CN109663392A - A kind of process that carbide slag slurries are separated by solid-liquid separation - Google Patents
A kind of process that carbide slag slurries are separated by solid-liquid separation Download PDFInfo
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- CN109663392A CN109663392A CN201910113828.0A CN201910113828A CN109663392A CN 109663392 A CN109663392 A CN 109663392A CN 201910113828 A CN201910113828 A CN 201910113828A CN 109663392 A CN109663392 A CN 109663392A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
- B01D21/262—Separation of sediment aided by centrifugal force or centripetal force by using a centrifuge
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Abstract
A kind of process that carbide slag slurries are separated by solid-liquid separation, technique including carbide slag slurries twice dehydration, i.e. carbide slag slurries first pass through concentration basin and carry out the carbide slag that the obtained solid content of initial concentration is 21-30wt%, pass through the dehydration of horizontal spiral centrifuge again, finally obtain the calcium carbide slag filter material and clear liquid II that solid content is 55-65wt%, again because in clear liquid II because of solid content 2-3wt%, influence the reuse of clear liquid II, clear liquid II is then returned into concentration basin, it is concentrated simultaneously with carbide slag slurries, it returns in acetylene preparation facilities and is utilized after being down to 1wt% or less from the solid content for the clear liquid I that concentration basin is isolated.The present invention, which is one, can effectively overcome shortcoming and deficiency in the prior art, and realizing improves working environment, and will not introduce new impurity, the method utilized to carbide slag resource recycling.
Description
Technical field
The present invention relates to the processes that a kind of carbide slag slurries are separated by solid-liquid separation, and belong to Application in Chemical Engineering technical field.
Background technique
Carbide slag is the calcium carbide CaC in the production process of the industrial products such as acetylene gas2The industrial residue generated after hydrolysis,
Main component is Ca (OH)2.The carbide slag slurries moisture being discharged from acetylene generator is up to 90wt% or more, calcium carbide solid impurity particle
It is very thin, there is stronger water-retaining property.As national energy conservation and emission reduction, the policy of waste utilization are constantly reinforced, done using carbide slag
Raw material substitutes lime stone production cement, carbide raw material etc. and is increasingly paid attention to by people.
Wherein the dehydration problem of carbide slag slurries is always that raw material disposal first has to solve the problems, such as, present comparative maturity
Carbide slag slurries dewatering type is plate compression, its advantage is that the carbide slag moisture content after separating treatment is about 30-35wt%, it is aqueous
Rate is lower.But plate and frame filter press the degree of automation is lower, the filtrate and periodic replacement filter cloth for needing hand fit to clear up on filter cloth, people
Member's manipulation strength is larger；Plate and frame filter press is semi-enclosed structure, a large amount of in device operational process because of about 80 DEG C of carbide slag temperature
Alkaline vapor diffuse, not only equipment is caused to corrode, occupational health situation is poor.
There are also in such a way that horizontal spiral centrifuge is dehydrated, but because containing thin in dewatered clear liquid
Small particulate matter affects the recycling of clear liquid.To the effect for guaranteeing to be separated by solid-liquid separation, flocculation need to be added in carbide slag
Agent, but flocculant is mostly organic matter, flocculant, which is added, will lead to the complicated component in carbide slag and clear liquid, be added impurity from
Son causes the purity of calcium oxide to reduce, is unfavorable for producing.
Therefore, it is necessary to a kind of processes that new carbide slag slurries are separated by solid-liquid separation, and can overcome the work of plate compression
The disadvantage of environment difference will not introduce new impurity again.
Summary of the invention
A kind of process that carbide slag slurries are separated by solid-liquid separation, the technique including carbide slag slurries twice dehydration, i.e. carbide slag slurries
It first passes through concentration basin and carries out the obtained solid content of initial concentration as the carbide slag slurries of 21-30wt%, then pass through horizontal spiral centrifuge
Dehydration, finally obtain solid content be 55-65wt% calcium carbide slag filter material and clear liquid II, and because in clear liquid II solid content be about 2-
3wt% influences the recycling of clear liquid II, then send clear liquid II and return into concentration basin, is concentrated simultaneously with carbide slag slurries, from concentration basin
The solid content for the clear liquid I isolated is down to 1wt% and is utilized in acetylene generator hereinafter, returning.
