CN205170393U - A device for phosphoric acid by wet process preparation potassium dihydrogen phosphate - Google Patents
A device for phosphoric acid by wet process preparation potassium dihydrogen phosphate Download PDFInfo
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- CN205170393U CN205170393U CN201520819437.8U CN201520819437U CN205170393U CN 205170393 U CN205170393 U CN 205170393U CN 201520819437 U CN201520819437 U CN 201520819437U CN 205170393 U CN205170393 U CN 205170393U
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- phosphoric acid
- storage tank
- outlet
- potassium hydroxide
- primary phosphate
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Abstract
The utility model discloses a device for phosphoric acid by wet process preparation potassium dihydrogen phosphate, supply acid pump, tubular reactor, ammonia neutralizing tank in, and ground paste centrifugal separator in, and ground paste storage tank, potassium hydroxide reaction, evaporative concentration ware, cooling crystallizer, tail gas washing tower, atmosphere condenser and circulating water storage tank including rare phosphoric acid storage tank of interconnect, the rare phosphoric acid of washing, the gas exports at the gas exports at ammonia neutralizing tank top, the gas exports at potassium hydroxide reaction top, evaporative concentration ware top and cooling crystallizer's gas exports are all continuous with the air inlet of tail gas washing tower, and the liquid phase import of tail gas washing tower supplies the acid delivery side of pump to link to each other through pipeline and the rare phosphoric acid of washing, and the gas exports of tail gas washing tower and the gaseous phase import at potassium hydroxide 1 middle part link to each other, and potassium hydroxide 1's lower liquid is managed and is linked to each other with the circulating water storage tank. The utility model discloses a filter equipment and the high -efficient combination of tubular reactor can realize the edulcoration of phosphoric acid by wet process in succession, reduce environmental pollution, guarantee product quality.
Description
Technical field
The utility model belongs to technical field of chemical, specifically relates to a kind of device preparing potassium primary phosphate for phosphoric acid by wet process.
Background technology
Potassium primary phosphate is a kind of important chemical, has a wide range of applications in industries such as agricultural, industry, food, medicine.Existingly to prepare in the processing method of potassium primary phosphate, although neutralisation technical process is simple, technology maturation, facility investment is few, stable and reliable product quality, and with thermal phosphoric acid and potash for raw material, expensive, production cost is too high; Direct method cost is lower, and equipment corrosion is serious, also quality product can be caused poor because of side reaction; Double decomposition reduces with cost compared with neutralisation, but the low conversion rate of potassium, and equipment corrosion is serious, and non-standard equipment is many, unstable product quality; Ion exchange method can produce the potassium primary phosphate of high-quality, but energy consumption is too high, and one-time investment is comparatively large, and actually operating has a lot of trouble; Adopt electrolytic process technique simple, electrolysis completes comparatively thorough, but as a kind of large-scale Industrial products production method, has more difficult point technically.Potassium primary phosphate is prepared by phosphoric acid by wet process, first by utilizing the foreign ion in phosphoric acid by wet process and ammonia gas react can produce complicated throw out, by filtering the foreign ion in rear removing phosphoric acid by wet process, obtain comparatively pure phosphor ammonium slurry, phosphor ammonium slurry and potassium hydroxide is utilized to react, the potassium primary phosphate of preparation high-quality; Therefore, how to develop a kind of in contrast in phosphoric acid by wet process prepare the device of potassium primary phosphate, to reduce production cost, ensureing quality product, is technical problem urgently to be resolved hurrily at present.
Utility model content
For solving the problem, the utility model provides a kind of device for wet-process phosphorous acid to produce industrial-grade phosphorous acid potassium dihydrogen, produce potassium primary phosphate by this device and greatly can reduce production cost, reduce environmental pollution, make potassium dihydrogen phosphate product quality be ensured very well simultaneously.
The utility model is achieved by following technical solution.
