CN105777213A - Urea-ammonium nitrate solution production device and control method thereof - Google Patents
Urea-ammonium nitrate solution production device and control method thereof Download PDFInfo
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- CN105777213A CN105777213A CN201610087405.2A CN201610087405A CN105777213A CN 105777213 A CN105777213 A CN 105777213A CN 201610087405 A CN201610087405 A CN 201610087405A CN 105777213 A CN105777213 A CN 105777213A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C1/00—Ammonium nitrate fertilisers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P20/10—Process efficiency
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Abstract
The invention belongs to a urea-ammonium nitrate solution production device and a control method thereof.The urea-ammonium nitrate solution production device comprises a urea synthesis section flash tank, an ammonium nitrate solution pipe and a water delivery pipe, wherein the urea synthesis section flash tank is connected with a first inlet of a jet mixer through a urea solution pipe, the urea solution pipe is provided with a tee joint, the third end of the tee joint is connected with the water delivery pipe, the ammonium nitrate solution pipe is connected with a second inlet of the jet mixer through an ammonium nitrate storage tank, and an outlet of the jet mixer is connected with a product storage tank through a pipe mixer, a product stirring tank, a product delivery pump and a shell pass of a finished product cooler in sequence.A tail gas discharging port and a preservative and PH value regulator feeding port are respectively formed in the top of the product stirring tank.A circulating cooling water inlet pipe and a circulating cooling water outlet pipe are arranged on the shell pass of the finished product cooler.The urea-ammonium nitrate solution production device has the advantages of being simple in structure, reasonable in design, capable of performing continuous production and overcoming the defect of long production period, high in production efficiency, stable in product quality, capable of saving energy, environmentally friendly and suitable for large-scale batched production.
Description
Technical field
The invention belongs to carbamide ammonium nitrate solution production technical field, be specifically related to a kind of carbamide ammonium nitrate solution process units and control method thereof.
Background technology
Substantially supply exceed demand for current China carbamide production capacity, but high demand for investment, production capacity tend to superfluous situation and still continuing development, and utilization rate of fertilizer only has about 35%.Carbamide ammonium nitrate solution nitrogen content is 28%～32%, wherein nitrate nitrogen >=7.75%, ammonium nitrogen >=7.75%, amidonitrogen >=16.5%, the above two can be comparatively fast absorbed by crops, the fertilizer efficiency of amidonitrogen is more delayed, there is certain slow release effect, and fertilising is uniformly, and irrigation system can be injected.This fertilizer is used by means such as sprinkling irrigation, drip irrigation and mechanical deep fertilizings, and its utilization rate is up to 60%～80%, and wherein moisture also provides extra irrigation for crops, is widely used abroad.
UAN solution is formed by not concentrated urea liquid and ammonium nitrate solution mixture, decreases carbamide, the evaporation of ammonium nitrate, enrichment process, reduces the energy consumption of about 30%.UAN solution safety is good, stores, transport, easy to use, and the transportation volume of the carbamide ammonium nitrate solution (total nitrogen 32%) that state's extracellular concentration is higher, than common urea few nearly 20%.For fertilizer enterprises, ammonia nitrogen waste liquid always is a difficult problem, is forced additional investment because it may result in and takes treatment measures and increase running cost.These waste liquids can be directly added in carbamide ammonium nitrate solution and utilize.
A kind of nitrogen content concentration is high, and crop utilization rate is high, and on producing, reduce cost, the fertilizer that saves energy and protect environment is the needs of existing market.Patent CN103408332A carbamide ammonium nitrate solution preparation method provides the production method of a kind of carbamide ammonium nitrate solution, but in reactor, to stir 1-2 hour, needing the longer preparation time, the production cycle is longer, it is difficult to meet extensive large batch of production requirement.
