CN106882776B - wet-process phosphoric acid production system and wet-process phosphoric acid production method - Google Patents
wet-process phosphoric acid production system and wet-process phosphoric acid production method Download PDFInfo
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- CN106882776B CN106882776B CN201710232901.7A CN201710232901A CN106882776B CN 106882776 B CN106882776 B CN 106882776B CN 201710232901 A CN201710232901 A CN 201710232901A CN 106882776 B CN106882776 B CN 106882776B
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- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
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Abstract
The present invention relates to chemical fields, specifically, the invention discloses a kind of Wet-process Phosphoric Acid Production system and Wet-process Phosphoric Acid Production methods.The Wet-process Phosphoric Acid Production system includes mineral aggregate conveying equipment, ore pulp storage tank, the dense slot of ore pulp, ore pulp head tank, extraction tank, the dense slot of slurry, phosphoric acid defecator and the phosphoric acid holding tank that setting is sequentially communicated.By the way that the thick slurry outlet of the dense slot of slurry to be communicated in the feed inlet of thick slurry dilution trap, so that filtering cleaning equipment is not involved in the filtering of phosphoric acid stoste, only filter the dilution slurry of the dense device separation of slurry.Solve the problems, such as filter and associated conduit fouling and clogging.It by process optimization, greatly improves production efficiency, improve utilization rate of equipment and installations, the production unit consumption of product can be reduced.The Wet-process Phosphoric Acid Production method, using above-mentioned Wet-process Phosphoric Acid Production system, so that when phosphoric acid by wet process relieving haperacidity, production efficiency is high.
Description
Technical field
The present invention relates to the production technology field of phosphoric acid, in particular to a kind of Wet-process Phosphoric Acid Production system and wet
Method phosphoric acid production method.
Background technology
, when phosphoric acid by wet process relieving haperacidity produces, just there is always a skill in China using calcium monohydrogen phosphate and phosphorus ammonium as the phosphorous chemical industry of representative
Art problem annoyings entire industry.Filter and associated conduit fouling and clogging problem.
Fouling and clogging is mainly manifested in filter link in traditional phosphoric acid by wet process acid-making process；As filter cloth, filtering area,
The positions such as one scrubbing section, vacuum tube, vacuum tank.Analysis reason contains with main objectionable impurities (Fe, Al, Mg, K, Na) in rock phosphate in powder
Amount height is related, related to technic index, related to temperature difference when filtering, related to the mechanism of filter and surface smoothness.It passes
The solution of system is：Increase clearing times intensity, change filter dependency structure, takes Insulation, the stifled dirt of chemistry, adjustment
Technic index；There is alleviation phenomenon, but remission effect is bad, still there is certain degree to influence production, cause downstream product quality not
Steady production cost has certain rise, loses more than gain.Last most enterprise must replace high-quality former rock phosphate in powder or selection ore dressing is rich
Poly- phosphorus ore solves the problems, such as.By taking the steel gray mine of Yichang, the production of Hunan weathering black patch mine as an example；Their quality overall targets in addition to
P2O5Other than >=27%, other main objectionable impurities indexs all have exceeded gold standard (Fe=3.1%, Al=2.5%, Mg=
2.1%, K=0.41%, Na=0.46%).It, 16 hours when serious must be clear in addition to filter serious scale blocks in production
Reason.
Invention content
The purpose of the present invention is to provide a kind of Wet-process Phosphoric Acid Production systems, can efficiently solve phosphoric acid by wet process relieving haperacidity
When production, filter and associated conduit fouling and clogging problem.
Another object of the present invention is to provide a kind of Wet-process Phosphoric Acid Production methods, when enabling to phosphoric acid by wet process relieving haperacidity,
Production efficiency is high, and availability is high.
In order to realize that the above-mentioned purpose of the present invention, spy use following technical scheme：
A kind of Wet-process Phosphoric Acid Production system, Wet-process Phosphoric Acid Production system include that mineral aggregate conveying equipment, ore pulp storage tank, ore pulp are dense
Close slot, ore pulp head tank, extraction tank, the dense slot of slurry, phosphoric acid defecator, phosphoric acid holding tank, thick slurry dilution trap, filtering cleaning are set
The standby and dense slot of return acid.Wherein, mineral aggregate conveying equipment, ore pulp storage tank, the dense slot of ore pulp, ore pulp head tank, extraction tank, material
Dense slot, phosphoric acid defecator and phosphoric acid holding tank is starched to be sequentially communicated.And the thick slurry outlet of the dense slot of slurry is communicated in thick
Starch the feed inlet of dilution trap；The discharge port for returning to the dense slot of acid is communicated in the feed inlet of extraction tank.Return to the charging of the dense slot of acid
Mouth is communicated in the discharge port of filtering cleaning equipment.
