CN212076660U - System for handle desulfurization waste water suspended solid - Google Patents
System for handle desulfurization waste water suspended solid Download PDFInfo
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- CN212076660U CN212076660U CN202020313418.9U CN202020313418U CN212076660U CN 212076660 U CN212076660 U CN 212076660U CN 202020313418 U CN202020313418 U CN 202020313418U CN 212076660 U CN212076660 U CN 212076660U
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Abstract
The utility model relates to a sewage treatment technical field especially relates to a system for handle desulfurization waste water suspended solid. The system comprises: an acidification device, a flocculation device and a precipitation device. The acidification device comprises an acidification pool, a medicament storage device and a medicament delivery device; the medicament storage device is communicated with the acidification tank through a medicament feeding device, and the medicament feeding device is provided with a flow control device; the flocculation device comprises a flocculation tank and a medicine feeding device communicated with the flocculation tank; the sedimentation device comprises a sedimentation tank and a heavy metal detector, and the heavy metal detector is arranged on the inner side tank wall of the sedimentation tank; the acidification tank, the flocculation tank and the sedimentation tank are communicated in sequence. Utilize the system provided by the utility model, not only can effectively get rid of the suspended solid in the desulfurization waste water, can prevent in the desulfurization waste water moreover that heavy metal ion from taking place to subside, when solving present processing desulfurization waste water suspended solid, heavy metal ion can subside in a large number in the desulfurization waste water, forms the problem of heavy metal mud.
Description
Technical Field
The utility model relates to a sewage treatment technical field especially relates to a system for handle desulfurization waste water suspended solid.
Background
The desulfurization waste water is mainly the discharge water of an absorption tower in the wet desulfurization (limestone/gypsum method) process of boiler flue gas. The desulfurization wastewater has the following main characteristics:
firstly, the components are more, and the water quality changes greatly. The content of sodium ions, calcium ions, sulfate ions and heavy metal ions in the desulfurization wastewater is more, and the water quality of the desulfurization wastewater can be obviously changed along with the continuous operation of various devices of a power plant. In addition, calcium sulfate is basically in a saturated state, and once the temperature is increased, the desulfurization wastewater is easy to scale, so that the service life of equipment is seriously influenced. Secondly, the salt content of the desulfurization waste water is too high. The production practice of coal-fired power plants shows that the desulfurization waste water contains a large amount of salt. The larger the electric power quantity of the coal-fired power plant is, the higher the salt content of the desulfurization wastewater is. Thirdly, the corrosiveness is stronger. The desulfurization wastewater has complex components, contains more acidic substances, has strong corrosivity, and can cause serious corrosion to mechanical equipment, pipelines and the like in the power generation process. Fourthly, the content of suspended matters in the desulfurization wastewater is relatively large. The main components of the suspension are gypsum particles, and then fly ash from flue gas, calcium carbonate and calcium sulfite added in the desulfurization process, and the like.
At present, the coal-fired power plant commonly utilizes the mode of adding alkali liquor to remove suspended matters in the desulfurization wastewater. Although the mode can remove suspended matters to a certain extent, heavy metals in the desulfurization wastewater are also deposited in a large amount under an alkaline environment. The sludge containing a large amount of heavy metals formed by flocculation sedimentation belongs to dangerous solid waste, and the cost and the difficulty for treating the sludge containing a large amount of heavy metals are high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a system for handle desulfurization waste water suspended solid is provided, when solving present processing desulfurization waste water suspended solid, heavy metal ion can subside in a large number in the desulfurization waste water, forms heavy metal sludge's problem.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
a desulfurization waste water suspended matter treatment system comprising: an acidification device, a flocculation device and a precipitation device;
the acidification device comprises an acidification pool, a medicament storage device and a medicament delivery device; the medicament storage device is communicated with the acidification pool through the medicament feeding device, and the medicament feeding device is provided with a flow control device; a pH meter and an ion detector are arranged on the inner side wall of the acidification tank, and a first stirrer is also arranged in the acidification tank;
the flocculation device comprises a flocculation tank and a medicine feeding device communicated with the flocculation tank; a metering pump is arranged on a connecting pipe of the medicine feeding device and the flocculation tank; a second stirrer is arranged in the flocculation tank;
the sedimentation device comprises a sedimentation tank and a heavy metal detector, and the heavy metal detector is arranged on the inner side tank wall of the sedimentation tank;
the acidification tank, the flocculation tank and the sedimentation tank are communicated in sequence.
