CN104557153B - A kind of combined production device of granular urea and UAN liquid urea - Google Patents
A kind of combined production device of granular urea and UAN liquid urea Download PDFInfo
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- CN104557153B CN104557153B CN201410832095.3A CN201410832095A CN104557153B CN 104557153 B CN104557153 B CN 104557153B CN 201410832095 A CN201410832095 A CN 201410832095A CN 104557153 B CN104557153 B CN 104557153B
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- urine
- flash
- liquid
- heater
- separator
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Classifications
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
Abstract
The present invention relates to a kind of granular urea and the combined production device of UAN liquid ureas, including flash system and evaporation prilling system, the flash system includes：Flash heater, flash separator, urine groove, urine relay pump and urine buffer groove；Urine from low pressure both can independently produce granular urea or the liquid urea of concentration needed for for producing UAN under the device of the present invention, two kinds of products can be produced simultaneously again, production cost is greatly reduced, product structure is more rationalized regulation, the demand in market is met.
Description
Technical field
The present invention relates to technical field of urea production, and in particular to a kind of coproduction dress of granular urea and UAN liquid urea
Put.
Background technology
UAN is a kind of without pressure nitrogenous fertilizer solution.It is ammonium nitrate respectively by 68%-75% urea liquid and 75%-95%
Then solution and anti-corrosion reagent mix, cooling is obtained by metering.At this stage due to the production capacity surplus of solid urea and ammonium nitrate,
Recessed market, causes granular urea product price to glide, there is vast potential for future development in market to UAN abroad, needs whereby
One kind can produce UAN liquid nitrogen fertilizer, and the device of granular urea can be produced again to reduce plant produced cost, makes the product of factory
Variation, strengthens the competitiveness of enterprise.
, can only output granular urea and certain density using existing liquid structure device in actual production
One kind of liquid urea solution, qualified granular urea and the liquid urea of required concentration to produce simultaneously, it is desirable to have
Each different production lines, invests big, cost height, and be unfavorable for the centralized management of production.Due to UAN liquid nitrogen fertilizer and particle urine
The fluctuation of plain price, it is necessary to which the moment is adjusted to the structure of two kinds of products, while also to ensure that the quality of granular urea reaches
Mark, to meet the requirement in market；The concentration of liquid urea is according to circumstances adjusted again, to reduce UAN production cost.
If above-mentioned the problem of can not be resolved, enterprise can not allow product structure to rationalize, and chain of driving the industry enters
OK, and then company's Benefit Drops are caused.
The content of the invention
The technical problem to be solved in the present invention be to overcome above-mentioned the deficiencies in the prior art there is provided a kind of granular urea and
The combined production device of UAN liquid ureas, realization can individually produce the liquid urea of granular urea or required concentration, can not subtract again
The effect of coproduction granular urea and the liquid urea of required concentration in the case of load, realizes the rationalization of enterprise product structure,
The maximization generated profit.
To solve the above problems, design is adopted the following technical scheme that：
A kind of combined production device of granular urea and UAN liquid urea, including flash system and evaporation prilling system, the sudden strain of a muscle
Steaming system includes：Flash heater, flash separator, urine groove, urine relay pump and urine buffer groove, the flash distillation heating
The entrance point of device is connected with urine conveyance tube road, and the fluid inlet end of the port of export of flash heater and the flash separator connects
Connect, urine accident room and urine fresh keeping chamber are divided into the urine groove, fluid inlet end and the flash distillation of the flash separator add
The port of export connection of hot device, the pipeline at the gaseous phase outlet end of flash separator is provided with pressure-regulating valve；The flash separator
Liquid-phase outlet end be divided into two-way, be connected all the way by the first stop valve with evaporation prilling system, another road pass through second cut-off
Valve is connected with the entrance point of urine fresh keeping chamber；The port of export of the urine fresh keeping chamber is connected with the entrance point of urine relay pump, institute
The port of export for stating urine relay pump is divided into three tunnels, is connected all the way by the first regulating valve with evaporation prilling system, passes through all the way
Two regulating valves are connected with urine buffer groove, and the entrance point with urine accident room is connected all the way.
