CN104208987A - Tail gas recovery device for urea ammonium nitrate solution production - Google Patents
Tail gas recovery device for urea ammonium nitrate solution production Download PDFInfo
- Publication number
- CN104208987A CN104208987A CN201410503697.4A CN201410503697A CN104208987A CN 104208987 A CN104208987 A CN 104208987A CN 201410503697 A CN201410503697 A CN 201410503697A CN 104208987 A CN104208987 A CN 104208987A
- Authority
- CN
- China
- Prior art keywords
- ammonium nitrate
- pipeline
- nitrate solution
- absorption tower
- urea ammonium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- CSGLCWIAEFNDIL-UHFFFAOYSA-O azanium;urea;nitrate Chemical compound [NH4+].NC(N)=O.[O-][N+]([O-])=O CSGLCWIAEFNDIL-UHFFFAOYSA-O 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 238000011084 recovery Methods 0.000 title abstract 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 73
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 35
- 239000002253 acid Substances 0.000 claims abstract description 7
- 238000010521 absorption reaction Methods 0.000 claims description 60
- 230000002745 absorbent Effects 0.000 claims description 21
- 239000002250 absorbent Substances 0.000 claims description 21
- 238000002360 preparation method Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 9
- 229910052749 magnesium Inorganic materials 0.000 claims description 9
- 239000011777 magnesium Substances 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 7
- 238000012856 packing Methods 0.000 claims description 7
- 238000003912 environmental pollution Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 57
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 12
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 6
- 239000001569 carbon dioxide Substances 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- 239000000618 nitrogen fertilizer Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical group [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Gas Separation By Absorption (AREA)
Abstract
The invention provides a tail gas recovery device for urea ammonium nitrate solution production. The tail gas recovery device for the urea ammonium nitrate solution production comprises a urea ammonium nitrate solution preparing tank, an absorbing tower, a buffer tank, a circulating pump, a cooler and an injecting pump. The absorbing tower comprises a filling support plate, a filling pressing plate, filling and a distributor; the outlet of the urea ammonium nitrate solution preparing tank is connected with the lower inlet of the side wall of the absorbing tower; the top outlet of the absorbing tower is connected with the inlet of the choke of the injecting pump; the outlet of the circulating pump is connected with the inlet of the cooler; the outlet of the coller is connected with the inlet of the upper end of the side wall of the absorbing tower through a first pipe; the first pipe is connected with a second pipe towards an acid tank, the connecting position of the first pipe and the second pipe is a node A, and the portion of the first pipe between the node A and the cooler is connected with the inlet of the other end of the injecting pump. The tail gas recovery device for the urea ammonium nitrate solution production is simple in technical design, effectively recovers gaseous ammonia in tail gas and reduces consumption and environmental pollution.
Description
Technical field
The invention belongs to chemical fertilizer field, particularly relate to the device for recovering tail gas in a kind of urea ammonium nitrate solution production.
Background technology
Urea ammonium nitrate solution (Urea Ammonium Nitrate solution), is called for short UAN solution,, also referred to as nitrogen solution (N solution), is abroad formulated by urea, ammonium nitrate and water.UAN solution is a kind of liquid nitrogenous fertilizer of stable, colourless, normal pressure, fertilizer efficiency, energy-conservation, reduce environmental pollution, and economic benefit, is all better than solid-state nitrogenous fertilizer, has bright prospects at home and abroad.
UAN produces the U.S. that starts from the seventies in last century, is used widely at present.The output of global urea ammonium nitrate solution in 2013 surpasses 2,000 ten thousand tons, and China is nitrogen fertilizer production big country, and the process units of UAN is in the starting stage, and application prospect is very wide.UAN generally adopts normal pressure to produce, and by certain density urea liquid and ammonium nitrate solution, prepares in proportion, and because production temperature is higher, hydrolysis of urea, generates a large amount of gas ammonia (NH3) and carbon dioxide (CO2).Because UAN produces, under normal pressure, prepare, gas ammonia discharges by the blow-down pipe on UAN make-up tank top, and pollution and loss are larger, produces statistics and finds, its proportion of goods damageds are about 0.1-0.2%, produce 100 tons of UAN products, and gas ammonia loss is 100-200kg.