The sulfuric acid solution or the hydrochloric acid solution stored in the agent storage device is added into the acidification tank through the agent adding device under the regulation and control action of the flow control device, so that the desulfurization wastewater is regulated to be acidic, and the sedimentation of heavy metal ions in the desulfurization wastewater is inhibited. The agent feeding device is provided with the flow control device, so that the addition amount of the sulfuric acid solution or the hydrochloric acid solution can be controlled, and the pH value of the desulfurization wastewater reaches a fixed value. The pH meter can detect the acidity value of the desulfurization wastewater, and the flow control device controls the addition amount of the sulfuric acid solution or the hydrochloric acid solution according to the display value of the pH meter. The ion detector arranged in the acidification tank can detect the initial value of heavy metal ions in the desulfurization wastewater. The stirrer in the acidification tank can fully mix the acid solution with the desulfurization wastewater.
The medicine feeding device communicated with the flocculation tank can feed a flocculating agent (such as mixed curing solution of sodium silicate and polyaluminium chloride) and a coagulant aid (such as alum or polyacrylamide) into the flocculation tank. And (3) adding a flocculating agent and a coagulant aid to flocculate and precipitate suspended matters such as gypsum particles, fly ash, calcium carbonate, calcium sulfite and the like in the desulfurization wastewater. The metering pump can control the amount of the flocculating agent and the coagulant aid added into the flocculation tank by the medicine feeding device. The stirrer in the flocculation tank can fully mix the flocculating agent and the coagulant aid in the desulfurization wastewater.
The heavy metal detector is arranged on the inner side wall of the sedimentation tank, so that the content of heavy metal ions in the desulfurization wastewater after flocculation treatment can be determined.
By utilizing the system, not only the suspended matters in the desulfurization wastewater are removed, but also the sedimentation of heavy metal ions is effectively inhibited. Finally, sludge formed by flocculation precipitation and desulfurization wastewater are respectively discharged. Because the discharged sludge basically does not contain heavy metal ions, the difficulty and the cost of the subsequent treatment of the sludge are reduced.
Further, the medicine feeding device comprises a flocculant storage box, a coagulant aid storage box, a first medicine feeding pipe and a second medicine feeding pipe;
the first medicine inlet pipe is respectively communicated with the flocculant storage tank and the flocculation tank, and the second medicine inlet pipe is respectively communicated with the coagulant aid storage tank and the flocculation tank; and the first medicine inlet pipe and the second medicine inlet pipe are both provided with metering pumps.
The flocculating agent that the flocculating agent storage box was loaded is passed through first medicine feed pipe, is added to the flocculation basin in, and the addition amount of flocculating agent can be controlled to first measuring pump. The coagulant aid contained in the coagulant aid storage tank is added into the flocculation tank through a second medicine inlet pipe, and the second metering pump can control the addition amount of the flocculant.
Further, the sedimentation device also comprises a drain pipe, and the drain pipe is communicated with a drain outlet of the sedimentation tank.
In the sedimentation tank, the sludge formed by the flocculated suspended matters can be settled, and finally, the sludge is discharged through a discharge pipe.
Further, a suspended matter detector is further arranged on the inner wall of the sedimentation tank and used for measuring the content of suspended matters in the treated desulfurization wastewater.
And a suspended matter detector is arranged in the sedimentation tank, so that the content of suspended matters in the treated desulfurization wastewater can be detected. So that the suspended matter content of the discharged desulfurization waste water reaches the specified standard.
Furthermore, the acidification tank and the flocculation tank are cuboid, and the bottom of the sedimentation tank is conical.