Summary of the invention
It is an object of the invention to overcome defect of the prior art and provide a kind of simple in construction, reasonable in design, can produce, overcome the defect of production cycle length continuously, have that production efficiency height, flexible operation, constant product quality, energy consumption be low, energy-conserving and environment-protective, a kind of carbamide ammonium nitrate solution process units being suitable for large-scale batch production and control method thereof.
The object of the present invention is achieved like this: includes urea synthesis workshop section flash tank, ammonium nitrate solution pipeline and aqueduct, urea synthesis workshop section flash tank is connected with jet mixer the first import by urea liquid pipeline, described urea liquid pipeline is provided with threeway, 3rd end of described threeway is connected with aqueduct, ammonium nitrate solution pipeline is connected with jet mixer the second import by ammonium nitrate storage tank, jet mixer export pass sequentially through pipe-line mixer, product agitator tank, product delivery pump, finished product cooler tube side be connected with product storage tank；The top of described product agitator tank is respectively equipped with exhaust port and preservative and pH value regulator dispensing port；The shell side of described finished product cooler is provided with recirculated cooling water inlet pipeline and circulating cooling water exit conduit.
Being sequentially installed with stop valve, urea liquid effusion meter on described urea liquid pipeline, threeway, urea solution pump, mixture flow rate meter and first regulate sequencing valve；The second adjustment sequencing valve and water ga(u)ge it is sequentially installed with between aqueduct and the 3rd end of threeway, 3rd adjustment sequencing valve and ammonium nitrate effusion meter is installed between ammonium nitrate storage tank and jet mixer the second import, described urea liquid effusion meter is connected respectively through the input of the first transmitter and the second transmitter and the first comparator with water ga(u)ge, and the outfan of described first comparator and second regulates sequencing valve and is connected；Described mixture flow rate meter and ammonium nitrate effusion meter are connected respectively through the 3rd transmitter and the 4th transmitter and the second ratio controller input, and the second described comparator outfan and the first sequencing valve and the 3rd sequencing valve are connected.
The control method of a kind of carbamide ammonium nitrate solution process units, comprises the steps:
Step one: the urea solution temperature in urea synthesis workshop section flash tank is 85 DEG C～90 DEG C, and urea content is: 71.10%, moisture is: 28.05%；Ammonium nitrate temperature in ammonium nitrate solution pipeline is: 130 DEG C, and ammonium nitrate content is: 90%～96%, and moisture is: 5.5%；
Step 2: opening stop valve, urea solution pump, first regulates sequencing valve, second regulates sequencing valve and the 3rd regulates sequencing valve, urea liquid in urea synthesis workshop section flash tank enters in threeway by stop valve and urea liquid effusion meter, water in aqueduct is entered in threeway by the second adjustment sequencing valve and water ga(u)ge by the 3rd end of threeway, signal is delivered in the first comparator respectively through the first transmitter and the second transmitter by urea liquid effusion meter and water ga(u)ge, the outfan of the first comparator is by controlling the aperture of the second adjustment sequencing valve, the ratio realizing urea solution mass mark and water quality mark is 1.8～2.2；Urea liquid and water first mixed mixed material in threeway pass sequentially through urea solution pump, mixture flow rate meter, the first adjustment sequencing valve and jet mixer the first import and enter in jet mixer, ammonium nitrate in ammonium nitrate solution pipeline passes sequentially through ammonium nitrate storage tank, the 3rd adjustment sequencing valve, ammonium nitrate effusion meter and jet mixer the second import and enters in jet mixer and carry out secondary mixing, makes semi-finished product carbamide ammonium nitrate solution；Signal is delivered in the second ratio controller respectively through the 3rd transmitter and the 4th transmitter by mixture flow rate meter and ammonium nitrate effusion meter, second comparator is by controlling the aperture of the first sequencing valve and the 3rd sequencing valve, and the ratio realizing mixed material mass fraction and ammonium nitrate mass fraction is: 1.2～1.8；
Step 3: make the semi-finished product carbamide ammonium nitrate solution described in step 2 enter in product agitator tank after entering three mixing of pipe-line mixer by the outlet of jet mixer, the tail gas that semi-finished product carbamide ammonium nitrate solution produces in product agitator tank is discharged by exhaust port, adding preservative and PH regulator in semi-finished product carbamide ammonium nitrate solution by preservative and pH value regulator dispensing port, the pH value making semi-finished product carbamide ammonium nitrate solution is 6.5～7.5 simultaneously；
Step 5: the carbamide ammonium nitrate solution making pH value described in step 4 be 6.5～7.5 passes sequentially through the tube side of product delivery pump and finished product cooler and enters product storage tank,；Described pH value be the carbamide ammonium nitrate solution of 6.5～7.5 by the tube side of finished product cooler time temperature be 80 DEG C～100 DEG C, its cooled down by the recirculated cooling water of the shell side of finished product cooler after temperature be 20 DEG C～25 DEG C.
