CN101456026B - Material circulation system formed by waste carbide mud residue and alkali-chloride industry - Google Patents
Material circulation system formed by waste carbide mud residue and alkali-chloride industry Download PDFInfo
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- CN101456026B CN101456026B CN2008102200859A CN200810220085A CN101456026B CN 101456026 B CN101456026 B CN 101456026B CN 2008102200859 A CN2008102200859 A CN 2008102200859A CN 200810220085 A CN200810220085 A CN 200810220085A CN 101456026 B CN101456026 B CN 101456026B
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- sodium chloride
- chlorine
- calcium chloride
- carbide slag
- hydrochloric acid
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Abstract
The invention discloses a material circulating system formed by waste acetylene sludge and the chlor-alkali industry. The system comprises: pretreated waste acetylene sludge is reacted with hydrochloric acid, the reaction product is filtered to obtain a calcium chloride solution; the filtrate is reacted with sodium hydroxide generated by electrolysis of a chlor-alkali factory to generate high-purity calvital; the calvital is chloridized, centrifugated, dried and crushed to prepare bleaching powder; and filter cakes are reacted with the hydrochloric acid to generate active carbon. The calcium chloride generated in the reaction can be prepared into calcium chloride dihydrate and anhydrous calcium chloride; and sodium chloride after treatment can be taken as a raw material for electrolysis. The material circulating system effectively solves the problem of treating the waste acetylene sludge and raw material problem in the chlor-alkali industry, embodies recycling economy; and byproducts of the bleaching powder and the active carbon and calcium chloride dihydrate products improve deep processing capacity of an enterprise.
Description
Technical field
The present invention relates to three industrial wastes comprehensive utilization technique field, especially relate to the method that a kind of useless carbide slag utilizes in chlorine industry.
Background technology
The spent material calcium carbide slag of acetylene vapor phase method synthesizing polyvinyl chloride industry discharging generally adopts at present and buries behind natural subsidence or the filter-press dehydration or stack, and these processing modes take a large amount of soils and serious environment pollution.Produce NaOH and chlorine in this while chlorine industry electrolytic saltwater, need to consume a large amount of saline solutions, if the solid waste of acetylene vapor phase method synthesizing polyvinyl chloride industry and the material combination of chlorine industry can be utilized, to be inorganic chemical industry and the recycling model of organic chemical industry's three wastes, also be the direction of present environmental pollution improvement.
Summary of the invention
The purpose of this invention is to provide the method that a kind of useless carbide slag utilizes in chlorine industry, the method has realized the recycling of the useless carbide slag and the chlorine industry three wastes effectively.
For achieving the above object, technical scheme of the present invention is: the method that a kind of useless carbide slag utilizes in chlorine industry, chlorine industry potroom electrolytic sodium chloride, product is a NaOH in the refining workshop of NaOH, product is a chlorine between the chlorine collecting cart, NaOH, chlorine and useless carbide slag produce in the workshop at sodium chloride and finally generate sodium chloride solution through a series of chemical reaction, and sodium chloride solution returns potroom, so form circulation; The product process of the sodium chloride in the described workshop is:
Carbide slag and water are by weight 1: 2-6 injects the preprocessor that has agitating device and stirs and become uniform emulsion, natural subsidence 20-50 second, forms the calcium hydroxide emulsion that suspends; Calcium hydroxide emulsion and hydrochloric acid are pressed pure material quality 1: 0.6-1.2 and are injected clarifier, stir to make material reach complete reaction in 10-15 minute, behind the reactant liquor suction filtration, form calcium chloride filtrate and filter cake; The NaOH that calcium chloride filtrate and electrolysis generate injects in the auxiliary reactor by pure material quality 1: 0.4-1.1 and stirs, and generates high-purity hydrogen calcium oxide and sodium chloride solution, and the principles of chemistry are as follows:
Ca(OH)
2+2HCl＝CaCl
2+2H
2O；
CaCl
2+2NaOH＝Ca(OH)
2+NaCl；
Sodium chloride solution is sent into potroom after soda ash, salt acid treating to carry out potroom recycling, and the electrolysis equation is as follows:
NaCl＝Na
++Cl
-
H
2O＝H
++OH
-
Na
++OH
-＝NaOH
H
++H
+＝H
2
Cl
-+Cl
-＝Cl
2
The high-purity hydrogen calcium oxide washs three times with clear water, be admitted in the main reactor then, wherein feeding chlor-alkali plant electrolysis generation chlorine uniformly by pure material amount 1: 0.4-1.1 stirs, reaction generates white precipitate and calcium chloride solution, with cl gas flow scale Numerical Control reaction end, go up reading when table and stop to be the chlorination terminal point when constant, precipitation is sent into the drying machine drying after separating with centrifuge, through crushing packing the bleaching powder finished product, the principles of chemistry are as follows:
8Ca(OH)
2+6Cl
2＝3Ca(ClO)
2·2Ca(OH)
2·2H
2O+3CaCl
2+4H
2O；
The hydrochloric acid solution of filter cake and concentration 5-15% reacts, and reaction result will make the hydrochloric acid surplus, filters, and filter residue washs with clear water, handles the active carbon goods that promptly obtain high-quality with zinc chloride activation, and the principles of chemistry are as follows: [Ca (OH)
2+ C]+2HCI=CaCl
2+ 2H
2O+C;
Calcium chloride is made calcium chloride dihydrate and anhydrous chlorides of rase calcium product through centrifuge and distiller.
