CN205709872U - A kind of device of industry Wet Phosphoric Acid Market continuous potassium dihydrogen phosphate production - Google Patents

A kind of device of industry Wet Phosphoric Acid Market continuous potassium dihydrogen phosphate production Download PDF

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Publication number
CN205709872U
CN205709872U CN201620340069.3U CN201620340069U CN205709872U CN 205709872 U CN205709872 U CN 205709872U CN 201620340069 U CN201620340069 U CN 201620340069U CN 205709872 U CN205709872 U CN 205709872U
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mother liquor
dihydrogen phosphate
potassium dihydrogen
phosphoric acid
grades
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师永林
李军
韩喜超
孔剑梅
薛河南
单荣
彭明辉
冯磊
何正兵
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Co Ltd Of Yunnan Chemical Designing Institute
Yunnan Yuntianhua Co Ltd
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Co Ltd Of Yunnan Chemical Designing Institute
Yunnan Yuntianhua Co Ltd
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Abstract

The utility model discloses the device of a kind of industry Wet Phosphoric Acid Market continuous potassium dihydrogen phosphate production, including one-level dodges cooling crystallizer, two grades of cooler crystallizers, thickener and mother liquor feeder, mother liquor in two grades of cooler crystallizers, thickener and centrifuge introduces mother liquor feeder by pipeline respectively, introduce enrichment process after pretreatment, finally the mother liquor having concentrated is introduced one-level and dodge cooling crystallizer.The utility model is with commercial wet process purifying phosphoric acid as raw material, effectively reduce potassium dihydrogen phosphate production cost, and utilized by achieving the complete alternation of potassium dihydrogen phosphate mother liquor to mother liquor pretreatment, improve phosphorous recovery, achieve continuous prodution, it is sufficiently used neutralization reaction heat, reduce concentration load, saved steam consumption.The utility model simple in construction, processing ease, continuity are strong, efficiently solve the problems such as intermittent operation, labour intensity in tradition neutralisation technique are big.

Description

A kind of device of industry Wet Phosphoric Acid Market continuous potassium dihydrogen phosphate production
Technical field
The utility model belongs to potassium dihydrogen phosphate and produces equipment technical field, is specifically related to a kind of net with commercial wet process Changing phosphoric acid is raw material, the device of continuous potassium dihydrogen phosphate production.
Background technology
Potassium dihydrogen phosphate is a kind of important phosphorus chemical product, its application widely, agriculturally Mainly as efficient phosphorus potassium complex fertilizer, have significant increasing both production and income, the amount of changing optimize quality, resistant to lodging, Many excellent effects such as disease and insect resistance, preventing and treating early ageing.With the development of water-fertilizer integral, water soluble fertilizer Development is swift and violent, it has also become one of Main way of Fertilizer development.Potassium dihydrogen phosphate is as high-end full water-soluble Fertilizer, will have wide market prospects in future.In addition, as buffering conditioning agent in pharmaceuticals industry, It is used as casate, buffering conditioning agent and nutritional agents in fermentation industry, as life in chemical industry Produce the industrial chemicals of potassium pyrophosphate and other sylvite.
At present, the production method of the potassium dihydrogen phosphate in succession developed both at home and abroad has a lot, mainly have neutralisation, Direct method, double decomposition, ion-exchange, electrolysis, solvent extraction etc., wherein representative Production method mainly have neutralisation, solvent extraction.
Neutralisation is the potassium dihydrogen phosphate production technology of current domestic main flow, is usually with thermal phosphoric acid and hydrogen Potassium oxide is raw material, neutralized, crystallisation by cooling, centrifugation, is dried and produces potassium dihydrogen phosphate product. The yield using this technique accounts for more than the 90% of potassium dihydrogen phosphate total output.At present, China's neutralisation Potassium dihydrogen phosphate production technology is generally with highly energy-consuming thermal phosphoric acid as raw material, and device production scale is less, Typically be less than 20,000 tons/year, and be substantially employing tradition jacket reactor produce, for interval Formula operates, and there is production operation intensity relatively big, and efficiency is relatively low, and production cost is high, lacks competing Strive the problems such as power.