In preferred embodiments of the present invention, filtering cleaning equipment includes filter and the dense slot of washing lotion, filter
Feed inlet is communicated in the discharge port for stating thick slurry dilution trap, and the discharge port of filter is communicated in the feed inlet of the dense slot of washing lotion.
In preferred embodiments of the present invention, the discharge port of filter be additionally provided with discharge port for being connected to filter with
Return to the first pipe of the feed inlet of the dense slot of acid.
In preferred embodiments of the present invention, the discharge port of the dense slot of washing lotion is additionally provided with for being connected to the dense slot of washing lotion
The second pipe of discharge port and the feed inlet of thick slurry dilution trap.
In preferred embodiments of the present invention, the dense slot of washing lotion washes area, the area that washes cloth, cooling including a Xi Qu, two Xi Qu, three
Tower and vacuum pump, a Xi Qu, two Xi Qu, three wash area, the area that washes cloth, cooling tower and vacuum pump and are sequentially communicated, the areas Qie Yixi
Feed inlet is communicated in the discharge port of filter.
In preferred embodiments of the present invention, the discharge port of cooling tower is also communicated in the feed inlet of female sink, female sink
Discharge port is communicated in the feed inlet in the area that washes cloth and the feed inlet of cooling tower.
In preferred embodiments of the present invention, two, which wash the discharge port in area and one, washes between the feed inlet in area and is additionally provided with third
Pipeline；Three, which wash the discharge port in area and two, washes between the feed inlet in area and is additionally provided with the 4th pipeline；The discharge port in area and three that washes cloth is washed
The 5th pipeline is additionally provided between the feed inlet in area.
In preferred embodiments of the present invention, heat exchanger is both provided on first pipe, third pipeline and the 4th pipeline.
In preferred embodiments of the present invention, mineral aggregate conveying equipment includes muck feed bin, rock feeder, ball mill and vibration
Sieve, muck feed bin, rock feeder, ball mill and vibrating screen are sequentially communicated, and the discharge port of vibrating screen is communicated in ore pulp storage tank
Feed inlet.
A kind of Wet-process Phosphoric Acid Production method, including above-mentioned Wet-process Phosphoric Acid Production system.
The beneficial effects of the invention are as follows：
A kind of Wet-process Phosphoric Acid Production system provided by the invention includes mineral aggregate conveying equipment, the ore pulp storage that setting is sequentially communicated
The dense slot of slot, ore pulp, ore pulp head tank, extraction tank, the dense slot of slurry, phosphoric acid defecator and phosphoric acid holding tank.By that will expect
The thick slurry outlet for starching dense slot is communicated in the feed inlet of thick slurry dilution trap.So that filtering cleaning equipment is not involved in phosphoric acid stoste mistake
The dilution slurry of the dense device separation of slurry is only filtered in filter, to effectively solve the life of phosphoric acid by wet process relieving haperacidity in the prior art
During production, the problem of filter and associated conduit fouling and clogging.And this Wet-process Phosphoric Acid Production system has the following advantages that：
One, solve the problems, such as filter fouling and clogging, improve production efficiency, improve utilization rate of equipment and installations, reduce production unit consumption at
This；Two, the spoilage for reducing filter system equipment extends the service life of equipment, has saved maintenance cost, extends
Cleaning cycle reduces clearing times, alleviates cleaning labor intensity；Three, with the solution of filter system fouling and clogging problem
Certainly, the substandard products mineral resources of middle-low grade can be directly used for producing, and can be the price difference cost that enterprise saves the comparable high-quality mineral resources of buying,
The dressing cost of rich poly- raw ore.Mineral resources scarcity is solved for enterprise simultaneously, difficult problem is purchased, is provided for the survival and development of enterprise
Advantage.
Wet-process Phosphoric Acid Production method provided by the invention, using above-mentioned Wet-process Phosphoric Acid Production system, so that wet method
When phosphoric acid relieving haperacidity, production efficiency is high.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the equipment flowsheet schematic diagram for the Wet-process Phosphoric Acid Production system that first embodiment of the invention provides；
Fig. 2 is the process flow diagram for the Wet-process Phosphoric Acid Production method that second embodiment of the invention provides.
