CN1293187A - Process for clarifying gas containing urea powder - Google Patents
Process for clarifying gas containing urea powder Download PDFInfo
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- CN1293187A CN1293187A CN 99121906 CN99121906A CN1293187A CN 1293187 A CN1293187 A CN 1293187A CN 99121906 CN99121906 CN 99121906 CN 99121906 A CN99121906 A CN 99121906A CN 1293187 A CN1293187 A CN 1293187A
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- urea
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Abstract
A process for clarifying the gas containing urea dust features that the gas containing urea dust is directly fed into granulating tower and rises with the air stream moving from tower bottom to top, while airis supplied by the blowing louver in the lower part, and the fused urea substance is sprayed from tower top to bottom, and the urea dust in gas is in contact with the fused urea substance and absorbed by the latter, so clarifying the gas.
Description
The present invention relates to a kind of method of clarifying gas containing urea powder, belong to the production method that contains urea or urea compounds fertilizer.
Existing purification contains the method for dusty gas, as China's number of patent application: 95115949.6 (notification numbers: CN1137938A) denomination of invention: gas-cleaning installation.It is especially for the gas-cleaning installation of removing dirts such as dust in the gas, bacterium, poison gas.It is characterized in that making contaminated gas on the liquid level of the washings that can absorb corresponding dirt, to enter washings, afterwards, under the liquid level of this washings, overflow again, thereby reach the purpose of Purge gas.Its not enough place is: must handle the washings that contains urea.
The objective of the invention is to propose a kind of urea granules product that directly carbamide dust is converted into, simultaneously the method for clarifying gas containing urea powder.
The object of the present invention is achieved like this: the gas that directly will contain carbamide dust is sent into prilling tower, the shower nozzle at original prilling tower top sprays into drop with the urea melts, motion from the top down in prilling tower, air enters in the tower from the air draught blind window of prilling tower bottom, motion from bottom to top, the gas that contains carbamide dust is sent in the tower outside tower, move to cat head with upstream, carbamide dust and urea melts drop inverse motion, contact and be absorbed with the melts drop, reach containing the carbamide dust gas cleaning by absorption.
Advantage of the present invention is: 1. adopt existing prilling tower to purify the gas that contains urea (or other material harmless to urea quality) dust, can reduce the gas sweetening investment.2. because carbamide dust is converted into the urea granules product, therefore can not produce secondary pollution, help environment protection.
Accompanying drawing of the present invention has:
The process flow diagram of Fig. 1 clarifying gas containing urea powder.
A kind of dust of Fig. 2 and urea product particle bonded synoptic diagram.
Another kind of dust of Fig. 3 and urea product particle bonded synoptic diagram.
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Fig. 1 is the process flow diagram of clarifying gas containing urea powder.The existing washing process that contains carbamide dust gas is: at first gas being imported water wash column, is that washing medium purifies the gas that contains carbamide dust with water in water wash column, and the urea concentration in the water progressively increases.Need this moment to replenish fresh washing water, and the washing water of enrichment are sent to vaporizer, return the urea main flow after further evaporating enrichment, be sent to the granulation of granulation cat head with main flow to water wash column.Present method can be simplified above-mentioned flow process, the gas that directly will contain carbamide dust is sent into prilling tower 1, the shower nozzle 2 at original prilling tower top sprays into drop with the urea melts, motion from the top down in prilling tower 1, air enters in the tower from the air draught blind window 3 of prilling tower 1 bottom, motion from bottom to top, the gas that contains carbamide dust is sent into outside tower in the tower, moves to cat head with upstream.Carbamide dust and urea melts drop inverse motion contact and are absorbed with the melts drop.Reach containing the purpose of carbamide dust gas sweetening by absorption.
Fig. 2 is dust and urea product particle bonded synoptic diagram.Dust granules participates in the crystallization of urea melts drop as nucleus, and combines with the urea granules product thus.
Fig. 3 is another kind of dust and urea product particle bonded synoptic diagram.Dust granules is bondd by the urea in the crystallisation process, and combines with the urea granules product thus.
By Fig. 2 and two processes of Fig. 3, be in the urea melts drop that carbamide dust in the upstream is in the decline state and absorb.
Claims (3)
1. the method for a clarifying gas containing urea powder, it is characterized in that: the gas that directly will contain carbamide dust is sent into prilling tower (1), the shower nozzle (2) at original prilling tower top sprays into drop with the urea melts, motion from the top down in prilling tower (1), air enters in the tower from the air draught blind window (3) of prilling tower (1) bottom, motion from bottom to top, the gas that contains carbamide dust is sent in the tower outside tower, move to cat head with upstream, carbamide dust and urea melts drop inverse motion, contact and be absorbed with the melts drop, reach containing the carbamide dust gas cleaning by absorption.
2. the method for clarifying gas containing urea powder according to claim 1, it is characterized in that above-mentioned dust granules participates in the crystallization of urea melts drop as nucleus, and combine with the urea granules product thus, be in the urea melts drop that carbamide dust in the upstream is in the decline state and absorb.
3. the method for clarifying gas containing urea powder according to claim 1, it is characterized in that above-mentioned dust granules is bondd by the urea in the crystallisation process, and combine with the urea granules product thus, be in the urea melts drop that carbamide dust in the upstream is in the decline state and absorb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99121906 CN1099411C (en) | 1999-10-14 | 1999-10-14 | Process for clarifying gas containing urea powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99121906 CN1099411C (en) | 1999-10-14 | 1999-10-14 | Process for clarifying gas containing urea powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1293187A true CN1293187A (en) | 2001-05-02 |
| CN1099411C CN1099411C (en) | 2003-01-22 |
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ID=5282183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99121906 Expired - Fee Related CN1099411C (en) | 1999-10-14 | 1999-10-14 | Process for clarifying gas containing urea powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1099411C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103127897A (en) * | 2013-03-08 | 2013-06-05 | 南开大学 | Synthesizer of imidazolium ionic liquids and application thereof |
| CN106118893A (en) * | 2016-06-30 | 2016-11-16 | 江绍玫 | A kind of gentleness, green cleaning agent and preparation method thereof |
-
1999
- 1999-10-14 CN CN 99121906 patent/CN1099411C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103127897A (en) * | 2013-03-08 | 2013-06-05 | 南开大学 | Synthesizer of imidazolium ionic liquids and application thereof |
| CN103127897B (en) * | 2013-03-08 | 2014-05-28 | 南开大学 | Synthesizer of imidazolium ionic liquids and application thereof |
| CN106118893A (en) * | 2016-06-30 | 2016-11-16 | 江绍玫 | A kind of gentleness, green cleaning agent and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1099411C (en) | 2003-01-22 |
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