A kind of carbamide ammonium nitrate solution process units made according to such scheme and control method thereof, by utilizing jet mixer and pipe-line mixer that water, urea liquid, ammonium nitrate solution are carried out conveying mixing.Mixing continuous uniform, takes full advantage of self-priming and the mixed function of ejector, and energy consumption is low, and production efficiency is substantially improved, energy-conserving and environment-protective, constant product quality, is suitable for large-scale batch production；On aqueduct, go out on flash tank urine pipeline, ammonium nitrate storage tank is connected on pipeline with ejector to be provided with effusion meter and regulates sequencing valve, by ratio controller with regulate sequencing valve, accurately controls each quality of material ratio, constant product quality；By regulating ratio controller numerical value, this device can produce three kinds of variable concentrations carbamide ammonium nitrate solution products of UAN-28, UAN-30 and UAN-32；Have simple in construction, reasonable in design, can produce, overcome the defect of production cycle length continuously, have that production efficiency height, flexible operation, constant product quality, energy consumption be low, energy-conserving and environment-protective, the advantage that is suitable for large-scale batch production.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
In order to the technical characteristic of the present invention, purpose and effect are more clearly understood from, now comparison accompanying drawing illustrates the specific embodiment of the present invention, and label identical in the various figures represents identical parts.For making simplified form, only schematically show and invent relevant part in each figure, they do not represent its practical structures as product.
As shown in Figure 1, the present invention includes urea synthesis workshop section flash tank 1, ammonium nitrate solution pipeline 2 and aqueduct 3, urea synthesis workshop section flash tank 1 is connected with jet mixer 6 first import by urea liquid pipeline 4, described urea liquid pipeline 4 is provided with threeway, 3rd end of described threeway is connected with aqueduct 3, ammonium nitrate solution pipeline 2 is connected with jet mixer 6 second import by ammonium nitrate storage tank 5, jet mixer 6 export pass sequentially through pipe-line mixer 7, product agitator tank 8, product delivery pump 9, finished product cooler 10 tube side be connected with product storage tank 11；The top of described product agitator tank 8 is respectively equipped with exhaust port 12 and preservative and pH value regulator dispensing port 13；The shell side of described finished product cooler 10 is provided with recirculated cooling water inlet pipeline 23 and circulating cooling water exit conduit 24.
Being sequentially installed with stop valve 14, urea liquid effusion meter 15 on described urea liquid pipeline 4, threeway, urea solution pump 16, mixture flow rate meter 17 and first regulate sequencing valve 18；The second adjustment sequencing valve 19 and water ga(u)ge 20 it is sequentially installed with between aqueduct 3 and the 3rd end of threeway, 3rd adjustment sequencing valve 21 and ammonium nitrate effusion meter 22 is installed between ammonium nitrate storage tank 5 and jet mixer 6 second import, described urea liquid effusion meter 15 is connected respectively through the input of the first transmitter 25 with the second transmitter 26 with the first comparator 27 with water ga(u)ge 20, and the outfan of described first comparator 27 and second regulates sequencing valve 19 and is connected；Described mixture flow rate meter 17 is connected with the second ratio controller 30 input with the 4th transmitter 29 respectively through the 3rd transmitter 28 with ammonium nitrate effusion meter 22, and the second described comparator 30 outfan is connected with the first sequencing valve 18 and the 3rd sequencing valve 21.