A kind of process that carbide slag slurries are separated by solid-liquid separation, mainly comprises the steps that
(1) carry out concentration to carbide slag slurries: carbide slag slurries carry out concentration in concentration basin, and obtained solid content is
The carbide slag and clear liquid I of 21-30wt%；
(2) dehydration: using horizontal spiral centrifuge, carries out at dehydration to the carbide slag obtained after step (1) concentration
Calcium carbide slag filter material and clear liquid II that solid content is 55-65wt% is made in reason；
(3) clear liquid recycles: the clear liquid II that step (2) is obtained is sent into the concentration basin in step (1)；
(4) clear liquid reuse: by concentration basin in step (1) in concentration carbide slag liquid process, the clear liquid I isolated is sent into
It is utilized in acetylene generator.
Wherein, the solid content of the carbide slag slurries in the step (1) is 6-15wt%.
Wherein, the solid content of the carbide slag slurries in the step (1) is 8-12wt%.
Preferably, the solid content of carbide slag obtained is 21wt% in the step (1).
Preferably, the solid content of carbide slag obtained is 30wt% in the step (1).
Wherein, the solid content of clear liquid II is 2-3wt% in the step (2).
Preferably, the solid content of clear liquid II is 3wt% in the step (2).
Preferably, the solid content of calcium carbide slag filter material is 65wt% in the step (3).
Preferably, the solid content of step (3) the calcium carbide slag filter material is 55wt%.
Wherein, the solid content of clear liquid I is≤1wt% in the step (4).
The utility model has the advantages that
1. compared with plate compression carries out carbide slag slurries dehydration treatment method, the advantages of this technique is to improve operation ring
Border.
2. compared with existing use horizontal spiral centrifuge carries out dehydration not needing that flocculation is added in carbide slag slurries
Agent.Because flocculant is mostly organic matter, flocculant, which is added, will lead to the complicated component in carbide slag and clear liquid, be added impurity from
Son causes the purity of calcium oxide to reduce, is unfavorable for producing.
Detailed description of the invention
Fig. 1 is process flow diagram of the invention.
Specific embodiment
Below with reference to embodiment, the invention will be further described, and embodiments of the present invention include but is not limited to following reality
Apply example.
Embodiment 1:
As shown in Figure 1, the process that a kind of carbide slag slurries are separated by solid-liquid separation, the process the following steps are included:
(1) carry out concentration to carbide slag slurries: to from the resulting carbide slag slurries of acetylene generator, solid content is
6wt%, carbide slag slurries carry out concentration in concentration basin, and carbide slag and clear liquid I that solid content is 21wt% is made；
(2) dehydration: using horizontal spiral centrifuge, the calcium carbide for being 21wt% to the solid content after step (1) concentration
Slag is carried out dehydrating, and calcium carbide slag filter material and clear liquid II that solid content is 55wt% is made, and II solid content of clear liquid is 2wt%；
(3) clear liquid recycles: the solid content that step (2) is obtained is the concentration basin that 2wt% clear liquid II is sent into step (1),
It is mixed with the carbide slag slurries in step (1) and carries out concentration；
(4) clear liquid reuse: the clear liquid I that the mixture of clear liquid II in step (3) and carbide slag slurries is concentrated and separated out contains
Gu amount is 0.5wt%, it is sent into acetylene generator and is recycled.