Icon：100- Wet-process Phosphoric Acid Production systems；101- thick slurry outlets；102- precipitates discharge gate；110- mineral aggregates convey
Equipment；111- muck feed bins；112- rock feeders；113- ball mills；114- vibrating screens；115- ore pulp storage tanks；116- ore pulps are dense
Slot；117- ore pulp head tanks；118- extraction tanks；The dense slot of 119- slurries；120- phosphoric acid defecators；130- phosphoric acid holding tanks；
140- thick slurry dilution traps；150- filters cleaning equipment；151- filters；152- first pipes；153- second pipes；154- thirds
Pipeline；The 4th pipelines of 155-；The 5th pipelines of 156-；The dense slot of 160- washing lotions；161- mono- washes area；162- bis- washes area；163- tri- is washed
Area；164- washes cloth area；165- cooling towers；166- vacuum pumps；170- returns to the dense slot of acid；Mother's 180- sink；190- heat exchangers.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiments of the present invention, this field is common
The every other embodiment that technical staff is obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
In the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put, be merely for convenience of description of the present invention and simplification of the description, without
It is instruction or implies that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore not
It can be interpreted as limitation of the present invention.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is instruction or implies relative importance.
In addition, the terms such as term "horizontal", "vertical", " pendency " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to indicate the structure if "horizontal" refers to only that its direction is more horizontal with respect to for "vertical"
It has to fully horizontally, but can be slightly tilted.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, can also be electrical connection；It can be directly connected, it can also be indirect by intermediary
It is connected, can is the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
First embodiment
Fig. 1 is please referred to, the present embodiment provides a kind of Wet-process Phosphoric Acid Production systems 100.The Wet-process Phosphoric Acid Production system 100 is wrapped
It is dense to include the dense slot 116 of mineral aggregate conveying equipment 110, ore pulp storage tank 115, ore pulp, ore pulp head tank 117, extraction tank 118, slurry
Slot 119, phosphoric acid defecator 120, phosphoric acid holding tank 130, thick slurry dilution trap 140, filtering cleaning equipment 150 and return acid are dense
Slot 170.
Specifically, the discharge port of mineral aggregate conveying equipment 110 is communicated in the feed inlet of ore pulp storage tank 115, ore pulp storage tank 115
Discharge port is communicated in the feed inlet of the dense slot of ore pulp 116, and the discharge port of the dense slot of ore pulp 116 is communicated in ore pulp head tank 117
Feed inlet, the discharge port of ore pulp head tank 117 are communicated in the feed inlet of extraction tank 118, and the discharge port of extraction tank 118 is communicated in material
Starch the feed inlet of dense slot 119, the discharge port of the dense slot of slurry 119 is communicated in the feed inlet of phosphoric acid defecator 120, phosphoric acid clarification
The discharge port of slot 120 is communicated in the feed inlet of phosphoric acid holding tank 130.Further, the dense slot of slurry 119 is additionally provided with thick slurry row
Outlet 101, thick slurry outlet 101 is communicated in the feed inlet of thick slurry dilution trap 140, and the discharge port of thick slurry dilution trap 140 is communicated in
The feed inlet of cleaning equipment 150 is filtered, the discharge port of filtering cleaning equipment 150 is communicated in the feed inlet for returning to sour dense slot 170,
The discharge port for returning to sour dense slot 170 is communicated in the feed inlet of extraction tank 118.Pass through this set so that filtering cleaning equipment
150 are not involved in the filtering of phosphoric acid stoste, only filter the dilution slurry of the dense device separation of slurry.If filter 151 is directly connected to
In extraction tank 118, then being crushed by mineral aggregate, the stoste after ball milling and the choosing of vibrating screen 114, filter will be directly entered
151 are filtered, this be easy for block filter 151 and with 151 relevant pipeline of filter, to influence entire wet method phosphorus
The production efficiency of acid production process.In the present embodiment, filter 151 is not directly communicates with extraction tank 118, so that former
Liquid does not have to be directly entered filter 151, to the blocking of filter 151 would not occur, greatly improves production efficiency yet
And the utilization rate of raw material.