Chinese patent 201320178302.9 discloses one " potassium dihydrogen phosphate continuous crystallisation device ", should Device is potassium dihydrogen phosphate crystallization feed liquid to be passed through one-level dodge cooling crystallizer continuously, and one-level dodges cold crystallization continuously Device is connected by crystallization punishment in advance pump and two grades of continuous cooling crystallizers, and two grades of continuous cooling crystallizers pass through Crystallization discharging pump is connected with thickener, and thickener is connected with centrifuge, centrifuge and potassium dihydrogen phosphate Solid subsequent treatment workshop section is connected, and wherein one-level dodges cooling crystallizer continuously is that DTB dodges cooling crystallizer, and two Level continuous crystalizer is OSLO cooler crystallizer.In addition, one-level successive flash vaporization crystallizer need to increase thin crystalline substance Arrester, by being passed through steam in fine crystal elimination device, thin brilliant, so in dissolving phosphoric acid potassium dihydrogen slip After be re-fed into one-level and dodge cooling crystallizer continuously.Additionally, OSLO crystal external condensation device water inlet and delivery port pass through Cooling water circulating pump is connected.Though the subject matter that this device exists is to realize that potassium dihydrogen phosphate is tied continuously Crystalline substance, but it with potassium dihydrogen phosphate crystallization feed liquid as raw material, is only capable of realizing crystallization process, it is impossible to realize phosphoric acid Synchronization carry out with crystallize with reaction with potassium hydroxide, in addition, this device need to increase fine crystal elimination device, Use and lead to steam-heated method, eliminate the thin crystalline substance in slip, operation in the middle part of one-level successive flash vaporization crystallizer On more bother, Energy harvesting is unreasonable, and whole crystallization process is easy to Crystallization Plugging.
In sum, tradition neutralisation potassium dihydrogen phosphate process units is all to be former with highly energy-consuming thermal phosphoric acid Material, uses tradition jacket reactor to carry out batch production, and production operation intensity is relatively big, and production efficiency is relatively Low, product is lacked competitiveness.In the prior art, also not direct is former with commercial wet process purifying phosphoric acid Material, uses continuity method to produce the device of potassium dihydrogen phosphate.
Utility model content
The purpose of this utility model is for the deficiencies in the prior art, provides one industry wet-process clean Change phosphoric acid and produce the device of potassium dihydrogen phosphate as raw material, employing continuity method.To simplify operation, to reduce Potassium dihydrogen phosphate production cost.
The purpose of this utility model is achieved by the following technical programs.
The device of a kind of industry Wet Phosphoric Acid Market continuous potassium dihydrogen phosphate production, including one-level dodges cold junction Brilliant device the 1st, two grades of cooler crystallizer the 3rd, thickeners 7 and mother liquor feeder 10, it is characterised in that: one-level The discharging opening dodging cooling crystallizer 1 passes through the charging aperture of first degree crystalline discharging pump 2 and two grades of cooler crystallizers 3 Connection;Being provided with crystal external condensation device 4 on two grades of cooler crystallizers 3, both are by crystallisation cycle pump 6 even Logical;The discharging opening of two grades of cooler crystallizers 3 is by the charging aperture of secondary crystallization discharging pump 5 and thickener 7 Connection;The discharging opening of thickener 7 connects with the charging aperture of centrifuge 8, the discharging opening of centrifuge 8 with dry The charging aperture connection of dry machine 9;Mother liquor in two grades of cooler crystallizer the 3rd, thickeners 7 and centrifuge 8 divides Tong Guo not introduce mother liquor feeder 10 by pipeline;
Described mother liquor feeder 10 is by pipeline and mother liquid disposal groove I12, mother liquid disposal groove II 13, pressure Filter 15 and clear mother liquor storage tank 16 sequential communication;Between mother liquor feeder 10 and mother liquid disposal groove I12 Mother liquor pump I11 is set, mother liquor pump II 14 is set between mother liquid disposal groove II 13 and filter press 15;
Clear mother liquor storage tank 16 is connected with triple effect enrichment facility, the effect separation chamber in triple effect enrichment facility 19th, two effect separation chambers 21 and triple effect separation chamber 23 sequential communication, each separation chamber supporting being provided with respectively is changed Hot device;The clear mother liquor that clear mother liquor storage tank 16 is discharged introduces an effect separation chamber 19 by clear mother liquor pump 17, and three The discharging opening of effect separation chamber 23 connects with concentrated mother liquor storage tank 24, the discharging opening of concentrated mother liquor storage tank 24 Connected with the circulating mother liquor charging aperture that one-level dodges cooling crystallizer 1 by concentrated mother liquor pump 25.
Described one-level is dodged cooling crystallizer 1 and is provided with phosphoric acid charging aperture 26 and dodges cold steam exhaust-gas mouth 27, Dodge cold steam exhaust-gas mouth 27 to be connected with vacuum system.
Described crystal external condensation device 4 is provided with recirculated water water inlet 28 and recirculated water water return outlet 29.
Described drying machine 9 is provided with potassium dihydrogen phosphate product discharging opening 30.
