CN104311163A - Device for reducing generation of biuret in urea ammonium nitrate solution industrial production process and application method thereof - Google Patents
Device for reducing generation of biuret in urea ammonium nitrate solution industrial production process and application method thereof Download PDFInfo
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- CN104311163A CN104311163A CN201410503680.9A CN201410503680A CN104311163A CN 104311163 A CN104311163 A CN 104311163A CN 201410503680 A CN201410503680 A CN 201410503680A CN 104311163 A CN104311163 A CN 104311163A
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- ammonium nitrate
- urea
- nitrate solution
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C1/00—Ammonium nitrate fertilisers
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
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Abstract
The invention provides a device for reducing generation of biuret in a urea ammonium nitrate solution industrial production process, which comprises a urea solution tank, a urea solution pump, a urea ammonium nitrate preparation tank, a urea ammonium nitrate solution pump, a cooler and a delivery pipeline, wherein the bottom of the urea solution tank is connected with an inlet of the urea solution pump through a pipeline; the urea solution pump is connected with an inlet of the urea ammonium nitrate preparation tank through the delivery pipeline; a heat tracing pipeline is arranged outside the delivery pipeline; the bottom of the urea ammonium nitrate preparation tank is connected with an inlet of the urea ammonium nitrate solution pump through a pipeline; the urea ammonium nitrate solution pump is connected with an inlet of the cooler through a pipeline; the pipeline between the ammonium nitrate solution pump and cooler is connected with a urea ammonium nitrate solution product discharge pipeline; and the cooler is connected with a top inlet of the urea ammonium nitrate preparation tank through a pipeline. The device optimizes the production control, reduces the generation of biuret, and effectively improves the product quality. The invention also provides an application method of the device.
Description
Technical field
The invention belongs to chemical fertilizer field, particularly relate to device and using method that industrial producing urea ammonium nitrate solution (UAN) reduces biuret generation.
Background technology
Urea saltpetre ammonium solution (Urea Ammonium Nitrate solution), being called for short UAN solution, abroad also referred to as nitrogen solution (N solution), is formulated by urea, ammonium nitrate and water.UAN solution is a kind of liquid nitrogenous fertilizer of stable, colourless, normal pressure.Because temperature is too high or the residence time is longer in industrial production, a certain amount of biuret can be generated.
Biuret (english abbreviation Bi) is the by product in urea production, and biuret molecular formula is C
2h
5n
3o
2.In UAN production process, if temperature controls too high, urea generation condensation reaction and generate Bi, during Bi too high levels, to the toxic effect of farm crop, to the germination of seed and growth all harmful,, foliar spray urea-base compound fertilizer extremely low at soil organic matter content is too much, Bi poisons the most serious, and Bi has perviousness, seed cell can be caused to dewater, suppress seed germination.Should 0.5% be no more than as Bi content in the urea of foliage top dressing.
Bi generates and generally produces under solution state, and there are immediate cause temperature and the residence time of its growing amount and urea soln.In UAN production process, when temperature is more than 120 DEG C, urea condensation reaction is accelerated, and biuret generates obviously, and when temperature is lower, turnout is little.Temperature is high, and the residence time is long, and Bi growing amount increases.If temperature is too low, can there is crystallization in urea soln, blocking pipeline, and production cannot be carried out.When UAN produces preparation, because urea soln temperature is at about 100-120 DEG C, if the insulation vapour pressure temperature and pressure of production is high, Bi growing amount increases obviously, generally can reach 0.5-1.5%, cause quality product defective.
Industrial production UAN, generally synchronously can carry out at ammonium nitrate and urea plant, urea line of pipes is longer, and urea residence time in line of pipes and UAN Preparation tank is longer, and the combined influence of high temperature and the residence time can cause Bi in UAN product to increase obviously.
Summary of the invention
For above-mentioned technical problem, the object of this invention is to provide the device that a kind of industrial producing urea ammonium nitrate solution reduces biuret generation, optimization production controls, and reduces the generation of biuret, effectively improves quality product.