The acidification tank and the flocculation tank are rectangular, so that the construction is convenient, and the device is suitable for most construction environments. The bottom of the sedimentation tank is in a cone shape, which is beneficial to realizing the solid-liquid separation of the desulfurization wastewater.
Compared with the prior art, the utility model provides a system for handle desulfurization waste water suspended solid, include: an acidification device, a flocculation device and a precipitation device. In the acidification device, the desulfurization waste water is adjusted to be acidic. The desulfurization wastewater is subjected to flocculation and precipitation in the flocculation device, and heavy metal ions in the desulfurization wastewater are not precipitated. Finally, after the desulfurization wastewater is subjected to precipitation by the precipitation device, solid-liquid separation is realized. Utilize the system provided by the utility model, heavy metal ion takes place to subside in not only can preventing desulfurization waste water, can effectively get rid of the suspended solid in the desulfurization waste water moreover and reduce the degree of difficulty and the cost of subsequent processing mud.
Drawings
FIG. 1 is a schematic view of the whole system for treating suspended substances in desulfurization waste water according to the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1. acidizing pond, 2, flocculation basin, 3, sedimentation tank, 4, medicament storage device, 5, first agitator, 6, pH meter, 7, ion detector, 8, medicament are put in the device, 9, flow control device, 10, flocculating agent bin, 11, first medicine pipe of advancing, 12, the measuring pump, 13, the second agitator, 14, the suspended solid detector, 15, the second medicine pipe of advancing, 16, the coagulant aid bin, 17, the heavy metal detector, 18, the drain, 19, the blow off pipe.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "center", "inner", "outer", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being 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 invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A method for treating a desulfurization wastewater suspension comprises the following steps: adding a hydrochloric acid solution with the mass concentration of 1% into the desulfurization wastewater, and adjusting the pH value to 4 (if the initial pH value of the desulfurization wastewater is less than 7, the pH value can not be adjusted according to the water quality); taking 0.25mol/L sodium silicate solution, adding hydrochloric acid solution with the concentration of 0.25mol/L into the sodium silicate solution, and uniformly stirring to obtain polymerized sodium silicate solution; wherein the volume ratio of the sodium silicate solution to the hydrochloric acid solution is 4: 1; adding polyaluminium chloride according to the mass ratio of 1:1 of sodium silicate to polyaluminium chloride to obtain a mixed curing solution of sodium silicate and polyaluminium chloride; adding 10mg of mixed curing solution of sodium silicate and polyaluminium chloride and 3mg of polyacrylamide into each liter of acidic desulfurization wastewater, and stirring for flocculation; and discharging sludge in the flocculated desulfurization wastewater.
A desulfurization waste water suspended matter treatment system comprising: an acidification device, a flocculation device and a precipitation device;
the acidification device comprises an acidification tank 1, a medicament storage device and a medicament feeding device 8; the medicament storage device is communicated with the acidification tank 1 through a medicament feeding device 8, and a flow control device 9 is arranged on the medicament feeding device 8; in order to control the pH value of the desulfurization wastewater, detect the initial value of heavy metal ions and realize the full mixing of the hydrochloric acid solution and the desulfurization wastewater, a pH meter 6 and an ion detector 7 are arranged on the inner side wall of the acidification tank 1, and a first stirrer 5 is also arranged in the acidification tank 1;
the flocculation device comprises a flocculation tank 2 and a medicine feeding device communicated with the flocculation tank 2; a metering pump 12 is arranged on a connecting pipe of the medicine feeding device and the flocculation tank 2; a second stirrer 13 is arranged in the flocculation tank 2;
the sedimentation device comprises a sedimentation tank 3 and a heavy metal detector 17, wherein the heavy metal detector 17 is arranged on the inner side tank wall of the sedimentation tank 3;
the acidification tank 1, the flocculation tank 2 and the sedimentation tank 3 are communicated in sequence.
