CN101015765A - Technique for preparing powdery deacidification agent from pasty alkaline waste slag - Google Patents
Technique for preparing powdery deacidification agent from pasty alkaline waste slag Download PDFInfo
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- CN101015765A CN101015765A CN 200610053257 CN200610053257A CN101015765A CN 101015765 A CN101015765 A CN 101015765A CN 200610053257 CN200610053257 CN 200610053257 CN 200610053257 A CN200610053257 A CN 200610053257A CN 101015765 A CN101015765 A CN 101015765A
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Abstract
The invention relates to a method for preparing sully alkali waste slag into powder deacidifying agent, comprising that adding wet alkali waste slag into blade drier, using thermal medium at 160-350Deg. C to indirectly dry, breaking the dried material in a breaker, using hot air to feed the material into rough/fine separator, while the smaller particles are fed into a separator to be collected into a final-product chamber, removing the dust of hot air via a cloth-bag dust cleaner to be discharge, and the larger particles are feedback to the breaker to be broken. The invention can prepare slurry alkali waste slag into deacidifying agent used in dry smoke desulfuration technique.
Description
Affiliated technical field
The present invention relates to a kind of technology that the pasty alkaline waste residue is prepared into the powdery deacidification agent.
Background technology
In using processes such as fossil fuel or incineration of waste, can produce SO
x, sour gas such as HF, HCl, as directly entering atmosphere, can form environmental pollution.The deacidification agent that purifies the dry method depickling technology employing of these waste gas is mainly powdery calcium hydroxide, quality requirements: purity is greater than 85%, and particle diameter is less than 50 microns, and moisture content is less than 3%, and specific area is greater than 15m
2/ g, as directly using commodity calcium hydroxide, price is more expensive.The wet type cream pasty alkaline waste residue that produces in the Chemical Manufacture (allowing maximum water holding capacity 45%) can be used as the deacidification agent in the waste gas purification fully by drying and after pulverizing, can replace commercial calcium hydroxide.The invention discloses and a kind of the pasty alkaline waste residue is prepared into the technology of powdery deacidification agent, alkaline scrap material is prepared into deacidification agent.
The conventional air drying process is used for the drying of powder material, is made up of with the output section heat supply part, drying nest, feeding part, air draft part usually.Heat supply partly provides the hot-air with uniform temperature and flow velocity, enters drying nest, and material also enters drying nest by feeding part.Drying nest mainly is made of dry pipeline or fluid bed, ebullated bed and auxiliary equipment.Material cis or contrary formula contact with air-flow, carry out preheating and drying, and because of air-flow and material contact-making surface are big, lack drying time, is widely used.But mainly there are three shortcomings in this drying process, and at first heat supply partly needs burner that thermal medium is provided, the cost height, and expense is big.Secondly, heat waste is bigger, because the heat energy that dried tail gas is taken away utilizes difficulty most, system thermal efficiency is low.The 3rd, dry materials is inhomogeneous, and is easily bonding at dry wall, fluctuation of service.
Summary of the invention
In order to overcome the deficiency of existing drying process, the invention provides a kind of new drying technique that adopts hollow paddle thermal medium indirect, the higher alkaline scrap material of water capacity is prepared into the technology of dry type deacidification agent.
The technical solution adopted for the present invention to solve the technical problems is: cream pasty alkaline waste residue is added blade dryer, carry out heat drying with 160～350 ℃ of hot coal media, dried material enters pulverizer and pulverizes, reusable heat air wind is delivered to slightly/the subfractionation device, separate thinner particle and delivered to separator by wind, the particle that particle diameter meets the requirement of dry type deacidification agent enters finished bin, tail gas then discharges through after the sack cleaner dedusting, still enters the pulverizer inlet through thick/coarse granule that the subfractionation device separates and carries out powder process.
The invention has the beneficial effects as follows: the pasty alkaline waste residue is prepared into the satisfactory deacidification agent that exhaust emission is administered that is used for, realizes the treatment of wastes with processes of wastes against one another, important economic results in society are arranged.The deacidification agent cost that is used in waste gas purification reduces greatly.And the deacidification agent uniform drying that this technology makes, quality is good.Because the oar blade type drier that adopts is the heat-conducting type drier, is applicable to the drying of special wet stock, has the dry tenacity height, heat loss is little, the characteristics that the thermal efficiency is high.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a process flow diagram of the present invention.