Prepare a device for potassium primary phosphate for phosphoric acid by wet process, comprise interconnective dilute phosphoric acid storage tank, washing dilute phosphoric acid for sour pump, tubular reactor, ammonia neutralizing well, in and slip whizzer, in and slip storage tank, potassium hydroxide reactive tank, evaporation concentrator, cooling crystallizer, tail gas washing tower, barometric condenser and recirculated water storage tank; The gaseous phase outlet at described ammonia neutralizing well top, the gaseous phase outlet at potassium hydroxide reactive tank top, the gaseous phase outlet at evaporation concentrator top are all connected with the inlet mouth of tail gas washing tower with the gaseous phase outlet of cooling crystallizer, the fluid inlet of tail gas washing tower is connected for sour pump outlet with washing dilute phosphoric acid by pipeline, the gaseous phase outlet of tail gas washing tower is connected with the gas phase import in the middle part of barometric condenser, and the lower liquid pipe of barometric condenser is connected with recirculated water storage tank; Described washing dilute phosphoric acid is connected with dilute phosphoric acid storage tank for the import of sour pump, and the acid mouth of described dilute phosphoric acid storage tank is connected with ammonia neutralizing well.
Described recirculated water storage tank bottom is connected with water cooling tower by water circulating pump, and the water outlet of water cooling tower is connected with the liquid-inlet pipe of barometric condenser.
The acid mouth of described dilute phosphoric acid storage tank is also connected with dilute phosphoric acid for sour pump, dilute phosphoric acid is connected with ammonia neutralizing well by tubular reactor for sour pump outlet, ammonia neutralizing well by recycle pump with in be connected with slip whizzer, in the liquid outlet of slip whizzer with in be connected with the liquid-inlet pipe at slip storage tank top.
The acid inlet of described tubular reactor is also by being connected with liquid ammonia storage tank for alkali pump.
Described device also comprises potassium hydroxide storage tank, and the outlet of potassium hydroxide storage tank is connected with potassium hydroxide dissolving tank by measuring belt, and potassium hydroxide dissolving tank is connected with potassium hydroxide reactive tank.
In described and between slip storage tank with potassium hydroxide reactive tank by be connected with slurry delivery pump.
The liquid outlet of described potassium hydroxide reaction tank bottom is connected with evaporation concentrator by mixed slurry transferpump, evaporation concentration circulating-pump outlet is connected with the opening for feed at cooling crystallizer top by crystallisation by cooling recycle pump, the discharge port of cooling crystallizer is connected through the opening for feed of crystallization buffer groove with finished product whizzer, and the solid-phase outlet of finished product whizzer is connected with drying machine.
Finished product belt conveyor is provided with below described drying machine feed opening, the discharge end of finished product belt conveyor is provided with chapelet, and the discharge end of finished product belt conveyor is positioned at above the opening for feed of chapelet, is provided with finished product packing storehouse below the discharge port of chapelet.
The outlet of described finished product whizzer is connected with potassium primary phosphate mother liquor storage tank, the drain pipe of potassium primary phosphate mother liquor storage tank is connected with the inlet pipe of potassium hydroxide dissolving tank by potassium primary phosphate mother liquor transferpump, and another outlet of potassium primary phosphate mother liquor storage tank goes the import of composite heat transfer pipeline to be connected with mother liquor.
In described and slip whizzer outlet below be provided with in and filter residue conveying belt.
The solid-phase outlet of described finished product whizzer is connected with moisture eliminator by chute, and the outlet of moisture eliminator is positioned at above finished product belt conveyor.
