CN219409484U - Chromium-containing wastewater sludge recycling equipment - Google Patents
Chromium-containing wastewater sludge recycling equipment Download PDFInfo
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- CN219409484U CN219409484U CN202320173674.6U CN202320173674U CN219409484U CN 219409484 U CN219409484 U CN 219409484U CN 202320173674 U CN202320173674 U CN 202320173674U CN 219409484 U CN219409484 U CN 219409484U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The utility model discloses chromium-containing wastewater sludge recycling equipment which comprises a chromium-containing wastewater storage tank, a first pH adjusting tank, a reduction reaction tank, a second pH adjusting tank, a impurity removal reaction tank, a coagulation tank, a flocculation tank and a sedimentation tank which are sequentially connected, wherein a discharge pipe and a sludge discharge pipe are arranged on the sedimentation tank, the sludge discharge pipe is connected with the sludge tank, the sludge tank is communicated with a sludge pressing machine through a conveying pump, and the sludge pressing machine is provided with a clear water flushing assembly, a liquid outlet and a sludge collecting port. According to the utility model, the impurity removal reaction is carried out before the coagulation reaction through the impurity removal reaction tank, common sodium sulfide, calcium chloride and other medicaments are added, and the environmental protection indexes of products are guaranteed to be met through removing lead, mercury, cadmium, fluorine and other pollutants in the wastewater.
Description
Technical Field
The utility model belongs to the technical field of wastewater treatment equipment, and particularly relates to chromium-containing wastewater and sludge recycling equipment.
Background
The chromium-containing wastewater mainly originates from industries such as chemical industry, electroplating, leather, metallurgy, pigment and the like, wherein the chromium-containing wastewater mainly takes hexavalent chromium as a main component. Hexavalent chromium is a strong oxidant with strong toxicity, has great harm to the environment and organisms, and is a recognized carcinogen and strictly-used high-pollution heavy metal. At present, the treatment method of the wastewater containing chromium in China generally reduces hexavalent chromium into trivalent chromium, and then adopts alkali to precipitate the trivalent chromium to be used as hazardous waste landfill treatment. Although hexavalent chromium can be completely removed by this method, a large amount of chromium hydroxide sludge is produced, which is industrially difficult to use and must be landfilled as a hazardous waste. However, this treatment method of changing the precious chemical raw material into useless and harmful hazardous waste is quite unreasonable.
Disclosure of Invention
The utility model mainly aims to provide chromium-containing wastewater sludge recycling equipment, a purifying reaction tank is added, the environment-friendly problem that iron-chromium sludge is taken as a product is effectively solved, a clear water flushing component is added on a mud pressing machine, clear water high-pressure sodium washing is carried out on the iron-chromium sludge subjected to filter pressing, the content of sodium is reduced, and the iron-chromium sludge raw material can be ensured to be a raw material for producing ceramic pigment.
According to a first aspect of the utility model, there is provided a chromium-containing wastewater and sludge recycling device, which is characterized by comprising a chromium-containing wastewater storage tank, a first pH adjusting tank, a reduction reaction tank, a second pH adjusting tank, a impurity removal reaction tank, a coagulation tank, a flocculation tank and a sedimentation tank which are sequentially connected, wherein a discharge pipe and a sludge discharge pipe are arranged on the sedimentation tank, the sludge discharge pipe is connected with a sludge tank, the sludge tank is communicated with a sludge pressing machine through a conveying pump, and the sludge pressing machine is provided with a clear water flushing assembly, a liquid outlet and a sludge collecting port.
In a particular embodiment of the utility model, the drain communicates with the water inlet of the fresh water washing assembly.
In a specific embodiment of the utility model, a first medicine feeder and a second medicine feeder are arranged beside the impurity removal reaction tank, and Na is stored in the first medicine feeder 2 S, caCl is stored in the second medicine feeder 2 。
In a specific embodiment of the utility model, a third doser is arranged beside the coagulation tank, and ferrous sulfate is stored in the third doser.
In a specific embodiment of the utility model, the sludge discharge pipe conveys the sludge in the sedimentation tank to the sludge tank through a screw conveyor.
