CN202246072U - Device for producing powdery monoammonium phosphate by using extract spent acid - Google Patents
Device for producing powdery monoammonium phosphate by using extract spent acid Download PDFInfo
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- CN202246072U CN202246072U CN2011203957632U CN201120395763U CN202246072U CN 202246072 U CN202246072 U CN 202246072U CN 2011203957632 U CN2011203957632 U CN 2011203957632U CN 201120395763 U CN201120395763 U CN 201120395763U CN 202246072 U CN202246072 U CN 202246072U
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- acid
- phosphoric acid
- pipeline
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- groove
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Abstract
The utility model discloses a device for producing powdery monoammonium phosphate by using extract spent acid, which comprises a wet process purification phosphoric acid extract spent acid tank, a diluted phosphoric acid storage tank, an ammoniation reactor, a slurry concentrator and a product spray dryer. An acid confection tank is arranged in front of the ammoniation reactor, the wet process purification phosphoric acid extract spent acid tank is connected with the acid confection tank through a pipeline, and a delivery pump and a gauge are arranged on the pipeline. The diluted phosphoric acid storage tank and the acid confection tank are connected through a pipeline, and a delivery pump and a gauge are arranged on the pipeline. The acid confection tank, the ammoniation reactor, the slurry concentrator and the product spray dryer are connected through a pipeline sequentially. The device for producing the powdery monoammonium phosphate by using the extract spent acid can effectively control product moisture in a production process, increases total nitrogen content in products, and is stable and reliable in work.
Description
Technical field
The utility model relates to the process unit of the by-product raffinate production powdery monoammonium phosphate of purification of wet process phosphoric acid.
Background technology
In the prior art, the purification process of phosphoric acid by wet process has had new development in recent years, and the phosphoric acid by wet process quality after the purification can be produced phosphoric acid with hot method and compared favourably, and production cost is lower, and the trend that replaces thermal phosphoric acid is arranged at industrial circle.In the liquid-liquid solvent extraction method purification of wet process phosphoric acid flow process that generally adopts at present, produce the sub product raffinate, F in the raffinate
-, SO
4 2-Reduce Deng anion-content, but enrichment the metallic cation in the phosphoric acid by wet process; Raffinate generally is used to make fertilizer, still, because of comparing with common phosphoric acid by wet process, because variation has taken place the content of foreign ion, causes the product total nitrogen content of chemical fertilizers production to reach reducing or problem that product moisture content exceeds standard when using raffinate to produce fertilizer.
Along with wet phosphoric acid purifying plant capacity extension, the raffinate amount constantly increases, digest these raffinates become the wet phosphoric acid purifying device can the quantity-produced important factor in order.
Utilize existing production equipment, directly produce powdery monoammonium phosphate with raffinate, because the content of metallic cations such as iron wherein, aluminium, magnesium is higher, and anion-contents such as fluorine, sulfate radical are lower; And the variation of impurity makes phosphor ammonium slurry viscosity become big, and the slip water cut after concentrating increases, and causes the difficult control of product moisture; Simultaneously; When positively charged ion was more in the phosphoric acid, the phosphor ammonium slurry degree of neutralization that acid records was higher than actual NH3/H3PO4 mol ratio, but the N/P of product is on the low side; Causing the product total nitrogen content not enough, can not be that the total nitrogen of product meets the demands even heighten phosphoric acid ammonification degree of neutralization.
Summary of the invention
To the weak point of prior art, the utility model aims to provide a kind of device that utilizes raffinate to produce powdery monoammonium phosphate, to solve the difficult control of product moisture, problems such as product total nitrogen content deficiency.
The technical scheme that the utility model adopts: a kind of device that utilizes raffinate to produce powdery monoammonium phosphate; Comprise wet purification phosphoric acid raffinate groove, dilute phosphoric acid storage tanks, ammoniation reactor, slip thickener, product spray-dryer; The complex acid groove was set before ammonia reactor; Wet purification phosphoric acid raffinate groove and complex acid groove are through pipe connection, and said pipeline is provided with transferpump and strapping table; Through pipe connection, and said pipeline is provided with transferpump and strapping table between dilute phosphoric acid storage tanks and the complex acid groove, and complex acid groove, ammoniation reactor, slip thickener, product spray-dryer are linked in sequence through pipeline.