The control method of a kind of carbamide ammonium nitrate solution process units, comprises the steps:
Step one: the urea solution temperature in urea synthesis workshop section flash tank 1 is 85 DEG C～90 DEG C, and urea content is: 71.10%, moisture is: 28.05%；Ammonium nitrate temperature in ammonium nitrate solution pipeline 2 is: 130 DEG C, and ammonium nitrate content is: 90%～96%, and moisture is: 5.5%；
Step 2: opening stop valve 14, urea solution pump 16, first regulates sequencing valve 18, second regulates sequencing valve 19 and the 3rd regulates sequencing valve 21, urea liquid in urea synthesis workshop section flash tank 1 enters in threeway by stop valve 14 and urea liquid effusion meter 15, water in aqueduct 3 is entered in threeway by the second adjustment sequencing valve 19 and water ga(u)ge 20 by the 3rd end of threeway, signal is delivered in the first comparator 27 respectively through the first transmitter 25 and the second transmitter 26 by urea liquid effusion meter 15 and water ga(u)ge 20, the outfan of the first comparator 27 is by controlling the aperture of the second adjustment sequencing valve 19, the ratio realizing urea solution mass mark and water quality mark is 1.8～2.2；Urea liquid and water first mixed mixed material in threeway pass sequentially through urea solution pump 16, mixture flow rate meter 17, first regulates sequencing valve 18 and jet mixer 6 first import enters in jet mixer 6, ammonium nitrate in ammonium nitrate solution pipeline 2 passes sequentially through ammonium nitrate storage tank the 5, the 3rd adjustment sequencing valve 21, ammonium nitrate effusion meter and jet mixer the second import and enters in jet mixer and carry out secondary mixing, makes semi-finished product carbamide ammonium nitrate solution；Signal is delivered in the second ratio controller respectively through the 3rd transmitter and the 4th transmitter by mixture flow rate meter and ammonium nitrate effusion meter, second comparator is by controlling the aperture of the first sequencing valve and the 3rd sequencing valve, and the ratio realizing mixed material mass fraction and ammonium nitrate mass fraction is: 1.2～1.8；
Step 3: make the semi-finished product carbamide ammonium nitrate solution described in step 2 enter in product agitator tank after entering three mixing of pipe-line mixer by the outlet of jet mixer, the tail gas that semi-finished product carbamide ammonium nitrate solution produces in product agitator tank is discharged by exhaust port, adding preservative and PH regulator in semi-finished product carbamide ammonium nitrate solution by preservative and pH value regulator dispensing port, the pH value making semi-finished product carbamide ammonium nitrate solution is 6.5～7.5 simultaneously；
Step 5: the carbamide ammonium nitrate solution making pH value described in step 4 be 6.5～7.5 passes sequentially through the tube side of product delivery pump and finished product cooler and enters product storage tank,；Described pH value be the carbamide ammonium nitrate solution of 6.5～7.5 by the tube side of finished product cooler time temperature be 80 DEG C～100 DEG C, its cooled down by the recirculated cooling water of the shell side of finished product cooler after temperature be 20 DEG C～25 DEG C.