Described mother liquid disposal groove II 13 is provided with potassium hydroxide solution charging aperture 31.
A described effect heat exchanger 18 is provided with low pressure steam inlet 32.
Described triple effect separation chamber 23 is provided with indirect steam outlet 33.
Described an effect heat exchanger the 18th, two effect heat exchangers 20 and three-effect heat exchanger 22 are provided with condensation Water out 34.
Described one-level is dodged cooling crystallizer 1 and is dodged cooling crystallizer, two grades of described cooler crystallizers 3 for DTB For OSLO cooler crystallizer.
The utility model compared with prior art, has the advantage that
(1) the utility model achieves and replaces thermal phosphoric acid to produce for raw material with commercial wet process purifying phosphoric acid Potassium dihydrogen phosphate, can effectively reduce potassium dihydrogen phosphate production cost.Simultaneously by mother liquor pretreatment is realized The complete alternation of potassium dihydrogen phosphate mother liquor utilizes, and improves phosphorous recovery, and products obtained therefrom is crystalline particulate, Inherent quality meets the high-class product quality requirement of industrial potassium dihydrogen phosphate standard (HG/T4511-2013).
(2) the utility model uses one-level DTB to dodge+two grades of OSLO cooler crystallizers of cooling crystallizer, real Show in commercial wet process purifying phosphoric acid and phosphorus potassium concentrated mother liquor serialization and reacted and crystallization process, fully Make use of neutralization reaction heat, reduce concentration load, saved steam consumption.
(3) the utility model operational control is simple, and system serialization is strong, efficiently solves in tradition With reactor intermittent operation, production capacity is low, and labour intensity is big, neutralization reaction heat fails fully profit With etc. problem.
Brief description
Fig. 1 is overall structure schematic diagram of the present utility model.
In figure: 1-one-level dodges cooling crystallizer, 2-first degree crystalline discharging pump, bis-grades of cooler crystallizers of 3-, 4- Crystal external condensation device, 5-secondary crystallization discharging pump, 6-crystallisation cycle pump, 7-thickener, 8-centrifuge, 9- Drying machine, 10-mother liquor feeder, 11-mother liquor pump I, 12-mother liquid disposal groove I, 13-mother liquid disposal groove II, 14-mother liquor pump II, 15-filter press, 16-clear mother liquor storage tank, 17-clear mother liquor pump, 18-mono-effect is changed Hot device, 19-mono-imitates separation chamber, and 20-bis-imitates heat exchanger, and 21-bis-imitates separation chamber, 22-three-effect heat exchanger, 23-triple effect separation chamber, 24-concentrated mother liquor storage tank, 25-concentrated mother liquor pump, 26-phosphoric acid charging aperture, 27- Dodging cold steam exhaust-gas mouth, 28-recirculated water water inlet, 29-recirculated water water return outlet, 30-potassium dihydrogen phosphate produces Product discharging opening, 31-potassium hydroxide solution charging aperture, 32-low pressure steam inlet, 33-indirect steam exports, 34-condensation-water drain.
Detailed description of the invention
With embodiment, the utility model is further described below in conjunction with the accompanying drawings, but drawings and Examples It is not the restriction to technical solutions of the utility model.Any change made based on the utility model training centre Change, belong to protection domain of the present utility model.
Embodiment
As it is shown in figure 1, the device of a kind of industry Wet Phosphoric Acid Market continuous potassium dihydrogen phosphate production, bag Include one-level and dodge cooling crystallizer the 1st, two grades of cooler crystallizer the 3rd, thickeners 7 and mother liquor feeder 10, described One-level dodge cooling crystallizer 1 and dodge cooling crystallizer for DTB, described two grades of cooler crystallizers 3 are OSLO Cooler crystallizer, DTB dodges the discharging opening of cooling crystallizer by first degree crystalline discharging pump 2 and OSLO cooling knot The charging aperture connection of brilliant device;Being provided with two groups of crystal external condensation devices 4 on OSLO cooler crystallizer, both pass through Crystallisation cycle pump 6 connects, the discharging opening of two groups of crystal external condensation devices 4 respectively with OSLO cooler crystallizer Charging aperture connects;The discharging opening of OSLO cooler crystallizer is by secondary crystallization discharging pump 5 and thickener 7 Charging aperture connection;The discharging opening of thickener 7 connects with the charging aperture of centrifuge 8, going out of centrifuge 8 Material mouth connects with the charging aperture of drying machine 9;In OSLO cooler crystallizer, thickener 7 and centrifuge 8 Mother liquor introduces mother liquor feeder 10 by pipeline respectively;
