CN114873791A - Reclaimed water reuse treatment system - Google Patents
Reclaimed water reuse treatment system Download PDFInfo
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- CN114873791A CN114873791A CN202210591873.9A CN202210591873A CN114873791A CN 114873791 A CN114873791 A CN 114873791A CN 202210591873 A CN202210591873 A CN 202210591873A CN 114873791 A CN114873791 A CN 114873791A
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- sedimentation tank
- neutralization
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- B01D21/02—Settling tanks with single outlets for the separated liquid
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
Abstract
The invention discloses a reclaimed water recycling treatment system, which comprises a dehydration separation system and an acid-base neutralization device, wherein the dehydration separation system is used for carrying out solid-liquid separation on sewage flowing through the dehydration separation system, the acid-base neutralization device is used for carrying out acid-base neutralization on the sewage from the dehydration separation system, the dehydration separation system is provided with a water inlet and a water outlet, the acid-base neutralization device comprises a carbon dioxide neutralization device, the carbon dioxide neutralization device comprises a neutralization tank and an injection device, and the injection device is used for injecting carbon dioxide into a water body of the neutralization tank; the water outlet of the dehydration separation system is connected with the water inlet of the neutralization tank through a first pipeline; and the water outlet of the neutralization pond is connected with the water inlet of the dehydration separation system through a second pipeline. By adopting the technical scheme provided by the scheme, the reclaimed water can be obtained and reused in the concrete mixing station, and meanwhile, a calcium carbonate byproduct can be obtained.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a reclaimed water recycling treatment system.
Background
In the prior art, concrete generally adopts cement as a cementing material, sand and stone as aggregates, and water (which may contain an additive and an admixture) are mixed according to a certain proportion and stirred to form a mixture. The concrete needs a large amount of water in the production process, the water used by the concrete mixing station is usually from underground water resources or industrial water, and the production water cost is high.
Concrete production mixing station on-site mixing building host cleaning, site washing, environmental and workshop dust fall, cement tank car cleaning and the like require a large amount of water and produce a large amount of sewage. The sewage contains cement paste, aggregate and impurities and mixtures carried by the aggregate, solid contents in the sewage can be separated by sand-stone separation equipment, but the separated sewage is strong alkaline, has a high pH value which can reach more than 13, can pollute the environment when being directly discharged, and cannot be directly used for concrete production.
As mentioned above, a large amount of water is needed for production of the concrete mixing station, and a large amount of sewage generated by the concrete mixing station cannot be directly discharged outside, so that the reasonable recycling of the sewage of the concrete mixing station is very necessary for reducing the production water cost and protecting the environment.
The current concrete production enterprise mainly adopts the following modes for treating the sewage of the concrete mixing station: 1. the sewage after precipitation or filter pressing is mixed with a certain proportion of fresh water for production, but the method can only be used for producing low-grade common concrete (the grade of the concrete is lower than C40); 2. the sewage is internally recycled after being subjected to filter pressing, the mode can only be reused for tank car cleaning, site washing and mixing building main machine cleaning, and when the internally recycled sewage cannot be completely utilized, the sewage can overflow; 3. and reclaimed water is recycled after PH value regulation and oxidation treatment. At present, the pH value of sewage of a mixing station is adjusted by neutralizing the mixed sewage with organic acid, then oxidizing the mixed sewage with a strong oxidant (such as hydrogen peroxide), and finally, performing shallow precipitation treatment and reusing the treated sewage for production. Although the mode can achieve the recycling of the reclaimed water, the cost is higher, and the strong oxidant has strong corrosivity, thereby belonging to the controlled transportation products.
In summary, the concrete mixing station has strong requirements for a mixing sewage regeneration and recycling system with low cost and high operation efficiency, and particularly for places with water resource shortage and strict environmental protection requirements, it is necessary for the concrete mixing sewage to be regenerated to obtain reclaimed water (also called recycled water) and recycled.
Disclosure of Invention
The invention provides a reclaimed water recycling treatment system, which aims at solving the technical problems that the concrete mixing station has strong requirements on a mixing sewage recycling system with low cost and high operation efficiency, and particularly has a very necessary technical problem for recycling reclaimed water (also called reclaimed water) obtained by regenerating concrete mixing sewage in places with water resource shortage and strict environmental protection requirements. By adopting the technical scheme provided by the scheme, the reclaimed water can be obtained and reused in the concrete mixing station, and meanwhile, a calcium carbonate byproduct can be obtained.
Aiming at the problems, the reclaimed water recycling treatment system provided by the invention solves the problems through the following technical key points: the reclaimed water recycling treatment system comprises a dehydration separation system and an acid-base neutralization device, wherein the dehydration separation system is used for carrying out solid-liquid separation on sewage flowing through the dehydration separation system, the acid-base neutralization device is used for carrying out acid-base neutralization on the sewage from the dehydration separation system, the dehydration separation system is provided with a water inlet and a water outlet, the acid-base neutralization device comprises a carbon dioxide neutralization device, the carbon dioxide neutralization device comprises a neutralization tank and an injection device, and the injection device is used for injecting carbon dioxide into a water body of the neutralization tank;
the neutralization tank is provided with a water inlet and a water outlet,
the water outlet of the dehydration separation system is connected with the water inlet of the neutralization pond through a first pipeline;
and the water outlet of the neutralization pond is connected with the water inlet of the dehydration separation system through a second pipeline.
