CN101773759A - Recovery process of dust during process of producing compound fertilizer through agglomeration process - Google Patents
Recovery process of dust during process of producing compound fertilizer through agglomeration process Download PDFInfo
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- CN101773759A CN101773759A CN 201010118853 CN201010118853A CN101773759A CN 101773759 A CN101773759 A CN 101773759A CN 201010118853 CN201010118853 CN 201010118853 CN 201010118853 A CN201010118853 A CN 201010118853A CN 101773759 A CN101773759 A CN 101773759A
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Abstract
The invention relates to a recovery process of dust during the process of producing compound fertilizer through agglomeration process. The recovery process comprises the following steps: (1) using a warm-air wind machine to send thermal current with dust to a dryer through a pipeline for drying; (2) sending the dried thermal current to a cyclone separator through a pipeline for separation; (3) after the primary separation by using the cyclone separator, sending the obtained thermal current to a first gravity settling separator; (4) then sending the thermal current which passes through the first gravity settling separator to a cooler for cooling; (5) sending the cooled air current to a second gravity settling separator; and (6) sending the obtained air current to a circulating water washer for further separation, and then sending gas to a wastewater treatment working section. The beneficial effects of the invention are as follows: the dust recovery rate is increased from 30-40% to 70-85%, the saved water consumption is up to 50%, the investment is less and the effect is obvious.
Description
Technical field
The invention belongs to a kind of process in the chemical fertilizer production, specifically, relate in particular to the recovery technology of dust in a kind of granulating method production composite fertilizer process.
Background technology
In the process of granulating method production composite fertilizers such as disk granulation cylinder granulation, owing to various raw materials (urea, MAP, potassium chloride, ammonium sulfate etc.) are mixing, granulation, heated-air drying, cooling in the processes such as screening, produces dust inevitably.These dust are exactly to produce the various raw materials of NPK composite fertilizer and in whole process in fact, the new compound that produced etc. because temperature, moisture etc. change.Recycling is qualified as the raw material of production composite fertilizer.These dust are directly to be discharged in the atmosphere but always with the dry gas stream refrigerating gas, not only waste resource and contaminated environment but for a long time.
Over the past two years, country had strengthened the management of environmental pollution.Composite fertilizer enterprise begins to administer and recycle these dust.But the method that adopts is removing recirculated water washing (absorption dust) device behind the air-flow of process drier and cooler process cyclone separator and the deflector type gravity separator again.Because the separative efficiency of cyclone separator and gravity separator is low, so a large amount of dust directly enters the recirculated water washer of postorder, has caused the waste of a large amount of slurries.These washings emit and also can cause serious environmental to pollute.
Causing the inefficient reason of cyclone separator and gravity separator mainly is that the temperature when going out drier is generally at 70-80 ℃ owing to the dust of carrying secretly in the dry gas stream, and the gas temperature that comes out behind subcooler again is at 40-50 ℃.Contain urea, ammonium sulfate, ammonium phosphate, potassium sulfide etc. in the dust that air-flow is being carried secretly during this, run into the dry gas stream entrained water vapor, be condensed into droplet gradually, just formed the granule of dust, seriously influenced the separative efficiency of dust.
At present, also there is not a kind of better technological process that can improve the dust rate of recovery.
Summary of the invention
The recovery technology that the purpose of this invention is to provide dust in a kind of granulating method production composite fertilizer process is to overcome the defective that the recovery technological process of dust falls behind in the granulating method production composite fertilizer process in the prior art, the dust rate of recovery is low.
The present invention adopts, and technical scheme realizes:
The recovery technological process of dust in a kind of granulating method production composite fertilizer process, this technological process may further comprise the steps:
(1) thermal current that has a dust is sent into drier by the hot blast fan by pipeline and is carried out drying;
(2) delivering to cyclone separator through the thermal current of super-dry by pipeline separates;
(3) will deliver to first gravity separator through the thermal current after the cyclone separator initial gross separation;
(4) will deliver to cooler through the thermal current of first gravity separator again cools off;
(5) will deliver to second gravity separator through the cooler cooled gas flow;
(6) will deliver to the recirculated water washer through the air-flow that second gravity separator separates and further separate, then, gas is sent to wastewater treatment working section.
Described first gravity separator, second gravity separator can be the deflector type gravity separators, and the deflector type gravity separator comprises impacting type baffling deduster; The preferably compound bump baffling of described impacting type baffling deduster deduster.
Compared with prior art, the invention has the beneficial effects as follows:
The dust rate of recovery is brought up to 70%-85% by original 30%-40%, and reduce water consumption is up to 50%, small investment, and effect is obvious.
Description of drawings
Fig. 1 is the recovery process flow diagram of dust in the granulating method production of the present invention composite fertilizer process;
Fig. 2 is the recovery process flow diagram of dust in the granulating method production composite fertilizer process in the prior art;
Fig. 3 is the front view of compound bump baffling deduster;
Fig. 4 is the vertical view of compound bump baffling deduster;
Fig. 5 is the left view of compound bump baffling deduster.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing.
As Fig. 1, technology of the present invention, after the thermal current that has dust that the hot blast fan is carried by pipeline is handled through drier, at first to pass through the cyclone separator and first gravity separator to gas, dust separation, make dust concentration reduce greatly, and then carry out cooling processing through subcooler; Like this, just can avoid thermal current effectively the time, form the generation of the phenomenon of dust granule because dust concentration is big with water vapour by cooler; Still the air-flow that is entrained with certain dust concentration of process cooling processing can make the dust content in the air-flow reduce greatly after further separating through second gravity separator again; Whole process can reach about 80% for the rate of recovery of dust.
