CN208667101U - A kind of comprehensive utilization device of waste phosphoric acid - Google Patents

Abstract

The utility model discloses a kind of comprehensive utilization devices of waste phosphoric acid, including waste phosphoric acid cleaning module, ferric phosphate synthesis module and ferric phosphate washing-drying module, waste phosphoric acid cleaning module includes scavenging solution storage tank, first filter press, purification reaction slot, waste phosphoric acid storage tank and neutralizer storage tank, ferric phosphate synthesis module includes ferric trichloride storage tank and synthetic reaction slot, ferric phosphate washing-drying module includes the second filter press, agitator treating slot, centrifuge, rake type dryer, washing water storage tank and ferric phosphate synthesis mother liquid storage tank, the two sides of the bottom side of neutralizer storage tank is symmetrically arranged with water outlet one and water outlet two, water outlet two-way piping and pump are connect with the synthetic reaction slot of ferric phosphate synthesis module, stirring structure one is equipped in the middle part of the inside of synthetic reaction slot, the top of synthetic reaction slot is equipped with inlet one, inlet two and inlet three, And neutralizer storage tank is connect with inlet one, the center bottom of synthetic reaction slot is equipped with water outlet three, and water outlet threeway piping and pump are connect with the inlet of the second filter press of ferric phosphate washing-drying module.

Description

A kind of comprehensive utilization device of waste phosphoric acid

Technical field

The utility model relates to chemical equipment technical fields, it particularly relates to a kind of comprehensive utilization device of waste phosphoric acid.

Background technique

Most of chemical polishing of aluminium and aluminium alloy is carried out using phosphoric acid based sols, and the most commonly used is phosphoric acid, nitric acid, sulfuric acid are mixed Close liquid.A large amount of spent acid is often generated in the sector production process, and there is very strong corrosivity, furthermore also contain in spent acid The harmful chemical substance such as heavy metal ion belongs to the HW34 class of " National Hazard waste register ".

Currently, mainly using lime neutralisation for such spent acid, a large amount of waste residue is generated, and be easy to cause secondary dirt Dye.Although there are also the thinkings that related patents and document report cross comprehensive utilization, but it is mostly used for production calcium monohydrogen phosphate class Product, added value of product is extremely low, causes the great wasting of resources.

Utility model content

The technical assignment of the utility model is against the above deficiency, to provide a kind of comprehensive utilization device of waste phosphoric acid, to solve Certainly problem.

The technical solution of the utility model is achieved in that

A kind of comprehensive utilization device of waste phosphoric acid, including waste phosphoric acid cleaning module, ferric phosphate synthesis module and ferric phosphate are washed - drying module is washed, the waste phosphoric acid cleaning module includes scavenging solution storage tank, the first filter press, purification reaction slot, waste phosphoric acid storage tank With neutralizer storage tank, the ferric phosphate synthesis module includes ferric trichloride storage tank and synthetic reaction slot, the ferric phosphate washing-baking Dry module includes the second filter press, agitator treating slot, centrifuge, rake type dryer, washing water storage tank and ferric phosphate synthesis mother liquid Storage tank, the two sides of the bottom side of the neutralizer storage tank are symmetrically arranged with water outlet one and water outlet two, and the water outlet two passes through pipe Road and pump are connect with the synthetic reaction slot of the ferric phosphate synthesis module, and stirring knot is equipped in the middle part of the inside of the synthetic reaction slot Structure one, the top of the synthetic reaction slot are equipped with inlet one, inlet two and inlet three, and the neutralizer storage tank and institute State the connection of inlet one, the center bottom of the synthetic reaction slot is equipped with water outlet three, and the water outlet threeway piping and Pump is connect with the inlet of the second filter press of the ferric phosphate washing-drying module.