Summary of the invention
For above-mentioned technical problem, the object of this invention is to provide the device for recovering tail gas in a kind of urea ammonium nitrate solution production, can meet Production requirement, reclaim the gas ammonia in tail gas, reduce and consume, reduce environmental pollution.
The technical solution used in the present invention is:
Device for recovering tail gas in a kind of urea ammonium nitrate solution production, comprise urea ammonium nitrate solution preparation groove, absorption tower, dashpot, circulating pump, cooler and volley pump, described absorption tower comprises packing support plate, hold-down grid, filler and distributor, described filler is arranged between described packing support plate and described hold-down grid, described distributor is arranged on described hold-down grid top, the outlet of described urea ammonium nitrate solution preparation groove is connected with the lower sidewall entrance on described absorption tower by pipeline, the top exit on described absorption tower is connected with the described trunnion entrance that volleys pump by pipeline, describedly volley one end of pump and the top of described dashpot is connected, the bottom on described absorption tower is connected with the top of described dashpot by pipeline, the outlet at bottom of described dashpot is connected with the entrance of described circulating pump by pipeline, described circulation delivery side of pump is connected with the entrance of described cooler by pipeline, the outlet of described cooler is connected by the side wall upper part entrance on the first pipeline and absorption tower, described the first pipeline is connected with the second pipeline of deallocation acid tank, connection is node A, described the first pipeline is connected with the described entrance that volleys the other end of pump by pipeline to the part between cooler at node A, described the first pipeline is provided with the first control valve at node A to the part between absorption tower, on described the second pipeline, the second control valve is installed.
Device for recovering tail gas in urea ammonium nitrate solution production of the present invention, wherein, at described absorption tower inner top, be provided with and add sprinkler head, described in add sprinkler head and be connected with gas ammonia absorbent intake line, on described gas ammonia absorbent intake line, the 3rd control valve is installed.
Device for recovering tail gas in urea ammonium nitrate solution production of the present invention, wherein, described gas ammonia absorbent intake line is connected to the pipeline between absorption tower with described urea ammonium nitrate solution preparation groove by pipeline and valve to the part between absorption tower at the 3rd control valve.
Device for recovering tail gas in urea ammonium nitrate solution production of the present invention, wherein, described gas ammonia absorbent adopts desalted water or magnesium tail water, is preferably magnesium tail water.
Device for recovering tail gas in urea ammonium nitrate solution production of the present invention, wherein, the top of described dashpot is also provided with the discharge pipe of on-condensible gas, and described discharge pipe is provided with the 4th control valve.
Device for recovering tail gas in urea ammonium nitrate solution production of the present invention, wherein, described absorption tower to dashpot pipeline designs is U-shaped pipe, described absorption tower bottom level is higher than dashpot.
Device for recovering tail gas in urea ammonium nitrate solution production of the present invention, wherein, the controlled pressure in described urea ammonium nitrate solution preparation groove and absorption tower is-20～-30KPa.
Beneficial effect of the present invention:
Device for recovering tail gas in urea ammonium nitrate solution production of the present invention, by changing UAN solution preparation groove normal pressure equipment into negative pressure equipment, be about to general uncovered equipment and be designed to Sealing Arrangement, guarantee that gas ammonia and carbon dioxide flow in UAN solution preparation groove and absorption tower, by volleying the solution amount control of pump inlet, answer pressure, utilization volleys pump and produces negative pressure, avoid adopting the power-equipments such as compressor, energy-saving effect is obvious, technological design is simple, met Production requirement, reclaimed the gas ammonia in tail gas, solution after gas ammonia reclaims is recycled to complex acid groove, can be used as raw materials for production is utilized completely, reduced consumption, reduced environmental pollution.
Urea ammonium nitrate solution of the present invention device for recovering tail gas in producing, is provided with and adds sprinkler head at described absorption tower inner top, described in add sprinkler head and be connected with gas ammonia absorbent intake line, utilize gas ammonia absorbent can effectively absorb the gas ammonia in tail gas.
