CN217593692U - Pretreatment device for treating cyanide-containing waste residues - Google Patents
Pretreatment device for treating cyanide-containing waste residues Download PDFInfo
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- CN217593692U CN217593692U CN202220607715.3U CN202220607715U CN217593692U CN 217593692 U CN217593692 U CN 217593692U CN 202220607715 U CN202220607715 U CN 202220607715U CN 217593692 U CN217593692 U CN 217593692U
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Abstract
The utility model relates to a pretreatment device for disposing cyanide-containing waste residues, which comprises a primary cyanogen breaking device, a secondary cyanogen breaking device and a stirring reaction device which are arranged in sequence, wherein a waste gas treatment device is arranged above the primary cyanogen breaking device, the secondary cyanogen breaking device and the stirring reaction device; the upper part of the first-stage cyanogen breaking device is connected with a sodium hydroxide solution storage tank and a sodium hypochlorite solution storage tank, and the upper part of the first-stage cyanogen breaking device is also connected with a cyanide-containing waste residue storage tank; a discharge port at the lower part of the first-stage cyanogen breaking device is connected with a feed port at the upper part of the second-stage cyanogen breaking device; the upper part of the secondary cyanogen breaking device is connected with a sodium hypochlorite solution storage tank, the upper part of the secondary cyanogen breaking device is also connected with a sulfuric acid solution storage tank, a discharge port at the lower part of the secondary cyanogen breaking device is connected with a feed port of the stirring reaction device, and a discharge port is arranged at the lower part of the stirring reaction device; the other side feed inlet at the upper part of the stirring reaction device is connected with a cement storage tank.
Description
Technical Field
The utility model relates to a useless processing technology field of danger, concretely relates to handle preprocessing device who contains cyanide waste residue.
Background
Cyanide is widely applied to many chemical industries in China, can be used for manufacturing pigments (iron blue), printing and dyeing oxidation auxiliaries, paint and ink and red blood salt, and has very wide application in the fields of dye coatings, electroplating, explosives, chemical reagents, medicines, metallurgy, salt, synthetic resin and the like. With the rapid development of the industry in China, a large amount of cyanide-containing waste generated in the production process cannot be effectively treated, and the threat to the surrounding ecological environment and the health of people is increased. Cyanide belongs to a highly toxic substance, most of cyanide is a highly toxic substance, and very small amount of cyanide can cause poisoning and death of people, animals, plants and aquatic organisms in a short time. After the cyano group enters the human body, hydrogen cyanide is generated, and the hydrogen cyanide can cause symptoms of headache, body discomfort, palpitation and the like of the human body in a very short time and even cause death.
At present, the research on cyanides in wastewater is more at home and abroad, the research on cyanides in solid waste is less, and related literature data on cyanide-containing waste residues is also less, and in recent years, people continuously seek safer and more economical processes and devices for treating cyanide-containing waste residues so as to reduce or eliminate the harm of cyanides to the environment. Therefore, new treatment solutions are needed to solve the treatment problems of such production waste residues.
Disclosure of Invention
The utility model provides a deal with preprocessing device who contains cyanide waste residue to the problem of mentioning in the background art, the utility model discloses the device solves this kind of processing difficult problem that contains cyanide waste residue.
In order to solve the above problems, the utility model adopts the following technical scheme: a pretreatment device for treating cyanide-containing waste residues comprises a primary cyanide breaking device, a secondary cyanide breaking device and a stirring reaction device which are sequentially arranged, wherein a waste gas treatment device is arranged above the primary cyanide breaking device, the secondary cyanide breaking device and the stirring reaction device; the upper part of the first-stage cyanogen breaking device is connected with a sodium hydroxide solution storage tank and a sodium hypochlorite solution storage tank, and the upper part of the first-stage cyanogen breaking device is also connected with a cyanide-containing waste residue storage tank; a discharge port at the lower part of the first-stage cyanogen breaking device is connected with a feed port at the upper part of the second-stage cyanogen breaking device; the upper part of the secondary cyanogen breaking device is connected with a sodium hypochlorite solution storage tank, the upper part of the secondary cyanogen breaking device is also connected with a sulfuric acid solution storage tank, a discharge port at the lower part of the secondary cyanogen breaking device is connected with a feed port of the stirring reaction device, and a discharge port is arranged at the lower part of the stirring reaction device; the other side feed inlet at the upper part of the stirring reaction device is connected with a cement storage tank.