In the application process of the existing concrete mixing station, sewage generated by cleaning a concrete transport vehicle, a stirring main machine and a production site is a main sewage source of the mixing station, wherein in the generated sewage, the components needing attention comprise calcium ions, hydroxide ions, sodium ions, potassium ions, sulfate ions, sand particles, additives, inorganic salts, cement, an antifreezing agent, sulfate, an expanding agent, fly ash and the like. Through grit material washing and screening unit, can be relatively easy get retrieve the grit material that the particle size is greater than 0.0075mm in the sewage, to carrying out the remaining sewage after the grit washs, the reuse of reclaimed water processing system that this scheme of can adopting provided carries out sewage regeneration, realizes the reuse of reclaimed water or discharge to reach standard.
In the scheme, the dehydration separation system is used for solid-liquid separation and can be arranged into a sand and stone material cleaning and screening unit which is provided by the scheme but not limited to the scheme; since the sand and stone material cleaning and screening unit is generally understood to realize sand and stone recovery, and as for sewage, the sand and stone material cleaning and screening unit is used for removing sand and stone in water and classifying and collecting sand and stone according to particle size, the dehydration separation system can also be arranged to be different from the sand and stone material cleaning and screening unit, and the dehydration separation system is arranged at the rear stage of the sand and stone material cleaning and screening unit so as to further remove particulate matters and suspended matters in sewage. The acid-base neutralization device is used for coping with the characteristic that the general PH value of sewage is higher, and the sewage is neutralized to adjust the PH value of the sewage, and finally the reclaimed water is obtained to realize reclaimed water reuse or standard discharge. Since the dehydration separation system and the acid-base neutralization device are common devices in the field of water treatment, the dehydration separation system and the acid-base neutralization device are not introduced in more detail in the scheme.
Different from the prior art, firstly, the acid-base neutralization device is arranged to comprise a carbon dioxide neutralization device, and the carbon dioxide neutralization device comprises a neutralization tank and an injection device, so that after sewage enters the neutralization tank, carbon dioxide is injected into the water body of the neutralization tank through the injection device, and the pH value of the sewage is adjusted by adopting the carbon dioxide, and the method has the following characteristics: the construction cost of the acid-base neutralization device is lower; the carbon dioxide can not neutralize the alkaline sewage excessively, and an accurate control system for neutralizing the alkaline sewage is not needed; the carbon dioxide neutralizer is adopted to neutralize the alkaline sewage neutralizer, so that the cost is low, and the carbon dioxide gas is stored safely and conveniently; when the sewage of the concrete mixing station is treated by carbon dioxide, calcium carbonate byproducts can be generated.
Aiming at the characteristics of generating calcium carbonate byproducts, the scheme is further provided with the following steps: the neutralization tank is provided with a water inlet and a water outlet; the water outlet of the dehydration separation system is connected with the water inlet of the neutralization tank through a first pipeline; the water outlet of the neutralization tank is connected with the water inlet of the dehydration separation system through a second pipeline, so that when the scheme is in specific application, before sewage enters the neutralization tank, as the sewage source of the neutralization tank can come from the water outlet of the dehydration separation system, impurities such as gravel, suspended matters and the like in the sewage can be separated under the solid-liquid separation effect of the dehydration separation system (first solid-liquid separation), and the contents of the gravel and the suspended matters in the sewage entering the neutralization tank are less; after the sewage from the dehydration separation system enters the neutralization tank, the pH value is adjusted by adopting an injection device, calcium carbonate byproducts with fine particle sizes are generated in the process, at the moment, the water body containing the calcium carbonate particles is led into the dehydration separation system through the second pipeline, at the moment, the dehydration separation system can further purify the water body through the solid-liquid separation effect (the second solid-liquid separation), when realizing that the water discharges up to standard or the normal water is collected, owing to taken place solid-liquid separation effect for the first time in the dehydration piece-rate system, the calcium carbonate granule purity that precipitates in neutralization pond, dehydration piece-rate system in this in-process is higher, and the calcium carbonate accessory substance that this stage obtained satisfies the quality demand of selling the crude product as trades such as building materials, papermaking, rubber, promotes the economic nature of this system operation and the economic nature of concrete mixing station whole operation.
As a further technical scheme of the reclaimed water reuse treatment system:
as a person skilled in the art, the above dehydration separation system may be configured to have only one, and in order to obtain calcium carbonate with higher purity, it is necessary to remove the separated solid-phase substance after the first solid-liquid separation is completed, so that the content of calcium carbonate in the solid-phase substance obtained after the second solid-liquid separation is higher. But this scheme is when specifically using, because the sewage source is various: can come from the washing of stirring host computer building, the washing of place ground, inside or the outside washing of haulage vehicle etc, and the content of each composition is indeterminable in the gained sewage, like this, specific volume sewage is at first solid-liquid separation, the solid-liquid separation quantity of the solid phase material of being isolated is not definite for the second time in-process, for avoid carrying out loaded down with trivial details solid phase material clearance operation to the dehydration separation system, make first solid-liquid separation and second solid-liquid separation accomplish in the dehydration separation system of difference, set up to: the dehydration separation system comprises at least two dehydration separation tanks, and each dehydration separation tank is used for carrying out solid-liquid separation on sewage flowing through the dehydration separation tank;
in the dehydration separation tank, the water outlets of part of the dehydration separation tank are connected with the water inlet of the neutralization tank through a first pipeline, and the water inlets of the other dehydration separation tank are connected with the water outlet of the neutralization tank through a second pipeline. In the scheme, the characteristic that components needing to be removed in the concrete mixing station are easy to separate through precipitation is considered, and on the basis of simple equipment, no need of further adding flocculate and low setting and running cost, the dehydration separation tank is adopted to complete corresponding solid-liquid separation. Set up to including two at least dehydration separation ponds, the delivery port of partial dehydration separation pond and the water inlet in neutralization pond pass through first pipe connection, the water inlet of all the other dehydration separation ponds passes through the second pipe connection with the delivery port in neutralization pond, like this, the dehydration separation pond that is in first pipeline entrance point is used for accomplishing first solid-liquid separation, the dehydration separation pond that is in second pipeline delivery port is used for accomplishing second solid-liquid separation, when carrying out the clearance of dehydration separation pond solid phase material, to the frequency of washing or the number of times in dehydration separation pond according to the in-service use condition accomplish can: the method is not limited to how many times of water injection in the neutralization tank is completed or how many times of solid-liquid separation of water in the neutralization tank is completed, and when the dehydration separation tank reaches the maximum bearing capacity of solid-phase substances or the dehydration separation tank loses the optimal separation effect, the corresponding dehydration separation tank is cleaned of the solid-phase substances.