The beneficial effects of the utility model are:
The utility model, by continuous filter unit and tubular reactor efficient combination, can realize the removal of impurities of phosphoric acid by wet process; In ammonia and after filter residue may be used for the production of fertilizer grade monoammonium phosphate; The ammonia of overflowing in ammonia neutralizing well and potassium hydroxide reactive tank, evaporation concentration groove and cooling crystallizer can all be recycled, and discharges without waste gas; Adopt phosphoric acid by wet process to prepare potassium primary phosphate to compare with Re Fa acid, production cost is low, less energy consumption, and environmental pollution is little, has good Social and economic benef@; Ammonia can be reused, and does not cause waste, and a potassium primary phosphate mother liquor part is for preparing potassium hydroxide solution, one is gone system containing K composite fertilizer, production process, without the discharge of waste water,waste gas and industrial residue, by carrying out reaction purification to phosphoric acid by wet process, can prepare the potassium primary phosphate of high-quality.Compared with prior art, the utility model has following remarkable advantage:
(1) facility investment is little, can realize operate continuously;
(2) have part flow arrangement, potassium primary phosphate mother liquor can be divided into the first tributary and the second tributary, the first tributary is for preparing potassium hydroxide solution, Recycling Mother Solution is applied mechanically, further increase the output of potassium primary phosphate, second diffluence NPK composite fertilizer preparation, adds economic benefit;
(3) environmentally friendly operational path, without the discharge of the three wastes;
(4) tail gas is with after dilute phosphoric acid washing, and reclaim ammonia wherein, ammonia can be reused;
(5) phosphoric acid by wet process that this technical process is suitable for different concns prepares potassium primary phosphate, applied range.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: 1-dilute phosphoric acid storage tank, 2-dilute phosphoric acid is for sour pump, 3-washs dilute phosphoric acid for sour pump, 4-liquid liquid ammonia storage tank, 5-is for ammonia pump, 6-tubular reactor, 7-ammonia neutralizing well, in 8-and recycle pump, with slip whizzer in 9-, with filter residue conveying belt in 10-, with slip storage tank in 11-, in 12-and slurry delivery pump, 13-potassium hydroxide storage tank, 14-measuring belt, 15-potassium hydroxide dissolving tank, 16-potassium hydroxide reactive tank, 17-mixed slurry transferpump, 18-evaporation concentrator, 19-evaporation concentration recycle pump, 20-crystallisation by cooling recycle pump, 21-cooling crystallizer, 22-crystallization buffer groove, 23-finished product whizzer, 24-moisture eliminator, 25-potassium primary phosphate mother liquor storage tank, 26-potassium primary phosphate mother liquor transferpump, 27-product conveying belt, 28-chapelet, 29-finished product packing storehouse, 30-tail gas washing tower, 31-barometric condenser, 32-recirculated water storage tank, 33-water cooling tower, 34-water circulating pump, 35-washings transferpump.
Embodiment
The technical solution of the utility model is further described below in conjunction with accompanying drawing, but described in claimed scope is not limited to.
As shown in Figure 1, a kind of device preparing potassium primary phosphate for phosphoric acid by wet process described in the utility model, comprise interconnective dilute phosphoric acid storage tank 1, washing dilute phosphoric acid for sour pump 3, tubular reactor 6, ammonia neutralizing well 7, in and slip whizzer 9, in and slip storage tank 11, potassium hydroxide reactive tank 16, evaporation concentrator 18, cooling crystallizer 21, tail gas washing tower 30, barometric condenser 31 and recirculated water storage tank 32; The gaseous phase outlet at described ammonia neutralizing well 7 top, the gaseous phase outlet at potassium hydroxide reactive tank 16 top, the gaseous phase outlet at evaporation concentrator 18 top are all connected with the inlet mouth of tail gas washing tower 30 with the gaseous phase outlet of cooling crystallizer 21, the fluid inlet of tail gas washing tower 30 is connected with the outlet of washing dilute phosphoric acid for sour pump 3 by pipeline, the gaseous phase outlet of tail gas washing tower 30 is connected with the gas phase import in the middle part of barometric condenser 31, and the lower liquid pipe of barometric condenser 31 is connected with recirculated water storage tank 32; Described washing dilute phosphoric acid is connected with dilute phosphoric acid storage tank 1 for the import of sour pump 3, and the acid mouth of described dilute phosphoric acid storage tank 1 is connected with ammonia neutralizing well 7.
Described recirculated water storage tank 32 bottom is connected with water cooling tower 33 by water circulating pump 34, and the water outlet of water cooling tower 33 is connected with the liquid-inlet pipe of barometric condenser 31.
The acid mouth of described dilute phosphoric acid storage tank 1 is also connected with dilute phosphoric acid for sour pump 2, dilute phosphoric acid is connected with ammonia neutralizing well 7 by tubular reactor 6 for the outlet of sour pump 2, during ammonia neutralizing well 7 passes through with recycle pump 8 with in be connected with slip whizzer 9, in the liquid outlet of slip whizzer 9 with in be connected with the liquid-inlet pipe at slip storage tank 11 top.
The acid inlet of described tubular reactor 6 is also by being connected with liquid ammonia storage tank 4 for alkali pump 5.
Described device also comprises potassium hydroxide storage tank 13, and the outlet of potassium hydroxide storage tank 13 is connected with potassium hydroxide dissolving tank 15 by measuring belt 14, and potassium hydroxide dissolving tank 15 is connected with potassium hydroxide reactive tank 16.Like this, the potassium hydroxide after metering enters in potassium hydroxide dissolving tank 15 by measuring belt 14, and the potassium hydroxide solution that concentration is qualified is entered in potassium hydroxide reactive tank 16 by punishment in advance pump.