Device for recovering tail gas in urea ammonium nitrate solution production of the present invention, described gas ammonia absorbent intake line is connected to the pipeline between absorption tower with described urea ammonium nitrate solution preparation groove by pipeline and valve to the part between absorption tower at the 3rd control valve, urea ammonium nitrate solution preparation groove in the Pipeline transport process of absorption tower because temperature reduces, easily there is ammonium carbonate crystallization in pipeline, by adding gas ammonia absorbent periodic flushing, can avoid pipeline Crystallization Plugging.
Device for recovering tail gas in urea ammonium nitrate solution production of the present invention, the first-selected magnesium tail water that adopts of described gas ammonia absorbent, is secondly desalted water.Magnesium tail water is the waste water that indirect method is produced red fuming nitric acid (RFNA), main component is rare nitric acid of concentration 3-5%, with magnesium tail water as absorbent, magnesium tail water reacts fast with gas ammonia, and assimilation effect is better, and ammonium nitrate solution circulation absorbs and concentrate, the ammonium nitrate solution reclaiming is recycled to complex acid groove, then as raw materials for production, utilized completely, both the nitric acid in efflux wastewater can be recycled, reduced again the environmental pollution of discharge nitric acid waste water.
Device for recovering tail gas in urea ammonium nitrate solution production of the present invention, the top of described dashpot is also provided with the discharge pipe of on-condensible gas, and described discharge pipe is provided with the 4th control valve, can regularly discharge on-condensible gas.
Device for recovering tail gas in urea ammonium nitrate solution production of the present invention, described absorption tower to dashpot pipeline designs is U-shaped pipe, can better keep the negative pressure in absorption tower, absorption tower device bottom height, higher than dashpot, can guarantee that absorption tower lower liquid can flow in dashpot automatically by potential difference.
Accompanying drawing explanation
Fig. 1 is the structural representation of the device for recovering tail gas during urea ammonium nitrate solution of the present invention is produced.
In figure: 1, UAN solution preparation groove; 2, absorption tower; 21, add sprinkler head; 22, distributor; 23, filler; 24, packing support plate; 25, hold-down grid; 3, dashpot; 4, circulating pump; 5, cooler; 6, volley pump; 7, the first control valve; 8, the second control valve; 9, the 3rd control valve; 10, the first pipeline; 11, second pipe; 12, the 4th control valve; 13, valve.
Below with reference to drawings and Examples, the present invention is described in detail.
The specific embodiment
Embodiment 1
As shown in Figure 1, device for recovering tail gas in a kind of urea ammonium nitrate solution production, comprise UAN solution preparation groove 1, absorption tower 2, dashpot 3, circulating pump 4, cooler 5 and volley pump 6, absorption tower 2 comprises packing support plate 24, hold-down grid 25, filler 23 and distributor 22, filler 23 is arranged between packing support plate 24 and hold-down grid 25, distributor 22 is arranged on hold-down grid 25 tops, on absorption tower, 2 inner tops are provided with and add sprinkler head 21, adding sprinkler head 21 is connected with gas ammonia absorbent intake line, on described gas ammonia absorbent intake line, the 3rd control valve 9 is installed, described gas ammonia absorbent adopts magnesium tail water, the outlet of UAN solution preparation groove 1 is connected with the lower sidewall entrance on absorption tower 2 by pipeline, the top exit on absorption tower 2 is connected with the trunnion entrance that volleys pump 6 by pipeline, the one end that volleys pump 6 is connected with the top of dashpot 3, the bottom on absorption tower 2 is connected with the top of surge tank 3 by pipeline, the outlet at bottom of dashpot 3 is connected with the entrance of circulating pump 4 by pipeline, the outlet of circulating pump 4 is connected with the entrance of cooler 5 by pipeline, the outlet of cooler 5 is connected by the side wall upper part entrance on the first pipeline 10 and absorption tower 2, the first pipeline 10 is connected with the second pipeline 11 of deallocation acid tank, connection is node A, the first pipeline 10 is connected with the entrance that volleys the other end of pump 6 by pipeline to the part between cooler 2 at node A, the first pipeline 10 is provided with the first control valve 7 at node A to the part between absorption tower 2, the second control valve 8 is installed on the second pipeline 11, described gas ammonia absorbent intake line is connected to the pipeline between absorption tower 2 with UAN solution preparation groove 1 by pipeline and valve 13 to the part between absorption tower 2 at the 3rd control valve 9, the top of dashpot 3 is also provided with the discharge pipe of on-condensible gas, and described discharge pipe is provided with the 4th control valve 12, and absorption tower 2 is U-shaped pipe to dashpot 3 pipeline designs, and the bottom level on absorption tower 2 is higher than dashpot 3.