One of the above technical solutions of the present utility model has at least one of the following advantages or beneficial effects: according to the utility model, the impurity removal reaction tank and the mud pressing machine with the clear water flushing component are arranged, the impurity removal reaction is carried out before the coagulation reaction through the impurity removal reaction tank, common sodium sulfide, calcium chloride and other medicaments are added, and the environmental protection indexes of products are guaranteed to be met through removing lead, mercury, cadmium, fluorine and other pollutants in waste water 2 、Fe 2 O 3 、TiO 2 、Al 2 O 3 The waste is converted into ceramic pigment through mixing and calcining, so that the recycling of the waste is realized, and the problem of chromium-containing sludge disposal is solved.
Drawings
The utility model is further described below with reference to the drawings and examples;
FIG. 1 is a schematic block diagram of one embodiment of the present utility model.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may explicitly or implicitly include one or more features.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the term "connected" should be construed broadly, and for example, it may be a fixed connection or an active connection, or it may be a detachable connection or a non-detachable connection, or it may be an integral connection; may be mechanically connected, may be electrically connected, or may be in communication with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements, indirect communication or interaction relationship between the two elements.
The following disclosure provides many different embodiments, or examples, for implementing different aspects of the utility model.
Referring to fig. 1, a chromium-containing wastewater sludge recycling apparatus is characterized by comprising a chromium-containing wastewater storage tank 10, a first pH adjusting tank 11, a reduction reaction tank 12, a second pH adjusting tank 13, a impurity removal reaction tank 14, a coagulation tank 15, a flocculation tank 16 and a sedimentation tank 17 which are sequentially connected, wherein a discharge pipe 171 and a sludge discharge pipe 172 are arranged on the sedimentation tank 17, the sludge discharge pipe 172 is connected with a sludge tank 18, the sludge tank 18 is communicated with a sludge press 20 through a conveying pump 19, and the sludge press 20 is provided with a clean water flushing assembly 201, a liquid outlet 203 and a sludge collection port 202. Preferably, the sludge discharge pipe 172 conveys the sludge in the sedimentation tank 17 to the sludge tank 18 by means of a screw conveyor.
Specifically, the chromium-containing wastewater in the chromium-containing wastewater storage tank 10 flows into the first pH adjusting tank 11, liquid alkali is added into the first pH adjusting tank 11 to adjust the pH, the solution is introduced into the reduction reaction tank 12 to react with sodium metabisulfite in the reduction reaction tank 12, the reacted product is introduced into the second pH adjusting tank 13, the liquid alkali is added into the second pH adjusting tank 13 to carry out second pH adjustment, the product with the pH value adjusted is sent into the impurity removal reaction tank 14 to carry out impurity removal, the impurity removal is carried out, the product is then subjected to flocculation in the coagulation tank 15 and the flocculation tank 16 and then enters the sedimentation tank 17, the flocculation tank 16 adopts the common Polyacrylamide (PAM) to carry out flocculation, the liquid in the sedimentation tank 17 is discharged through the discharge pipe 171, the liquid reaches the discharge standard, the sludge in the sedimentation tank 17 is sent into the sludge discharge pipe 172 to be stored in the sludge tank 18, the conveying pump 19 pumps the sludge in the sludge tank 18 to the sludge press 20, the iron-chromium sludge which is carried out is washed by the clear water washing component 201 to carry out, the clear water high-pressure sodium washing is adopted to improve the chromium content and the content ratio of the iron-chromium sludge, the sodium content is reduced, the clear water is ensuredThe quality requirement of the iron-chromium sludge raw material is met, so that the iron-chromium sludge raw material after filter pressing is added with SiO with proper proportion in the subsequent production process 2 、Fe 2 O 3 、TiO 2 、Al 2 O 3 The waste is converted into ceramic pigment through mixing and calcining, so that the recycling of the waste is realized, and the problem of chromium-containing sludge disposal is solved.