Hydrochloric acid solution stored in the agent storage device 4 is added into the acidification pool 1 through the agent adding device 8 under the regulation and control action of the flow control device 9, so that the desulfurization wastewater is adjusted to be acidic, and the sedimentation of heavy metal ions in the desulfurization wastewater is inhibited. The agent feeding device 8 is provided with a flow control device 9 which can control the addition amount of the sulfuric acid solution or the hydrochloric acid solution so that the pH value of the desulfurization wastewater reaches a fixed value. The pH meter 6 can detect the acidity value of the desulfurization waste water, and when the displayed value of the pH meter 6 is 4, the flow control device 9 prevents the hydrochloric acid solution from being added further. And recording the initial value of the heavy metal ions in the desulfurization wastewater according to the detection result of the ion detector 7 arranged in the acidification tank 1. The hydrochloric acid solution and the desulfurization waste water are fully mixed by a stirrer in the acidification tank 1 at the rotating speed of 120 r/min.
The medicine feeding device communicated with the flocculation tank 2 can add a flocculating agent (mixed curing solution of sodium silicate and polyaluminium chloride) and a coagulant aid (polyacrylamide) into the flocculation tank 2. And (3) adding a flocculating agent and a coagulant aid to flocculate and precipitate suspended matters such as gypsum particles, fly ash, calcium carbonate, calcium sulfite and the like in the desulfurization wastewater. The metering pump 12 can control the amount of the flocculating agent and the coagulant aid added into the flocculation tank 2 by the medicine feeding device. The stirrer in the flocculation tank 2 can fully and uniformly mix the flocculating agent and the coagulant aid added into the desulfurization wastewater.
The heavy metal detector 17 in the sedimentation tank 3 can detect the content of heavy metal ions in the desulfurization wastewater after flocculation treatment.
This system can avoid heavy metal ion's sediment when handling desulfurization waste water suspended solid, prevents the production of heavy metal mud.
In order to realize the respective addition of the flocculating agent and the coagulant aid, the medicine inlet device comprises a flocculating agent storage tank 10, a coagulant aid storage tank 16, a first medicine inlet pipe 11 and a second medicine inlet pipe 15;
the first medicine inlet pipe 11 is respectively communicated with the flocculant storage tank 10 and the flocculation tank 2, and the second medicine inlet pipe 15 is respectively communicated with the coagulant aid storage tank 16 and the flocculation tank 2; the first medicine inlet pipe 11 and the second medicine inlet pipe 15 are both provided with a metering pump 12.
The mixed curing solution of sodium silicate and polyaluminium chloride contained in the flocculant storage tank 10 is added into the flocculation tank 2 through the first chemical inlet pipe 11, and the first metering pump 12 controls the addition amount of the mixed curing solution of sodium silicate and polyaluminium chloride to be 10 mg. The polyacrylamide contained in the coagulant aid storage tank 16 is added into the flocculation tank 2 through the second chemical inlet pipe 15, and the second metering pump 12 controls the addition amount of the polyacrylamide to be 3 mg. After the two medicaments are added, the second stirrer 13 is started, and the two medicaments are stirred for 1 minute at the rotating speed of 260r/min and then for 15 minutes at the rotating speed of 40 r/min.
In order to realize solid-liquid separation, the sedimentation device also comprises a sewage discharge pipe 19, and the sewage discharge pipe 19 is communicated with a sewage discharge outlet 18 of the sedimentation tank 3. In the sedimentation tank 3, sludge formed by the flocculated suspension can be settled by standing, and finally, the sludge is discharged through a discharge pipe 19.
In order to determine the content of suspended matters in the treated desulfurization wastewater, a suspended matter detector 14 is further arranged on the inner wall of the sedimentation tank 3 and is used for determining the content of suspended matters in the treated desulfurization wastewater. A suspended matter detector 14 is arranged in the sedimentation tank 3, and can detect the content of suspended matters in the treated desulfurization wastewater. So that the suspended matter content of the discharged desulfurization waste water reaches the specified standard.