Among the figure 1, feeding hopper, 2, engagement type multiaxis screw(-type) feeder, 3, blade dryer, 4, screw(-type) feeder, 5, pulverizer, 6, thick/the subfractionation machine, 7, pneumatic carrier, 8, separator, 9, sack cleaner, 10, air-introduced machine, 11, finished bin, 12, pressure fan, 13, heater, 14, wet scrubber, 15, exhaust blower.
The specific embodiment
In the drawings, water content is the alkaline scrap material of about 40% (weight), with the loading machine feeding hopper (1) of packing into, through engagement type multiaxis screw(-type) feeder (2), make wet feed enter interior heating blade dryer (3) continuously and stably, under 160-350 ℃ hot coal medium indirect, make the water evaporates drying, moisture evaporated in the drying, do carrier gas by the hot-air after pressure fan (12) air blast heater via (13) heating, after entering wet scrubber (14) dedusting under the effect of exhaust blower (15), discharge.Dried material joins pulverizer (5) through screw(-type) feeder (4) and carries out powder process, and delivered to slightly/subfractionation machine (6) from the next hot-air wind of heater (13), thinner material is sent to separator (8) after the separation, the particle that particle diameter meets the deacidification agent requirement enters finished bin (11), tail gas is then through the air draught of air-introduced machine (10), discharge after entering sack cleaner (9) dedusting, deduster (9) removes the powder that gets off and still enters finished bin (11).By slightly/subfractionation machine 6 separates the inlet that thicker material is returned to pulverizer 5.
Claims (6)
1, a kind of technology that the pasty alkaline waste residue is prepared into the powdery deacidification agent, it is characterized in that: cream pasty alkaline waste residue is delivered to blade dryer (3) inner drying with engagement type multiaxis screw(-type) feeder (2), again through pulverizer (5) and thick/subfractionation machine (6) classification powder process, make a kind of water content less than 3%, particle diameter is less than 15 μ m, and specific area reaches 20m
2The powdery deacidification agent of/g.
2, by the described technology of claim 1, it is characterized in that: engagement type multiaxis screw(-type) feeder (2) is adopted in the charging of wet type alkaline scrap material, makes the charging continous-stable.
3, by the described technology of claim 1, it is characterized in that: drying nest adopts the interior empty blade dryer (3) of hot coal medium indirect, and the dry steam that produces effluxes displacement by hot-air as carrier.
4, by the described technology of claim 1, it is characterized in that: powder process partly adopts pulverizer (5) and thick/subfractionation machine (6) to combine, and makes coarse fodder be restored to pulverizer (5) inlet, and fines enters pneumatic carrier (7).
5, by the described technology of claim 1, it is characterized in that: from the gas-solid mixture that pneumatic carrier (7) comes, realize gas solid separation under separator (8) effect, tail gas is by sack cleaner (9) discharging.
6, use by the deacidification agent of claim 1-5, it is characterized in that: described deacidification agent is sprayed in the waste gas, to remove the acidic components in the waste gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610053257 CN101015765A (en) | 2006-09-04 | 2006-09-04 | Technique for preparing powdery deacidification agent from pasty alkaline waste slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610053257 CN101015765A (en) | 2006-09-04 | 2006-09-04 | Technique for preparing powdery deacidification agent from pasty alkaline waste slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101015765A true CN101015765A (en) | 2007-08-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610053257 Pending CN101015765A (en) | 2006-09-04 | 2006-09-04 | Technique for preparing powdery deacidification agent from pasty alkaline waste slag |
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| CN (1) | CN101015765A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103160285A (en) * | 2013-03-29 | 2013-06-19 | 广东大众农业科技股份有限公司 | Method for producing soil conditionert by utilizing subparticles in thick weather |
| CN111841295A (en) * | 2020-07-24 | 2020-10-30 | 北京予知环保科技有限公司 | Deacidifying agent composition, deacidifying agent, preparation method and application thereof |
-
2006
- 2006-09-04 CN CN 200610053257 patent/CN101015765A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103160285A (en) * | 2013-03-29 | 2013-06-19 | 广东大众农业科技股份有限公司 | Method for producing soil conditionert by utilizing subparticles in thick weather |
| CN103160285B (en) * | 2013-03-29 | 2015-09-02 | 广东大众农业科技股份有限公司 | A kind of method utilizing the subparticle in thick weather to produce soil conditioner |
| CN111841295A (en) * | 2020-07-24 | 2020-10-30 | 北京予知环保科技有限公司 | Deacidifying agent composition, deacidifying agent, preparation method and application thereof |
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