For the more detailed explanation present invention, in conjunction with embodiment, the present invention is further elaborated.Specific embodiment is as follows:
Embodiment one
The control method of a kind of carbamide ammonium nitrate solution process units, comprises the steps:
Step one: the urea solution temperature in urea synthesis workshop section flash tank 1 is 85 DEG C～90 DEG C, and urea content is: 71.10%, moisture is: 28.05%；Ammonium nitrate temperature in ammonium nitrate solution pipeline 2 is: 130 DEG C, and ammonium nitrate content is: 90%～96%, and moisture is: 5.5%；
Step 2: opening stop valve 14, urea solution pump 16, first regulates sequencing valve 18, second regulates sequencing valve 19 and the 3rd regulates sequencing valve 21, urea liquid in urea synthesis workshop section flash tank 1 enters in threeway by stop valve 14 and urea liquid effusion meter 15, water in aqueduct 3 is entered in threeway by the second adjustment sequencing valve 19 and water ga(u)ge 20 by the 3rd end of threeway, signal is delivered in the first comparator 27 respectively through the first transmitter 25 and the second transmitter 26 by urea liquid effusion meter 15 and water ga(u)ge 20, the outfan of the first comparator 27 is by controlling the aperture of the second adjustment sequencing valve 19, the ratio realizing urea solution mass mark and water quality mark is 1.8；Urea liquid and water first mixed mixed material in threeway pass sequentially through urea solution pump 16, mixture flow rate meter 17, first regulates sequencing valve 18 and jet mixer 6 first import enters in jet mixer 6, ammonium nitrate in ammonium nitrate solution pipeline 2 passes sequentially through ammonium nitrate storage tank the 5, the 3rd adjustment sequencing valve 21, ammonium nitrate effusion meter and jet mixer the second import and enters in jet mixer and carry out secondary mixing, makes semi-finished product carbamide ammonium nitrate solution；Signal is delivered in the second ratio controller respectively through the 3rd transmitter and the 4th transmitter by mixture flow rate meter and ammonium nitrate effusion meter, second comparator is by controlling the aperture of the first sequencing valve and the 3rd sequencing valve, and the ratio realizing mixed material mass fraction and ammonium nitrate mass fraction is: 1.2；
Step 3: make the semi-finished product carbamide ammonium nitrate solution described in step 2 enter in product agitator tank after entering three mixing of pipe-line mixer by the outlet of jet mixer, the tail gas that semi-finished product carbamide ammonium nitrate solution produces in product agitator tank is discharged by exhaust port, adding preservative and PH regulator in semi-finished product carbamide ammonium nitrate solution by preservative and pH value regulator dispensing port, the pH value making semi-finished product carbamide ammonium nitrate solution is 6.5 simultaneously；
Step 5: the carbamide ammonium nitrate solution making pH value described in step 4 be 6.5 passes sequentially through the tube side of product delivery pump and finished product cooler and enters product storage tank,；Described pH value be the carbamide ammonium nitrate solution of 6.5 by the tube side of finished product cooler time temperature be 80 DEG C, its cooled down by the recirculated cooling water of the shell side of finished product cooler after temperature be 20 DEG C.
Embodiment two
The control method of a kind of carbamide ammonium nitrate solution process units, comprises the steps:
Step one: the urea solution temperature in urea synthesis workshop section flash tank 1 is 85 DEG C～90 DEG C, and urea content is: 71.10%, moisture is: 28.05%；Ammonium nitrate temperature in ammonium nitrate solution pipeline 2 is: 130 DEG C, and ammonium nitrate content is: 90%～96%, and moisture is: 5.5%；
Step 2: opening stop valve 14, urea solution pump 16, first regulates sequencing valve 18, second regulates sequencing valve 19 and the 3rd regulates sequencing valve 21, urea liquid in urea synthesis workshop section flash tank 1 enters in threeway by stop valve 14 and urea liquid effusion meter 15, water in aqueduct 3 is entered in threeway by the second adjustment sequencing valve 19 and water ga(u)ge 20 by the 3rd end of threeway, signal is delivered in the first comparator 27 respectively through the first transmitter 25 and the second transmitter 26 by urea liquid effusion meter 15 and water ga(u)ge 20, the outfan of the first comparator 27 is by controlling the aperture of the second adjustment sequencing valve 19, the ratio realizing urea solution mass mark and water quality mark is 2.2；Urea liquid and water first mixed mixed material in threeway pass sequentially through urea solution pump 16, mixture flow rate meter 17, first regulates sequencing valve 18 and jet mixer 6 first import enters in jet mixer 6, ammonium nitrate in ammonium nitrate solution pipeline 2 passes sequentially through ammonium nitrate storage tank the 5, the 3rd adjustment sequencing valve 21, ammonium nitrate effusion meter and jet mixer the second import and enters in jet mixer and carry out secondary mixing, makes semi-finished product carbamide ammonium nitrate solution；Signal is delivered in the second ratio controller respectively through the 3rd transmitter and the 4th transmitter by mixture flow rate meter and ammonium nitrate effusion meter, second comparator is by controlling the aperture of the first sequencing valve and the 3rd sequencing valve, and the ratio realizing mixed material mass fraction and ammonium nitrate mass fraction is: 1.8；