Further, stirring structure two, the top of the purification reaction slot are equipped in the middle part of the inside of the purification reaction slot Two sides are equipped with inlet four and inlet five, and the inlet four-way piping and pump are connect with the waste phosphoric acid storage tank, and The bottom side side of the waste phosphoric acid storage tank is equipped with water outlet four, the water outlet four-way piping and pump and the purification reaction Slot connection, the inlet five are connect by pipeline and pump with the water outlet one of the neutralizer storage tank, and the purification is anti- The center bottom of slot is answered to be equipped with water outlet five, and the water outlet five passes through the feed inlet of pipeline and pump and first filter press The water outlet six of connection, first filter press is connect by pipeline and pump with the scavenging solution storage tank.

Further, the inlet two-way piping of the synthetic reaction slot and pump and the ferric trichloride storage tank Inlet connection, the inlet threeway piping and pump of the synthetic reaction slot are connect with the scavenging solution storage tank.

Further, the filtrate effluent mouth of second filter press is stored up by pipeline and pump with the ferric phosphate synthesis mother liquid Slot connection, the bottom end of second filter press are equipped with dump mouth two, and the dump mouth two and agitator treating groove top end one The feed inlet of side connects, and another side in top of the agitator treating slot is equipped with running water inlet, the agitator treating slot Center bottom is equipped with water outlet seven, and the water outlet seven is connect by pipeline and pump with the centrifuge, the centrifuge Bottom end is equipped with discharge port one, and the discharge port one is connect with the rake type dryer, and external a side of the centrifuge is set There is filtrate outlet, and the filtrate outlet is connect by pipeline and pump with the washing water storage tank.

Further, the bottom end of first filter press is equipped with dump mouth one, and the lower section of the dump mouth one is equipped with dump Reserve tank.

The utility model has the beneficial effects that using kinds of processes knots such as indissoluble salt precipitation method, metathesis reaction, crystal form synthesis Close, phosphor resource in waste phosphoric acid can be made to obtain efficient synthetical recovery by the processing of the system, in scavenging solution phosphorous recovery it is high Up to 98% or more, while the phosphoric acid iron product of output high added value can be molten with output ammonium chloride if neutralizer selects ammonium hydroxide Liquid can be used as fertilizer, which does not generate secondary pollution while realizing resource reclaim, be more in line with use.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this A little attached drawings obtain other attached drawings.

Fig. 1 is the comprehensive utilization device structural schematic diagram one according to the waste phosphoric acid of the utility model embodiment；

Fig. 2 is the comprehensive utilization device structural schematic diagram two according to the waste phosphoric acid of the utility model embodiment；

Fig. 3 is the waste phosphoric acid cleaning module structural schematic diagram according to the utility model embodiment；

Fig. 4 is the ferric phosphate synthesis module structural schematic diagram according to the utility model embodiment；

Fig. 5 is the ferric phosphate washing-drying modular structure schematic diagram according to the utility model embodiment.

In figure:

1, waste phosphoric acid cleaning module；2, ferric phosphate synthesis module；3, ferric phosphate washing-drying module；4, scavenging solution storage tank； 5, the first filter press；6, purification reaction slot；7, waste phosphoric acid storage tank；8, neutralizer storage tank；9, ferric trichloride storage tank；10, synthesis is anti- Answer slot；11, the second filter press；12, agitator treating slot；13, centrifuge；14, rake type dryer；15, washing water storage tank；16, phosphorus Sour iron synthesis mother liquid storage tank；17, water outlet one；18, water outlet two；19, stirring structure one；20, inlet one；21, inlet Two；22, inlet three；23, water outlet three；24, it pumps；25, stirring structure two；26, inlet four；27, inlet five；28, go out The mouth of a river four；29, water outlet five；30, water outlet six；31, dump mouth two；32, running water inlet；33, water outlet seven；34, discharging Mouth one；35, filtrate outlet；36, dump mouth one；37, dump reserve tank.

Specific embodiment

In the description of the present invention, it should be understood that term " center ", " transverse direction ", "upper", "lower", " left side ", The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on the figure Orientation or positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the dress of indication or suggestion meaning It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model Limitation.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.In the description of the present invention, unless otherwise indicated, the meaning of " multiple " It is two or more.In addition, term " includes " and its any deformation, it is intended that cover and non-exclusive include.