The technical solution used in the present invention is:
A kind of industrial producing urea ammonium nitrate solution reduces the device that biuret generates, comprise urea soln groove, urea solution pump, urea ammonium nitrate Preparation tank, urea ammonium nitrate solution pump, water cooler and transfer line, described urea soln trench bottom is connected with the entrance of urea solution pump by pipeline, described urea solution pump is connected with urea ammonium nitrate Preparation tank entrance by transfer line, trace pipe road is provided with outside described transfer line, one end, described trace pipe road is connected with the condensate drainage pipe one being in series with valve one, the other end is connected with the condensate drainage pipe two being in series with valve two, described trace pipe road is the outer trace pipe road of steam or steam jacket trace pipe road, the tracing steam input tube that described trace pipe Lu Shangyu is in series with valve three is connected, be connected by the entrance of pipeline with urea ammonium nitrate solution pump bottom described urea ammonium nitrate Preparation tank, described urea ammonium nitrate solution pump is connected by the entrance of pipeline with described water cooler, pipeline between described urea ammonium nitrate solution pump and described water cooler is sent pipeline outside with urea ammonium nitrate solution product and is connected, described water cooler is connected by the top entry of pipeline with described urea ammonium nitrate Preparation tank.
Industrial producing urea ammonium nitrate solution of the present invention reduces the device that biuret generates, wherein, described urea soln trench bottom is provided with steam heating coil, and described steam heating coil one end is connected with heating steam intake line, the water of condensation of the other end discharged steam condensation.
Industrial producing urea ammonium nitrate solution of the present invention reduces the device that biuret generates, wherein, be provided with cooling water coil bottom described urea ammonium nitrate Preparation tank, described cooling water coil one end is connected with coolant intake pipe road, and the other end is connected with coolant outlet hose road.
Industrial producing urea ammonium nitrate solution of the present invention reduces the device that biuret generates, wherein, the part of described transfer line between one end to described urea solution pump, described trace pipe road is provided with valve four, the part of described transfer line between the described trace pipe road the other end to described urea ammonium nitrate Preparation tank is provided with valve five, the part of described transfer line between one end, described trace pipe road to described valve four is connected by the entrance of pipeline with described urea soln groove top, the part of described transfer line between the described trace pipe road the other end to described valve five is connected with the input tube that purges steam being in series with valve six.
Industrial producing urea ammonium nitrate solution of the present invention reduces the device that biuret generates, wherein, the sidewall of described urea soln groove and described urea ammonium nitrate Preparation tank is separately installed with thermometer one and thermometer two, described transfer line is provided with thermometer three, the pipeline between described water cooler and described urea ammonium nitrate Preparation tank is provided with thermometer four.
Industrial producing urea ammonium nitrate solution reduces a using method for the device that biuret generates, comprises the following steps:
A () opens the heating steam be connected with described steam heating coil, open the tracing steam be connected with described transfer line;
B () opens the water coolant of described cooling water coil, open the water coolant of water cooler, and it is qualified that cooling system runs;
(c) by preparation qualified after urea soln put into the groove of urea soln described in step (a), open urea solution pump, described urea soln is delivered to described urea ammonium nitrate Preparation tank, liquid ammonium nitrate solution is joined described urea ammonium nitrate Preparation tank simultaneously;
D () opens urea ammonium nitrate solution pump, through the circulation temperature lowering of water cooler described in step (b);
E ammonium nitrate solution has been prepared in () described urea ammonium nitrate Preparation tank after, deliver to tank area by outside qualified urea ammonium nitrate solution product.
Industrial producing urea ammonium nitrate solution of the present invention reduces the using method of the device that biuret generates, wherein, control temperature is at 90-100 DEG C in described urea soln groove for urea soln described in step (a), and the urea soln temperature in transfer line is at 80-90 DEG C.
Industrial producing urea ammonium nitrate solution of the present invention reduces the using method of the device that biuret generates, and wherein, tracing steam described in step (a) adopts vapor pressure to be 0.2-0.3MPa, and temperature is 120-130 DEG C; The vapor pressure that described steam heating coil adopts is 0.2-0.3Mpa, temperature 120-130 DEG C.
