CN202880886U - Device for producing monopotassium phosphate by using double decomposition method - Google Patents
Device for producing monopotassium phosphate by using double decomposition method Download PDFInfo
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- CN202880886U CN202880886U CN 201220454910 CN201220454910U CN202880886U CN 202880886 U CN202880886 U CN 202880886U CN 201220454910 CN201220454910 CN 201220454910 CN 201220454910 U CN201220454910 U CN 201220454910U CN 202880886 U CN202880886 U CN 202880886U
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Abstract
The utility model relates to a device for producing monopotassium phosphate by using a double decomposition method. The device comprises a monopotassium phosphate reaction tank, a potassium chloride or potassium carbonate dissolving tank, a phosphoric acid storage tank, a neutralizing tank, a fully-automatic box pressure filter, a transfer tank, an evaporative concentration device, a vacuum cooling tank, a cooling crystallization tank, a piston-pushing centrifugal filter and a vibrated fluidized bed drier, wherein the tops of an HCl absorbing device, a flash chamber and the vacuum cooling tank are respectively connected with an atmospheric condenser, a liquid sealing tank is connected to the bottom of the atmospheric condenser, and the liquid sealing tank, a cooling tower, a circulating water pool and the atmospheric condenser form a circulating system through a pump. The device disclosed by the utility model is used for producing the monopotassium phosphate by enabling wet-process phosphoric acid or scourage as a byproduct produced in the refining process of the wet-process phosphoric acid to react with potassium chloride or potassium carbonate and is low in production cost, simple in technological flow, mild in reaction conditions, small in equipment corrosion and good in production of the monopotassium phosphate product.
Description
Technical field
The utility model relates to a kind of production equipment of potassium primary phosphate, particularly with the device of double decomposition by Repone K or salt of wormwood and phosphoric acid by wet process or wet phosphoric acid refining byproduct in process thing scrub raffinate reaction production potassium primary phosphate.
Background technology
In China, the method for traditional mode of production potassium primary phosphate mainly contains neutralisation and double decomposition, and wherein neutralisation technique is simple, but because feed hydrogen potassium oxide or salt of wormwood cost are high, can't promote in the production of agricultural fertilizer and industrial potassium primary phosphate; Double decomposition mainly utilizes Repone K and industrial phosphoric acid (thermal phosphoric acid) to carry out replacement(metathesis)reaction under heating condition, by shifting out hydrogen chloride gas that reaction produces so that reaction forward is carried out, but because of have that the industrial phosphoric acid price is high, energy consumption is high and product in the problems such as chloride ion content exceeds standard, fail to obtain large-scale promotion.Adopt the Patents of producing potassium dihydrogen phosphate with double decomposition method that CN101343052, CN101343053A, 201010223536.1 and CN1324760A are arranged, this type of technique adopts industrial phosphoric acid and Repone K in 200～300 ℃ of lower reactions of high temperature equally, reaction times is many at 2～3h, obtain first potassium pyrophosphate, being hydrolyzed obtains potassium primary phosphate again.React because of under the high temperature, not only need lot of energy, serious to equipment corrosion, and also the product composition that obtains in the reaction is many, potassium pyrophosphate, Rapisol and potassium metaphosphate are arranged, so these class methods does not obtain large-scale promotion yet.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of production equipment that directly utilizes phosphoric acid by wet process or wet phosphoric acid refining byproduct in process thing scrub raffinate and Repone K (or salt of wormwood) reaction to produce potassium primary phosphate is provided.
The utility model is achieved through the following technical solutions:
A kind of device of producing potassium dihydrogen phosphate with double decomposition method, the biphosphate potassium reaction of production equipment, link to each other with dissolving tank and phosphoric acid storage tank, the biphosphate potassium reaction, neutralizing well, the Full-automatic box type pressure filter, transfer tank, evaporation concentration device, the vacuum cooling groove, the crystallisation by cooling groove, piston material pushing centrifugal filter and Vibratingfluidbeddrier link to each other successively, reactive tank top is connected with the HCl absorption unit by induced draft fan, the HCl absorption unit, evaporation concentration device and vacuum cooling groove top all are connected with barometric condenser, the condenser bottom is connected with liquid seal trough, and liquid seal trough is by pump and cooling tower, circulating water pool, barometric condenser forms the recycle system.
Described biphosphate potassium reaction is the cylindric band cone end, and band outer circulation and vacuumizing.
Described its volume of biphosphate potassium reaction can stop more than the 3h in groove to guarantee slip under current technique flow.
Described evaporation concentration device is an effect, two effect or three effect systems.
The utility model device adopts phosphoric acid by wet process or wet phosphoric acid refining byproduct in process thing scrub raffinate and Repone K (or salt of wormwood) reaction to produce potassium primary phosphate, production cost is low, technical process is simple, reaction conditions is gentle, equipment corrosion is little, the potassium dihydrogen phosphate product quality is good, is conducive to product and promotes at feedstuff industry and agriculture field.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is equipment layout synoptic diagram of the present utility model.
Embodiment
Further introduce the utility model below by specific embodiment, but embodiment can not consist of to restriction of the present utility model.
A kind of device of producing potassium dihydrogen phosphate with double decomposition method, the biphosphate potassium reaction 3 of production equipment, link to each other with dissolving tank 1 and phosphoric acid storage tank 2, biphosphate potassium reaction 3, neutralizing well 4, Full-automatic box type pressure filter 5, transfer tank 6, evaporation concentration device 7, vacuum cooling groove 8, crystallisation by cooling groove 9, piston material pushing centrifugal filter 10 and Vibratingfluidbeddrier 11 link to each other successively, reactive tank 3 tops are connected with HCl absorption unit 13 by induced draft fan 12, HCl absorption unit 13, evaporation concentration device 7 is connected the top and all is connected with barometric condenser 15 with the vacuum cooling groove, condenser 15 bottoms are connected with liquid seal trough 16, and liquid seal trough 16 is by pump and cooling tower 17, circulating water pool 18, barometric condenser 15 forms the recycle system.