The utility model is described in further detail in the following with reference to the drawings and specific embodiments.

As shown in Figs. 1-5, it is purified according to the comprehensive utilization device of the waste phosphoric acid of the utility model embodiment, including waste phosphoric acid Module 1, ferric phosphate synthesis module 2 and ferric phosphate washing-drying module 3, the waste phosphoric acid cleaning module 1 include scavenging solution storage tank 4, the first filter press 5, purification reaction slot 6, waste phosphoric acid storage tank 7 and neutralizer storage tank 8, the ferric phosphate synthesis module 2 include three Iron chloride storage tank 9 and synthetic reaction slot 10, the ferric phosphate washing-drying module 3 include the second filter press 11, agitator treating slot 12, centrifuge 13, rake type dryer 14, washing water storage tank 15 and ferric phosphate synthesis mother liquid storage tank 16, the neutralizer storage tank 8 Two sides of the bottom side is symmetrically arranged with water outlet 1 and water outlet 2 18, and the water outlet 2 18 passes through pipeline and pump 24 and the phosphorus The synthetic reaction slot 10 of sour iron synthesis module 2 connects, and stirring structure 1, institute are equipped in the middle part of the inside of the synthetic reaction slot 10 State synthetic reaction slot 10 top be equipped with inlet 1, inlet 2 21 and inlet 3 22, and the neutralizer storage tank 8 with The inlet 1 connects, and the center bottom of the synthetic reaction slot 10 is equipped with water outlet 3 23, and the water outlet 3 23 It is connect by pipeline and pump 24 with the inlet of the second filter press 11 of the ferric phosphate washing-drying module 3.

Specific workflow: waste phosphoric acid cleaning module 1 mainly utilizes neutralization reaction, by the pH for adjusting waste phosphoric acid solution Value, so that the foreign metal in waste phosphoric acid, such as: the removal of Al precipitating so that solution is purified, is conducive to subsequent preparation Gao Pin The phosphoric acid iron product of matter, the chemical reaction mainly occurred are as follows:

H3PO4+NH3H2O=NH4H2PO4+H2O

Al3++3NH3H2O=3NH4++Al (OH) 3 ↓

Al3++PO43-=AlPO4 ↓

Meanwhile ferric phosphate synthesis module 2 using purified solution and ferric trichloride and neutralizes these three objects of agent solution Material reaction synthesis ferric phosphate, is mainly utilized the principles of chemistry such as neutralization reaction and metathesis reaction, the reaction mainly occurred are as follows:

FeCl3+NH4H2PO4+2NH3H2O=FePO4 ↓+3NH4Cl+2H2O

Ferric phosphate washing-drying module 3 is mainly that the phosphoric acid iron precipitate for obtaining synthetic reaction and synthesis mother liquid carry out Filters pressing separation, the ferric phosphate that last filters pressing obtains wash and drying is prepared into sintetics.

In one embodiment, stirring structure 2 25, the purification reaction are equipped in the middle part of the inside of the purification reaction slot 6 The top two sides of slot 6 be equipped with inlet 4 26 and inlet 5 27, the inlet 4 26 by pipeline and pump 24 with it is described Waste phosphoric acid storage tank 7 connects, and the bottom side side of the waste phosphoric acid storage tank 7 is equipped with water outlet 4 28, and the water outlet 4 28 is logical Piping and pump 24 are connect with the purification reaction slot 6, and the inlet 5 27 is stored up by pipeline and pump 24 with the neutralizer The water outlet 1 of slot 8 connects, and the center bottom of the purification reaction slot 6 is equipped with water outlet 5 29, and the water outlet 5 29 are connect by pipeline and pump 24 with the feed inlet of first filter press 5, and the water outlet 6 30 of first filter press 5 is logical Piping and pump 24 are connect with the scavenging solution storage tank 4；Waste phosphoric acid stoste by 7 side bottom of waste phosphoric acid storage tank water outlet 4 28 The inlets 4 26 for being transported to purification reaction slot 6 by pump 24, neutralizer ammonium hydroxide by neutralizer storage tank 8 side bottom water outlet Mouth 1 is transported to the inlets 5 27 on 6 top of purification reaction slot by pump 24, and is carried out adequately by stirring structure 2 25 Stirring, the material after reaction transport material to the feed inlet of the first filter press 5 by pump 24, and material is pressed through the first filter press 5 After filter, filtrate is delivered to by scavenging solution storage tank 4 by pump 24.