Different from the technical scheme that the pH value of sewage is regulated by mineral acid (hydrochloric acid, sulfuric acid and the like), the treatment efficiency of carbon dioxide is low, and the treatment method is used as a technical scheme that the sewage in a neutralization pond can be injected and carbon dioxide can be distributed or mixed in the sewage relatively uniformly under the action of only one water inlet pump, and is characterized in that: the first pipeline is also connected with a water inlet pump in series, and the water inlet pump provides power for fluid to flow into the neutralization tank from the dehydration separation system through the first pipeline;
the injection system comprises a mixing tank, the mixing tank is connected in series on a first pipeline, and the mixing tank is positioned at the outlet end of the water inlet pump;
the injection system also includes a carbon dioxide gas source connected to the interior space of the mixing tank via a gas inlet line. When the sewage treatment device is specifically used, sewage generated by the dehydration and separation system through first solid-liquid separation is injected into the neutralization tank through the first pipeline, the mixing tank and the water inlet pump by the water inlet pump, and when the sewage flows through the mixing tank, the sewage is mixed with carbon dioxide gas injected into the mixing tank by the injection system, so that the purpose of adjusting the PH value of the sewage by utilizing the carbon dioxide is achieved.
Further, this scheme is through setting up the blending tank sets up the blending tank at the exit end of intake pump simultaneously, and like this, the usable power that comes from the intake pump play water makes sewage can take place to mix in the blending tank, and above mix can make carbon dioxide can be more even and abundant with sewage effect in order to realize the PH value regulation purpose, if for evenly gas distribution in neutralization pond and stir neutralization pond normal water with a large tracts of land, set up and use cost is lower and system's equipment is simple.
In specific implementation, in order to improve the utilization rate of carbon dioxide, the mixing tank is a closed tank body. Furthermore, as one of the main points of the scheme is to increase the content of calcium carbonate in the calcium carbonate byproduct, the sewage is preferably subjected to relatively strict filtration or precipitation through first solid-liquid separation before entering the water inlet pump, so that a filler is preferably arranged in the mixing tank, the filler can be a stainless steel filler block, and the sewage inlet water from the water inlet pump and the carbon dioxide inlet air from the injection system are arranged on the same position on the mixing tank, so that the uniformity of the distribution of the carbon dioxide in the sewage is improved under the condition that the abrasion speed of the filler is acceptable. If a large amount of gravel impurities are contained in the sewage after the first solid-liquid separation is finished, the mixing tank is preferably set to be an empty tank, and meanwhile, the sewage inlet position from the water inlet pump and the carbon dioxide inlet position from the injection system are arranged in a right-facing mode.
As a more specific system layout mode, the following settings are set: the first conduit has a plurality of outlets in the neutralization tank distributed at different locations in the neutralization tank. This scheme is long and should set up to the excessive characteristics of carbon dioxide to adopting carbon dioxide to realize that alkaline sewage pH value adjusts and has relative time, provides one kind through arranging a plurality of exports in the neutralization pond for carbon dioxide along with sewage gets into the neutralization pond can be by the technical scheme of more high-efficient utilization: can be further applied to water bodies at different positions of the neutralization pond.
For further improving the uniformity that carbon dioxide distributes in neutralization pond sewage after getting into the neutralization pond, simultaneously as a simple structure's realization scheme, set up to: the first pipeline is connected with a plurality of releasers, each releaser comprises a branch pipe communicated with the first pipeline, a plurality of communicating holes communicated with the inner side and the outer side of each branch pipe are formed in each branch pipe, and each communicating hole serves as the outlet. In this scheme, adopt the branch pipe is as the supporting body of export, simple structure not only, preparation convenience obtain the export of a greater quantity simultaneously easily. The branch pipes are preferably arranged as blind pipes, the communication holes are distributed on the side wall and the closed end of the blind pipe, and the open end of the blind pipe is connected with the first pipeline.
Furthermore, for increasing the opportunity and time of carbon dioxide and sewage contact to improve carbon dioxide's utilization ratio, accelerate quality of water neutralization rate, as a simple structure's realization, set up as: the releaser also comprises a pipe joint and an axial flow pump;
any one of the releasers is: the branch pipe is partially embedded into the pipe joint, the communication holes are located on the inner side of the pipe joint, the axial flow pump is installed in the pipe joint and used for driving fluid to flow from one end of the pipe joint to the other end of the pipe joint. When the scheme is applied, sewage flows along the pipe joints by the action of the axial flow pump on the sewage, so that carbon dioxide discharged through the communicating holes can further flow along with water in the pipe joints, and the contact opportunity and action time are increased by mixing and following.