It should be noted that on the pipeline of the feed inlet of the dense slot of discharge port and ore pulp 116 of connection ore pulp storage tank 115
It is provided with delivery pump.So as to ensure ore pulp being smoothly transported to the feed inlet of the dense slot of ore pulp 116.In the present embodiment
In, it is preferable that liquid-solid ratio≤0.7 of the thick slurry of separation in the dense slot 116 of ore pulp：1, so as to be further ensured that phosphoric acid by wet process
The trouble-free operation of production system 100 effectively solves the problems, such as that filter 151 blocks, greatlys improve efficiency and the utilization of production
Rate.It is further preferred that the volume of the dense slot of ore pulp 116 will be matched with production capacity, acid solution can either be distinguished；Also it can arrange thick
Slurry is smooth, is stablized with thick slurry disengaging, is balanced as standard.It is further preferred that the dense slot 116 of ore pulp carries out isothermal holding, to
The heat dissipation of Wet-process Phosphoric Acid Production system 100 can be efficiently reduced.
Please continue to refer to Fig. 1, further, the top discharge gate of the dense slot of above-mentioned ore pulp 116 is additionally provided with for connecting
Connect the delivery pipe of ore pulp dense slot 116 and the feed inlet of ball mill 113.When the ore pulp entered in the dense slot of ore pulp 116 is not inconsistent
Standardization, when can not be delivered in ore pulp head tank 117 from the discharge port of dense 116 bottom of slot of ore pulp, then by ore pulp from mine
The discharge gate directly return for starching the top of dense slot 116 is delivered to ball mill 113, carries out secondary processing.And then it can ensure
The subsequent process of Wet-process Phosphoric Acid Production system 100 is smoothed out.
Specifically, it is provided with valve at the top discharge gate of the dense slot of ore pulp 116.It should be understood that the choosing of above-mentioned valve
It selects and does not limit, ball valve, air pressure valve can be selected or select according to the actual needs suitable valve.
Further, it is additionally provided with precipitation discharge gate 102 in the bottom of phosphoric acid defecator 120.Precipitation discharge gate 102 passes through
Pipeline is communicated in the feed inlet for returning to sour dense slot 170.After slurry is clarified in phosphoric acid defecator 120, slot top
Clarified solution continues to be fed forward to the feed inlet of phosphoric acid holding tank 130 by pipeline.And under the precipitation of 120 bottom of phosphoric acid defecator
The slurry come can be returned to by pipeline returns to sour dense slot 170.
Specifically, it is provided with valve at the precipitation discharge gate 102 of bottom for returning to sour dense slot 170.It should be understood that above-mentioned
The selection of valve do not limit, ball valve, air pressure valve can be selected or select according to the actual needs suitable valve.
It should be understood that the setting of the position of the precipitation discharge gate 102 of above-mentioned phosphoric acid defecator 120 does not limit.Also may be used
To be set to the other positions of phosphoric acid defecator 120, it is not limited to be set to the bottom of phosphoric acid defecator 120.
It should be noted that in the discharge port for being connected to above-mentioned phosphoric acid defecator 120 and the charging for returning to sour dense slot 170
It is also equipped with delivery pump on the pipeline of mouth.So as to ensure precipitate slurry being smoothly transported the dense slot of return time acid 170
Feed inlet.After slurries after precipitation are transmitted back to the dense slot of return acid 170 again, the slurries of precipitation, which pass through, returns to the dense slot of acid
The discharge gate of 170 slot bottoms can be transmitted back to extraction tank 118 again, to realize recycling for raw material, further improve wet
The production efficiency and utilization rate of method phosphoric acid production system 100.
From the above, the discharge port that sour dense slot 170 is additionally provided with top clarified solution is returned, sour dense slot 170 is being returned
It is interior, the precipitation of slurries can also be realized, to which the discharge port on diluter limpid slurries from the top for returning to sour dense slot 170 is straight
It connects and is delivered to phosphoric acid defecator 120.Similarly, connection herein returns to the discharge port and phosphoric acid defecator 120 of sour dense slot 170
It is also equipped with valve on the pipeline of feed inlet.Further, connection is additionally provided in the discharge outlet for returning to sour dense slot 170 to return
Return the pipeline of acid dense slot 170 and ore pulp storage tank 115.To reach when the requirement for returning to the slurry in sour dense slot 170
When the requirement standard being fed directly in phosphoric acid defecator 120, then slurry is directly transported into back ore pulp storage tank 115.
Please continue to refer to Fig. 1, further, mineral aggregate conveying equipment 110 includes muck feed bin 111, rock feeder 112, ball milling
Machine 113 and vibrating screen 114.Wherein, muck feed bin 111, rock feeder 112, ball mill 113 and vibrating screen 114 are sequentially communicated,
And the discharge port of vibrating screen 114 is communicated in the feed inlet of ore pulp storage tank 115.