Industrial producing urea ammonium nitrate solution of the present invention reduces the using method of the device that biuret generates, and wherein, urea concentration described in step (c) is 68-78%, and described liquid ammonium nitrate solution temperature is at 150-160 DEG C.
Industrial producing urea ammonium nitrate solution of the present invention reduces the using method of the device that biuret generates, wherein, in described step (e), the preparation of urea ammonium nitrate solution adopts interval preparation, by when delivering to tank area outside urea ammonium nitrate solution product, the liquid level of each reservation about 20% in described urea ammonium nitrate Preparation tank.
Beneficial effect of the present invention:
Industrial producing urea ammonium nitrate solution of the present invention reduces the device that biuret generates, and by being provided with trace pipe road outside line of pipes, urea not easily condensation reaction occurs, and reduces the generation of biuret, and prevents urea soln crystallization, blocking transfer line.Be provided with water cooler in the outlet of UAN solution pump, lowered the temperature by heat exchange, generate Bi under avoiding high temperature and overstand situation, thus optimize production control, reduce the generation of biuret, effectively improve quality product.
Industrial producing urea ammonium nitrate solution of the present invention reduces the device that biuret generates, and by urea soln trench bottom design steam heating coil, prevents temperature too low urea soln generation crystallization, decreases the generation of biuret.
Industrial producing urea ammonium nitrate solution of the present invention reduces the device that biuret generates, and by designing the cooling water coil of cooling in ammonium nitrate solution groove, cooling water coil and water cooler, twice heat exchange is lowered the temperature, and effectively reduces the generation of Bi;
Industrial producing urea ammonium nitrate solution of the present invention reduces the device that biuret generates, and by increasing blowback steam at urea soln transfer line, urea blowback in pipeline reclaimed when stopping producing, prevent urea continuous heating, the residence time is long, and generating Bi increases; On the other hand, the urea soln blowback in line of pipes can be got back to urea soln groove, prevent line temperature from declining, cause urea crystals blocking pipeline.
Industrial producing urea ammonium nitrate solution of the present invention reduces the device that biuret generates, thermometer one and thermometer two is separately installed with by the sidewall of described urea soln groove and described urea ammonium nitrate Preparation tank, described transfer line is provided with thermometer three, pipeline between described water cooler and described urea ammonium nitrate Preparation tank is provided with thermometer four, the amount of heating steam and tracing steam can be adjusted in time, adjust urea soln temperature in urea soln groove and transfer line in time.
Industrial producing urea ammonium nitrate solution of the present invention reduces the using method of the device that biuret generates, and technique is simple, meets industrial needs, and effectively can reduce the generation of biuret.
Industrial producing urea ammonium nitrate solution of the present invention reduces the using method of the device that biuret generates, and tracing steam described in step (a) adopts vapor pressure to be 0.2-0.3MPa, and temperature is 120-130 DEG C; The vapor pressure that described steam heating coil adopts is 0.2-0.3Mpa, temperature 120-130 DEG C, by adopting the tracing steam design that temperature is low, pressure is low, makes Bi in urea ammonium nitrate solution product decline obviously, in product, Bi index is less than less than 0.4%, decreases the generation of biuret.
Industrial producing urea ammonium nitrate solution of the present invention reduces the using method of the device that biuret generates, by preparing urea ammonium nitrate solution at every turn, complete when sending urea ammonium nitrate solution outside, the qualified urea ammonium nitrate solution of 20% is retained in urea ammonium nitrate solution groove, mixing solutions temperature can be remained on the low temperature of 60-80 DEG C, biuret productivity declines obviously.
Accompanying drawing explanation
Fig. 1 is the structural representation that industrial producing urea ammonium nitrate solution of the present invention reduces the device that biuret generates.
In figure: 1, urea soln groove; 2, urea solution pump; 3, UAN Preparation tank; 4, UAN solution pump; 5, water cooler; 6, transfer line; 7, trace pipe road; 8, valve one; 9, valve three; 10, steam heating coil; 11, cooling water coil; 12, valve four; 13, valve five; 14, valve six; 15, thermometer one; 16, thermometer two; 17, thermometer three; 18, thermometer four; 19, valve two.
Below with reference to drawings and Examples, the present invention is described in detail.