Step 3: make the semi-finished product carbamide ammonium nitrate solution described in step 2 enter in product agitator tank after entering three mixing of pipe-line mixer by the outlet of jet mixer, the tail gas that semi-finished product carbamide ammonium nitrate solution produces in product agitator tank is discharged by exhaust port, adding preservative and PH regulator in semi-finished product carbamide ammonium nitrate solution by preservative and pH value regulator dispensing port, the pH value making semi-finished product carbamide ammonium nitrate solution is 7.5 simultaneously；
Step 5: the carbamide ammonium nitrate solution making pH value described in step 4 be 7.5 passes sequentially through the tube side of product delivery pump and finished product cooler and enters product storage tank,；Described pH value be the carbamide ammonium nitrate solution of 7.5 by the tube side of finished product cooler time temperature be 100 DEG C, its cooled down by the recirculated cooling water of the shell side of finished product cooler after temperature be 25 DEG C.
Embodiment three
The control method of a kind of carbamide ammonium nitrate solution process units, comprises the steps:
Step one: the urea solution temperature in urea synthesis workshop section flash tank 1 is 85 DEG C～90 DEG C, and urea content is: 71.10%, moisture is: 28.05%；Ammonium nitrate temperature in ammonium nitrate solution pipeline 2 is: 130 DEG C, and ammonium nitrate content is: 90%～96%, and moisture is: 5.5%；
Step 2: opening stop valve 14, urea solution pump 16, first regulates sequencing valve 18, second regulates sequencing valve 19 and the 3rd regulates sequencing valve 21, urea liquid in urea synthesis workshop section flash tank 1 enters in threeway by stop valve 14 and urea liquid effusion meter 15, water in aqueduct 3 is entered in threeway by the second adjustment sequencing valve 19 and water ga(u)ge 20 by the 3rd end of threeway, signal is delivered in the first comparator 27 respectively through the first transmitter 25 and the second transmitter 26 by urea liquid effusion meter 15 and water ga(u)ge 20, the outfan of the first comparator 27 is by controlling the aperture of the second adjustment sequencing valve 19, the ratio realizing urea solution mass mark and water quality mark is 2.0；Urea liquid and water first mixed mixed material in threeway pass sequentially through urea solution pump 16, mixture flow rate meter 17, first regulates sequencing valve 18 and jet mixer 6 first import enters in jet mixer 6, ammonium nitrate in ammonium nitrate solution pipeline 2 passes sequentially through ammonium nitrate storage tank the 5, the 3rd adjustment sequencing valve 21, ammonium nitrate effusion meter and jet mixer the second import and enters in jet mixer and carry out secondary mixing, makes semi-finished product carbamide ammonium nitrate solution；Signal is delivered in the second ratio controller respectively through the 3rd transmitter and the 4th transmitter by mixture flow rate meter and ammonium nitrate effusion meter, second comparator is by controlling the aperture of the first sequencing valve and the 3rd sequencing valve, and the ratio realizing mixed material mass fraction and ammonium nitrate mass fraction is: 1.5；
Step 3: make the semi-finished product carbamide ammonium nitrate solution described in step 2 enter in product agitator tank after entering three mixing of pipe-line mixer by the outlet of jet mixer, the tail gas that semi-finished product carbamide ammonium nitrate solution produces in product agitator tank is discharged by exhaust port, adding preservative and PH regulator in semi-finished product carbamide ammonium nitrate solution by preservative and pH value regulator dispensing port, the pH value making semi-finished product carbamide ammonium nitrate solution is 7 simultaneously；
Step 5: the carbamide ammonium nitrate solution making pH value described in step 4 be 7 passes sequentially through the tube side of product delivery pump and finished product cooler and enters product storage tank,；Described pH value be the carbamide ammonium nitrate solution of 7 by the tube side of finished product cooler time temperature be 90 DEG C, its cooled down by the recirculated cooling water of the shell side of finished product cooler after temperature be 22.5 DEG C.