Further, the evaporation prilling system include be sequentially connected one section of flash vaporization heater, one section evaporation separation
Device, dual circulation flash heater, dual circulation separator, Melting pump and granulation tower, the liquid of one section of vapor seperator
Phase entrance point is divided into two-way, is connected all the way with the liquid-phase outlet end of flash separator by the first stop valve, all the way with relay pump
The port of export connected by the first regulating valve.
Further, the gaseous phase outlet end of the flash separator is connected with flash distillation surface cooler.
Further, the port of export of the urine accident room is connected by the entrance point of urine groove recovery pump and flash heater
Connect.
Further, the urine accident room in the urine groove is separated with urine fresh keeping chamber by dividing plate.
The beneficial effects of the present invention are：Urea liquid from low pressure is entered flash separator and dodged by the present invention
Steam, by controlling the temperature of flash heater, and adjust using the pressure-regulating valve of flash separator gaseous phase outlet flash distillation
Vacuum in separator, so that the urine concentration into urine fresh keeping chamber is adjusted, to reach required for the fertilizer configuration of UAN liquid nitrogen
Concentration；Urine in urine fresh keeping chamber is partly delivered to evaporation prilling system, controlled by the first regulating valve by urine relay pump
System enters the amount of evaporation, and granulation is gone after evaporation and concentration；The storage of urine buffer groove is delivered in part, for configuring UAN liquid nitrogen fertilizer, leads to
The second regulating valve is crossed to control flow, and urine fresh keeping chamber liquid level, prevent flash separator vacuum breaker；Driving initial stage or thing
Therefore when, urine accident room can be delivered to by urine relay pump by-pass, is reclaimed and pumped by the urine being connected with urine accident room
Flash heater is returned to recycle.
The liquid urea of concentration needed for the present invention can individually produce granular urea or UAN, again can not load shedding feelings
Coproduction granular urea and the liquid urea of required concentration, reduce production cost, improve production efficiency under condition, realize that enterprise produces
The Reasonable adjustment of product structure, to adapt to the demand in market；Design makes urine enter evaporation prilling system by urine relay pump simultaneously
The punishment in advance of system is stable, reduces the generation of biuret, improves the quality of product.
Brief description of the drawings
Just the embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings, wherein：
Fig. 1 is the structural representation of the present invention.
Embodiment
The combined production device of a kind of granular urea and UAN liquid ureas shown in reference picture 1, including flash system and evaporation are made
Grain system, the flash system includes：Flash heater 5, flash separator 4, urine groove, urine relay pump 17 and urine are slow
Jet-bedding 11, the entrance point of flash heater 5 is connected with urine conveyance tube road 21, the port of export of flash heater 5 and the flash distillation
The fluid inlet end connection of separator 4, urine groove can utilize original urine groove equipment, dividing plate 3 only need to be set in urine groove
Urine accident room 1 and urine fresh keeping chamber 2 are classified as, without increasing equipment；The fluid inlet end of flash separator 4 adds with flash distillation
The port of export connection of hot device 5, the pipeline at the gaseous phase outlet end of flash separator 4 is provided with pressure-regulating valve 14 and connects flash distillation table
Cooler 6, the gas phase for condensing flash distillation.
Evaporation prilling system includes the one section of flash vaporization heater 7, one section of vapor seperator 8, two sections of steamings being sequentially connected
Send out flash heater 9, dual circulation separator 10, Melting pump 18 and granulation tower 19.
The liquid-phase outlet end of flash separator 4 is divided into two-way, and a-road-through is connected with one section of flash vaporization heater 7, another
Road is connected with the entrance point of urine fresh keeping chamber 2；The port of export of urine fresh keeping chamber 2 is connected with the entrance point of urine relay pump 17, urine
The port of export of liquid relay pump 12 is divided into three tunnels, is connected, connects all the way with urine buffer groove 11 with one section of flash vaporization heater 7 all the way
Connect, the entrance point with urine accident room 1 is connected all the way, is used as by-pass, when urea concentration is unqualified, the by-pass can be used
Enter line replacement；The port of export of urine accident room 1 is connected by urine groove recovery pump 20 with the entrance point of flash heater 5.
