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
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
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (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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