As one kind through axial-flow pump and tube coupling, can make the water in the neutralization pond have the motion form of horizontal direction and vertical motion form to reach the better stirring mesh of effect, set up to: the pipe sections are obliquely arranged in the neutralization tank.
As a more detailed scheme of the dehydration separation system, the method comprises the following steps: the dehydration separation system comprises a sedimentation tank, the sedimentation tank comprises a first sedimentation tank and a second sedimentation tank, and the first sedimentation tank and the second sedimentation tank are vertical sedimentation tanks;
the fluid communicating pipe is used for injecting the effluent of the first sedimentation tank into the second sedimentation tank;
the water inlet and the water outlet on the dehydration separation system are respectively as follows: the water inlet is arranged on the first sedimentation tank, and the water outlet is arranged on the second sedimentation tank;
and a filler component is also arranged in the second sedimentation tank. The scheme aims at the characteristics that the separation of solid phase substances in the mixing station sewage generally has relatively high density, a flocculating agent is not needed, and the purpose of precipitation can be achieved by utilizing a physical structure, and provides a technical scheme which is small in occupied area, suitable for the design of mixing station sites and equipment arrangement and not easy to cause filler collapse.
Specifically, this sedimentation tank structure is when using, and sewage is accomplished the initial gross separation by the water inlet of first sedimentation tank in being introduced first sedimentation tank, and after the initial gross separation, sewage passes through fluid communicating pipe is introduced and is carried out further sedimentation separation in the second sedimentation tank. The vertical sedimentation tanks are arranged in the first sedimentation tank and the second sedimentation tank, so that a technical scheme that the occupied area is small, the application of a concrete mixing station is suitable, and the obtained sludge/mud cakes are easy to discharge is provided; the first sedimentation tank and the second sedimentation tank are used as sedimentation tanks of different stages in the sedimentation tank structure, thus, the first sedimentation tank can be regarded as a primary sedimentation tank in the whole sewage sedimentation treatment process, the second sedimentation tank can be regarded as a secondary sedimentation tank in the whole sewage sedimentation treatment process, meanwhile, the filler component is arranged in the secondary sedimentation tank and is opposite to the first sedimentation tank and the second sedimentation tank, sediment in the sewage is partially precipitated in the filler component and is precipitated in the first sedimentation tank and the second sedimentation tank, so that the filler component can accelerate the precipitation speed and the precipitation effect, meanwhile, the preceding stage is subjected to at least twice sedimentation, so that the blockage and even collapse of the packing component caused by excessive sediment formed on the packing component part can be effectively avoided, and therefore, in the specific implementation, specific application is considered, and no packing is required to be arranged in the first sedimentation tank; this scheme is different to concrete mix station sewage source, like the great characteristics of gravel particle size distribution scope in the sewage, adopt first sedimentation tank, second sedimentation tank and packing component obtain different precipitation points, thus, if the particle size is bigger, the bigger material of density (like the gravel) takes place the sediment more easily in first sedimentation tank, the concrete position of deposiing of the material that is difficult for precipitating (like the earth material of ground washing aquatic) more probably takes place in the packing component position, so adopt this scheme, can obtain the precipitate of different compositions in different positions, have the characteristics of carrying out categorised collection to the precipitate in order to make things convenient for follow-up utilization.
The scheme for refining the sedimentation tank is as follows: the first sedimentation tank is a closed container, a pressure relief opening is further formed in the top side of the first sedimentation tank, and a pressure relief device is connected to the pressure relief opening;
water distributors are arranged in the first sedimentation tank and the second sedimentation tank, and are of conical shell structures;
the water distributors are provided with a plurality of through holes, and the axes of the through holes are along the axis direction of the water distributors or along the wall thickness direction of the water distributors;
on the first sedimentation tank, the water distributor and the water inlet of the first sedimentation tank are coaxially arranged with the first sedimentation tank, the water distributor is positioned below the water inlet of the first sedimentation tank, and the tip end of the water distributor is upward;
on the second sedimentation tank, the water distributor and the water outlet of the fluid communicating pipe are coaxially arranged with the second sedimentation tank, the water distributor is positioned below the water outlet of the fluid communicating pipe, the tip end of the water distributor faces upwards, the packing component is positioned above the water outlet of the fluid communicating pipe, and the water outlet of the second sedimentation tank is positioned above the packing component. The first sedimentation tank is set to be a closed container, so that a water inlet power source (such as a pump body) of the first sedimentation tank can be used as a power source for injecting water from the first sedimentation tank to the second sedimentation tank, and the interior of the first sedimentation tank can be pressurized through the pump body, so that the fluid communication pipe can perform a communication function under the action of the pump body, and the process point setting number, the process point operation number and the process point maintenance number can be effectively reduced; considering the situation that solid-phase substances in the second sedimentation tank are accumulated to block a fluid communicating pipe and the like or cause the pressure in the first sedimentation tank to be greatly increased, the pressure relief device is arranged to comprise the pressure relief port and the pressure relief device, and the position of the pressure relief port is limited so that the pressure relief can be realized by exhausting the air at the top of the first sedimentation tank at the initial stage of pressure relief, thus the corrosion effect of sewage on the pressure relief device can be effectively reduced or the arrangement cost of the pressure relief device can be reduced; the water distributor is used for improving the sedimentation effect of the corresponding sedimentation tank, the shape, the position and the like of the water distributor are limited, so that the water distributor can not only uniformly distribute the flow velocity of fluid in the sedimentation tank, but also make part of the fluid pass through the water distributor through the through holes in the form of the through holes, and the better sedimentation effect is achieved by further reducing the flow velocity difference and improving the utilization rate of the inner space of the sedimentation tank.