Embodiment
As shown in Figure 1, a kind of industrial producing urea ammonium nitrate solution reduces the device that biuret generates, comprise urea soln groove 1, urea solution pump 2, UAN Preparation tank 3, UAN solution pump 4, water cooler 5 and transfer line 6, be connected by the entrance of pipeline with urea solution pump 2 bottom urea soln groove 1, urea solution pump 2 is connected with UAN Preparation tank 3 entrance by transfer line 6, trace pipe road 7 is provided with outside transfer line 6, one end, trace pipe road 7 is connected with the condensate drainage pipe one being in series with valve 1, the other end is connected with the condensate drainage pipe two being in series with valve 2 19, trace pipe road 7 is the outer trace pipe road of steam, trace pipe road 7 is connected with the tracing steam intake line being in series with valve 39, be connected by the entrance of pipeline with UAN solution pump 4 bottom UAN Preparation tank 3, UAN solution pump 4 is connected by the entrance of pipeline with water cooler 5, pipeline between UAN solution pump 4 and water cooler 5 is sent pipeline outside with UAN solution product and is connected, water cooler 5 is connected with UAN Preparation tank 3 top entry by pipeline, steam heating coil 10 is provided with bottom urea soln groove 1, steam heating coil 10 one end is connected with heating steam intake line, the water of condensation of the other end discharged steam condensation, cooling water coil 11 is provided with bottom UAN Preparation tank 3, cooling water coil 11 one end is connected with coolant intake pipe road, the other end is connected with coolant outlet hose road, the part of transfer line 6 between one end, trace pipe road 7 to urea solution pump 2 is provided with valve 4 12, the part of transfer line 6 between one end, trace pipe road 7 to valve 4 12 is connected by the entrance of pipeline with urea soln groove 1 top, the part of transfer line 6 between trace pipe road 7 the other end to UAN Preparation tank 3 is provided with valve 5 13, the part of transfer line 6 between trace pipe road 7 the other end to valve 5 13 is connected with the intake line that purges steam being in series with valve 6 14, the sidewall of urea soln groove 1 and UAN Preparation tank 3 is separately installed with thermometer 1 and thermometer 2 16, transfer line 6 is provided with thermometer 3 17, pipeline between water cooler 5 and UAN Preparation tank 3 is provided with thermometer 4 18.
The present embodiment industrial producing urea ammonium nitrate solution reduces the using method of the device that biuret generates, and comprises the following steps:
A () opens the heating steam be connected with steam heating coil 10, the pressure of heating steam is 0.2Mpa, temperature is 120 DEG C, open the tracing steam be connected with transfer line 6, the pressure of tracing steam is 0.2MPa, temperature is 120 DEG C, and control temperature is at 90-100 DEG C in urea soln groove 1 for urea soln, and the urea soln temperature in transfer line 6 is at 80-90 DEG C;
B () opens the water coolant of cooling water coil 11, open water cooler 5 water coolant, and it is qualified that cooling system runs;
C the urea soln of 75% concentration after qualified for preparation is put into the groove of urea soln described in step (a) 1, thermometer 1 displays temperature 90 DEG C by (); Open urea solution pump 2, total amount 50 tons of urea solns are delivered to the UAN Preparation tank 3 that volume is 100m3,150 DEG C of liquid ammonium nitrate solution 50 tons is joined UAN Preparation tank 3, now simultaneously, on transfer line 6, thermometer 3 17 shows 88 DEG C, and on UAN Preparation tank 3, thermometer 4 18 shows 115 DEG C;
D () opens UAN solution pump 4, after the cooling of water cooler 5 described in step (b), UAN solution temperature is 75 DEG C, circulation temperature lowering; In UAN Preparation tank 3, temperature is cooled to 50 DEG C gradually at 115 DEG C, 100 tons of ammonium nitrate solution temperature fall times about 40 minutes;
E in () described UAN Preparation tank 3, ammonium nitrate solution has been prepared after, tank area is delivered to by outside qualified UAN solution product, UAN solution preparation adopts interval preparation, by when delivering to tank area outside UAN solution product, the liquid level of each reservation about 20% in UAN Preparation tank 3, this liquid level temperature is 40-50 DEG C.