The present invention has effectively solved the processing handling problems of useless carbide slag and the raw material problem of chlorine industry, has embodied recycling economy, makes enterprise get rid of the big burden of the three wastes, finally allows enterprise reach the basic goal of zero-emission.Allow enterprise greatly reduce production cost, improved the economic benefit of producing.The present invention has also improved enterprise product structure and kind, allows waste material become bleaching powder and the active carbon and the calcium chloride dihydrate product of high added value, has improved the ability of enterprise's deep processing.
Description of drawings
Fig. 1: the present invention's schematic diagram that circulates
The terminal (sodium chloride electrolyte) of 1-chlor-alkali plant potroom material circulating system,
2-NaOH is made with extra care workshop (NaOH product),
Between 3-chlorine collecting cart (chlorine product),
4-sodium chloride produces the workshop
Fig. 2: the process chart in the workshop 4
The 5-preprocessor, the 6-clarifier, the 7-auxiliary reactor,
The 8-main reactor, 9-centrifuge, 10-drying machine
11-calcium centrifuge, 12-calcium chloride distiller.
The specific embodiment
To describe preferred embodiment of the present invention below, but content of the present invention is not limited to this fully.
Embodiment 1
(calcium hydroxide content is 85% to the 100kg carbide slag; The siccative meter) and 300kg water inject the preprocessor 5 have agitating device and stir and become uniform emulsion, natural subsidence 30s forms the calcium hydroxide emulsion that suspends; Calcium hydroxide emulsion and hydrochloric acid are pressed the pure material quality and are injected clarifier 6 at 1: 0.8, stir to make material reach complete reaction in 10 minutes, behind the reactant liquor suction filtration, form calcium chloride filtrate and filter cake; The NaOH that calcium chloride filtrate and electrolysis generate is pressed the pure material quality and is injected 7 li stirrings of auxiliary reactor at 1: 0.6, generate high-purity hydrogen calcium oxide and purer sodium chloride solution and contain solute 93.28kg, sodium chloride solution is through soda ash, sending into potroom after the salt acid treating, to carry out potroom recycling, the high-purity hydrogen calcium oxide washs three times with clear water, be admitted to 8 li of main reactors then, wherein uniformly feeding chlor-alkali plant electrolysis generation chlorine at 1: 0.7 by the pure material amount stirs, reaction generates white precipitate and calcium chloride solution, with cl gas flow scale Numerical Control reaction end, when table is the chlorination terminal point when upward reading is constant, precipitation is sent into drying machine 10 dryings after separating with centrifuge 9, through crushing packing bleaching powder finished product 59.04kg, the hydrochloric acid solution of filter cake and concentration 10% reacts, reaction result will make the hydrochloric acid surplus, filter, filter residue washs with clear water, handle the active carbon goods 6kg that promptly obtains high-quality with zinc chloride activation, calcium chloride is made the 35.77kg calcium chloride dihydrate through centrifuge 11 and distiller 12.
Embodiment 2
Technological process such as embodiment 1, (calcium hydroxide content is 85% to the 100kg carbide slag; The siccative meter) and 600kg water, natural subsidence 50s, calcium hydroxide emulsion and Ao's acid were pressed the pure material quality 1: 1.2, stirred 10 minutes, the NaOH that calcium chloride filtrate and electrolysis generate was pressed the pure material quality 1: 1.1, make purer sodium chloride solution and contain solute 134.39kg, high-purity hydrogen calcium oxide and chlorine pure material amount 1: 1.1, bleaching powder finished product 87.44kg, the hydrochloric acid solution of filter cake and concentration 10% reacts, promptly obtain the active carbon goods 6kg of high-quality, make the 52.98kg calcium chloride dihydrate.
