) and BaSO₄Collecting box (15)；Second centrifuge (8) passes through BaCl₂Pond (9) and the 4th centrifugation Machine (10) connection；The BaCl₂Pond (9) is connected by the 4th centrifuge (10) and the second mechanical steam recompression system It connects；4th centrifuge (10) and the BaSO₄Collecting box (15) is connected.

3. a kind of sub-prime salt separator as claimed in claim 2, which is characterized in that the separative unit further includes nanofiltration point Salt device (1), the nanofiltration divide salt device (1) by the first mechanical steam recompression system (2) and it is described settle from Scheming (3) is connected；The nanofiltration divides salt device (1) also by the BaCl₂Pond (9) is connected with the 4th centrifuge (10).

4. a kind of sub-prime salt separator as claimed in claim 3, which is characterized in that it includes extremely that mechanical steam presses system again A few steam circulation centrifuge and at least one evaporator；First steam circulation centrifuge (22) passes through the first evaporator (21) It is connected with sedimentation centrifuge (3)；The nanofiltration divides salt device (1) to be connected by the first evaporator (21) with sedimentation centrifuge (3)； Second steam circulation centrifuge (112) is connected by the second evaporator (111) with the third centrifuge (12)；Described second steams Hair device (111) is connected by the third centrifuge (12) with the first evaporator (21).

5. a kind of sub-prime salt separator as claimed in claim 4, which is characterized in that the separative unit further includes that nitre processed is pre- Cooler (6), the sedimentation centrifuge (3) are connected by the nitre forecooler (6) processed with the nitre freezer unit (7) processed.

6. a kind of sub-prime salt separator as claimed in claim 5, which is characterized in that the nitre freezer unit (7) processed passes through institute The second centrifuge (8) is stated to be connected with the saltcake hot melt tank (4).

7. a kind of sub-prime salt separator as claimed in claim 6, which is characterized in that first centrifuge (5) also passes through Pipeline is connected with the first mechanical steam recompression system (2)；The third centrifuge (12) also by pipeline with it is described First mechanical steam recompression system (2) is connected.

8. a kind of sub-prime salt separator as described in one of claim 5-7, which is characterized in that the saltcake hot melt tank (4) The pipeline connecting with first centrifuge (5) is insulating tube；The nitre forecooler (6) processed and the nitre freezer unit (7) processed Connecting pipe is insulating tube；The connecting pipe of the nitre freezer unit (7) processed and second centrifuge (8) is insulating tube.

9. a kind of sub-prime salt separator as claimed in claim 8, which is characterized in that first centrifuge (5) passes through institute Nitre forecooler (6) processed is stated to be connected with the nitre freezer unit (7) processed.

10. a kind of sub-prime salt separator as claimed in claim 8, which is characterized in that the Na₂SO₄Collection further includes drying Furnace (141), first centrifuge (5) pass through the drying oven (141) and the Na₂SO₄Collecting box (14) is connected.