In one embodiment, the inlet 2 21 of the synthetic reaction slot 10 passes through pipeline and pump 24 and described three The inlet of iron chloride storage tank 9 connects, the inlet 3 22 of the synthetic reaction slot 10 by pipeline and pump 24 with it is described Scavenging solution storage tank 4 connects；Liquor ferri trichloridi by ferric trichloride storage tank 9 by pump 24 be delivered to the top of synthetic reaction slot 10 into In liquid mouth 2 21, meanwhile, neutralizer ammonium hydroxide is delivered to the inlet on 10 top of synthetic reaction slot by neutralizer storage tank 8 by pump 24 One 20, scavenging solution is delivered to the inlet 3 22 on 10 top of synthetic reaction slot by scavenging solution storage tank 4 by pump 24, and three kinds of feed liquids exist It is stirred in synthetic reaction slot 10 by stirring structure 1 and feed liquid is adequately mixed and synthesize anti- It answers, finally obtains ferric phosphate.

In another embodiment, the filtrate effluent mouth of second filter press 11 passes through pipeline and pump 24 and the phosphoric acid Iron synthesis mother liquid storage tank 16 connects, and the bottom end of second filter press 11 is equipped with dump mouth 2 31, and the dump mouth 2 31 with The feed inlet of described 12 top a side of agitator treating slot connects, and another side in top of the agitator treating slot 12 is equipped with originally Water inlet 32, the center bottom of the agitator treating slot 12 are equipped with water outlet 7 33, and the water outlet 7 33 by pipeline and Pump 24 is connect with the centrifuge 13, and the bottom end of the centrifuge 13 is equipped with discharge port 1, and the discharge port 1 and institute The connection of rake type dryer 14 is stated, external a side of the centrifuge 13 is equipped with filtrate outlet 35, and the filtrate outlet 35 are connect by pipeline and pump 24 with the washing water storage tank 15；Slurry after synthesis ferric phosphate is delivered to the second filters pressing by pump 24 Filters pressing is carried out in machine 11, filtrate is delivered to ferric phosphate synthesis mother liquid storage tank 16 by pump 24 by the water outlet of the second filter press 11, Filter cake is discharged into agitator treating slot 12 by 11 lower part dump mouth of the second filter press, and is beaten in agitator treating slot 12 Washing, the slurry after washing, which is delivered in centrifuge 13 by the water outlet seven of 12 bottom of agitator treating slot by pump 24, to be centrifuged Filtering, filtrate after centrifugal filtration are delivered to washing water storage tank 15 by pump 24, centrifuged ferric trichloride product from from The automatic discharging mouth of 13 lower part of scheming is discharged into rake type dryer 14 material that is dried, after drying from rake type dryer 14 lower part discharge ports are drawn off, and are carried out product and are packaged operation.

In another embodiment, dump mouth 1, the dump mouth one are equipped with by the bottom end of first filter press 5 36 lower section is equipped with dump reserve tank 37, and dump reserve tank can be collected the filter cake in one filter press of bottom, thus more Health.

In conclusion by means of the above-mentioned technical proposal of the utility model, it is anti-by using indissoluble salt precipitation method, double decomposition Answer, crystal form synthesis etc. kinds of processes combine, phosphor resource in waste phosphoric acid can be made to obtain efficiently integrating back by the processing of the system Receive, in scavenging solution phosphorous recovery be up to 98% or more, while the phosphoric acid iron product of output high added value, if neutralizer selects ammonia If water, fertilizer can be can be used as with output ammonium chloride solution.The equipment does not generate secondary dirt while realizing resource reclaim Dye.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection scope within.