When mineral aggregate is after broken, ball milling and screening, ore pulp storage tank 115 is entered, to subsequent technological process
Be smoothed out and provide guarantee.It should be noted that above-mentioned muck feed bin 111, rock feeder 112, ball mill 113 and shaking
The selection of dynamic sieve 114 does not limit, can select suitable equipment according to specific actual needs.
Please continue to refer to Fig. 1, further, in the present embodiment, the dense slot 119 of slurry and thick slurry dilution trap 140 are arranged
Between extraction tank 118 and filtering cleaning equipment 150.Flocculant etc. can be selected to be added inside the dense slot of slurry 119 to material
Slurry carries out dense processing.Further, the feed inlet of the dense slot of slurry 119 is communicated in extraction tank 118, the dense slot of slurry 119
Discharge port is communicated in phosphoric acid defecator 120.Further, it is additionally provided with thick slurry outlet in the bottom of the dense slot of slurry 119
101, and thick slurry outlet 101 is communicated in thick slurry dilution trap 140.In this embodiment, it is preferred that the control dense slot of slurry
Thick slurry liquid-solid ratio≤0.7 of 119 discharges:1.So as to be further ensured that the trouble-free operation of Wet-process Phosphoric Acid Production system 100, have
Effect solves the problems, such as that filter 151 blocks, and greatlys improve the utilization rate of production.It is further preferred that the dense slot of slurry 119
Isothermal holding is done, so as to reduce its heat dissipation.It is further preferred that in the dense slot of slurry 119, the temperature control of the thick slurry of discharge
System is at >=85 DEG C.It is further preferred that the volume of the dense slot of slurry 119 is producing for 10 minutes for Wet-process Phosphoric Acid Production system 100
The volume of ability.
It should be understood that the thick slurry outlet 101 of the dense slot of above-mentioned slurry 119, the dense slot of slurry 119 can also be set to
Other positions are not limited to be set to the bottom of the dense slot of slurry 119.
When magma passes through extraction tank 118, the solution such as addition sulfuric acid extract magma in extraction tank 118, pass through
The magma of extraction continues to be fed forward, and is delivered to the dense slot of slurry 119.Magma by extraction in the dense slot of slurry 119, into
Row precipitation separation, wherein the clear solution on top continues to be fed forward, and is delivered to phosphoric acid defecator 120, in phosphoric acid defecator
By after clarifying treatment, continuing to be fed forward, being delivered to phosphoric acid holding tank 130 in 120.The production of phosphoric acid is completed, i.e.,
Next process can be entered.
At this point, the thick slurries that precipitation generates in the dense slot 119 of slurry, do not pass through pipeline to phosphoric acid defecator
120.Thick slurry outlet 101 in the bottom of the dense slot of slurry 119 is provided with valve, at this point it is possible to valve is opened, slurry is dense
Thick slurries in close slot 119 are discharged from above-mentioned thick slurry outlet 101, and pass through pipeline to thick slurry dilution trap
140 feed inlet.
It should be understood that the selection of above-mentioned valve does not limit, ball valve, air pressure valve can be selected or according to actual need
Select suitable valve.
Further, the discharge port of thick slurry dilution trap 140 is communicated in the feed inlet of filtering cleaning equipment 150.When from slurry
The thick slurry that 119 bottom of dense slot excludes after dilution, is passing through pipeline to mistake in thick slurry dilution trap 140
Filter the feed inlet of cleaning equipment 150.It designs, when slurry enters filtering cleaning equipment 150, has been obtained in this way
Multiple processing, slurry at this time be diluted, and the slurry after this dilution is delivered to filtering cleaning equipment
150, it can be effectively prevented from the problem of filter 151 blocks, greatly improve production efficiency so that the utilization rate of raw material obtains
To the great cost reduction for improving, and then producing, great economic benefit is achieved.
Please continue to refer to Fig. 1, further, filtering cleaning equipment 150 includes filter 151 and the dense slot of washing lotion 160.
Wherein, the feed inlet of filter 151 is communicated in the discharge port of thick slurry dilution trap 140, and the discharge port of filter 151 is communicated in washing lotion
The feed inlet of dense slot 160.This makes it possible to the blockings for being effectively prevented from filter 151.
It should be noted that on the pipeline of the feed inlet of the discharge port and filter 151 of above-mentioned thick slurry dilution trap 140
It is provided with delivery pump, so as to ensure to pass through diluted slurry smooth delivery of power to filter 151.