In describing the invention, it will be appreciated that, term " top ", etc. instruction orientation or position relationship be based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or hint indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.In describing the invention, it is necessary to explanation, unless otherwise clearly defined and limited, term " being provided with ", " installation ", " being connected " etc. should be interpreted broadly, for instance, it is possible to it is fixing connection, connects integratedly, it is also possible to be removably connect；It can also be the connection of two element internals；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, for the ordinary skill in the art, it is possible to understand above-mentioned term concrete meaning in the present invention as the case may be.It is to be noted in this article, " first ", " second ", " the 3rd " etc. are only for differentiation each other, but not represent their significance level and order etc..Foregoing detailed description is only for illustrating of the feasibility embodiment of the present invention; they also are not used to limit the scope of the invention, and all equivalent implementations, change and transformations made without departing from skill of the present invention spirit should be included within protection scope of the present invention.
Claims (3)
1. a carbamide ammonium nitrate solution process units, including urea synthesis workshop section flash tank (1), ammonium nitrate solution pipeline (2) and aqueduct (3), it is characterized in that: urea synthesis workshop section flash tank (1) is connected with jet mixer (6) first import by urea liquid pipeline (4), described urea liquid pipeline (4) is provided with threeway, 3rd end of described threeway is connected with aqueduct (3), ammonium nitrate solution pipeline (2) is connected with jet mixer (6) second import by ammonium nitrate storage tank (5), jet mixer (6) outlet passes sequentially through pipe-line mixer (7), product agitator tank (8), product delivery pump (9), the tube side of finished product cooler (10) is connected with product storage tank (11)；The top of described product agitator tank (8) is respectively equipped with exhaust port (12) and preservative and pH value regulator dispensing port (13)；The shell side of described finished product cooler (10) is provided with recirculated cooling water inlet pipeline (23) and circulating cooling water exit conduit (24).
2. a kind of carbamide ammonium nitrate solution process units according to claim 1, it is characterized in that: being sequentially installed with stop valve (14), urea liquid effusion meter (15) on described urea liquid pipeline (4), threeway, urea solution pump (16), mixture flow rate meter (17) and first regulate sequencing valve (18)；The second adjustment sequencing valve (19) and water ga(u)ge (20) it is sequentially installed with between aqueduct (3) and the 3rd end of threeway, 3rd adjustment sequencing valve (21) and ammonium nitrate effusion meter (22) is installed between ammonium nitrate storage tank (5) and jet mixer (6) second import, described urea liquid effusion meter (15) is connected respectively through the input of the first transmitter (25) with the second transmitter (26) with the first comparator (27) with water ga(u)ge (20), the outfan of described first comparator (27) and second regulates sequencing valve (19) and is connected；Described mixture flow rate meter (17) is connected with the second ratio controller (30) input with the 4th transmitter (29) respectively through the 3rd transmitter (28) with ammonium nitrate effusion meter (22), and described the second comparator (30) outfan and the first sequencing valve (18) and the 3rd sequencing valve (21) are connected.