In order that 4 times liquid of flash separator enter urine fresh keeping chamber 2, in flash separator 4 between urine fresh keeping chamber 2
Set on pipeline and set first on the second stop valve 16, flash separator 4 to the pipeline between one section of flash vaporization heater 7 of urine
Stop valve 15, to facilitate the switching of 4 times liquid of flash separator.
In order to be adjusted into the amount of urine of one section of flash vaporization heater 7, the outlet of urine relay pump 17 and one section of evaporation
The first regulating valve 13 is provided between flash heater 7, to control the amount of urine into evaporation prilling system, so as to control particle to urinate
The amount of element；The second regulating valve 12 is provided between urine relay pump 17 and urine buffer groove 11, to control the liquid of urine fresh keeping chamber 2
Position, it is ensured that flash separator 4 will not vacuum breaker.
The specific work process of the present invention is as follows：
1st, the urea liquid needed for UAN is individually produced：
Second stop valve 16 of 4 times liquid of flash separator is opened, the first cut-off for removing one section of flash vaporization heater is closed
Valve 15, it is 102 DEG C that temperature in flash separator is controlled by flash heater 5 and pressure-regulating valve 14, pressure for-
18Kpa, the urea liquid after flash distillation enters urine fresh keeping chamber 2 under gravity, in order to prevent vacuum breaker in advance in urine
The water of fresh keeping chamber filling 5%, then starts urine relay pump 17 and sends into urine groove accident room 1, enters line replacement, it is qualified after
66%-75% urea liquid is sent to urine buffer groove 11 by the second regulating valve 12 and stored, for configuration UAN liquid nitrogen
Fertilizer.
2nd, granular urea is individually produced：
Mode one：The first stop valve 15 for opening 4 times liquid of flash separator closes the second stop valve for removing urine fresh keeping chamber
16,4 times liquid of flash separator is directly entered evaporation prilling system, and controlled by flash heater 5 and pressure-regulating valve 14
The temperature and pressure of the system flash distillation corresponding with compressor load in evaporation prilling system, finally go granulation.
Mode two：The second stop valve 16 closing for opening 4 time liquid of flash separator goes the of one section of flash vaporization heater 7
One stop valve 15, it is 102 DEG C, pressure that the temperature in flash separator is controlled by flash heater 5 and pressure-regulating valve 14
For -28Kpa, the urea liquid into urine fresh keeping chamber 2 delivers to one section of flash vaporization heater 7 by urine relay pump 17 again,
Controlled to enter the urea liquid flow of evaporation prilling system with the first regulating valve 13, finally granulated.
3rd, coproduction granular urea and UAN liquid ureas：
The stop valve 16 of 4 times liquid of flash separator is opened, the first stop valve for removing one section of flash vaporization heater 7 is closed
15, it is 102 DEG C that the temperature in flash separator is controlled by flash heater 5 and pressure-regulating valve 14, and pressure is -18Kpa,
Urea liquid after flash distillation enters urine fresh keeping chamber 2 under gravity, to prevent vacuum breaker from should shift to an earlier date in urine fresh keeping chamber
The water of interior filling 5%, then starts urine relay pump 17 and sends into urine accident room 1, enter line replacement, urea concentration is qualified
Afterwards, part feeding urine buffer groove 11, for configuring UAN, one section of flash vaporization heater 7 is sent into part, passes through the first regulation
Valve 13 controls to enter the amount of one section of flash vaporization heater 7, and adjusted according to the load of system one section, dual circulation it is true
Reciprocal of duty cycle and pressure, deliver to granulation tower 19 finally by Melting pump 18 and granulate.
It is described above, it is only the present invention preferably embodiment, but the scope of the present invention is not limited thereto, it is any
Those familiar with the art is in the technical scope of present disclosure, the change or replacement that can be readily occurred in, and all should
It is included within the scope of the present invention.Therefore the scope of the present invention is defined by the protection domain of claims.
