CN2443963Y - Washing column for urea evaporating - Google Patents
Washing column for urea evaporating Download PDFInfo
- Publication number
- CN2443963Y CN2443963Y CN 00249586 CN00249586U CN2443963Y CN 2443963 Y CN2443963 Y CN 2443963Y CN 00249586 CN00249586 CN 00249586 CN 00249586 U CN00249586 U CN 00249586U CN 2443963 Y CN2443963 Y CN 2443963Y
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- CN
- China
- Prior art keywords
- tower
- tower body
- urea
- inlet
- right air
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- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The utility model relates to the technical field of a washing tower for chemical equipment. The utility model is designed in order to absorb urea in recovery tail gas. The utility model is characterized in that the space at the lower part of a tower body is divided into a left and a right air chambers by a venting splitter plate; simultaneously, the left and the right air chambers are provided with spray heads for circulating liquid; the bottom of the tower body has an outlet for the circulating liquid, and the side wall of the left air chamber is provided with an inlet for steam; the space above the left and the right air chambers of the tower body is distributed with tower trays; an antifogging plate is arranged in the space above the tower trays of the tower body, an inlet for condensate liquid is arranged above the antifogging plate, and an outlet for the steam is arranged at the top part of the tower body. The utility model has the advantages of little resistance, good washing effects, and high recovery urea rates, and is suitable for popularization and application in devices for producing urea.
Description
The utility model relates to washing tower technical field in the chemical industry equipment, relates in particular to urea plant one, dual circulation gas separating device outlet gas phase are cleaned the washing plant technical field that reclaims urea mist body.
In the urea plant through one, the dual circulation separator outlet emits gas; usually also contain the urea composition; general content is 0.99%; and reality can reach about 1.5%; especially the urea plant that big load is overfulfiled a production target can be higher, directly is discharged in the atmospheric environment usually in the past and goes, and it can bring environmental pollution; and reduction production efficiency, increase a series of problems such as production cost.Someone absorbs washing tower and reclaims in the urea plant urea in the discharge tail gas, this exists an outstanding contradiction on original general washing plant structure, it is good to want cleaning performance, needs atomization space, and wants to reduce equipment resistance, must reduce air-flow walks enough fluid-spaces should be arranged, therefore adopt common device structure, or increase cleaning performance, but increase equipment resistance, the minimizing equipment resistance, but sacrificed cleaning performance.
The purpose of this utility model is to provide a kind of equipment resistance little, and washing times is many, effective, reclaims the high urea boil-off gas cleaning tower of urea rate.
The technical solution of the utility model is to realize like this.This urea boil-off gas cleaning tower, comprise tower body, be respectively arranged with steam-gas inlet and outlet on the tower body, also be provided with liquid-inlet and outlet, it is characterized in that: the tower body lower space is separated into left and right air chamber with the ventilation division plate, left and right air chamber is provided with the circulation fluid shower nozzle simultaneously, and the circulation fluid outlet is arranged at the tower body bottom, and left gas chamber sidewall is provided with steam-gas inlet; Tower body is distributed with tower tray in left and right air chamber upper space; Tower body is provided with antifog plate again in the tower tray upper space, the phlegma inlet is arranged above the antifog plate, and the tower body top is provided with vapor outlet port.
Cleaning tower of the present utility model has the following advantages: 1. equipment resistance is little, adopt horizontal air inlet, be not subjected to device-restrictive,, do not need excessive device diameters like this because regulate highly arbitrarily, can effectively reduce resistance again, clean a large amount of condensations of back water vapor, gas velocity can descend significantly, utilizes Space better again, with Ф 1200G2X type boil-off gas cleaning tower is example, and it is 1.2 * 2=2.4m that its side is advanced area
2, and the cylindrical shell cross-sectional area is 1.2m
2* 0.785=1.13m
2, expansion is twice, and flow velocity can reduce by one times, and then resistance reduces by 3 times, is 1/4 of former flow velocity, can be by 600 tons of urea production abilities of daily output.2. how effective washing times is, and equipment is divided into left and right air chamber, i.e. air inlet is washed once through efficient shower nozzle when left air chamber; Clean again once by the porous plurality of water curtain layers during by division plate, make circulation fluid produce the part boil-off gas simultaneously and take heat out of to reduce boil-off gas; Air inlet is cleaned for the third time during to right air chamber; Clean the 4th time when rising to big flux tower tray, separate entrained liquid simultaneously, this moment, tolerance was reduced to about 1/3, advance the eddy flow plate and carry out the separation second time, clean and secondary separation through four times so altogether, guaranteed cleaning performance, avoid cleaning back entrainment to surface cooler again and cause invalid washing phenomenon, urea rate of recovery height in the tail gas reclaims through two sections series connection cleaning tower, and residual urea content reduces to 0.03～0.05%.3. has washing cooling double effects, boil-off gas is cooled in cleaning process, and scavenging solution is heated when washing, absorbs heat in equilibrium temperature place boil-off gas under vacuum condition, then the heat of boil-off gas gas obtains pre-cooledly before surface cooler, can reduce the thermal load of surface cooler.