To above-mentioned sedimentation tank structure that proposes, because solid-phase material is mainly calcium carbonate granule during solid-liquid separation for the second time, and the calcium carbonate particle diameter is less relatively, does benefit to calcium carbonate to deposit and concentrates the technical scheme who collects, can less fluid transport power demand, sets up to: the water outlet of the fluid communicating pipe is used as a part of the water inlet of the second sedimentation tank: the second sedimentation tank comprises a first water inlet and a second water inlet, the water outlet of the fluid communicating pipe is used as the first water inlet, and the water outlet of the neutralization tank is connected with the second water inlet. In the scheme, the second sedimentation tank is provided with the water inlet which is the water outlet of the fluid communicating pipe, so that sewage which comes from the neutralization tank and is subjected to acid-base neutralization through carbon dioxide can be directly injected into the second sedimentation tank, solid-liquid separation is rapidly and efficiently completed by using the filler in the second sedimentation tank, calcium carbonate obtained in the separation process only exists in the second sedimentation tank, and the purpose of reducing the fluid flow resistance is achieved by shortening the fluid flow path. In specific implementation, for the first solid-liquid separation, the sedimentation tank may include the first sedimentation tank and the second sedimentation tank as set forth above, and the first sedimentation tank and the second sedimentation tank jointly play a role in the first solid-liquid separation; aiming at the second solid-liquid separation, the sedimentation tank which plays a sedimentation role can be set to only comprise a second sedimentation tank, so that in the whole system, at least one first sedimentation tank and two second sedimentation tanks are arranged, wherein one second sedimentation tank and the first sedimentation tank are used for finishing the first solid-liquid separation, and the other second sedimentation tank is only used for finishing the second solid-liquid separation.
The invention has the following beneficial effects:
this scheme is different from prior art, at first, sets up acid-base neutralization apparatus in this scheme to including carbon dioxide neutralization apparatus, carbon dioxide neutralization apparatus includes neutralization pond and injection device, like this, enters into the neutralization pond after sewage, through injection device injects carbon dioxide into the water in neutralization pond, adopts carbon dioxide to realize sewage pH value and adjusts, has following characteristics: the construction cost of the acid-base neutralization device is lower; the carbon dioxide can not neutralize the alkaline sewage excessively, and an accurate control system for neutralizing the alkaline sewage is not needed; the carbon dioxide neutralizer is adopted to neutralize the alkaline sewage neutralizer, so that the cost is low, and the carbon dioxide gas is stored safely and conveniently; when the sewage of the concrete mixing station is treated by carbon dioxide, calcium carbonate byproducts can be generated.
Aiming at the characteristics of generating calcium carbonate byproducts, the scheme is further provided with the following steps: the neutralization tank is provided with a water inlet and a water outlet; the water outlet of the dehydration separation system is connected with the water inlet of the neutralization pond through a first pipeline; the water outlet of the neutralization tank is connected with the water inlet of the dehydration separation system through a second pipeline, so that when the scheme is in specific application, before sewage enters the neutralization tank, as the sewage source of the neutralization tank can come from the water outlet of the dehydration separation system, impurities such as gravel, suspended matters and the like in the sewage can be separated under the solid-liquid separation effect of the dehydration separation system (first solid-liquid separation), and the contents of the gravel and the suspended matters in the sewage entering the neutralization tank are less; after the sewage from the dehydration separation system enters the neutralization tank, the pH value is adjusted by adopting an injection device, calcium carbonate byproducts with fine particle sizes are generated in the process, at the moment, the water body containing the calcium carbonate particles is led into the dehydration separation system through the second pipeline, at the moment, the dehydration separation system can further purify the water body through the solid-liquid separation effect (the second solid-liquid separation), when realizing that the water discharges up to standard or the normal water is collected, owing to taken place solid-liquid separation effect for the first time in the dehydration piece-rate system, the calcium carbonate granule purity that precipitates in neutralization pond, dehydration piece-rate system in this in-process is higher, and the calcium carbonate accessory substance that this stage obtained satisfies the quality demand of selling the crude product as trades such as building materials, papermaking, rubber, promotes the economic nature of this system operation and the economic nature of concrete mixing station whole operation.
Drawings
FIG. 1 is a top view of an embodiment of the reclaimed water reuse treatment system according to the present disclosure;
FIG. 2 is a schematic perspective view of a part of a dehydration separation system in an embodiment of the reclaimed water recycling system according to the present embodiment;
FIG. 3 is a schematic perspective view of a carbon dioxide neutralization device in an embodiment of the reclaimed water recycling system according to the present disclosure;
FIG. 4 is a schematic view of a partial structure reflecting the connection relationship of a mixing tank, a water inlet pump and an air inlet pipe in an embodiment of the reclaimed water recycling treatment system according to the present disclosure;
FIG. 5 is a schematic view of a partial structure reflecting the position of the releaser in an embodiment of the reclaimed water reuse treatment system according to the present invention;
fig. 6 is a schematic view of a partial structure reflecting the structure of the sedimentation tank in an embodiment of the reclaimed water reuse treatment system according to the present disclosure.