Embodiment 2:
As shown in Figure 1, the process that a kind of carbide slag slurries are separated by solid-liquid separation, the process the following steps are included:
(1) carry out concentration to carbide slag slurries: to from the resulting carbide slag slurries of acetylene generator, solid content is
8%, carbide slag slurries carry out concentration in concentration basin, and carbide slag and clear liquid I that solid content is 23wt% is made；
(2) dehydration: using horizontal spiral centrifuge, the calcium carbide for being 23wt% to the solid content after step (1) concentration
Slag is carried out dehydrating, and calcium carbide slag filter material and clear liquid II that solid content is 58wt% is made, and II solid content of clear liquid is 2.2wt%；
(3) clear liquid recycles: the solid content that step (2) is obtained is the concentration that 2.2wt% clear liquid II is sent into step (1)
Carbide slag slurries in pond, with step (1), which are mixed, carries out concentration；
(4) clear liquid reuse: the clear liquid I that the mixture of clear liquid II in step (3) and carbide slag slurries is concentrated and separated out contains
Gu amount is 0.6wt%, it is sent into acetylene generator and is recycled.
Embodiment 3:
As shown in Figure 1, the process that a kind of carbide slag slurries are separated by solid-liquid separation, the process the following steps are included:
(1) carry out concentration to carbide slag slurries: to from the resulting carbide slag slurries of acetylene generator, solid content is
10%, carbide slag slurries carry out concentration in concentration basin, and carbide slag and clear liquid I that solid content is 25wt% is made；
(2) dehydration: using horizontal spiral centrifuge, the calcium carbide for being 25wt% to the solid content after step (1) concentration
Slag is carried out dehydrating, and calcium carbide slag filter material and clear liquid II that solid content is 60wt% is made, and II solid content of clear liquid is 2.5wt%；
(3) clear liquid recycles: the solid content that step (2) is obtained is the concentration that 2.5wt% clear liquid II is sent into step (1)
Carbide slag slurries in pond, with step (1), which are mixed, carries out concentration；
(4) clear liquid reuse: the clear liquid I that the mixture of clear liquid II in step (3) and carbide slag slurries is concentrated and separated out contains
Gu amount is 0.7wt%, it is sent into acetylene generator and is recycled.
Embodiment 4:
As shown in Figure 1, the process that a kind of carbide slag slurries are separated by solid-liquid separation, the process the following steps are included:
(1) carry out concentration to carbide slag slurries: to from the resulting carbide slag slurries of acetylene generator, solid content is
12%, carbide slag slurries carry out concentration in concentration basin, and carbide slag and clear liquid I that solid content is 27wt% is made；
(2) dehydration: using horizontal spiral centrifuge, the calcium carbide for being 27wt% to the solid content after step (1) concentration
Slag is carried out dehydrating, and calcium carbide slag filter material and clear liquid II that solid content is 62wt% is made, and II solid content of clear liquid is 2.8wt%；
(3) clear liquid recycles: the solid content that step (2) is obtained is the concentration that 2.8wt% clear liquid II is sent into step (1)
Carbide slag slurries in pond, with step (1), which are mixed, carries out concentration；
(4) clear liquid reuse: the clear liquid I that the mixture of clear liquid II in step (3) and carbide slag slurries is concentrated and separated out contains
Gu amount is 0.85wt%, it is sent into acetylene generator and is recycled.
Embodiment 5:
As shown in Figure 1, the process that a kind of carbide slag slurries are separated by solid-liquid separation, the process the following steps are included:
(1) carry out concentration to carbide slag slurries: to from the resulting carbide slag slurries of acetylene generator, solid content is
15%, carbide slag slurries carry out concentration in concentration basin, and carbide slag and clear liquid I that solid content is 30wt% is made；
(2) dehydration: using horizontal spiral centrifuge, the calcium carbide for being 30wt% to the solid content after step (1) concentration
Slag is carried out dehydrating, and calcium carbide slag filter material and clear liquid II that solid content is 65wt% is made, and II solid content of clear liquid is 3wt%；
(3) clear liquid recycles: the solid content that step (2) is obtained is the concentration basin that 3wt% clear liquid II is sent into step (1),
It is mixed with the carbide slag slurries in step (1) and carries out concentration；
(4) clear liquid reuse: the clear liquid I that the mixture of clear liquid II in step (3) and carbide slag slurries is concentrated and separated out contains
Gu amount is 1wt%, it is sent into acetylene generator and is recycled.