Claims (4)
1. the combined production device of a kind of granular urea and UAN liquid ureas, including flash system and evaporation prilling system, its feature exist
In the flash system includes：Flash heater, flash separator, urine groove, urine relay pump and urine buffer groove, institute
The entrance point for stating flash heater is connected with urine conveyance tube road, the liquid of the port of export of flash heater and the flash separator
Phase entrance point is connected, and is divided into urine accident room and urine fresh keeping chamber, the fluid inlet of the flash separator in the urine groove
End is connected with the port of export of flash heater, and the pipeline at the gaseous phase outlet end of flash separator is provided with pressure-regulating valve；It is described
The liquid-phase outlet end of flash separator is divided into two-way, is connected all the way by the first stop valve with evaporation prilling system, another a-road-through
The entrance point that the second stop valve is crossed with urine fresh keeping chamber is connected；The port of export of the urine fresh keeping chamber and the import of urine relay pump
End connection, the port of export of the urine relay pump is divided into three tunnels, is connected all the way by the first regulating valve with evaporation prilling system, one
Road is connected by the second regulating valve with urine buffer groove, and the entrance point with urine accident room is connected all the way；The evaporation prilling system
System include be sequentially connected one section of flash vaporization heater, one section of vapor seperator, dual circulation flash heater, dual circulation
Separator, Melting pump and granulation tower, the fluid inlet end of one section of vapor seperator are divided into two-way, all the way with flash separation
The liquid-phase outlet end of device is connected by the first stop valve, is connected all the way with the port of export of relay pump by the first regulating valve.
2. the combined production device of a kind of granular urea according to claim 1 and UAN liquid ureas, it is characterised in that described
The gaseous phase outlet end of flash separator is connected with flash distillation surface cooler.
3. the combined production device of a kind of granular urea according to claim 1 and UAN liquid ureas, it is characterised in that described
The port of export of urine accident room is connected by the entrance point of urine groove recovery pump and flash heater.
4. the combined production device of a kind of granular urea according to claim 1 and UAN liquid ureas, it is characterised in that described
Urine accident room in urine groove is separated with urine fresh keeping chamber by dividing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410832095.3A CN104557153B (en) | 2014-12-29 | 2014-12-29 | A kind of combined production device of granular urea and UAN liquid urea |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410832095.3A CN104557153B (en) | 2014-12-29 | 2014-12-29 | A kind of combined production device of granular urea and UAN liquid urea |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104557153A CN104557153A (en) | 2015-04-29 |
| CN104557153B true CN104557153B (en) | 2017-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410832095.3A Active CN104557153B (en) | 2014-12-29 | 2014-12-29 | A kind of combined production device of granular urea and UAN liquid urea |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106187328A (en) * | 2016-07-07 | 2016-12-07 | 安徽淮化股份有限公司 | A kind of method and apparatus that defective urea product is dissolved loopback pelletize again |
| CN109078570A (en) * | 2018-08-24 | 2018-12-25 | 江西鹏腾实业有限公司 | A kind of continuous evaporation drying and granulating equipment |
| CN111574410A (en) * | 2020-06-09 | 2020-08-25 | 青海盐湖工业股份有限公司 | Combined production system of urea and biurea |
| CN113582882A (en) * | 2021-07-28 | 2021-11-02 | 安徽晋煤中能化工股份有限公司 | Method for reducing biuret content in industrial urea and production device thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54119416A (en) * | 1978-03-09 | 1979-09-17 | Mitsui Toatsu Chem Inc | Preparation of guanidine carbonate or other guanidine salt |
| CN1426981A (en) * | 2001-12-21 | 2003-07-02 | 中国科学院沈阳应用生态研究所 | Production technology of compound long active urea and its special equipment |
| CN201525815U (en) * | 2009-09-30 | 2010-07-14 | 宁波金远东工业科技有限公司 | Device for preparing urea by utilizing aqueous solution total recycle process |
| CN201908052U (en) * | 2010-12-17 | 2011-07-27 | 安徽三星化工有限责任公司 | Preparation device for sustained slow-release fertilizer |
| CN202151510U (en) * | 2011-06-16 | 2012-02-29 | 重庆禾丰化工股份有限公司 | Energy-saving urea evaporating device |
| CN103804055B (en) * | 2014-02-24 | 2016-06-29 | 华强化工集团股份有限公司 | Sulfur-bearing, potassium, the highly effective carbamide fertilizer and preparation method thereof of zinc, device and application |
| CN204385074U (en) * | 2014-12-29 | 2015-06-10 | 安徽淮化股份有限公司 | The combination preparing device of a kind of granular urea and UAN liquid urea |
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