3. the control method of a kind of carbamide ammonium nitrate solution process units as claimed in claim 1, it is characterised in that: this control method comprises the steps:
Step one: the urea solution temperature in urea synthesis workshop section flash tank (1) is 85 DEG C～90 DEG C, and urea content is: 71.10%, moisture is: 28.05%；Ammonium nitrate temperature in ammonium nitrate solution pipeline (2) is: 130 DEG C, and ammonium nitrate content is: 90%～96%, and moisture is: 5.5%；
nullStep 2: opening stop valve (14)、Urea solution pump (16)、First regulates sequencing valve (18)、Second regulates sequencing valve (19) and the 3rd regulates sequencing valve (21)，Urea liquid in urea synthesis workshop section flash tank (1) is entered in threeway by stop valve (14) and urea liquid effusion meter (15)，Water in aqueduct (3) is entered in threeway by the 3rd end of threeway by the second adjustment sequencing valve (19) and water ga(u)ge (20)，Signal is delivered in the first comparator (27) by urea liquid effusion meter (15) and water ga(u)ge (20) respectively through the first transmitter (25) and the second transmitter (26)，The outfan of the first comparator (27) is by controlling the aperture of the second adjustment sequencing valve (19)，The ratio realizing urea solution mass mark and water quality mark is 1.8～2.2；Urea liquid and water first mixed mixed material in threeway pass sequentially through urea solution pump (16), mixture flow rate meter (17), the first adjustment sequencing valve (18) and jet mixer (6) first import and enter in jet mixer (6), ammonium nitrate in ammonium nitrate solution pipeline (2) passes sequentially through ammonium nitrate storage tank (5), the 3rd adjustment sequencing valve (21), ammonium nitrate effusion meter (22) and jet mixer (6) second import and enters in jet mixer (6) and carry out secondary mixing, makes semi-finished product carbamide ammonium nitrate solution；Signal is delivered in the second ratio controller (30) respectively through the 3rd transmitter (28) and the 4th transmitter (29) by mixture flow rate meter (17) and ammonium nitrate effusion meter (22), second comparator (30) is by controlling the aperture of the first sequencing valve (18) and the 3rd sequencing valve (21), and the ratio realizing mixed material mass fraction and ammonium nitrate mass fraction is: 1.2～1.8；
Step 3: make the semi-finished product carbamide ammonium nitrate solution described in step 2 enter in product agitator tank (8) after entering (7) three mixing of pipe-line mixer by the outlet of jet mixer (6), the tail gas that semi-finished product carbamide ammonium nitrate solution produces in product agitator tank (8) is discharged by exhaust port (12), adding preservative and PH regulator in semi-finished product carbamide ammonium nitrate solution by preservative and pH value regulator dispensing port (13), the pH value making semi-finished product carbamide ammonium nitrate solution is 6.5～7.5 simultaneously；
Step 5: the carbamide ammonium nitrate solution making pH value described in step 4 be 6.5～7.5 passes sequentially through the tube side of product delivery pump (9) and finished product cooler (10) and enters product storage tank (11),；Described pH value be the carbamide ammonium nitrate solution of 6.5～7.5 by the tube side of finished product cooler (10) time temperature be 80 DEG C～100 DEG C, its cooled down by the recirculated cooling water of the shell side of finished product cooler (10) after temperature be 20 DEG C～25 DEG C.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107626255A (en) * | 2017-09-22 | 2018-01-26 | 河南心连心化肥有限公司 | A kind of device and collocation method for configuring urea ammonium nitrate solution |
| CN112694349A (en) * | 2020-12-24 | 2021-04-23 | 绿色造粒(北京)技术有限公司 | Preparation system and preparation method of slow-release urea |
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| CN112694349A (en) * | 2020-12-24 | 2021-04-23 | 绿色造粒(北京)技术有限公司 | Preparation system and preparation method of slow-release urea |
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