Furthermore, the waste gas treatment device comprises a sodium hypochlorite solution absorber, a sodium hydroxide solution absorber, an activated carbon absorber and an induced draft fan which are sequentially arranged.
Furthermore, the upper part of the stirring reaction device is a cavity opening, a dust hood is arranged right above the cavity opening, the dust hood is connected with a bag-type dust remover through an exhaust pipeline, and an exhaust channel of the bag-type dust remover is connected with a waste gas treatment device.
And furthermore, a first slurry pump is arranged between the cyanide-containing waste residue storage tank and a feed inlet at the upper part of the first-stage cyanogen breaking device.
And a second slurry pump is arranged between a discharge hole at the lower part of the first-stage cyanogen breaking device and a feed inlet of the second-stage cyanogen breaking device.
And a third slurry pump is arranged between the second slurry outlet and the feed inlet of the stirring reaction device.
And furthermore, a pump is arranged between the feed inlet on the other side and the cement storage tank.
Further preferably, the stirring driving structure of the stirring reaction device is located at the lower part of the stirring reaction chamber, and a stirring shaft is arranged above the stirring driving structure.
The utility model has the advantages that: through the utility model discloses the device effective treatment contains cyanide waste residue, carries out the broken cyanogen of two-stage through control reaction system pH, and further solidification stabilization handles again, makes to contain the purpose that cyanide waste residue finally reaches innoxious processing.
Drawings
The present invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is a structural diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
Referring to the attached drawings, the pretreatment device for treating cyanide-containing waste residues comprises a primary cyanide breaking device 1, a secondary cyanide breaking device 2 and a stirring reaction device 3 which are sequentially arranged, wherein a waste gas treatment device 4 is arranged above the primary cyanide breaking device 1, the secondary cyanide breaking device 2 and the stirring reaction device 3; the upper part of the first-stage cyanogen breaking device 1 is connected with a sodium hydroxide solution storage tank 1a and a sodium hypochlorite solution storage tank 1b, and the upper part of the first-stage cyanogen breaking device 1 is also connected with a cyanide-containing waste residue storage tank 1c; a discharge port at the lower part of the first-stage cyanogen breaking device 1 is connected with a feed port at the upper part of the second-stage cyanogen breaking device 2; sodium hypochlorite solution storage tank 1b is connected on the upper portion of second grade cyanogen breaker 2, and sulphuric acid solution storage tank 2a is still connected on the upper portion of second grade cyanogen breaker 2, and stirring reaction device 3's feed inlet is connected to the discharge gate of second grade cyanogen breaker 2 lower part, and stirring reaction device 3 lower part sets up discharge opening 3a.
After the material is discharged from the discharge opening 3a of the stirring reaction device 3, the material enters the curing bin 5 for curing and then is safely buried.
Further, the other side feed port 3e of the upper part of the agitation reaction apparatus 3 is connected to a cement storage tank 6 through a pump 6 a.
Further, the sodium hypochlorite solution storage tanks 1b on the upper parts of the first-stage cyanogen breaking device 1 and the second-stage cyanogen breaking device 2 are the same storage tank. Referring to the attached drawing, namely sodium hypochlorite solution inlets of a primary cyanogen breaking device 1 and a secondary cyanogen breaking device 2 are connected with the same sodium hypochlorite solution storage tank 1b;
through the utility model discloses the device effective treatment contains the cyanide waste residue, carries out the broken cyanogen of two-stage through control reaction system pH, and further solidification stabilization handles again, makes contain the purpose that the cyanide waste residue finally reaches innoxious processing.
Further, the waste gas treatment device 4 comprises a sodium hypochlorite solution absorber 4a, a sodium hydroxide solution absorber 4b, an activated carbon absorber 4c and an induced draft fan 4d which are sequentially arranged.
Further, the upper part of the stirring reaction device 3 is a cavity opening, a dust collection cover 3b is arranged right above the cavity opening, the dust collection cover 3b is connected with a bag-type dust collector 3c through an exhaust pipeline, and an exhaust passage of the bag-type dust collector 3c is connected with an exhaust gas treatment device 4.
Namely, the dust collecting cover 3b is connected with the waste gas treatment device 4 after collecting the waste gas of the stirring reaction device 3 and filtering the waste gas by the bag-type dust collector 3 c.