The discharge port of filter 151 is additionally provided with the discharge port for being connected to filter 151 and returns to sour dense slot 170
The first pipe 152 of feed inlet.When by treated the slurries of filter 151, when can reach technological requirement, slurries directly from
First pipe 152, which is delivered to, returns to sour dense slot 170.Further, it is additionally provided with delivery pump in first pipe 152.So as to
It is enough to ensure extremely to return to the slurry smooth delivery of power Jing Guo filtration treatment into sour dense slot 170.
Further, the dense slot 160 of washing lotion, which including one washes area 161, two and washes area 162, three, washes the area 163, area 164 that washes cloth, cold
But tower 165 and vacuum pump 166.Wherein, one wash area 161, two wash area 162, three wash area 163, the area 164 that washes cloth, cooling tower 165 with
And vacuum pump 166 is sequentially communicated.The feed inlet in the areas Qie Yixi 161 is communicated in the discharge port of filter 151.The dense slot of washing lotion 160
Discharge port be additionally provided with the second pipe for being connected to the discharge port of the dense slot of washing lotion 160 and the feed inlet of thick slurry dilution trap 140
Road 153.Specifically, second pipe 153 is set between the discharge port that one washes area 161 and the feed inlet of thick slurry dilution trap 140.When
161 cleaned slurries of area are washed by one, when can reach technological requirement, slurries are directly delivered to from second pipe 153
Thick slurry dilution trap 140.Further, it is also equipped with delivery pump on second pipe 153.So as to ensure that area will be washed by one
161 cleaned slurry smooth delivery of power are to thick slurry dilution trap 140.
Further, it two washes the discharge port in area 162 and one and washes between the feed inlet in area 161 and be additionally provided with third pipeline 154；
When washing area 162 treated slurries by two and reach technological requirement, it is back to one by the conveying of third pipeline 154 and washes area 161,
And it is delivered to by first pipe 152 and returns to sour dense slot 170.Likewise, in order to ensure the smooth outflow of slurries, in third
Delivery pump and valve are also equipped on pipeline 154.
Three, which wash the discharge port in area 163 and two, washes between the feed inlet in area 162 and is additionally provided with the 4th pipeline 155；When by three
It when washing area 163 treated slurries and reaching technological requirement, is back to two by the conveying of the 4th pipeline 155 and washes area 162, then pass through the
The conveying of three pipelines 154 is back to one and washes area 161, and is delivered to by first pipe 152 and returns to sour dense slot 170.Likewise,
In order to ensure the smooth outflow of slurries, delivery pump and valve are also equipped on the 4th pipeline 155.
The discharge port in area 164 and three that washes cloth is washed between the feed inlet in area 163 and is additionally provided with the 5th pipeline 156.When by washing
Treated in cloth area 164 when slurries reach technological requirement, and being back to three by the conveying of the 5th pipeline 156 washes area 163, then passes through the
The conveying of four pipelines 155 is back to two and washes area 162, then is back to one by the conveying of third pipeline 154 and washes area 161, and passes through the
One pipeline 152, which is delivered to, returns to sour dense slot 170.Likewise, in order to ensure the smooth outflow of slurries, on the 5th pipeline 156
It is also equipped with delivery pump and valve.
From the above, the setting of cooling tower 165 and vacuum pump 166 be in order to ensure the dense slot of washing lotion 160 it is smooth into
Row.Specifically the operation principle of cooling tower 165 and vacuum pump 166 is well-known to those skilled in the art, no longer superfluous herein
It states.
Please continue to refer to Fig. 1, further, the discharge port of cooling tower 165 is also communicated in the feed inlet of female sink 180, female
The discharge port of sink 180 is communicated in the feed inlet in the area 164 that washes cloth and the feed inlet of cooling tower 165.It is dense that female water returns to washing lotion
It is back to the dense slot 170 of return acid by first pipe 152 after slot 160, is then return to ore pulp storage tank 115.In this way
Setting, is changed to filtered fluid ore grinding by female water of ore grinding, realizes and recycle.Specifically, in this embodiment, it is preferred that,
By filtered fluid through 115 preneutralization of ore pulp storage tank, make its pH value >=3.0.When pH value >=3.0, it is circulated in entire Wet-process Phosphoric Acid Production
The slurries of system 100 are weaker to the corrosion of equipment.So as to further protect the service life of equipment, and then reduces and be produced into
This, increases economic efficiency.