Be connected with slurry delivery pump 12 in described and in passing through between slip storage tank 11 with potassium hydroxide reactive tank 16.Like this, in ammonia neutralizing well 7 and slip in and slurry delivery pump 12 effect under enter in potassium hydroxide reactive tank 16.
Liquid outlet bottom described potassium hydroxide reactive tank 16 is connected with evaporation concentrator 18 by mixed slurry transferpump 17, evaporation concentration recycle pump 19 is exported and is connected by the opening for feed of crystallisation by cooling recycle pump 20 with cooling crystallizer 21 top, the discharge port of cooling crystallizer 21 is connected through the opening for feed of crystallization buffer groove 22 with finished product whizzer 23, and the solid-phase outlet of finished product whizzer 23 is connected with drying machine 24.
Finished product belt conveyor 27 is provided with below described drying machine 24 feed opening, the discharge end of finished product belt conveyor 27 is provided with chapelet 28, and the discharge end of finished product belt conveyor 27 is positioned at above the opening for feed of chapelet 28, is provided with finished product packing storehouse 29 below the discharge port of chapelet 28.
The outlet of described finished product whizzer 23 is connected with potassium primary phosphate mother liquor storage tank 25, the drain pipe of potassium primary phosphate mother liquor storage tank 25 is connected with the inlet pipe of potassium hydroxide dissolving tank 15 by potassium primary phosphate mother liquor transferpump 26, and another outlet of potassium primary phosphate mother liquor storage tank 25 and mother liquor go the import of composite heat transfer pipeline to be connected (not shown).
Be connected with the recycle feed mouth in the middle part of ammonia neutralizing well 7 with the outlet of recycle pump 8 in described.
In described and slip whizzer 9 outlet below be provided with in and filter residue conveying belt 10.The slip that degree of neutralization is qualified, in being entered by punishment in advance pump and slip whizzer 9, during the mother liquor obtained after centrifugal carries out and in slip storage tank, filter residue by and filter residue tape transport remove composite heat transfer to composite heat transfer workshop.
The solid-phase outlet of described finished product whizzer 23 is connected with moisture eliminator 24 by chute, and the outlet of moisture eliminator 24 is positioned at above finished product belt conveyor 27.
Working process of the present utility model is further described below in conjunction with accompanying drawing.
As shown in Figure 1, during device busy described in the utility model, the dilute phosphoric acid come from extraction plant enters dilute phosphoric acid storage tank 1, squeeze in tubular reactor 6 through dilute phosphoric acid for sour pump 2, carry out being obtained by reacting phosphor ammonium slurry with the ammonia from liquid ammonia storage tank 4, phosphor ammonium slurry enters in ammonia neutralizing well 7 with tubular reactor 6, slip in and recycle pump 8 effect under at ammonia neutralizing well 7 internal recycle, react qualified after phosphor ammonium slurry enter in and slip whizzer 9 inner filtration, filter residue is by delivering to phosphate fertilizer Workshop Production phosphate fertilizer with filter residue conveying belt 10 in ammonia, gained filtrate is the phosphor ammonium slurry after purification, during phosphor ammonium slurry after purification enters and in slip storage tank 11, send in potassium hydroxide reactive tank 16 with slurry delivery pump 12 in ammonia, potassium hydroxide in potassium hydroxide storage tank 13 enters in potassium hydroxide dissolving tank 15 by measuring belt 14, potassium hydroxide solution in potassium hydroxide dissolving tank 15 enters in potassium hydroxide reactive tank 16 by punishment in advance pump, mixing solutions in potassium hydroxide reactive tank 16 is transported in concentration evaporator 18 by mixed slurry transferpump 17, slip in evaporation concentrator 18 is by evaporation concentration recycle pump 19 circulating and evaporating, concentrated qualified slip passed through liquid pump and was transported in cooling crystallizer 21, slip in cooling crystallizer 21 is circulated by coolant circulation pump 20, the slip of certain temperature is cooled to enter in crystallization buffer groove 22, slip in crystallization buffer groove 22 enters in finished product whizzer 23, solid-phase outlet in finished product whizzer 23 is connected with moisture eliminator 24 by chute, the liquid-phase outlet of finished product whizzer 23 is connected with potassium primary phosphate mother liquor storage tank 25, part potassium primary phosphate mother liquor is delivered in potassium hydroxide dissolving tank 15 by potassium primary phosphate mother liquor transferpump 26, part potassium primary phosphate mother liquor is delivered to NPK composite heat transfer workshop by potassium primary phosphate mother liquor transferpump 26, dry qualified potassium primary phosphate is by finished product belt conveyor 27, chapelet 28 is delivered in finished product packing storehouse 29 and packs, the gaseous phase outlet at ammonia neutralizing well 7 top, 16 top gas phase outlets in potassium hydroxide reactive tank, the outlet of evaporation concentrator 18 top gas phase is connected with the gas phase import bottom tail gas washing tower 30 with the gaseous phase outlet at cooling crystallizer 21 top, phosphoric acid by wet process from extraction supplies sour pump 3 to be transported to the fluid inlet at tail gas washing tower 30 top by washing dilute phosphoric acid, the gaseous phase outlet of tail gas washing tower 30 is connected with barometric condenser 31, after the moisture that barometric condenser removes wherein, tail gas is emptying.There is a recirculated water storage tank 32 below of barometric condenser 31, and the water in recirculated water storage tank is transported in barometric condenser for water coolant steam after water cooling tower.