The operation principle of the device for recovering tail gas in the production of the present embodiment urea ammonium nitrate solution: in the course of the work, in UAN solution preparation groove 1, gas ammonia and carbon dioxide enter into 2 bottoms, absorption tower by pipeline, and gas ammonia and carbon dioxide upwards pass through absorption tower 2 at the bottom of 2 towers of absorption tower; The negative pressure on absorption tower 2 produces by volleying pump 6, volley pump 6 and carry liquid by circulating pump, produce relative negative pressure volleying pump 6 trunnion places, negative pressure control is built in-20 to-30KPa, volley pump 6 trunnions and be connected with absorption tower 2 top gas phases, absorption tower 2 top gas are extracted out, on absorption tower 2 and the interior generation negative pressure of UAN solution preparation groove 1, gas ammonia and carbon dioxide are interior mobile at UAN solution preparation groove 1 and absorption tower 2, complete absorption process; It is exothermic reaction that absorption tower 2 absorbs gas ammonia, and solution temperature raises, and by cooler 5, solution temperature is reduced; When solution absorbs after gas ammonia, generate ammonium nitrate solution, after cooler 5 coolings, be divided into three parts, a part is as volleying pump 6 power, on absorption tower 2 and UAN solution preparation groove 1 produce negative pressure, a part is as the absorbent on absorption tower 2, and circulation absorbs gas ammonia, and some is after concentration improves, deliver to complex acid groove, as the raw material of producing ammonium nitrate and UAN.
Embodiment 2
Be with the difference of embodiment 1: the present embodiment gas ammonia absorbent adopts desalted water.
Above-described embodiment is described the preferred embodiment of the present invention; not scope of the present invention is limited; design under the prerequisite of spirit not departing from the present invention; various distortion and improvement that those of ordinary skills make technical scheme of the present invention, all should fall in the definite protection domain of the claims in the present invention book.
Claims (8)
1. the urea ammonium nitrate solution device for recovering tail gas in producing, it is characterized in that: comprise urea ammonium nitrate solution preparation groove (1), absorption tower (2), dashpot (3), circulating pump (4), cooler (5) and volley pump (6), described absorption tower (2) comprises packing support plate (24), hold-down grid (25), filler (23) and distributor (22), described filler (23) is arranged between described packing support plate (24) and described hold-down grid (25), described distributor (22) is arranged on described hold-down grid (25) top, the outlet of described urea ammonium nitrate solution preparation groove (1) is connected with the lower sidewall entrance of described absorption tower (2) by pipeline, the top exit on described absorption tower (2) by pipeline with described in volley pump (6) trunnion entrance be connected, described one end that volleys pump (6) is connected with the top of described dashpot (3), the bottom on described absorption tower (2) is connected with the top of described dashpot (3) by pipeline, the outlet at bottom of described dashpot (3) is connected with the entrance of described circulating pump (4) by pipeline, the outlet of described circulating pump (4) is connected with the entrance of described cooler (5) by pipeline, the outlet of described cooler (5) is connected with the side wall upper part entrance of absorption tower (2) by the first pipeline (10), described the first pipeline (10) is connected with second pipeline (11) of deallocation acid tank, connection is node A, described the first pipeline (10) be positioned at node A to the part between cooler (5) by pipeline with described in volley the other end of pump (6) entrance be connected, described the first pipeline (10) is positioned at node A, to the part between absorption tower (2), the first control valve (7) is installed, the second control valve (8) is installed on described the second pipeline (11).