Description of drawings.
Fig. 1. urea boil-off gas cleaning tower structural representation;
Fig. 2. band reference mark cleaning tower process flow sheet.
Below in conjunction with description of drawings embodiment of the present utility model is described in further detail.
As shown in the figure, this urea boil-off gas cleaning tower is separated into left and right sides air chamber in tower body 5 lower space with ventilation division plate 4, left and right air chamber is provided with a plurality of circulation fluid shower nozzles 3, the spray circulation fluid, circulation fluid outlet m is arranged at the tower body bottom, circulation fluid is delivered to washing liquor tank, and left gas chamber sidewall is provided with the import of urea boil-off gas and connects boil-off gas separator gaseous phase outlet in the urea plant.Tower body is distributed with two-layer tower tray 2 at left and right air chamber upper space, be preferably big flux tower tray, to reduce air resistance, in the tower tray superjacent air space, antifog plate 1 is set again, phlegma inlet b is arranged above the antifog plate, spray absorbs the phlegma of urea steam, the tower body top is provided with vapor outlet port a, will handle the steam emptying or deliver to the continuation of next stage cleaning tower to absorb recovery.Reclaim urea in the steam in order to absorb better, phlegma inlet c can also be set in space between tower tray and the antifog plate again, be provided with phlegma inlet d in right air chamber circulation fluid shower nozzle superjacent air space, a plurality of circulation fluid shower nozzles link to each other with its tower outer circulation liquid inlet e, f, g, h, i, j in the left and right air chamber.
Claims (3)
1. urea boil-off gas cleaning tower, include tower body (5), be respectively arranged with steam-gas inlet and outlet on the tower body, also be provided with liquid-inlet and outlet, it is characterized in that: the tower body lower space is separated into left and right air chamber with ventilation division plate (4), left and right air chamber is provided with circulation fluid shower nozzle (3) simultaneously, and the circulation fluid outlet is arranged at the tower body bottom, and left gas chamber sidewall is provided with steam-gas inlet; Tower body is distributed with tower tray (2) in left and right air chamber upper space; Tower body is provided with antifog plate (1) again in the tower tray upper space, the phlegma inlet is arranged above the antifog plate, and the tower body top is provided with vapor outlet port.
2. cleaning tower as claimed in claim 1 is characterized in that also being provided with between described tower tray and the antifog plate phlegma inlet.
3. cleaning tower as claimed in claim 1 or 2 is characterized in that described right air chamber is provided with the phlegma inlet in circulation fluid shower nozzle superjacent air space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00249586 CN2443963Y (en) | 2000-10-09 | 2000-10-09 | Washing column for urea evaporating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00249586 CN2443963Y (en) | 2000-10-09 | 2000-10-09 | Washing column for urea evaporating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2443963Y true CN2443963Y (en) | 2001-08-22 |
Family
ID=33608003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00249586 Expired - Lifetime CN2443963Y (en) | 2000-10-09 | 2000-10-09 | Washing column for urea evaporating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2443963Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1313468C (en) * | 2003-04-29 | 2007-05-02 | 巴斯福股份公司 | Purification of high-purity triethylenediamine (TEDA) by distillation |
| CN104949533A (en) * | 2015-06-08 | 2015-09-30 | 许伟 | Electric furnace zinc-smelting tail gas recovery system and control method thereof |
| CN107367177A (en) * | 2017-07-31 | 2017-11-21 | 贵州宜化化工有限责任公司 | A kind of exhaust gas cooling device of carbamide production system |
-
2000
- 2000-10-09 CN CN 00249586 patent/CN2443963Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1313468C (en) * | 2003-04-29 | 2007-05-02 | 巴斯福股份公司 | Purification of high-purity triethylenediamine (TEDA) by distillation |
| CN104949533A (en) * | 2015-06-08 | 2015-09-30 | 许伟 | Electric furnace zinc-smelting tail gas recovery system and control method thereof |
| CN104949533B (en) * | 2015-06-08 | 2017-03-08 | 西安西核新能源科技有限公司 | A kind of recovery system of electric furnace zinc smelting tail gas and its control method |
| CN107367177A (en) * | 2017-07-31 | 2017-11-21 | 贵州宜化化工有限责任公司 | A kind of exhaust gas cooling device of carbamide production system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NINGBO YUANDONG CHEMICAL ENGINEERING SCIENCE CO., Free format text: FORMER OWNER: YUANDONG COLUMN CARBURETOR INGINEERING LTD., NINGBO CITY Effective date: 20060113 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20060113 Address after: 315040, block A, block 12D, 168 Zhangs Road, Zhejiang, Ningbo Patentee after: Yuandong Chemical Science & Tech, Co., Ltd., Ningbo Address before: 315322, Sinpo Industrial Zone, Zhejiang, Ningbo Province Patentee before: Yuandong Column Carburetor Ingineering Ltd., Ningbo City |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20101009 Granted publication date: 20010822 |