Preferably, the acidification tank 1 and the flocculation tank 2 are cuboid, and the bottom of the sedimentation tank 3 is cone-shaped. The rectangular acidification tank 1 and the flocculation tank 2 are convenient to build; the sedimentation tank 3 with the conical bottom is beneficial to discharging sludge in the desulfurization wastewater. And the desulfurization wastewater after flocculation precipitation enters a sedimentation tank 3, and the detection value of a heavy metal detector 17 is recorded. And after the desulfurization wastewater is kept stand in the sedimentation tank 3 for 0.5 hour, the sludge sedimentation and the desulfurization wastewater are respectively discharged.
By utilizing the system provided by the invention, the heavy metal ions in the desulfurization wastewater can be prevented from settling, and suspended matters in the desulfurization wastewater can be effectively removed. The problem of when handling desulfurization waste water suspended solid at present, heavy metal ion can subside in a large number in the desulfurization waste water, forms heavy metal mud is solved.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. A system for treating a desulfurized wastewater suspension comprising: an acidification device, a flocculation device and a precipitation device;
the acidification device comprises an acidification tank (1), a medicament storage device (4) and a medicament feeding device (8); the medicament storage device (4) is communicated with the acidification pool (1) through the medicament feeding device (8), and the medicament feeding device (8) is provided with a flow control device (9); a pH meter (6) and an ion detector (7) are arranged on the inner side wall of the acidification tank (1), and a first stirrer (5) is also arranged in the acidification tank (1);
the flocculation device comprises a flocculation tank (2) and a medicine feeding device communicated with the flocculation tank (2); a metering pump (12) is arranged on a connecting pipe of the medicine feeding device and the flocculation tank (2); a second stirrer (13) is arranged in the flocculation tank (2);
the sedimentation device comprises a sedimentation tank (3) and a heavy metal detector (17), wherein the heavy metal detector (17) is arranged on the inner side tank wall of the sedimentation tank (3);
the acidification tank (1), the flocculation tank (2) and the sedimentation tank (3) are communicated in sequence.
2. The system for treating a suspension of desulfurized wastewater according to claim 1,
the medicine feeding device comprises a flocculant storage box (10), a coagulant aid storage box (16), a first medicine feeding pipe (11) and a second medicine feeding pipe (15);
the first medicine inlet pipe (11) is respectively communicated with the flocculant storage tank (10) and the flocculation tank (2), and the second medicine inlet pipe (15) is respectively communicated with the coagulant aid storage tank (16) and the flocculation tank (2); and the first medicine inlet pipe (11) and the second medicine inlet pipe (15) are respectively provided with a metering pump (12).
3. The system for treating a suspension of desulfurized wastewater according to claim 1,
the sedimentation device also comprises a sewage discharge pipe (19), and the sewage discharge pipe (19) is communicated with a sewage discharge port (18) of the sedimentation tank (3).
4. A system for treating a suspension of desulphurized waste water according to claim 1, wherein a suspension detector (14) is also provided on the inner wall of the sedimentation tank (3).
5. The system for treating a suspension of desulfurized wastewater according to claim 1, wherein said acidification tank (1) and said flocculation tank (2) are rectangular and the bottom of said sedimentation tank (3) is conical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020313418.9U CN212076660U (en) | 2020-03-13 | 2020-03-13 | System for handle desulfurization waste water suspended solid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020313418.9U CN212076660U (en) | 2020-03-13 | 2020-03-13 | System for handle desulfurization waste water suspended solid |
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| CN212076660U true CN212076660U (en) | 2020-12-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113149273A (en) * | 2021-04-13 | 2021-07-23 | 杭州力环科技有限公司 | Take sewage treatment structure's sewage detector |
| CN113200622A (en) * | 2020-03-13 | 2021-08-03 | 大唐环境产业集团股份有限公司 | Method and system for treating desulfurization wastewater suspended matters |
-
2020
- 2020-03-13 CN CN202020313418.9U patent/CN212076660U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113200622A (en) * | 2020-03-13 | 2021-08-03 | 大唐环境产业集团股份有限公司 | Method and system for treating desulfurization wastewater suspended matters |
| CN113149273A (en) * | 2021-04-13 | 2021-07-23 | 杭州力环科技有限公司 | Take sewage treatment structure's sewage detector |
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