Described mother liquor feeder 10 is by pipeline and mother liquid disposal groove I12, mother liquid disposal groove II 13, pressure Filter 15 and clear mother liquor storage tank 16 sequential communication, described filter press 15 is provided with two groups;Mother liquor is received Between collection groove 10 and mother liquid disposal groove I12, mother liquor pump I 11, mother liquid disposal groove II 13 and two groups of pressures are set Mother liquor pump II 14 is set between filter 15;
Clear mother liquor storage tank 16 is connected with the effect separation chamber 19 in triple effect enrichment facility, and triple effect concentrates dress An effect separation chamber the 19th, two effect separation chambers 21 and triple effect separation chamber 23 sequential communication, each separation chamber in putting The 18th, the supporting effect heat exchanger that is provided with two imitates heat exchangers 20 and three-effect heat exchanger 22 respectively;Clear mother liquor storage The clear mother liquor that groove 16 is discharged introduces an effect separation chamber 19 by clear mother liquor pump 17, triple effect separation chamber 23 Discharging opening connects with concentrated mother liquor storage tank 24, and the discharging opening of concentrated mother liquor storage tank 24 passes through concentrated mother liquor pump 25 connect with the circulating mother liquor charging aperture of one-level DTB sudden strain of a muscle cooling crystallizer;
Described DTB dodges cooling crystallizer and is provided with phosphoric acid charging aperture 26 and dodges cold steam exhaust-gas mouth 27, dodges Cold steam exhaust-gas mouth 27 is connected with vacuum system;Two groups of described crystal external condensation devices 4 are provided with and follow Ring water water inlet 28 and recirculated water water return outlet 29;Described drying machine 9 is provided with potassium dihydrogen phosphate product Discharging opening 30;Described mother liquid disposal groove II 13 is provided with potassium hydroxide solution charging aperture 31;Described One effect heat exchanger 18 is provided with low pressure steam inlet 32;Described triple effect separation chamber 23 is provided with secondary and steams Vapor outlet 33;Described an effect heat exchanger the 18th, two effect heat exchangers 20 and three-effect heat exchanger 22 are all provided with It is equipped with condensation-water drain 34.
Operation principle of the present utility model and the course of work:
Commercial wet process purifying phosphoric acid is added continuously to DTB by phosphoric acid charging aperture 26 and dodges cooling crystallizer, Concentrated mother liquor is added continuously to DTB by concentrated mother liquor pump 25 simultaneously and dodges cooling crystallizer, dodge at DTB Realizing continuous neutralization reaction in cooling crystallizer, dodging cold crystallization, the indirect steam dodging cold crystallization generation passes through to dodge Cold steam outlet 27 is connected with vacuum system.Gained one-level potassium dihydrogen phosphate crystallization magma passes through one Level crystallization discharging pump 2 is delivered to OSLO cooler crystallizer continuously, and OSLO cooler crystallizer supernatant liquor leads to Cross crystallisation cycle pump 6 and be delivered to crystal external condensation device 4, after recirculated cooling water indirect heat exchange therein cooling, Being back to OSLO cooler crystallizer and carrying out crystallisation by cooling, two grades of potassium dihydrogen phosphate crystallization magmas of gained pass through two Level crystallization discharging pump 5 is delivered to thickener 7 and carries out stiff, and after stiff, magma is sent into centrifugal by high potential difference Machine 8 carries out solid-liquor separation, and the crystallization of separating obtained potassium dihydrogen phosphate is delivered to drying machine 9 and is dried, from Potassium dihydrogen phosphate product discharging opening 30 obtains final products, sends to screening and packaging.
By potassium dihydrogen phosphate mother liquor produced by OSLO cooler crystallizer, thickener 7 and centrifuge 8 Collect to mother liquor feeder 10, by mother liquor pump I 11, mother liquor is delivered to mother liquid disposal groove I 12, female Mother liquor in liquid treatment trough I 12 is delivered to mother liquid disposal groove II 13 after treatment and continues with, from hydrogen-oxygen Change potassium solution charging aperture 31 in mother liquid disposal groove II 13, add potassium hydroxide solution, then pass through mother liquor Pump II 14 is delivered to two groups of filter presses 15 and filters, and the clear mother liquor of gained introduces clear mother liquor storage tank 16.