In one embodiment of the present utility model, the liquid outlet 203 is communicated with the water inlet end of the clean water flushing assembly 201, and the filtrate in the mud pressing machine 20 can flow back to the clean water flushing assembly 201, so as to realize the recycling of the water.
In one embodiment of the present utility model, a first chemical adder 141 and a second chemical adder 142 are disposed beside the impurity removal reaction tank 14, and Na is stored in the first chemical adder 141 2 S, caCl is stored in the second doser 142 2 . The reagent such as sodium sulfide and calcium chloride is conveniently added into the impurity removal reaction tank 14, and the environmental protection indexes of the product are ensured to be met by removing the pollutants such as lead, mercury, cadmium, fluorine and the like in the wastewater.
In one embodiment of the present utility model, a third chemical feeder 151 is disposed beside the coagulation tank 15, and ferrous sulfate is stored in the third chemical feeder 151, and the ferrous sulfate is used as a coagulant instead of PAC, which is more favorable for forming the raw material of the iron-chromium sludge.
The utility model is provided with a impurity removal reaction tank 14 and a mud pressing machine 20 with a clear water flushing assembly 201, the impurity removal reaction is carried out before the coagulation reaction by the impurity removal reaction tank 14, common sodium sulfide, calcium chloride and other medicaments are added, and the environmental protection indexes of products are guaranteed to be met by removing lead, mercury, cadmium, fluorine and other pollutants in waste water, in the mud pressing machine 20, the clear water flushing assembly 201 is used for carrying out filter pressing on the iron-chromium sludge, clear water is adopted for washing sodium at high pressure, so as to improve the chromium and iron content ratio of the iron-chromium sludge, reduce the sodium content and ensure to meet the quality requirements of the iron-chromium sludge raw materials, so that the iron-chromium sludge raw materials after filter pressing are added with SiO in a proper proportion in the subsequent production process 2 、Fe 2 O 3 、TiO 2 、Al 2 O 3 Is converted into ceramic pigment through mixing and calcining, realizes the recycling of waste, and solves the problems ofChromium-containing sludge disposal problems. The equipment in the utility model is easy to operate and stable in operation.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. The chromium-containing wastewater sludge recycling equipment is characterized by comprising a chromium-containing wastewater storage tank, a first pH adjusting tank, a reduction reaction tank, a second pH adjusting tank, an impurity removal reaction tank, a coagulation tank, a flocculation tank and a sedimentation tank which are sequentially connected, wherein a discharge pipe and a sludge discharge pipe are arranged on the sedimentation tank, the sludge discharge pipe is connected with a sludge tank, the sludge tank is communicated with a sludge pressing machine through a conveying pump, and the sludge pressing machine is provided with a clear water flushing assembly, a liquid outlet and a sludge collecting port.
2. The chromium-containing wastewater sludge recycling apparatus according to claim 1, wherein the liquid discharge port is communicated with a water inlet end of the clean water flushing assembly.
3. The chromium-containing wastewater sludge recycling apparatus according to claim 1, wherein a first chemical feeder and a second chemical feeder are arranged beside the impurity removal reaction tank, and Na is stored in the first chemical feeder 2 S, caCl is stored in the second medicine feeder 2 。
4. The chromium-containing wastewater sludge recycling apparatus according to claim 1, wherein a third doser is arranged beside the coagulation tank, and ferrous sulfate is stored in the third doser.
5. The chromium-containing wastewater sludge recycling apparatus according to claim 1, wherein the sludge discharge pipe conveys sludge in the sedimentation tank to the sludge tank through a screw conveyor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320173674.6U CN219409484U (en) | 2023-01-18 | 2023-01-18 | Chromium-containing wastewater sludge recycling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320173674.6U CN219409484U (en) | 2023-01-18 | 2023-01-18 | Chromium-containing wastewater sludge recycling equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219409484U true CN219409484U (en) | 2023-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320173674.6U Active CN219409484U (en) | 2023-01-18 | 2023-01-18 | Chromium-containing wastewater sludge recycling equipment |
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| CN (1) | CN219409484U (en) |
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2023
- 2023-01-18 CN CN202320173674.6U patent/CN219409484U/en active Active
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