Sampling analysis UAN solution product, test-results shows that Bi content is 0.32%, and in product, Bi index is less than less than 0.4%, meets industrial needs, decreases the generation of biuret.
Embodiment 2
Distinguish with embodiment 1 and be: tracing steam described in step (a) adopts vapor pressure to be 0.3MPa, and temperature is 130 DEG C; The vapor pressure that described steam heating coil adopts is 0.3Mpa, and temperature is 130 DEG C; Urea concentration described in step (c) is 68%, and described liquid ammonium nitrate solution temperature is at 160 DEG C.
Sampling analysis UAN solution product, in product, Bi index is less than less than 0.4%.
Embodiment 3
Distinguish with embodiment 1 and be: trace pipe road 7 is steam jacket trace pipe road, and urea concentration described in step (c) is 68%.
Sampling analysis UAN solution product, in product, Bi index is less than less than 0.4%.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (10)
1. the device of industrial producing urea ammonium nitrate solution minimizing biuret generation, it is characterized in that: comprise urea soln groove (1), urea solution pump (2), urea ammonium nitrate Preparation tank (3), urea ammonium nitrate solution pump (4), water cooler (5) and transfer line (6), described urea soln groove (1) bottom is connected by the entrance of pipeline with urea solution pump (2), described urea solution pump (2) is connected with urea ammonium nitrate Preparation tank (3) entrance by transfer line (6), trace pipe road (7) is provided with outside described transfer line (6), described trace pipe road (7) one end is connected with the condensate drainage pipe one being in series with valve one (8), the other end is connected with the condensate drainage pipe two being in series with valve two (19), described trace pipe road (7) is the outer trace pipe road of steam or steam jacket trace pipe road, described trace pipe road (7) is upper to be connected with the tracing steam input tube being in series with valve three (9), described urea ammonium nitrate Preparation tank (3) bottom is connected by the entrance of pipeline with urea ammonium nitrate solution pump (4), described urea ammonium nitrate solution pump (4) is connected by the entrance of pipeline with described water cooler (5), pipeline between described urea ammonium nitrate solution pump (4) and described water cooler (5) is sent pipeline outside with urea ammonium nitrate solution product and is connected, described water cooler (5) is connected with described urea ammonium nitrate Preparation tank (3) top entry by pipeline.
2. industrial producing urea ammonium nitrate solution according to claim 1 reduces the device that biuret generates, it is characterized in that: described urea soln groove (1) bottom is provided with steam heating coil (10), described steam heating coil (10) one end is connected with heating steam intake line, the water of condensation of the other end discharged steam condensation.
3. industrial producing urea ammonium nitrate solution according to claim 2 reduces the device that biuret generates, it is characterized in that: described urea ammonium nitrate Preparation tank (3) bottom is provided with cooling water coil (11), described cooling water coil (11) one end is connected with coolant intake pipe road, and the other end is connected with coolant outlet hose road.
4. industrial producing urea ammonium nitrate solution according to claim 3 reduces the device that biuret generates, it is characterized in that: the part that described transfer line (6) is positioned between described trace pipe road (7) one end to described urea solution pump (2) is provided with valve four (12), the part that described transfer line (6) is positioned between described trace pipe road (7) the other end to described urea ammonium nitrate Preparation tank (3) is provided with valve five (13), the part that described transfer line (6) is positioned between described trace pipe road (7) one end to described valve four (12) is connected by the entrance of pipeline with described urea soln groove (1) top, the part that described transfer line (6) is positioned between described trace pipe road (7) the other end to described valve five (13) is connected with the input tube that purges steam being in series with valve six (14).
5. industrial producing urea ammonium nitrate solution according to claim 4 reduces the device that biuret generates, it is characterized in that: described urea soln groove (1) and described urea ammonium nitrate Preparation tank (3) sidewall are separately installed with thermometer one (15) and thermometer two (16), described transfer line (6) is provided with thermometer three (17), the pipeline between described water cooler (5) and described urea ammonium nitrate Preparation tank (3) is provided with thermometer four (18).