Clear mother liquor in clear mother liquor storage tank 16 is delivered to an effect separation chamber 19, low pressure by clear mother liquor pump 17 Steam is entered an effect heat exchanger 18 by low pressure steam inlet 32 and concentrates, and an effect discharging enters two effects point From room 21, the indirect steam that an effect produces is discharged into two effect heat exchangers 20 by effect separation chamber 19 top, Two effect dischargings enter triple effect separation chamber 23, and the indirect steam that two effects produce is from two effect separation chamber 21 top rows Going out to enter three-effect heat exchanger 22, triple effect concentrated mother liquor out enters concentrated mother liquor storage tank 24, and triple effect produces Raw indirect steam is discharged from indirect steam mouth 33 and is connected with vacuum system, from concentrated mother liquor storage tank 24 Concentrated mother liquor out has joined DTB further through concentrated mother liquor pump 25 and has dodged in cooling crystallizer so that dense Contracting mother liquor achieves and recycles.

Claims (5)

1. the device with industry Wet Phosphoric Acid Market continuous potassium dihydrogen phosphate production, including one-level is dodged Cooling crystallizer (1), two grades of cooler crystallizers (3), thickener (7) and mother liquor feeder (10), its Be characterised by: one-level dodge cooling crystallizer (1) discharging opening by first degree crystalline discharging pump (2) with two grades The charging aperture connection of cooler crystallizer (3);It is provided with crystal external condensation device on two grades of cooler crystallizers (3) (4), both are connected by crystallisation cycle pump (6);The discharging opening of two grades of cooler crystallizers (3) passes through Secondary crystallization discharging pump (5) connects with the charging aperture of thickener (7);The discharging opening of thickener (7) Connect with the charging aperture of centrifuge (8), the charging of the discharging opening of centrifuge (8) and drying machine (9) Mouth connection;Mother liquor in two grades of cooler crystallizers (3), thickener (7) and centrifuge (8) leads to respectively Piping introduces mother liquor feeder (10);
Described mother liquor feeder (10) is by pipeline and mother liquid disposal groove I (12), mother liquid disposal groove II (13), filter press (15) and clear mother liquor storage tank (16) sequential communication;Mother liquor feeder (10) with Mother liquor pump I (11), mother liquid disposal groove II (13) and filter press are set between mother liquid disposal groove I (12) (15) mother liquor pump II (14) is set between;
Clear mother liquor storage tank (16) is connected with triple effect enrichment facility, and the effect in triple effect enrichment facility separates Room (19), two effects separation chamber (21) and triple effect separation chamber (23) sequential communication, each separation chamber is respectively It supporting is provided with heat exchanger;The clear mother liquor that clear mother liquor storage tank (16) is discharged is drawn by clear mother liquor pump (17) Entering an effect separation chamber (19), the discharging opening of triple effect separation chamber (23) is with concentrated mother liquor storage tank (24) even Logical, the discharging opening of concentrated mother liquor storage tank (24) dodges cooling crystallizer by concentrated mother liquor pump (25) with one-level (1) circulating mother liquor charging aperture connection.
2. industry Wet Phosphoric Acid Market continuous potassium dihydrogen phosphate production according to claim 1 Device, it is characterised in that: described one-level is dodged cooling crystallizer (1) and is provided with phosphoric acid charging aperture (26) Cold steam exhaust-gas mouth (27), dodges cold steam exhaust-gas mouth (27) and is connected with vacuum system with sudden strain of a muscle.
3. industry Wet Phosphoric Acid Market continuous potassium dihydrogen phosphate production according to claim 1 Device, it is characterised in that: described crystal external condensation device (4) be provided with recirculated water water inlet (28) with Recirculated water water return outlet (29).
4. industry Wet Phosphoric Acid Market continuous potassium dihydrogen phosphate production according to claim 1 Device, it is characterised in that: described mother liquid disposal groove II (13) is provided with potassium hydroxide solution charging aperture (31)。
5. industry Wet Phosphoric Acid Market continuous potassium dihydrogen phosphate production according to claim 1 Device, it is characterised in that: it is that DTB dodges cooling crystallizer that described one-level dodges cooling crystallizer (1), described Two grades of cooler crystallizers (3) be OSLO cooler crystallizer.
CN201620340069.3U 2016-04-21 2016-04-21 A kind of device of industry Wet Phosphoric Acid Market continuous potassium dihydrogen phosphate production Active CN205709872U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107188146A (en) * 2017-07-18 2017-09-22 禄丰天宝磷化工有限公司 A kind of production technology of feed grade potassium dihydrogen phosphate
CN109896893A (en) * 2019-03-15 2019-06-18 王新勇 A kind of high concentration fulvic acid potassium dihydrogen phosphate preparation method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107188146A (en) * 2017-07-18 2017-09-22 禄丰天宝磷化工有限公司 A kind of production technology of feed grade potassium dihydrogen phosphate
CN109896893A (en) * 2019-03-15 2019-06-18 王新勇 A kind of high concentration fulvic acid potassium dihydrogen phosphate preparation method

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