The reference numbers in the drawings are respectively: 1. the sewage stirring tank, 2, a dehydration separation system, 2.1, a sewage filtrate outlet, 2.2, a neutralization water outlet, 3, a carbon dioxide neutralization device, 4, a clear water storage tank, 5, a multi-media filter, 6, a high-level tank, 7, a water quality detection chamber, 8, a sampling tank, 9, a mixing tank, 10, a water inlet pump, 11, an air inlet pipe, 12, a branch pipe, 13, a communication hole, 14, a pipe joint, 15, an axial flow pump, 16, a filler component, 17, a second sedimentation tank, 18, a fluid communication pipe, 19 and a first sedimentation tank.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples:
example 1:
as shown in fig. 1 to 6, the reclaimed water recycling treatment system comprises a dehydration separation system 2 and an acid-base neutralization device, wherein the dehydration separation system 2 is used for performing solid-liquid separation on sewage flowing through the dehydration separation system 2, the acid-base neutralization device is used for performing acid-base neutralization on the sewage from the dehydration separation system 2, a water inlet and a water outlet are formed in the dehydration separation system 2, the acid-base neutralization device comprises a carbon dioxide neutralization device 3, the carbon dioxide neutralization device 3 comprises a neutralization tank and an injection device, and the injection device is used for injecting carbon dioxide into a water body in the neutralization tank;
the neutralization tank is provided with a water inlet and a water outlet,
the water outlet of the dehydration separation system 2 is connected with the water inlet of the neutralization pond through a first pipeline;
and the water outlet of the neutralization pond is connected with the water inlet of the dehydration separation system 2 through a second pipeline.
In the application process of the existing concrete mixing station, sewage generated by cleaning a concrete transport vehicle, a stirring main machine and a production site is a main sewage source of the mixing station, wherein in the generated sewage, components needing attention comprise calcium ions, hydroxide ions, sodium ions, potassium ions, sulfate ions, sandstone particles, additives, inorganic salt, cement, an antifreezing agent, sulfate, an expanding agent, fly ash and the like. Through grit material washing and screening unit, can be relatively easy get retrieve the grit material that the particle size is greater than 0.0075mm in the sewage, to carrying out the remaining sewage after the grit washs, the reuse of reclaimed water processing system that this scheme of can adopting provided carries out sewage regeneration, realizes the reuse of reclaimed water or discharge to reach standard.
In the scheme, the dehydration separation system 2 is used for solid-liquid separation and can be arranged to comprise, but not limited to, the grit material cleaning and screening unit; since the sand and stone material cleaning and screening unit is generally understood to realize sand and stone recovery, and as for sewage, the sand and stone material cleaning and screening unit is used for removing sand and stone in water and classifying and collecting sand and stone according to particle size, the dehydration separation system 2 can also be arranged to be different from the sand and stone material cleaning and screening unit, and the dehydration separation system 2 is arranged at the rear stage of the sand and stone material cleaning and screening unit so as to further remove particulate matters and suspended matters in sewage. The acid-base neutralization device is used for coping with the characteristic that the general PH value of sewage is higher, and the sewage is neutralized to adjust the PH value of the sewage, and finally the reclaimed water is obtained to realize reclaimed water reuse or standard discharge. Since the dehydration separation system 2 and the acid-base neutralization device are common devices in the field of water treatment, the dehydration separation system 2 and the acid-base neutralization device are not described in more detail in the above scheme.
Different from the prior art, firstly, the acid-base neutralization device is arranged to comprise the carbon dioxide neutralization device 3, and the carbon dioxide neutralization device 3 comprises the neutralization tank and the injection device, so that after sewage enters the neutralization tank, carbon dioxide is injected into the water body of the neutralization tank through the injection device, and the pH value of the sewage is adjusted by adopting the carbon dioxide, and the method has the following characteristics: the construction cost of the acid-base neutralization device is lower; the carbon dioxide can not neutralize the alkaline sewage excessively, and an accurate control system for neutralizing the alkaline sewage is not needed; the carbon dioxide neutralizer is adopted to neutralize the alkaline sewage neutralizer, so that the cost is low, and the carbon dioxide gas is stored safely and conveniently; when the sewage of the concrete mixing station is treated by carbon dioxide, calcium carbonate byproducts can be generated.
Aiming at the characteristics of generating calcium carbonate byproducts, the scheme is further provided with the following steps: the neutralization tank is provided with a water inlet and a water outlet; the water outlet of the dehydration separation system 2 is connected with the water inlet of the neutralization pond through a first pipeline; the water outlet of the neutralization tank is connected with the water inlet of the dehydration separation system 2 through a second pipeline, so that in the specific application of the scheme, before sewage enters the neutralization tank, because the sewage source of the neutralization tank can come from the water outlet of the dehydration separation system 2, impurities such as gravel, suspended matters and the like in the sewage can be separated under the solid-liquid separation effect of the dehydration separation system 2 (first solid-liquid separation), and the contents of the gravel and the suspended matters in the sewage entering the neutralization tank are less; after the sewage from the dehydration separation system 2 enters the neutralization tank, because the PH value is adjusted by adopting the injection device, calcium carbonate byproducts with fine particle size can be generated in the process, at the moment, the water body containing calcium carbonate particles is led into the dehydration separation system 2 through the second pipeline, at this time, the dehydration separation system 2 can further purify the water body through the solid-liquid separation effect (the second solid-liquid separation), when realizing that the water discharges up to standard or the normal water is collected, owing to taken place first solid-liquid separation effect in dehydration piece-rate system 2, the calcium carbonate granule purity that precipitates in neutralization pond, dehydration piece-rate system 2 in this in-process is higher, and the calcium carbonate accessory substance that obtains at this stage satisfies the quality demand of selling the crude product as trades such as building materials, papermaking, rubber, promotes the economic nature of this system operation and the economic nature of concrete mixing station whole operation.