Further, it is both provided with heat exchanger 190 on first pipe 152, third pipeline 154 and the 4th pipeline 155.It is logical
Setting heat exchanger 190 is crossed, the processing of heat exchange three times is realized, cleaning solution gradually walks heating.In this embodiment, it is preferred that being used for
The cleaning solution for diluting thick slurry is controlled at >=65 DEG C；When dilution enters the filtering of filter 151, temperature is controlled at >=75 DEG C, most
It is low to cannot be below 70 DEG C.So as to effectively improve the filtering temperature difference of filter 151, slows down Na, K in former phosphoric acid liquid and be saturated
The variation of degree reduces the speed of Na, K precipitation.So as to further increase the efficiency and utilization rate of production.
By above-mentioned setting, all relieving haperacidity water in 100 inside of Wet-process Phosphoric Acid Production system is balanced so that whole
Relieving haperacidity water can focus on filter 151.By the dense slot 160 of washing lotion to thick slurry dilution trap 140, realize dense to slurry
The dilution of close slot 119.Efficiently solve the blockage problem of filter 151.In entire Wet-process Phosphoric Acid Production system 100, fill
Divide other waste heats such as waste heat, phosphoric acid waste heat, product drying waste heat and the steam that extraction reaction is utilized, relieving haperacidity is changed with water
Heat has saved energy consumption, further improves the conversion ratio and production efficiency of production.
Second embodiment
The present embodiment provides a kind of Wet-process Phosphoric Acid Production methods.Utilize the Wet-process Phosphoric Acid Production system in first embodiment
100 carry out the preparation of phosphoric acid.
Specific process flow chart please refers to Fig. 2, and mineral aggregate first enters ore pulp storage tank after crushing ball milling screening
115.Then pass through the dense slot 116 of ore pulp, ore pulp head tank 117 and be delivered to extraction tank 118, by the dense slot 119 of slurry, one
It distinguishes liquid and is delivered to phosphoric acid holding tank 130 through peroxophosphoric acid defecator 120；Remaining thick slurry is delivered to by thick slurry dilution trap 140
It is delivered to the dense slot 170 of return acid after the filtering cleaning of filtering cleaning equipment 150, recycles again.Entire production method,
Filtering cleaning equipment 150 is not involved in the filtering of phosphoric acid stoste, the dilution slurry of the dense device separation of slurry is only filtered, between realizing
Filter is taken over, is directly changed to not by filter 151 by filter 151 by original ortho acid, and 151 filterings of filter are low dense
The rephosphorization acid of degree, the method to solve filtration system blocking.But also above-mentioned wet method phosphorus while solving this problem
The production efficiency of acid production 100 improves, utilization rate of equipment and installations improves, and the production unit consumption of product reduces.
Solves the problems, such as sulphur dioxide of phosphor chemical industry long felt-phosphoric acid by wet process life by above-mentioned Wet-process Phosphoric Acid Production method
Relieving haperacidity filter fouling and clogging is produced, solves the problems, such as (Na+K)≤0.3% in former rock phosphate in powder can be represented after fouling and clogging miscellaneous
Matter expands to (Na+K)≤1.0%, more even higher.Time quality can be directly used by above-mentioned Wet-process Phosphoric Acid Production method
Former rock phosphate in powder.Demand pressure of the market to high-quality former rock phosphate in powder can be reduced.The existing former phosphorus ore of country can more effectively be utilized
Resource.The ore dressing richness that is directly used without of secondary quality original rock phosphate in powder is gathered, that is, is avoided environmental pollution, in turn avoided energy resources
Waste.It is provided for enterprise and more uses mine option, extend buying market.Compared with high-quality former rock phosphate in powder, that is, meet work
Skill requirement, and can be that enterprise saves huge production cost.
In conclusion the mineral aggregate conveying that a kind of Wet-process Phosphoric Acid Production system provided by the invention, which includes setting, to be sequentially communicated is set
Standby, ore pulp storage tank, the dense slot of ore pulp, ore pulp head tank, extraction tank, the dense slot of slurry, phosphoric acid defecator and phosphoric acid holding tank.
By the feed inlet that the thick slurry outlet of the dense slot of slurry is communicated in thick slurry dilution trap.So that filtering cleaning equipment is not involved in phosphorus
Sour stoste filtering only filters the dilution slurry of the dense device separation of slurry, to effectively solve wet method phosphorus in the prior art
In sour relieving haperacidity production process, the problem of filter and associated conduit fouling and clogging.By specific process optimization, greatly improve
Production efficiency improves utilization rate of equipment and installations, can reduce the production unit consumption of product.
