CN204911210U - Directly produce automobile -used urea solution device - Google Patents
Directly produce automobile -used urea solution device Download PDFInfo
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- CN204911210U CN204911210U CN201520220764.1U CN201520220764U CN204911210U CN 204911210 U CN204911210 U CN 204911210U CN 201520220764 U CN201520220764 U CN 201520220764U CN 204911210 U CN204911210 U CN 204911210U
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- urea
- sparger
- vehicle
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Abstract
The utility model belongs to a directly produce automobile -used urea solution device, include that the low temperature methanol washing workshop section, the liquid ammonia that say to link to each other with the transform trachea washes workshop section and secondary reverse osmosis device, the carbon dioxide stripping gas export of low temperature methanol washing workshop section links to each other through the gaseous phase import that the feed gas purified adsorption tower and urea synthesis workshop section, and it is continuous with the liquid phase import of urea synthesis workshop section that the gas exports of low temperature methanol washing workshop section washes workshop section and synthetic ammonia workshop section through liquid ammonia, the solid phase export of urea synthesis workshop section links to each other with the solid phase import of tympanic bulla agitator, the secondary reverse osmosis device loops through muddy bed, and electrolysis desalination device and pure water heating device link to each other with the liquid phase import of tympanic bulla agitator in succession, the export of tympanic bulla agitator links to each other with automobile -used urea storage device, simple structure has, process is reasonable, with low costs, the steady quality, can effectively replace current crystallization technology, realize that the large -scale industry metaplasia is produced to accord with the standard advantage of automobile -used urea with each item index.
Description
Technical field
The utility model belongs to urea for vehicle production technical field, is specifically related to a kind ofly effectively can to solve in urea for vehicle particulate material that content of formaldehyde exceeds standard, cost is low, steady quality, effectively can replaces existing crystallization processes and realize the direct production urea for vehicle solution containment of large-scale industrial production.
Background technology
Urea for vehicle, formal name used at school is diesel engine vent gas treatment fluid, is domesticly commonly called as automobile urea, urea for vehicle, automobile environment-protection urea, automobile-used denitrfying agent, uses the most generally urea for vehicle.Urea for vehicle is colourless, transparent, limpid liquid, and concentration is 31.8%-33.2%, and according to Europe IV standard, current 32.5% is standard compliant urea for vehicle concentration.Urea for vehicle is used for reduction of nitrogen oxide, can be used as SCR (SelectiveCatalyticReduction, SCR) reducing agent of system, utilize the reaction of nitrogen oxides in the urea for vehicle aqueous solution and the exhaust gas from diesel vehicle such as heavy truck, passenger vehicle to generate N
2and H
2o carrys out cleaning of off-gas, and the nitrogen oxide making it discharge reaches Europe IV discharge standard.The operation principle of urea for vehicle is that urea for vehicle is added to SCR system, and in the hot environment of temperature higher than 300 DEG C, urea decomposition becomes NH
3, then add V
2o
5-TiO
2, Ag-Al
2o
3, the series such as Cu-Zeolite the effect of catalyst, the NOx in tail gas can rapidly and NH
3reaction generates N
2and H
2o, and the delivery temperature of diesel engine is generally 300-500 DEG C, meets the temperature conditions needed for the hydrogen reduction of NOx nitrogen.
But the purity requirement of urea for vehicle is very high, want to have use up various method and access to produce a lot of enterprise of highly purified urea for vehicle, such as: its name of Chinese invention patent is called: a kind of preparation method of urea for vehicle, the patent No. is: 201210003845.7, the mode that it discloses a kind of urea recrystallization produces high-purity urea, then joins high purity water production urea for vehicle, but production highly energy-consuming, cost is higher, wastes a large amount of mother liquor.Its name of Chinese invention patent is called: a kind of production technology of tail gas catalytic reducer, and the patent No. is: 201010152076.8, it discloses a kind of continuous filtration and ion exchange technique and carries out exchanging the absorption of metal and nonmetallic ion; But complex technical process, cost is higher.In addition, the subject matter affecting enterprise's production urea for vehicle quality is the situation that ubiquity formaldehyde, makes a lot of enterprise cannot production urea for vehicle.