Example 2:
this example is further refined on the basis of example 1:
as a person skilled in the art, the above dehydration separation system 2 may be configured to have only one, and in order to obtain calcium carbonate with higher purity, it is necessary to remove the separated solid-phase substance after the first solid-liquid separation is completed, so that the content of calcium carbonate in the solid-phase substance obtained after the second solid-liquid separation is higher. But this scheme is when specifically using, because the sewage source is various: can come from the washing of stirring host computer building, the washing of place ground, inside or outside washing of haulage vehicle etc, and the content of each component is indeterminable in the obtained sewage, like this, specific volume sewage is not definite at first solid-liquid separation, the solid-phase material's that is separated out quantity in the second solid-liquid separation process, for avoiding carrying out loaded down with trivial details solid-phase material clearance operation to dehydration separation system 2, make first solid-liquid separation and second solid-liquid separation accomplish in dehydration separation system 2 of difference, set up to: the dehydration separation system 2 comprises at least two dehydration separation tanks, and each dehydration separation tank is used for carrying out solid-liquid separation on sewage flowing through the dehydration separation tank;
in the dehydration separation tank, the water outlets of part of the dehydration separation tank are connected with the water inlet of the neutralization tank through a first pipeline, and the water inlets of the other dehydration separation tank are connected with the water outlet of the neutralization tank through a second pipeline. In the scheme, the characteristic that components needing to be removed in the concrete mixing station are easy to separate through precipitation is considered, and on the basis of simple equipment, no need of further adding flocculate and low setting and running cost, the dehydration separation tank is adopted to complete corresponding solid-liquid separation. Set up to including two at least dehydration separation ponds, the delivery port of partial dehydration separation pond and the water inlet in neutralization pond pass through first pipe connection, the water inlet of all the other dehydration separation ponds passes through the second pipe connection with the delivery port in neutralization pond, like this, the dehydration separation pond that is in first pipeline entrance point is used for accomplishing first solid-liquid separation, the dehydration separation pond that is in second pipeline delivery port is used for accomplishing second solid-liquid separation, when carrying out the clearance of dehydration separation pond solid phase material, to the frequency of washing or the number of times in dehydration separation pond according to the in-service use condition accomplish can: the method is not limited to how many times of water injection in the neutralization tank or how many times of solid-liquid separation of water in the neutralization tank are completed, and when the maximum bearing capacity of the solid-phase substances is achieved in the dehydration separation tank or the optimal separation effect of the dehydration separation tank is lost, the corresponding dehydration separation tank is cleaned of the solid-phase substances.
Example 3:
this example is further refined on the basis of example 1:
different from the technical scheme that the PH value of sewage is regulated by mineral acid (hydrochloric acid, sulfuric acid and the like), the treatment efficiency of carbon dioxide is low, and the treatment method is used as a technical scheme that the sewage in a neutralization pond can be injected and carbon dioxide can be distributed or mixed in the sewage relatively uniformly under the action of only one water inlet pump 10, and is characterized in that: the first pipeline is also connected with a water inlet pump 10 in series, and the water inlet pump 10 provides power for fluid flowing from the dehydration separation system 2 to the neutralization pond through the first pipeline;
the injection system comprises a mixing tank 9, wherein the mixing tank 9 is connected in series on a first pipeline, and the mixing tank 9 is positioned at the outlet end of a water inlet pump 10;
the injection system further comprises a source of carbon dioxide gas connected to the inner space of the mixing tank 9 via a gas inlet pipe 11. When the scheme is specifically used, sewage generated by the dehydration and separation system 2 through first solid-liquid separation is injected into the neutralization pond through the first pipeline, the mixing tank 9 and the water inlet pump 10 by the water inlet pump 10, and when the sewage flows through the mixing tank 9, the sewage is mixed with carbon dioxide gas injected into the mixing tank 9 by the injection system, so that the purpose of adjusting the PH value of the sewage by utilizing the carbon dioxide is achieved.
Further, this scheme is through setting up blending tank 9 sets up blending tank 9 at the exit end of intake pump 10 simultaneously, and like this, the usable power that comes from intake pump 10 and goes out water makes sewage can take place to mix in blending tank 9, and above mix can make carbon dioxide can be more even and abundant with sewage effect in order to realize the PH value regulation purpose, if for evenly gas distribution in the neutralization pond and stir the neutralization pond normal water with a large tracts of land, set up with use cost lower and system's equipment is simple.
In specific implementation, in order to improve the utilization rate of carbon dioxide, the mixing tank 9 is a closed tank body. Further, since one of the main points of the present scheme is to increase the content of calcium carbonate in the calcium carbonate byproduct, the wastewater is preferably filtered or precipitated relatively strictly by the first solid-liquid separation before entering the water inlet pump 10, so that it is preferable to provide a filler in the mixing tank 9, the filler can be a stainless steel filler block, and the wastewater inlet water from the water inlet pump 10 and the carbon dioxide inlet air from the injection system are located at the same position on the mixing tank 9, so as to improve the uniformity of carbon dioxide distribution in the wastewater under the condition that the abrasion rate of the filler is acceptable. If a large amount of grit impurities are contained in the sewage after the first solid-liquid separation is completed, the mixing tank 9 is preferably set to be an empty tank, and meanwhile, the sewage inlet position from the water inlet pump 10 is opposite to the carbon dioxide inlet position from the injection system.