2. urea ammonium nitrate solution according to claim 1 device for recovering tail gas in producing, it is characterized in that: at described absorption tower (2) inner top, be provided with and add sprinkler head (21), the described sprinkler head (21) that adds is connected with gas ammonia absorbent intake line, and the 3rd control valve (9) is installed on described gas ammonia absorbent intake line.
3. the device for recovering tail gas in urea ammonium nitrate solution production according to claim 2, is characterized in that: described gas ammonia absorbent intake line is positioned at the 3rd control valve (9) and is connected to the pipeline between absorption tower (2) with described urea ammonium nitrate solution preparation groove (1) by pipeline and valve (13) to the part between absorption tower (2).
4. the device for recovering tail gas in producing according to the urea ammonium nitrate solution described in claim 1-3 any one, is characterized in that: described gas ammonia absorbent adopts desalted water or magnesium tail water.
5. the device for recovering tail gas in urea ammonium nitrate solution production according to claim 4, is characterized in that: described gas ammonia absorbent adopts magnesium tail water.
6. the device for recovering tail gas in urea ammonium nitrate solution production according to claim 5, is characterized in that: the top of described dashpot (3) is also provided with the discharge pipe of on-condensible gas, and described discharge pipe is provided with the 4th control valve (12).
7. urea ammonium nitrate solution according to claim 6 device for recovering tail gas in producing, it is characterized in that: described absorption tower (2) are U-shaped pipe to dashpot (3) pipeline designs, and the bottom level of described absorption tower (2) is higher than dashpot (3).
8. the device for recovering tail gas in urea ammonium nitrate solution production according to claim 7, is characterized in that: the controlled pressure in described urea ammonium nitrate solution preparation groove (1) and absorption tower (2) is-20～-30KPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410503697.4A CN104208987B (en) | 2014-09-26 | 2014-09-26 | Device for recovering tail gas in a kind of urea ammonium nitrate solution production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410503697.4A CN104208987B (en) | 2014-09-26 | 2014-09-26 | Device for recovering tail gas in a kind of urea ammonium nitrate solution production |
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| Publication Number | Publication Date |
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| CN104208987A true CN104208987A (en) | 2014-12-17 |
| CN104208987B CN104208987B (en) | 2016-03-02 |
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| CN201410503697.4A Expired - Fee Related CN104208987B (en) | 2014-09-26 | 2014-09-26 | Device for recovering tail gas in a kind of urea ammonium nitrate solution production |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105126546A (en) * | 2015-08-10 | 2015-12-09 | 大唐环境产业集团股份有限公司 | Ammonia absorption treatment device and method |
| CN105413406A (en) * | 2015-12-27 | 2016-03-23 | 安徽淮化股份有限公司 | Recycling system of ammonia gas in emptying tail gas and operation method therefor |
| CN105920979A (en) * | 2016-05-23 | 2016-09-07 | 肥西县鑫山机械厂 | Industrial tail gas fine purifier |
| CN105944516A (en) * | 2016-07-03 | 2016-09-21 | 安徽碧源环保工程有限公司 | Industrial tail gas fine cleaner |
| CN105944510A (en) * | 2016-07-03 | 2016-09-21 | 安徽碧源环保工程有限公司 | Industrial tail gas fine cleaning process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105920979A (en) * | 2016-05-23 | 2016-09-07 | 肥西县鑫山机械厂 | Industrial tail gas fine purifier |
| CN105944516A (en) * | 2016-07-03 | 2016-09-21 | 安徽碧源环保工程有限公司 | Industrial tail gas fine cleaner |
| CN105944510A (en) * | 2016-07-03 | 2016-09-21 | 安徽碧源环保工程有限公司 | Industrial tail gas fine cleaning process |
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| CN104208987B (en) | 2016-03-02 |
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