Utility model content
The purpose of this utility model is to overcome defect of the prior art, and content of formaldehyde exceeds standard, structure is simple, process is reasonable, cost is low to provide one can imitate in solution urea for vehicle particulate material, steady quality, can effectively replace existing crystallization processes, realize the direct production urea for vehicle solution containment that large-scale industrial production and indices meet urea for vehicle standard.
The purpose of this utility model is achieved in that the low-temperature rectisol workshop section comprising and being connected with conversion gas pipeline, the second level reverse osmosis apparatus that the liquefied ammonia be connected with nitrogen pipeline is washed workshop section and is connected with waterpipe, the carbon dioxide stripping gas outlet of low-temperature rectisol workshop section is connected with the gas phase import of urea synthesizing workshop section by raw material gas purifying adsorption tower, the gaseous phase outlet of low-temperature rectisol workshop section is washed workshop section by liquefied ammonia and is connected with the fluid inlet of urea synthesizing workshop section with synthetic ammonia workshop section, the solid-phase outlet of described urea synthesizing workshop section is connected with the solid phase import of sparger, described second level reverse osmosis apparatus passes through mixed bed successively, continuous electrolysis demineralizer is connected with the fluid inlet of sparger with pure water heater, the outlet of described sparger is connected with urea for vehicle storage device, be provided with automatic quantitative packing between the solid-phase outlet of described urea synthesizing workshop section and the solid phase import of sparger to claim, be provided with intelligent flow quantitative instrument between described pure water heater and the fluid inlet of sparger, described automatic quantitative packing claims to be connected with intelligent flow quantitative instrument by data wire.
Applicant is formaldehyde based on the main cause affecting urea for vehicle quality by a large amount of urea quality analysis discovery is not biuret or metal ion etc.: first, the biuret of 32.5% aqueous solution of urea that GB GB29518-2013 " Diesel engine NOx reducing agent aqueous solution of urea " specifies is 0.3%, should more than 0.9% corresponding to urea for vehicle particle, specify that agricultural urea high-class product biuret is 0.9% according to GB GB2440-2001 " urea " standard, by the detection of the urea product to Shanxi, Henan opener Tuan Yanhua Chemical Co., Ltd., excellence rate is more than 90%, the detection of the urea product of Shandong alliance Chemical Group, excellence rate is also even higher more than 90%, the contracting two of urea product is contracted below 0.9%, the requirement of the biuret 0.3% of the urea for vehicle aqueous solution can be met.So be not the key factor affecting urea for vehicle solution quality for common urea biuret.
Secondly, the biuret metal ion of 32.5% aqueous solution of urea that GB GB29518-2013 " Diesel engine NOx reducing agent aqueous solution of urea " specifies requires as following table:
| Calcium/(mg/kg)≤ | 0.5 |
| Iron/(mg/kg) | 0.5 |
| Copper/(mg/kg) | 0.2 |
| Zinc/(mg/kg)≤ | 0.2 |
| Chromium/(mg/kg)≤ | 0.2 |
| Nickel/(mg/kg)≤ | 0.2 |
| Aluminium/(mg/kg) | 0.5 |
| Magnesium/(mg/kg)≤ | 0.5 |
| Sodium/(mg/kg)≤ | 0.5 |
| Potassium/(mg/kg) | 0.5 |
Detect the aqueous solution of urea metal ion of enterprise:
By the metal ion detection of urea product 32.5% aqueous solution to above-mentioned several enterprise, the metal ion in urea granules all in the requirement of GB GB295182013, so be not the key factor affecting urea for vehicle quality for common urea metal ion.