Claims (11)
1. prepare a device for potassium primary phosphate for phosphoric acid by wet process, it is characterized in that: comprise interconnective dilute phosphoric acid storage tank (1), washing dilute phosphoric acid for sour pump (3), tubular reactor (6), ammonia neutralizing well (7), in and slip whizzer (9), in and slip storage tank (11), potassium hydroxide reactive tank (16), evaporation concentrator (18), cooling crystallizer (21), tail gas washing tower (30), barometric condenser (31) and recirculated water storage tank (32), the gaseous phase outlet at described ammonia neutralizing well (7) top, the gaseous phase outlet at potassium hydroxide reactive tank (16) top, the gaseous phase outlet at evaporation concentrator (18) top is all connected with the inlet mouth of tail gas washing tower (30) with the gaseous phase outlet of cooling crystallizer (21), the fluid inlet of tail gas washing tower (30) is connected with the outlet of washing dilute phosphoric acid for sour pump (3) by pipeline, the gaseous phase outlet of tail gas washing tower (30) is connected with the gas phase import at barometric condenser (31) middle part, the lower liquid pipe of barometric condenser (31) is connected with recirculated water storage tank (32), described washing dilute phosphoric acid is connected with dilute phosphoric acid storage tank (1) for the import of sour pump (3), and the acid mouth of described dilute phosphoric acid storage tank (1) is connected with ammonia neutralizing well (7).
2. a kind of device preparing potassium primary phosphate for phosphoric acid by wet process according to claim 1, it is characterized in that: described recirculated water storage tank (32) bottom is connected with water cooling tower (33) by water circulating pump (34), and the water outlet of water cooling tower (33) is connected with the liquid-inlet pipe of barometric condenser (31).
3. a kind of device preparing potassium primary phosphate for phosphoric acid by wet process according to claim 1, it is characterized in that: the acid mouth of described dilute phosphoric acid storage tank (1) is also connected with dilute phosphoric acid for sour pump (2), dilute phosphoric acid is connected with ammonia neutralizing well (7) by tubular reactor (6) for the outlet of sour pump (2), during ammonia neutralizing well (7) passes through with recycle pump (8) with in be connected with slip whizzer (9), in the liquid outlet of slip whizzer (9) with in be connected with the liquid-inlet pipe at slip storage tank (11) top.
4. a kind of device preparing potassium primary phosphate for phosphoric acid by wet process according to claim 2, is characterized in that: the acid inlet of described tubular reactor (6) is also by being connected with liquid ammonia storage tank (4) for alkali pump (5).
5. a kind of device preparing potassium primary phosphate for phosphoric acid by wet process according to claim 1, it is characterized in that: described device also comprises potassium hydroxide storage tank (13), the outlet of potassium hydroxide storage tank (13) is connected with potassium hydroxide dissolving tank (15) by measuring belt (14), and potassium hydroxide dissolving tank (15) is connected with potassium hydroxide reactive tank (16).
6. a kind of device preparing potassium primary phosphate for phosphoric acid by wet process according to claim 1, is characterized in that: be connected with slurry delivery pump (12) in described and in passing through between slip storage tank (11) with potassium hydroxide reactive tank (16).