Wet-process Phosphoric Acid Production method provided by the invention, using above-mentioned Wet-process Phosphoric Acid Production system, so that wet method
When phosphoric acid relieving haperacidity, production efficiency is high.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of Wet-process Phosphoric Acid Production system, which is characterized in that the Wet-process Phosphoric Acid Production system includes mineral aggregate conveying equipment, mine
Starch storage tank, the dense slot of ore pulp, ore pulp head tank, extraction tank, the dense slot of slurry, phosphoric acid defecator, phosphoric acid holding tank, thick slurry dilution
Slot, filtering cleaning equipment and the dense slot of return acid；The mineral aggregate conveying equipment, the ore pulp storage tank, the dense slot of the ore pulp,
The ore pulp head tank, the extraction tank, the dense slot of the slurry, the phosphoric acid defecator and the phosphoric acid holding tank are successively
Connection；And the thick slurry outlet of the dense slot of slurry is communicated in the feed inlet of the thick slurry dilution trap；The return acid is dense
The discharge port of slot is communicated in the feed inlet of the extraction tank；The feed inlet for returning to the dense slot of acid is communicated in the filtering cleaning
The discharge port of equipment.
2. Wet-process Phosphoric Acid Production system according to claim 1, which is characterized in that the filtering cleaning equipment includes filtering
Machine and the dense slot of washing lotion, the feed inlet of the filter are communicated in the discharge port of the thick slurry dilution trap, the filter
Discharge port be communicated in the feed inlet of the dense slot of the washing lotion.
3. Wet-process Phosphoric Acid Production system according to claim 2, which is characterized in that the discharge port of the filter is also set up
It is useful for being connected to the first pipe of the discharge port and the feed inlet for returning to the dense slot of acid of the filter.
4. Wet-process Phosphoric Acid Production system according to claim 2, which is characterized in that the discharge port of the dense slot of washing lotion is also
It is provided with the second pipe of the feed inlet of the discharge port and the thick slurry dilution trap for being connected to the dense slot of the washing lotion.
5. Wet-process Phosphoric Acid Production system according to claim 3, which is characterized in that the dense slot of washing lotion is washed including one
Area, two Xi Qu, three wash area, the area that washes cloth, cooling tower and vacuum pump, and described one washes area, described two washes area, described three washes area, institute
It states the area that washes cloth, the cooling tower and the vacuum pump to be sequentially communicated, and described one feed inlet for washing area is communicated in filter
Discharge port.
6. Wet-process Phosphoric Acid Production system according to claim 5, which is characterized in that the discharge port of the cooling tower is also connected to
In the feed inlet of female sink, the discharge port of mother's sink be communicated in the area that washes cloth feed inlet and the cooling tower into
Material mouth.
7. Wet-process Phosphoric Acid Production system according to claim 5, which is characterized in that described two wash the discharge port in area with it is described
One washes between the feed inlet in area and is additionally provided with third pipeline；Described three, which wash the discharge port in area and described two, washes between the feed inlet in area
It is additionally provided with the 4th pipeline；The discharge port in the area that washes cloth and described three is washed between the feed inlet in area and is additionally provided with the 5th pipeline.
8. Wet-process Phosphoric Acid Production system according to claim 7, which is characterized in that the first pipe, the third pipe
It is both provided with heat exchanger on road and the 4th pipeline.
9. Wet-process Phosphoric Acid Production system according to claim 1, which is characterized in that the mineral aggregate conveying equipment includes muck
Feed bin, rock feeder, ball mill and vibrating screen, the muck feed bin, the rock feeder, the ball mill and the vibrating screen
It is sequentially communicated, and the discharge port of the vibrating screen is communicated in the feed inlet of the ore pulp storage tank.
10. a kind of Wet-process Phosphoric Acid Production method, which is characterized in that including such as claim 1-9 any one of them phosphoric acid by wet process
Production system.
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| GB2352715B (en) * | 1999-07-30 | 2002-01-09 | Membrane Extraction Tech Ltd | Recovery of aromatic amines dissolved in aqueous fluids |
| CN102992290A (en) * | 2012-12-18 | 2013-03-27 | 瓮福（集团）有限责任公司 | Production device and operation method for reducing solid content of phosphoric acid |
| CN203079693U (en) * | 2013-01-23 | 2013-07-24 | 山东明瑞化工集团有限公司 | Reaction device for preparing phosphoric acid |
| CN203866038U (en) * | 2014-05-07 | 2014-10-08 | 四川蓥峰实业有限公司 | Phosphoric acid production device system |
| CN106395775A (en) * | 2016-08-31 | 2017-02-15 | 郝付勇 | Method for filtering phosphoric acid extraction slurry |
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