Embodiment 3
Technological process such as embodiment 1, (calcium hydroxide content is 85% to the 100kg carbide slag; The siccative meter) and 200kg water, natural subsidence 20s, calcium hydroxide emulsion and hydrochloric acid were pressed the pure material quality 1: 0.6, stirred 10 minutes, the NaOH that calcium chloride filtrate and electrolysis generate was pressed the pure material quality 1: 0.4, make purer sodium chloride solution and contain solute 46.64kg, high-purity hydrogen calcium oxide and chlorine pure material amount 1: 0.4, bleaching powder finished product 16.87kg, the hydrochloric acid solution of filter cake and concentration 10% reacts, promptly obtain the active carbon goods 6kg of high-quality, make the 10.22kg calcium chloride dihydrate.
Claims (4)
1. method that useless carbide slag utilizes in chlorine industry, it is characterized in that chlorine industry potroom (1) electrolytic sodium chloride, product is a NaOH in the refining workshop (2) of NaOH, (3) product is a chlorine between the chlorine collecting cart, NaOH, chlorine and useless carbide slag produce in the workshop (4) at sodium chloride and finally generate sodium chloride solution through a series of chemical reaction, sodium chloride solution returns potroom (1), so forms circulation; The product process that described sodium chloride produces the sodium chloride in the workshop (4) is:
Carbide slag and water are by weight 1: 2-6 injects the preprocessor (5) that has agitating device and stirs and become uniform emulsion, natural subsidence 20-50 second, forms the calcium hydroxide emulsion of suspension; Calcium hydroxide emulsion and hydrochloric acid are pressed pure material quality 1: 0.6-1.2 and are injected clarifier (6), stir to make material reach complete reaction in 10-15 minute, behind the reactant liquor suction filtration, form calcium chloride filtrate and filter cake; The NaOH that calcium chloride filtrate and electrolysis generate is pressed pure material quality 1: 0.4-1.1 and is injected the stirring of auxiliary reactor (7) lining, generates high-purity hydrogen calcium oxide and sodium chloride solution.
2. the method utilized in chlorine industry of the described a kind of useless carbide slag of claim 1, it is characterized in that sending into potroom by described sodium chloride solution after soda ash, salt acid treating, to carry out potroom recycling.
3. the method in chlorine industry, utilized of the described a kind of useless carbide slag of claim 1, it is characterized in that described high-purity hydrogen calcium oxide washs three times with clear water, be admitted to main reactor (8) lining then, wherein feeding chlor-alkali plant electrolysis generation chlorine uniformly by pure material amount 1: 0.4-1.1 stirs, reaction generates white precipitate and calcium chloride solution, with cl gas flow scale Numerical Control reaction end, when table is the chlorination terminal point when upward reading is constant, send into drying machine (10) drying after precipitation is separated with centrifuge (9), through crushing packing the bleaching powder finished product.
4. the method in chlorine industry, utilized of the described a kind of useless carbide slag of claim 1, the hydrochloric acid solution that it is characterized in that described filter cake and concentration 5-15% reacts, reaction result will make the hydrochloric acid surplus, filter, filter residue washs with clear water, handles the active carbon goods that promptly obtain high-quality with zinc chloride activation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102200859A CN101456026B (en) | 2008-12-18 | 2008-12-18 | Material circulation system formed by waste carbide mud residue and alkali-chloride industry |
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|---|---|---|---|
| CN2008102200859A CN101456026B (en) | 2008-12-18 | 2008-12-18 | Material circulation system formed by waste carbide mud residue and alkali-chloride industry |
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|---|---|
| CN101456026A CN101456026A (en) | 2009-06-17 |
| CN101456026B true CN101456026B (en) | 2010-08-18 |
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| CN2008102200859A Expired - Fee Related CN101456026B (en) | 2008-12-18 | 2008-12-18 | Material circulation system formed by waste carbide mud residue and alkali-chloride industry |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792158A (en) * | 2009-07-17 | 2010-08-04 | 王嘉兴 | Method for producing granular sodium hydroxide solution to co-produce calcium carbonate by using carbide slag |
| CN101792166A (en) * | 2009-07-17 | 2010-08-04 | 王嘉兴 | Method for producing blocky sodium hydroxide and calcium carbonate by using carbide slag |
| CN105948092A (en) * | 2016-05-09 | 2016-09-21 | 聂国印 | Recycling method of carbide slag in chlor-alkali industry |
| CN110565172B (en) * | 2019-09-19 | 2021-09-21 | 宜宾天原集团股份有限公司 | Calcium sulfate whisker and production method of calcium sulfate as raw material thereof |
| CN113321187B (en) * | 2021-05-24 | 2023-03-31 | 中国成达工程有限公司 | Method for producing bleaching powder by using wet-process acetylene waste calcium carbide slag slurry |
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Address after: 523000, room five, building 508, Jinhai building, Dongcheng District Tong Road, Dongguan, Guangdong Patentee after: Wang Jiaxing Address before: Wushi Village Primary School in Dongguan city of Dongcheng District province Guangdong road 523000 Lane 1 No. 6 main mountain Patentee before: Wang Jiaxing |
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