Again, the aqueous solution of urea content of formaldehyde that GB GB29518-2013 " Diesel engine NOx reducing agent aqueous solution of urea " specifies is 5PPM, by the urea product testing result of above-mentioned enterprise as following table:
So the aldehyde content of the urea product of above-mentioned enterprise has all exceeded GB GB29518-2013 " the Diesel engine NOx reducing agent aqueous solution of urea " regulation to aldehydes, production urea for vehicle solution cannot be used for.
The utility model can be imitated and be solved the problem that in urea for vehicle particulate material, content of formaldehyde exceeds standard, have that structure is simple, process is reasonable, cost is low, steady quality, can effectively replace existing crystallization processes, realize the advantage that large-scale industrial production and indices meet urea for vehicle standard.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
As shown in Figure 1, the utility model is direct production urea for vehicle solution containment, comprise the low-temperature rectisol workshop section 1 be connected with conversion gas pipeline, the second level reverse osmosis apparatus 6 that the liquefied ammonia be connected with nitrogen pipeline is washed workshop section 3 and is connected with waterpipe, the carbon dioxide stripping gas outlet of low-temperature rectisol workshop section 1 is connected with the gas phase import of urea synthesizing workshop section 5 by raw material gas purifying adsorption tower 2, the gaseous phase outlet of low-temperature rectisol workshop section 1 is washed workshop section 3 by liquefied ammonia and is connected with the fluid inlet of urea synthesizing workshop section 5 with synthetic ammonia workshop section 4, the solid-phase outlet of described urea synthesizing workshop section 5 is connected with the solid phase import of sparger 12, described second level reverse osmosis apparatus 6 is successively by mixed bed 7, continuous electrolysis demineralizer 8 is connected with the fluid inlet of pure water heater 9 with sparger 12, the outlet of described sparger 12 is connected with urea for vehicle storage device 13, be provided with automatic quantitative packing between the solid-phase outlet of described urea synthesizing workshop section 5 and the solid phase import of sparger 12 and claim 11, be provided with intelligent flow quantitative instrument 10 between described pure water heater and the fluid inlet of sparger 12, described automatic quantitative packing claims 11 to be connected with intelligent flow quantitative instrument 10 by data wire.
Apply a production technology for direct production urea for vehicle solution containment, comprise the steps:
Step one: the conversion gas in conversion gas pipeline purifies rear remaining H by low-temperature rectisol workshop section 1
2, CH
4with a small amount of foreign gas, and parse carbon dioxide stripping gas, described carbon dioxide stripping gas is made up of according to percent by volume following gas, comprises H simultaneously
20.424%, CO0.061%, CO
298.5%, H
2s0.025%, COS0.0196%, CH
3oH0.02724%, N
20.94316; The temperature of described carbon dioxide stripping gas is: 30 DEG C, and pressure is: 0.25MPa;
Step 2: make the carbon dioxide stripping gas described in step one enter raw material gas purifying adsorption tower 2, the most of CH in carbon dioxide removal stripping gas
3oH is purified gas; Described purified gas is made up of according to percent by volume following gas, comprises H
20.114%, CO0.061%, CO
298.8399%, H
2s0.023%, COS0.019%, N
20.943 and CH
3oH0.0001%; CH in described purified gas
3oH percent by volume is not more than 0.0001%;
Step 3: the H come from low-temperature rectisol workshop section 1
2, CH
4enter liquefied ammonia with a small amount of foreign gas and wash workshop section 3, wash in workshop section 3 at liquefied ammonia and remove CH
4nitrogen and H is made with a small amount of foreign gas
2enter in synthetic ammonia workshop section 4 after mixing;
Step 4: make nitrogen and H in above-mentioned steps three
2the liquefied ammonia entering the synthesis after synthetic ammonia workshop section 4 after mixing is entered in urea synthesizing workshop section 5 by urea synthesizing workshop section 5 fluid inlet, and with the purified gas urea synthesis particle described in step 2;
Step 5 a: water is successively by second level reverse osmosis apparatus 6, mixed bed 7, continuous electrolysis demineralizer 8 enters in pure water heater 9, a described resistivity of water is 0.00058M Ω * cm, a described water is 0.06M Ω * cm by the resistivity after second level reverse osmosis apparatus 6, a described water is 2M Ω * cm by the resistivity after mixed bed 7, a described water is 15M Ω * cm by the resistivity after continuous electrolysis demineralizer 8, and a described water is by being heated to 60 DEG C ~ 70 DEG C after pure water heater 9;
Step 6: the urea granules weight that automatic quantitative packing claims 11 to enter the solid phase import of sparger 12 for the quantitative solid-phase outlet by urea synthesizing workshop section 5, and send these data to intelligent flow quantitative instrument 10 by data wire, described intelligent flow quantitative instrument 10 controls pure water in pure water heater by above-mentioned data and enters the amount of the fluid inlet of sparger 12, makes the mass concentration of urea for vehicle solution be 32.5%.；
Step 7: make mass concentration described in step 6 be 32.5% urea for vehicle solution enter in urea for vehicle storage device 13 by the outlet of sparger 12.