A key equipment of using among the present invention is the deflector type gravity separator, and the deflector type gravity separator comprises impacting type baffling deduster; Traditional deduster has only dedusting plate one, and is lower to the rate of recovery of particulate dust.The impacting type baffling deduster that uses among the present invention is compound bump baffling deduster, be provided with three deflection plates, rate of recovery height to particulate dust, one side of first deflection plate is provided with first opening, second deflection plate is provided with air vent, and the 3rd deflection plate is provided with second opening with an opposite side of first deflection plate.
Claims (4)
1. the recovery technology of dust in the granulating method production composite fertilizer process is characterized in that may further comprise the steps:
(1) thermal current that has a dust is sent into drier by the hot blast fan by pipeline and is carried out drying;
(2) delivering to cyclone separator through the thermal current of super-dry by pipeline separates;
(3) will deliver to first gravity separator through the thermal current after the cyclone separator initial gross separation;
(4) will deliver to cooler through the thermal current of first gravity separator again cools off;
(5) will deliver to second gravity separator through the cooler cooled gas flow;
(6) will deliver to the recirculated water washer through the air-flow that second gravity separator separates and further separate, then, gas is sent to wastewater treatment working section.
2. the recovery technology of dust in the granulating method production according to claim 1 composite fertilizer process, it is characterized in that: described first gravity separator, second gravity separator are the deflector type gravity separators.
3. the recovery technology of dust in the granulating method production according to claim 2 composite fertilizer process, it is characterized in that: the deflector type gravity separator is an impacting type baffling deduster.
4. the recovery technology of dust in the granulating method production according to claim 3 composite fertilizer process, it is characterized in that: described impacting type baffling deduster is compound bump baffling deduster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101188537A CN101773759B (en) | 2010-03-04 | 2010-03-04 | Recovery process of dust during process of producing compound fertilizer through agglomeration process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101188537A CN101773759B (en) | 2010-03-04 | 2010-03-04 | Recovery process of dust during process of producing compound fertilizer through agglomeration process |
Publications (2)
| Publication Number | Publication Date |
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| CN101773759A true CN101773759A (en) | 2010-07-14 |
| CN101773759B CN101773759B (en) | 2012-07-25 |
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| CN2010101188537A Active CN101773759B (en) | 2010-03-04 | 2010-03-04 | Recovery process of dust during process of producing compound fertilizer through agglomeration process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103495321A (en) * | 2013-08-28 | 2014-01-08 | 中盐安徽红四方股份有限公司 | Novel method for dedusting and recovery on tail gas produced by composite fertilizer production |
| CN104279897A (en) * | 2013-07-09 | 2015-01-14 | 江苏瑞安特重型机械有限公司 | Cooling device |
| CN112704997A (en) * | 2020-12-28 | 2021-04-27 | 浙江英洛华磁业有限公司 | Dust removal recovery system for smelting rare earth and alloy |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201337869Y (en) * | 2008-12-19 | 2009-11-04 | 宁波金远东工业科技有限公司 | Dust removal unit for urea cooling fluidized bed |
| CN201406417Y (en) * | 2009-05-07 | 2010-02-17 | 司振方 | Straw fuel gas purification plant |
-
2010
- 2010-03-04 CN CN2010101188537A patent/CN101773759B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201337869Y (en) * | 2008-12-19 | 2009-11-04 | 宁波金远东工业科技有限公司 | Dust removal unit for urea cooling fluidized bed |
| CN201406417Y (en) * | 2009-05-07 | 2010-02-17 | 司振方 | Straw fuel gas purification plant |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279897A (en) * | 2013-07-09 | 2015-01-14 | 江苏瑞安特重型机械有限公司 | Cooling device |
| CN103495321A (en) * | 2013-08-28 | 2014-01-08 | 中盐安徽红四方股份有限公司 | Novel method for dedusting and recovery on tail gas produced by composite fertilizer production |
| CN112704997A (en) * | 2020-12-28 | 2021-04-27 | 浙江英洛华磁业有限公司 | Dust removal recovery system for smelting rare earth and alloy |
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| Publication number | Publication date |
|---|---|
| CN101773759B (en) | 2012-07-25 |
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Application publication date: 20100714 Assignee: SHANDONG CHINGSHANG CHEMICAL INDUSTRIAL CO.,LTD. Assignor: SHANDONG SANFANG CHEMICAL INDUSTRY GROUP Co.,Ltd. Contract record no.: 2012370000227 Denomination of invention: Recovery process of dust during process of producing compound fertilizer through agglomeration process Granted publication date: 20120725 License type: Exclusive License Record date: 20121108 |
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Denomination of invention: Dust recovery process in the production of compound fertilizer by pellet process Effective date of registration: 20210806 Granted publication date: 20120725 Pledgee: Shandong Junan Rural Commercial Bank Co.,Ltd. Pledgor: SHANDONG SANFANG CHEMICAL INDUSTRY GROUP Co.,Ltd. Registration number: Y2021980007276 |
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Date of cancellation: 20220817 Granted publication date: 20120725 Pledgee: Shandong Junan Rural Commercial Bank Co.,Ltd. Pledgor: SHANDONG SANFANG CHEMICAL INDUSTRY GROUP Co.,Ltd. Registration number: Y2021980007276 |
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