Can know that from technique scheme utilize the complex acid groove to regulate through the complex acid with phosphoric acid by wet process and raffinate, the metal ion content in the raw material complex acid has reduced, thereby has improved the rerum natura of monoammonium phosphate slip, is convenient to production control; Simultaneously do not need excessively to improve phosphoric acid ammonification degree of neutralization, can make the product total nitrogen satisfy specification of quality.
The utility model can effectively be controlled product moisture in the production process, improves the product total nitrogen content, and working stability is reliable.
Description of drawings
Fig. 1 is the utility model structural representation;
In the accompanying drawing: 1 wet purification phosphoric acid raffinate groove, 2 dilute phosphoric acid storage tankss, 3 complex acid grooves, 4 ammoniation reactors, 5 slip thickeners, 6 product spray-dryers, 7 transferpumps, 8 strapping tables.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
As shown in Figure 1; A kind of device that utilizes raffinate to produce powdery monoammonium phosphate; Comprise wet purification phosphoric acid raffinate groove 1, dilute phosphoric acid storage tanks 2, ammoniation reactor 4, slip thickener 5, product spray-dryer 6; Before ammonia reactor 4, complex acid groove 3 is set, the size of groove 3: φ 11280, H=1000 are joined in acid
0,Wet purification phosphoric acid raffinate groove 1 passes through pipe connection with complex acid groove 3, and said pipeline is provided with transferpump 7 and strapping table 8; Through pipe connection, and said pipeline is provided with transferpump 7 and strapping table 8 between dilute phosphoric acid storage tanks 2 and the complex acid groove 3, and complex acid groove 3, ammoniation reactor 4, slip thickener 5, product spray-dryer 6 are linked in sequence through pipeline.
In the production process dilute phosphoric acid and raffinate are sent to complex acid groove 3 respectively, press P
2O
5Massfraction is about 40% raffinate and P
2O
5Massfraction is that about 25% dilute phosphoric acid carries out proportioning by 1:1-15 through corresponding strapping table 8 in complex acid groove 3, reduces cations, obtains mixed phosphate; With this mixed phosphate of ammonia neutralization, the reaction slurry degree of neutralization is brought up to 1.02～1.25 by 0.95～1.02 of original control again, increased the content of nitrogen in the product; Concentrate according to common process slurry reaction slurry afterwards, the drying of whitewashing is afterwards processed powdery monoammonium phosphate.
Claims (1)
1. device that utilizes raffinate to produce powdery monoammonium phosphate; Comprise wet purification phosphoric acid raffinate groove (1), dilute phosphoric acid storage tanks (2), ammoniation reactor (4), slip thickener (5), product spray-dryer (6); It is characterized in that: complex acid groove (3) is set before at ammonia reactor (4); Wet purification phosphoric acid raffinate groove (1) passes through pipe connection with complex acid groove (3), and said pipeline is provided with transferpump (7) and strapping table (8); Pass through pipe connection between dilute phosphoric acid storage tanks (2) and the complex acid groove (3); And said pipeline is provided with transferpump (7) and strapping table (8), and complex acid groove (3), ammoniation reactor (4), slip thickener (5), product spray-dryer (6) are linked in sequence through pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203957632U CN202246072U (en) | 2011-10-18 | 2011-10-18 | Device for producing powdery monoammonium phosphate by using extract spent acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203957632U CN202246072U (en) | 2011-10-18 | 2011-10-18 | Device for producing powdery monoammonium phosphate by using extract spent acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202246072U true CN202246072U (en) | 2012-05-30 |
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ID=46107345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203957632U Expired - Lifetime CN202246072U (en) | 2011-10-18 | 2011-10-18 | Device for producing powdery monoammonium phosphate by using extract spent acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202246072U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102431985A (en) * | 2011-10-18 | 2012-05-02 | 瓮福（集团）有限责任公司 | Device for producing powdery monoammonium phosphate by using extraction spent acid |
| CN102897731A (en) * | 2012-10-11 | 2013-01-30 | 瓮福（集团）有限责任公司 | Method for producing low-nutrient ammonium phosphate by utilizing water in phosphoric acid tank |
-
2011
- 2011-10-18 CN CN2011203957632U patent/CN202246072U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102431985A (en) * | 2011-10-18 | 2012-05-02 | 瓮福（集团）有限责任公司 | Device for producing powdery monoammonium phosphate by using extraction spent acid |
| CN102897731A (en) * | 2012-10-11 | 2013-01-30 | 瓮福（集团）有限责任公司 | Method for producing low-nutrient ammonium phosphate by utilizing water in phosphoric acid tank |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120530 |
|
| CX01 | Expiry of patent term |