Furthermore, a first slurry pump 1d is arranged between the cyanide-containing waste residue storage tank 1c and a waste residue inlet of the first-stage cyanogen breaking device 1 (namely, a feed inlet at the upper part of the first-stage cyanogen breaking device 1).
Furthermore, a second slurry pump 2b is arranged between the first slurry outlet 1e (namely a discharge port at the lower part of the first-stage cyanogen breaking device 1) and the feed port of the second-stage cyanogen breaking device 2.
Further, a third slurry pump 2d is arranged between the second slurry outlet 2c and the feed inlet of the stirring reaction device.
Furthermore, the stirring driving structure of the stirring reaction device 3 is located at the lower part of the stirring reaction chamber, and a stirring shaft is arranged above the stirring driving structure. Still further preferably, the driving motor 3d of the stirring driving structure is provided with a speed reducer and a frequency converter, and different rotating speeds of stirring paddles on the stirring shaft can be adjusted.
Further preferably, a hydraulic pump is provided at the discharge port 3a of the lower part of the stirring reaction device 3, so that automatic discharge can be realized.
Through the utility model discloses all kinds of cyanide waste residues that contain can be effectively handled to the device, including HW07 class (the cyanide waste is contained in the thermal treatment), HW11 class (contain cyanogen distillation residue), HW17 class (the surface treatment contains the cyanogen waste), HW33 class (inorganic cyanide waste), HW48 class (the cyanide waste that non-ferrous metal smelting produced) etc. in the "national hazardous waste record". The purpose of harmlessly treating cyanide-containing waste residues is finally achieved by adjusting the pH of a reaction system, adding a quantitative sodium hypochlorite solution to break cyanogen in stages, oxidizing the cyanides in the waste residues into nontoxic nitrogen and carbon dioxide, adding cement to further cure and stabilize the treatment and finally adding the cement.
The pretreatment process for treating cyanide-containing waste residues based on the device comprises the following steps:
1) Preparing a medicament: preparing corresponding sodium hydroxide solution (10%), sodium hypochlorite solution (13%, industrial grade) and sulfuric acid solution (10%) in advance according to index contents such as cyanide and heavy metal in cyanide-containing waste residues to be treated, preparing 10% sodium hydroxide solution in an alkali absorption device (namely a sodium hydroxide solution absorber 4 b) in the waste gas treatment device 4, and preparing 6% sodium hypochlorite solution in a sodium hypochlorite solution absorption device (namely a sodium hypochlorite solution absorber 4 a);
2) First-order cyanogen breaking reaction: pumping cyanide-containing waste residues into a first-stage cyanogen breaking device 1, adding a sodium hydroxide solution through a sodium hydroxide solution inlet groove 1a to adjust the pH value of a system to 10.0-11.0, uniformly stirring, adding a sodium hypochlorite solution through a sodium hypochlorite solution inlet groove 1b, and stirring for reaction, wherein the mechanism of the first-stage cyanogen breaking reaction is as follows:
CN — +ClO — →CNO — +Cl — (pH＝10.0-11.0)
3) And (3) secondary cyanogen breaking reaction: pumping the slurry after the first-stage cyanogen breaking reaction into a second-stage cyanogen breaking device 2, adding a sulfuric acid solution through a sulfuric acid solution inlet groove 2a to adjust the pH value of the system to 8.0-8.5, uniformly stirring, adding a certain amount of sodium hypochlorite solution through a sodium hypochlorite solution inlet groove 1b, and stirring for reaction, wherein the second-stage cyanogen breaking reaction mechanism is as follows:
2CNO — +3ClO — +H 2 O→2CO 2 ↑+N 2 ↑+2OH — +3Cl — (pH＝8.0-8.5)
4) Curing and stabilizing reaction: pumping the slag slurry after the secondary cyanogen breaking reaction into a stirring reaction device 3, pumping cement into a cement storage tank 6, simultaneously starting the stirring reaction device 3, adjusting the stirring speed, and carrying out a curing stabilization reaction;
M + +OH - → M. OH ↓ (M represents heavy metal)
3CaO·SiO 2 +H 2 O→CaO·SiO 2 ·H 2 O (gel) + Ca (OH) 2
5) Dust and waste gas treatment: dust (cement ash and the like) and gas escaping from the stirring reaction device 3 are collected by a dust collection cover 3b and then enter a bag-type dust collector 3c, the waste gas after dust collection and the waste gas discharged from the upper parts of the primary cyanogen breaking device 1 and the secondary cyanogen breaking device 2 sequentially pass through a sodium hypochlorite solution absorber 4a, a sodium hydroxide solution absorber 4b and an active carbon absorber 4c, and the waste gas is discharged after being treated;