Described biphosphate potassium reaction 3 is the cylindric band cone end, and band outer circulation and vacuumizing.
Described biphosphate potassium reaction 3 its volumes can stop more than the 3h in groove to guarantee slip under current technique flow.
Described evaporation concentration device 7 is an effect, two effect or three effect systems.
Working process of the present utility model is as follows: first Repone K or salt of wormwood are dissolved at dissolving tank 1, again Klorvess Liquid and refined wet process phosphoric acid byproduct in process thing scrub raffinate are pressed technique flow volume pump to biphosphate potassium reaction 3, guarantee that slip can carry out replacement(metathesis)reaction in the reactive tank 3, in reactive tank 3, directly lead to steam heating simultaneously, slip adopts forced circulation pump to carry out closed cycle in the reactive tank 3, opens HCl hydrogen absorption unit 13 and controls the vacuum tightness of processing requirement in the reactive tank 3 well.Fully the slip of reaction flow to the neutralizing well 4 from biphosphate potassium reaction 3 sidewall overflow ports, and the scrub raffinate neutralization reaction is complete completely with unreacted at neutralizing well 4 usefulness potassium hydroxide, solution endpoint pH in the control neutralizing well 4.Neutralization reaction completely shurry pump is filtered to Full-automatic box type filter 5, and filter residue is delivered to the slag field and stored up, and filtrate pump is to evaporation concentration device 7, controls the proportion of temperature in two evaporation greenhouses of evaporation concentration device 7, vacuum tightness and slip well; Through the concentrated direct overflow of supersaturated solution crystallization to the crystallisation by cooling groove 9, suspension after the crystallization is put to piston material pushing centrifugal filter 10 and is filtered, filtrate is back in the reactive tank 3, xln is sent to and is carried out drying in the Vibratingfluidbeddrier 11, and the potassium primary phosphate finished product that obtains is after drying packed with automatic packing machine.
Claims (4)
1. the device of a producing potassium dihydrogen phosphate with double decomposition method, it is characterized in that: the biphosphate potassium reaction (3) of production equipment links to each other with dissolving tank (1) and phosphoric acid storage tank (2), biphosphate potassium reaction (3), neutralizing well (4), Full-automatic box type pressure filter (5), transfer tank (6), evaporation concentration device (7), vacuum cooling groove (8), crystallisation by cooling groove (9), piston material pushing centrifugal filter (10) and Vibratingfluidbeddrier (11) link to each other successively, reactive tank (3) top is connected with HCl absorption unit (13) by induced draft fan (12), HCl absorption unit (13), evaporation concentration device (7) is connected 8 with the vacuum cooling groove) top all is connected with barometric condenser (15), condenser (15) bottom is connected with liquid seal trough (16), and liquid seal trough (16) is by pump and cooling tower (17), circulating water pool (18), barometric condenser (15) forms the recycle system.
2. according to the device of claims 1 described producing potassium dihydrogen phosphate with double decomposition method, it is characterized in that: described biphosphate potassium reaction (3) is the cylindric band cone end.
3. the device of producing potassium dihydrogen phosphate with double decomposition method according to claim 1 and 2, it is characterized in that: its volume of described biphosphate potassium reaction (3) can stop more than the 3h in groove to guarantee slip under current technique flow.
4. the device of producing potassium dihydrogen phosphate with double decomposition method according to claim 1 is characterized in that: described evaporation concentration device (7) is an effect, two effect or three effect systems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220454910 CN202880886U (en) | 2012-09-08 | 2012-09-08 | Device for producing monopotassium phosphate by using double decomposition method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220454910 CN202880886U (en) | 2012-09-08 | 2012-09-08 | Device for producing monopotassium phosphate by using double decomposition method |
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| CN202880886U true CN202880886U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220454910 Expired - Fee Related CN202880886U (en) | 2012-09-08 | 2012-09-08 | Device for producing monopotassium phosphate by using double decomposition method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102862964A (en) * | 2012-09-08 | 2013-01-09 | 湖北三宁化工股份有限公司 | Device and method for producing monopotassium phosphate by using double decomposition |
| CN104014156A (en) * | 2014-05-30 | 2014-09-03 | 江苏嘉泰蒸发结晶设备有限公司 | Sodium chloride evaporation crystallization device |
| CN108267028A (en) * | 2018-02-24 | 2018-07-10 | 安阳九天精细化工有限责任公司 | Space division chilldown system |
-
2012
- 2012-09-08 CN CN 201220454910 patent/CN202880886U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102862964A (en) * | 2012-09-08 | 2013-01-09 | 湖北三宁化工股份有限公司 | Device and method for producing monopotassium phosphate by using double decomposition |
| CN102862964B (en) * | 2012-09-08 | 2014-07-23 | 湖北三宁化工股份有限公司 | Device and method for producing monopotassium phosphate by using double decomposition |
| CN104014156A (en) * | 2014-05-30 | 2014-09-03 | 江苏嘉泰蒸发结晶设备有限公司 | Sodium chloride evaporation crystallization device |
| CN108267028A (en) * | 2018-02-24 | 2018-07-10 | 安阳九天精细化工有限责任公司 | Space division chilldown system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20180908 |
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| CF01 | Termination of patent right due to non-payment of annual fee |