6. industrial producing urea ammonium nitrate solution according to claim 5 reduces the using method of the device that biuret generates, and it is characterized in that: comprise the following steps:
A () opens the heating steam be connected with described steam heating coil (10), open the tracing steam be connected with described transfer line (6);
B () opens the water coolant of described cooling water coil (11), open the water coolant of water cooler (5), and it is qualified that cooling system runs;
(c) by preparation qualified after urea soln put into the groove of urea soln described in step (a) (1), open urea solution pump (2), described urea soln is delivered to described urea ammonium nitrate Preparation tank (3), liquid ammonium nitrate solution is joined described urea ammonium nitrate Preparation tank (3) simultaneously;
D () opens urea ammonium nitrate solution pump (4), through water cooler described in step (b) (5) circulation temperature lowering;
E ammonium nitrate solution has been prepared in () described urea ammonium nitrate Preparation tank (3) after, deliver to tank area by outside qualified urea ammonium nitrate solution product.
7. industrial producing urea ammonium nitrate solution according to claim 6 reduces the using method of the device that biuret generates, it is characterized in that: control temperature is at 90-100 DEG C in described urea soln groove (1) for urea soln described in step (a), and the urea soln temperature in transfer line (6) is at 80-90 DEG C.
8. industrial producing urea ammonium nitrate solution according to claim 6 reduces the using method of the device that biuret generates, it is characterized in that: tracing steam described in step (a) adopts vapor pressure to be 0.2-0.3MPa, temperature is 120-130 DEG C, the vapor pressure that described steam heating coil (10) adopts is 0.2-0.3Mpa, temperature 120-130 DEG C.
9. industrial producing urea ammonium nitrate solution according to claim 6 reduces the using method of the device that biuret generates, it is characterized in that: urea concentration described in step (c) is 68-78%, described liquid ammonium nitrate solution temperature is at 150-160 DEG C.
10. the industrial producing urea ammonium nitrate solution according to claim 6-9 any one reduces the using method of the device that biuret generates, it is characterized in that: in described step (e), the preparation of urea ammonium nitrate solution adopts interval preparation, by when delivering to tank area outside urea ammonium nitrate solution product, the liquid level of each reservation about 20% in described urea ammonium nitrate Preparation tank (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410503680.9A CN104311163B (en) | 2014-09-26 | Industrial producing urea ammonium nitrate solution reduces device and the using method that biuret generates |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410503680.9A CN104311163B (en) | 2014-09-26 | Industrial producing urea ammonium nitrate solution reduces device and the using method that biuret generates |
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| Publication Number | Publication Date |
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| CN104311163A true CN104311163A (en) | 2015-01-28 |
| CN104311163B CN104311163B (en) | 2017-01-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116102A (en) * | 2015-06-17 | 2015-12-02 | 安徽淮化股份有限公司 | Multifunctional on-line analysis and recovery apparatus for urea ammonium nitrate solution |
| CN113101682A (en) * | 2021-05-28 | 2021-07-13 | 新疆心连心能源化工有限公司 | Device for reducing evaporation of condensation compound and stabilizing urea production and treatment method |
| CN114247363A (en) * | 2021-12-31 | 2022-03-29 | 河南豫能天蓝环保有限公司 | Integrated automobile-used urea blending system |
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| CN103664241A (en) * | 2013-12-16 | 2014-03-26 | 上海锦意实业有限公司 | Preparation process for urea ammonium nitrate solution |
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| CN88102543A (en) * | 1988-04-28 | 1988-12-14 | 湖北省沙洋农场化肥厂 | Binder for granulated compound fertilizer and manufacturing process thereof and equipment |
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| CN105116102A (en) * | 2015-06-17 | 2015-12-02 | 安徽淮化股份有限公司 | Multifunctional on-line analysis and recovery apparatus for urea ammonium nitrate solution |
| CN113101682A (en) * | 2021-05-28 | 2021-07-13 | 新疆心连心能源化工有限公司 | Device for reducing evaporation of condensation compound and stabilizing urea production and treatment method |
| CN114247363A (en) * | 2021-12-31 | 2022-03-29 | 河南豫能天蓝环保有限公司 | Integrated automobile-used urea blending system |
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