Claims (5)

1. a kind of comprehensive utilization device of waste phosphoric acid, which is characterized in that synthesize mould including waste phosphoric acid cleaning module (1), ferric phosphate Block (2) and ferric phosphate washing-drying module (3), the waste phosphoric acid cleaning module (1) include scavenging solution storage tank (4), the first filters pressing Machine (5), purification reaction slot (6), waste phosphoric acid storage tank (7) and neutralizer storage tank (8), the ferric phosphate synthesis module (2) include three Iron chloride storage tank (9) and synthetic reaction slot (10), the ferric phosphate washing-drying module (3) include the second filter press (11), stir Mix sink (12), centrifuge (13), rake type dryer (14), washing water storage tank (15) and ferric phosphate synthesis mother liquid storage tank (16), the two sides of the bottom side of the neutralizer storage tank (8) is symmetrically arranged with water outlet one (17) and water outlet two (18), the water outlet Two (18) of mouth are connect by pipeline and pump (24) with the synthetic reaction slot (10) of the ferric phosphate synthesis module (2), the synthesis Stirring structure one (19) is equipped in the middle part of the inside of reactive tank (10), the top of the synthetic reaction slot (10) is equipped with inlet one (20), inlet two (21) and inlet three (22), and the neutralizer storage tank (8) is connect with the inlet one (20), institute The center bottom for stating synthetic reaction slot (10) is equipped with water outlet three (23), and the water outlet three (23) passes through pipeline and pump (24) It is connect with the inlet of the second filter press (11) of the ferric phosphate washing-drying module (3).

2. a kind of comprehensive utilization device of waste phosphoric acid according to claim 1, which is characterized in that the purification reaction slot (6) stirring structure two (25) is equipped in the middle part of inside, the top two sides of the purification reaction slot (6) are equipped with inlet four (26) With inlet five (27), the inlet four (26) is connect by pipeline and pump (24) with the waste phosphoric acid storage tank (7), and described The bottom side side of waste phosphoric acid storage tank (7) be equipped with water outlet four (28), the water outlet four (28) by pipeline and pump (24) and Purification reaction slot (6) connection, the institute that the inlet five (27) passes through pipeline and pump (24) and the neutralizer storage tank (8) Water outlet one (17) connection is stated, the center bottom of the purification reaction slot (6) is equipped with water outlet five (29), and the water outlet five (29) it is connect by pipeline and pump (24) with the feed inlet of first filter press (5), the water outlet of first filter press (5) Six (30) are connect by pipeline and pump (24) with the scavenging solution storage tank (4).

3. a kind of comprehensive utilization device of waste phosphoric acid according to claim 1, which is characterized in that the synthetic reaction slot (10) the inlet two (21) is connect by pipeline and pump (24) with the inlet of the ferric trichloride storage tank (9), described The inlet three (22) of synthetic reaction slot (10) is connect by pipeline and pump (24) with the scavenging solution storage tank (4).

4. a kind of comprehensive utilization device of waste phosphoric acid according to claim 1, which is characterized in that second filter press (11) filtrate effluent mouth is connect by pipeline and pump (24) with the ferric phosphate synthesis mother liquid storage tank (16), second filters pressing The bottom end of machine (11) is equipped with dump mouth two (31), and the dump mouth two (31) and agitator treating slot (12) top a side Feed inlet connection, another side in top of the agitator treating slot (12) is equipped with running water inlet (32), the agitator treating The center bottom of slot (12) is equipped with water outlet seven (33), and the water outlet seven (33) passes through pipeline and pump (24) and the centrifugation Machine (13) connection, the bottom end of the centrifuge (13) are equipped with discharge port one (34), and the discharge port one (34) and the rake External a side of drier (14) connection, the centrifuge (13) is equipped with filtrate outlet (35), and the filtrate outlet (35) it is connect by pipeline and pump (24) with the washing water storage tank (15).

5. a kind of comprehensive utilization device of waste phosphoric acid according to claim 1, which is characterized in that first filter press (5) bottom end is equipped with dump mouth one (36), and the lower section of the dump mouth one (36) is equipped with dump reserve tank (37).