6) Safe landfill: and (4) sampling and detecting the stabilized product after maintenance, and safely burying the stabilized product after the test indexes meet the landfill control standard.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A pretreatment device for disposing cyanide-containing waste residues is characterized in that: the device comprises a primary cyanogen breaking device (1), a secondary cyanogen breaking device (2) and a stirring reaction device (3) which are sequentially arranged, wherein a waste gas treatment device (4) is arranged above the primary cyanogen breaking device (1), the secondary cyanogen breaking device (2) and the stirring reaction device (3); the upper part of the first-stage cyanogen breaking device (1) is connected with a sodium hydroxide solution storage tank (1 a) and a sodium hypochlorite solution storage tank (1 b), and the upper part of the first-stage cyanogen breaking device (1) is also connected with a cyanide-containing waste residue storage tank (1 c); a discharge port at the lower part of the first-stage cyanogen breaking device (1) is connected with a feed port at the upper part of the second-stage cyanogen breaking device (2); the upper part of the secondary cyanogen breaking device (2) is connected with a sodium hypochlorite solution storage tank (1 b), the upper part of the secondary cyanogen breaking device (2) is also connected with a sulfuric acid solution storage tank (2 a), a discharge hole at the lower part of the secondary cyanogen breaking device (2) is connected with a feed inlet of the stirring reaction device (3), and a discharge hole (3 a) is formed at the lower part of the stirring reaction device (3); the other side feed inlet (3 e) at the upper part of the stirring reaction device (3) is connected with a cement storage tank (6).
2. The pretreatment device for disposing cyanide-containing waste residue according to claim 1, wherein: the waste gas treatment device (4) comprises a sodium hypochlorite solution absorber (4 a), a sodium hydroxide solution absorber (4 b), an activated carbon absorber (4 c) and an induced draft fan (4 d) which are sequentially arranged.
3. The pretreatment device for disposal of cyanide-containing waste residue according to claim 1 or 2, wherein: the upper part of the stirring reaction device (3) is a cavity opening, a dust collection cover (3 b) is arranged right above the cavity opening, the dust collection cover (3 b) is connected with a bag-type dust collector (3 c) through an exhaust pipeline, and an exhaust passage of the bag-type dust collector (3 c) is connected with an exhaust gas treatment device (4).
4. The pretreatment device for disposing cyanide-containing waste residue according to claim 3, wherein: and a first slurry pump (1 d) is arranged between the cyanide-containing waste residue storage tank (1 c) and a feed inlet at the upper part of the first-stage cyanogen breaking device (1).
5. The pretreatment device for disposing cyanide-containing waste residue according to claim 3, wherein: a second slurry pump (2 b) is arranged between the discharge hole at the lower part of the first-stage cyanogen breaking device (1) and the feed hole of the second-stage cyanogen breaking device (2).
6. The pretreatment device for disposing cyanide-containing waste residue according to claim 3, wherein: a third slurry pump (2 d) is arranged between the second slurry outlet (2 c) and the feed inlet of the stirring reaction device.
7. The pretreatment device for disposing cyanide-containing waste residue according to claim 3, wherein: a pump (6 a) is arranged between the feed inlet (3 e) at the other side and the cement storage tank (6).
8. The pretreatment device for disposing cyanide-containing waste residue according to claim 3, wherein: and a stirring driving structure of the stirring reaction device (3) is positioned at the lower part of the stirring reaction cavity, and a stirring shaft is arranged above the stirring driving structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220607715.3U CN217593692U (en) | 2022-03-18 | 2022-03-18 | Pretreatment device for treating cyanide-containing waste residues |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220607715.3U CN217593692U (en) | 2022-03-18 | 2022-03-18 | Pretreatment device for treating cyanide-containing waste residues |
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Address after: 230000 Wushan Town, Changfeng County, Hefei City, Anhui Province Patentee after: Anhui Haoyue Environmental Technology Co.,Ltd. Address before: 230000 Wushan Town, Changfeng County, Hefei City, Anhui Province Patentee before: ANHUI HAO YUE ENVIRONMENTAL TECHNOLOGY Co.,Ltd. |