Claims (1)
1. a direct production urea for vehicle solution containment, comprise the low-temperature rectisol workshop section (1) be connected with conversion gas pipeline, the second level reverse osmosis apparatus (6) that the liquefied ammonia be connected with nitrogen pipeline is washed workshop section (3) and is connected with waterpipe, it is characterized in that: the carbon dioxide stripping gas outlet of low-temperature rectisol workshop section (1) is connected by the gas phase import of raw material gas purifying adsorption tower (2) with urea synthesizing workshop section (5), the gaseous phase outlet of low-temperature rectisol workshop section (1) is washed workshop section (3) by liquefied ammonia and is connected with the fluid inlet of urea synthesizing workshop section (5) with synthetic ammonia workshop section (4), the solid-phase outlet of described urea synthesizing workshop section (5) is connected with the solid phase import of sparger (12), described second level reverse osmosis apparatus (6) is successively by mixed bed (7), continuous electrolysis demineralizer (8) is connected with the fluid inlet of pure water heater (9) with sparger (12), the outlet of described sparger (12) is connected with urea for vehicle storage device (13), be provided with automatic quantitative packing between the solid-phase outlet of described urea synthesizing workshop section (5) and the solid phase import of sparger (12) to claim (11), be provided with intelligent flow quantitative instrument (10) between the fluid inlet of described pure water heater and sparger (12), described automatic quantitative packing claims (11) to be connected with intelligent flow quantitative instrument (10) by data wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520220764.1U CN204911210U (en) | 2015-04-14 | 2015-04-14 | Directly produce automobile -used urea solution device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520220764.1U CN204911210U (en) | 2015-04-14 | 2015-04-14 | Directly produce automobile -used urea solution device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204911210U true CN204911210U (en) | 2015-12-30 |
Family
ID=54960396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520220764.1U Withdrawn - After Issue CN204911210U (en) | 2015-04-14 | 2015-04-14 | Directly produce automobile -used urea solution device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204911210U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104772031A (en) * | 2015-04-14 | 2015-07-15 | 河南心连心化肥有限公司 | Direct vehicle urea solution production device and production method thereof |
| CN108793190A (en) * | 2018-07-30 | 2018-11-13 | 河南心连心化肥有限公司 | A kind of no CO2The ammonia preparation facilities and preparation method of discharge |
-
2015
- 2015-04-14 CN CN201520220764.1U patent/CN204911210U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104772031A (en) * | 2015-04-14 | 2015-07-15 | 河南心连心化肥有限公司 | Direct vehicle urea solution production device and production method thereof |
| CN108793190A (en) * | 2018-07-30 | 2018-11-13 | 河南心连心化肥有限公司 | A kind of no CO2The ammonia preparation facilities and preparation method of discharge |
| CN108793190B (en) * | 2018-07-30 | 2024-04-12 | 河南心连心化学工业集团股份有限公司 | CO-free 2 Preparation device and preparation method of discharged ammonia gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151230 Effective date of abandoning: 20171020 |