7. a kind of device preparing potassium primary phosphate for phosphoric acid by wet process according to claim 1, it is characterized in that: the liquid outlet of described potassium hydroxide reactive tank (16) bottom is connected with evaporation concentrator (18) by mixed slurry transferpump (17), evaporation concentration recycle pump (19) outlet is connected by the opening for feed of crystallisation by cooling recycle pump (20) with cooling crystallizer (21) top, the discharge port of cooling crystallizer (21) is connected through the opening for feed of crystallization buffer groove (22) with finished product whizzer (23), the solid-phase outlet of finished product whizzer (23) is connected with drying machine (24).
8. a kind of device preparing potassium primary phosphate for phosphoric acid by wet process according to claim 7, it is characterized in that: below described drying machine (24) feed opening, be provided with finished product belt conveyor (27), the discharge end of finished product belt conveyor (27) is provided with chapelet (28), and the discharge end of finished product belt conveyor (27) is positioned at above the opening for feed of chapelet (28), below the discharge port of chapelet (28), be provided with finished product packing storehouse (29).
9. a kind of device preparing potassium primary phosphate for phosphoric acid by wet process according to claim 7, it is characterized in that: the outlet of described finished product whizzer (23) is connected with potassium primary phosphate mother liquor storage tank (25), the drain pipe of potassium primary phosphate mother liquor storage tank (25) is connected with the inlet pipe of potassium hydroxide dissolving tank (15) by potassium primary phosphate mother liquor transferpump (26), and another outlet of potassium primary phosphate mother liquor storage tank (25) goes the import of composite heat transfer pipeline to be connected with mother liquor.
10. a kind of device preparing potassium primary phosphate for phosphoric acid by wet process according to claim 1, is characterized in that: in described and slip whizzer (9) outlet below be provided with in and filter residue conveying belt (10).
11. a kind of devices preparing potassium primary phosphate for phosphoric acid by wet process according to claim 7, it is characterized in that: the solid-phase outlet of described finished product whizzer (23) is connected with moisture eliminator (24) by chute, and the outlet of moisture eliminator (24) is positioned at finished product belt conveyor (27) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520819437.8U CN205170393U (en) | 2015-10-21 | 2015-10-21 | A device for phosphoric acid by wet process preparation potassium dihydrogen phosphate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520819437.8U CN205170393U (en) | 2015-10-21 | 2015-10-21 | A device for phosphoric acid by wet process preparation potassium dihydrogen phosphate |
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| Publication Number | Publication Date |
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| CN205170393U true CN205170393U (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520819437.8U Expired - Fee Related CN205170393U (en) | 2015-10-21 | 2015-10-21 | A device for phosphoric acid by wet process preparation potassium dihydrogen phosphate |
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| CN (1) | CN205170393U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108046864A (en) * | 2017-11-13 | 2018-05-18 | 兰小春 | Hydrochloric acid decomposes the method and device of low-grade phosphate ore production water soluble composite fertilizer |
| CN115818598A (en) * | 2022-09-27 | 2023-03-21 | 中石化南京工程有限公司 | System and method for concentrating phosphoric acid by using low-level heat energy |
| CN116474622A (en) * | 2023-06-26 | 2023-07-25 | 昆明云盘山农牧科技有限公司 | Production device for preparing monopotassium phosphate by wet-process phosphoric acid |
-
2015
- 2015-10-21 CN CN201520819437.8U patent/CN205170393U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108046864A (en) * | 2017-11-13 | 2018-05-18 | 兰小春 | Hydrochloric acid decomposes the method and device of low-grade phosphate ore production water soluble composite fertilizer |
| CN115818598A (en) * | 2022-09-27 | 2023-03-21 | 中石化南京工程有限公司 | System and method for concentrating phosphoric acid by using low-level heat energy |
| CN116474622A (en) * | 2023-06-26 | 2023-07-25 | 昆明云盘山农牧科技有限公司 | Production device for preparing monopotassium phosphate by wet-process phosphoric acid |
| CN116474622B (en) * | 2023-06-26 | 2023-09-22 | 昆明云盘山农牧科技有限公司 | Production device for preparing monopotassium phosphate by wet-process phosphoric acid |
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Granted publication date: 20160420 Termination date: 20191021 |