Claims (10)
1. the process that a kind of carbide slag slurries are separated by solid-liquid separation, which is characterized in that the process the following steps are included:
(1) carry out concentration to carbide slag slurries: carbide slag slurries carry out concentration in concentration basin, and it is 21- that solid content, which is made,
The carbide slag and clear liquid I of 30wt%；
(2) dehydration: using horizontal spiral centrifuge, is carried out dehydrating, makes to the carbide slag obtained after step (1) concentration
Obtain the calcium carbide slag filter material and clear liquid II that solid content is 55-65wt%；
(3) clear liquid recycles: the clear liquid II that step (2) is obtained is sent into the concentration basin in step (1)；
(4) clear liquid reuse: by concentration basin in step (1) during carbide slag slurries are concentrated, the clear liquid I isolated is sent into acetylene hair
It is utilized in generating apparatus.
2. the process that a kind of carbide slag slurries as described in claim 1 are separated by solid-liquid separation, which is characterized in that the step (1)
In carbide slag slurries solid content be 6-15wt%.
3. the process that a kind of carbide slag slurries as claimed in claim 2 are separated by solid-liquid separation, which is characterized in that the step (1)
In carbide slag slurries solid content be 8-12wt%.
4. the process that a kind of carbide slag slurries as described in claim 1 are separated by solid-liquid separation, which is characterized in that the step (1)
In the solid content of carbide slag obtained be 21wt%.
5. the process that a kind of carbide slag slurries as described in claim 1 are separated by solid-liquid separation, which is characterized in that the step (1)
In the solid content of carbide slag obtained be 30wt%.
6. the process that a kind of carbide slag slurries as described in claim 1 are separated by solid-liquid separation, which is characterized in that the step (2)
The solid content of middle clear liquid II is 2-3wt%.
7. the process that a kind of carbide slag slurries as claimed in claim 6 are separated by solid-liquid separation, which is characterized in that the step (2)
The solid content of middle clear liquid II is 3wt%.
8. the process that a kind of carbide slag slurries as described in claim 1 are separated by solid-liquid separation, which is characterized in that the step (3)
The solid content of middle calcium carbide slag filter material is 65wt%.
9. the process that a kind of carbide slag slurries as described in claim 1 are separated by solid-liquid separation, which is characterized in that the step (3)
The solid content of calcium carbide slag filter material is 55wt%.
10. the process that a kind of carbide slag slurries as described in claim 1 are separated by solid-liquid separation, which is characterized in that clear in (4)
The solid content of liquid I is≤1wt%.
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| CN201910113828.0A CN109663392A (en) | 2019-02-14 | 2019-02-14 | A kind of process that carbide slag slurries are separated by solid-liquid separation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110395812A (en) * | 2019-08-21 | 2019-11-01 | 英德市西洲气体有限公司 | A kind of the carbide slag processing method and system of centrifuge |
| CN110801669A (en) * | 2019-10-12 | 2020-02-18 | 西安交通大学 | Three-phase separation system and method with self-cleaning and residue dewatering functions |
| CN110898469A (en) * | 2019-11-27 | 2020-03-24 | 宜宾天原集团股份有限公司 | Method for prolonging service life of filter cloth in carbide slag slurry filter pressing process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110395812A (en) * | 2019-08-21 | 2019-11-01 | 英德市西洲气体有限公司 | A kind of the carbide slag processing method and system of centrifuge |
| CN110801669A (en) * | 2019-10-12 | 2020-02-18 | 西安交通大学 | Three-phase separation system and method with self-cleaning and residue dewatering functions |
| CN110898469A (en) * | 2019-11-27 | 2020-03-24 | 宜宾天原集团股份有限公司 | Method for prolonging service life of filter cloth in carbide slag slurry filter pressing process |
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