SU452558A1 - The method of automatic control of the operation of the wash column in the production of urea - Google Patents
The method of automatic control of the operation of the wash column in the production of ureaInfo
- Publication number
- SU452558A1 SU452558A1 SU1870841A SU1870841A SU452558A1 SU 452558 A1 SU452558 A1 SU 452558A1 SU 1870841 A SU1870841 A SU 1870841A SU 1870841 A SU1870841 A SU 1870841A SU 452558 A1 SU452558 A1 SU 452558A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- urea
- wash column
- production
- automatic control
- column
- Prior art date
Links
- 238000000034 method Methods 0.000 title description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title 1
- 239000004202 carbamide Substances 0.000 title 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- JJEJDZONIFQNHG-UHFFFAOYSA-N [C+4].N Chemical class [C+4].N JJEJDZONIFQNHG-UHFFFAOYSA-N 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 150000003863 ammonium salts Chemical class 0.000 description 3
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
1one
Изобретение может быть использовано в химической промышленности.The invention can be used in the chemical industry.
Известен способ автоматического управлени работой промывной колонны путем регулировани подачи жидкого аммиака, расхода конденсата сокового пара, температуры в барботере изменением подачи в него охлаждающей воды и уровн жидкости в промывной колонне воздействием па пневмопривод гидромуфты насоса, отсасывающего раствор углеаммониевых солей.There is a known method of automatically controlling the operation of the wash column by adjusting the supply of liquid ammonia, the flow rate of condensed steam, the bubbler temperature by changing the coolant supply to it and the level of the liquid in the wash column by the action of a pneumatic drive of the hydraulic coupling of the pump, suctioning the carbon ammonium salts solution.
Однако такой способ не исключает проскоков углекислого газа с отгон емым аммиаком, не обеспечивает надежности в работе насоса, а также не предотвращает кристаллизации солей в аппарате, что снижает эффективность работы агрегата.However, this method does not exclude carbon dioxide overshoot with distilled ammonia, does not provide reliability in the pump operation, and also does not prevent salt crystallization in the apparatus, which reduces the efficiency of the unit.
С целью устранени указанных недостатков по предлагаемому способу при регулировании подачи жидкого аммиака ввод т коррекцию по температуре нижней части колонны, при регулировании подачи конденсата сокового пара осуществл ют коррекцию по плотности раствора углеаммониевых солей, а регулирующее воздействие на пневмопривод гидромуфты насоса осуществл ют в зависимости от числа его ходов, при этом задание регул тору числа ходов насоса измен ют в зависимости от уровн в колонне.In order to eliminate the above disadvantages of the proposed method, when adjusting the flow of liquid ammonia, a correction for the temperature of the bottom of the column is introduced, while regulating the flow of condensate juice steam, the ammonium salts are corrected for the density of the solution, and the regulating effect on the pump hydraulic coupling pneumatic drive is dependent on the number its strokes, while the task of controlling the number of strokes of the pump is changed depending on the level in the column.
На чертеже изображена установка дл реализации предложенного способа.The drawing shows the installation for the implementation of the proposed method.
Газы десорбции с первой ступени дистилл ции с температурой 120-130°С подаютс вThe desorption gases from the first distillation stage with a temperature of 120-130 ° C are fed to
барботер К где охлаждаютс до 85-95°С и углекислый газ поглощаетс слабым раствором углеаммониевых солей, поступающим из куба промывной колонны 2. Раствор углеаммониевых солей с большим содержанием углекислого газа насосом 3 подаетс в колонну синтеза, а газ (в основном аммиак с небольшим остаточным содержанием углекислого газа и воды) поступает под насадку, орошаемую жидким аммиаком и конденсатом сокового пара, и, пройд ее, а затем тарельчатый промыватель, на который также подаетс жидкий аммиак, удал етс из верхней части колонны 2 и поступает в холодильник-конденсатор . На орошение этой колонны подают потоки конденсата сокового пара на насадку и жидкого аммиака на насадку и промыватель, а в куб - поток слабых углеаммониевых солей со второй ступени дистилл ции. На линии крепких углеаммониевых солей после барботера 1bubbler K where it is cooled to 85-95 ° C and carbon dioxide is absorbed by a weak solution of ammonium salts coming from the bottom of the wash column 2. A solution of carbon-ammonium salts with a high content of carbon dioxide is pumped to the synthesis column 3, and the gas (mainly ammonia with a small residual carbon dioxide and water) is fed under the nozzle, irrigated with liquid ammonia and condensate juice steam, and, having passed it, and then the dish washer, which also serves liquid ammonia, is removed from the top of column 2 and Stops in the fridge-condenser. For the irrigation of this column, flows of condensate of juice vapor are fed to the nozzle and liquid ammonia to the nozzle and washer, and to the cube - a stream of weak ammonium salts from the second distillation stage. On the line of strong carbon ammonium salts after the bubbler 1
измер ют их плотность плотномером 4 и расход (косвенно, по числу ходов карбаматного насоса) счетчиком 5. В зависимости от плотности углеаммониевых солей измен ют подачу действу на задание стабилизирующего регу-Ео 9 KodoxKirAjsd edBH олоао оз нхвэнэ1Гнонtheir density is measured by a densitometer 4 and the flow rate (indirectly, by the number of strokes of the carbamate pump) by the meter 5. Depending on the density of the carbon-ammonium salts, the feed is applied to the task of the stabilizing regulator-Eo 9
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1870841A SU452558A1 (en) | 1973-01-02 | 1973-01-02 | The method of automatic control of the operation of the wash column in the production of urea |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1870841A SU452558A1 (en) | 1973-01-02 | 1973-01-02 | The method of automatic control of the operation of the wash column in the production of urea |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU452558A1 true SU452558A1 (en) | 1974-12-05 |
Family
ID=20538919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1870841A SU452558A1 (en) | 1973-01-02 | 1973-01-02 | The method of automatic control of the operation of the wash column in the production of urea |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU452558A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4301299A (en) * | 1979-10-08 | 1981-11-17 | Toyo Engineering Corporation | Synthesis of urea |
-
1973
- 1973-01-02 SU SU1870841A patent/SU452558A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4301299A (en) * | 1979-10-08 | 1981-11-17 | Toyo Engineering Corporation | Synthesis of urea |
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