As a more specific system layout mode, the following settings are set: the first conduit has a plurality of outlets in the neutralization tank distributed at different locations in the neutralization tank. This scheme is long and should set up to the excessive characteristics of carbon dioxide to adopting carbon dioxide to realize that alkaline sewage pH value adjusts and has relative time, provides one kind through arranging a plurality of exports in the neutralization pond for carbon dioxide along with sewage gets into the neutralization pond can be by the technical scheme of more high-efficient utilization: can be further applied to water bodies at different positions of the neutralization pond.
For further improving the uniformity that carbon dioxide distributes in neutralization pond sewage after getting into the neutralization pond, simultaneously as a simple structure's realization scheme, set up to: the first pipeline is connected with a plurality of releasers, each releaser comprises a branch pipe 12 communicated with the first pipeline, a plurality of communication holes 13 communicated with the inner side and the outer side of the branch pipe 12 are formed in the branch pipe 12, and the communication holes 13 are used as the outlets. In this scheme, adopt branch pipe 12 is as the supporting body of export, not only simple structure, preparation convenience obtain the export of a large amount simultaneously easily. The branch pipe 12 is preferably a blind pipe, the communication holes 13 are distributed on the side wall and the closed end of the blind pipe, and the open end of the blind pipe is connected with the first pipeline.
Furthermore, for increasing the opportunity and time of carbon dioxide and sewage contact to improve carbon dioxide's utilization ratio, accelerate quality of water neutralization rate, as a simple structure's realization, set up as: the releaser also comprises a pipe joint 14 and an axial flow pump 15;
any one of the releasers is: the branch pipes 12 are partially embedded in the pipe joints 14, the communication holes 13 are located on the inner sides of the pipe joints 14, the axial flow pump 15 is installed in the pipe joints 14, and the axial flow pump 15 is used for driving fluid to flow from one end of the pipe joints 14 to the other end of the pipe joints 14. When the scheme is applied, sewage flows along the pipe joint 14 by the action of the axial flow pump 15 on the sewage, so that carbon dioxide discharged through the communication hole 13 can further flow along with the water body in the pipe joint 14, and the contact opportunity and action time are increased by mixing and following.
As one kind through axial-flow pump 15 and tube coupling 14, can make the water in the neutralization pond have the motion form of horizontal direction and vertical motion form to reach the stirring purpose of better effect, set up to: the pipe sections 14 are mounted in an inclined manner in the neutralization tank.
Example 4:
this example is further refined on the basis of example 1:
as a more detailed scheme of the dehydration separation system 2, the following arrangement is provided: the dehydration separation system 2 comprises a sedimentation tank, the sedimentation tank comprises a first sedimentation tank 19 and a second sedimentation tank 17, and the first sedimentation tank 19 and the second sedimentation tank 17 are both vertical flow sedimentation tanks;
the device also comprises a fluid communicating pipe used for injecting the effluent of the first sedimentation tank 19 into the second sedimentation tank 17;
the water inlet and the water outlet on the dehydration separation system 2 are respectively as follows: the water inlet is arranged on the first sedimentation tank 19, and the water outlet is arranged on the second sedimentation tank 17;
a packing assembly 16 is also arranged in the second sedimentation tank 17. The scheme aims at the characteristics that the separation of solid phase substances in the mixing station sewage generally has relatively high density, a flocculating agent is not needed, and the purpose of precipitation can be achieved by utilizing a physical structure, and provides a technical scheme which is small in occupied area, suitable for the design of mixing station sites and equipment arrangement and not easy to cause filler collapse.
Specifically, this sedimentation tank structure is when using, and sewage is accomplished the initial gross separation by the water inlet of first sedimentation tank 19 in being introduced first sedimentation tank 19, and after the initial gross separation, sewage passes through fluid communicating pipe is introduced and is carried out further sedimentation separation in the second sedimentation tank 17. The first sedimentation tank 19 and the second sedimentation tank 17 are both vertical sedimentation tanks, so that the technical scheme that the occupied area is small, the concrete mixing station is applicable, and the obtained sludge/mud cakes are easy to discharge is provided; the first sedimentation tank 19 and the second sedimentation tank 17 are arranged to be used as sedimentation tanks of different stages in the sedimentation tank structure, so that the first sedimentation tank 19 can be regarded as a primary sedimentation tank in the whole sewage sedimentation treatment process, the second sedimentation tank 17 can be regarded as a secondary sedimentation tank in the whole sewage sedimentation treatment process, meanwhile, by arranging the packing component 16 in the secondary sedimentation tank and relative to the first sedimentation tank 19 and the second sedimentation tank 17, the sediment in the sewage is precipitated in the packing component 16 part and is precipitated in the first sedimentation tank 19 and the second sedimentation tank 17, so that the packing component 16 can accelerate the sedimentation speed and the sedimentation effect, meanwhile, the preceding stage is subjected to sedimentation for at least two times, thereby effectively avoiding the blockage and even collapse of the packing component 16 caused by the excessive sediment formed in the packing component 16 part, and in particular implementation, considering the specific application, it is not necessary to provide a packing in the first settling tank 19; this scheme is different to concrete mix station sewage sources, like the great characteristics of grit particle size distribution scope in the sewage, adopt first sedimentation tank 19, second sedimentation tank 17 and filler component 16 obtain different precipitation points, thus, if the particle size is bigger, the bigger material of density (like the grit) takes place to deposit more easily in first sedimentation tank 19, the material that is difficult for the sediment (like the earth material of ground wash-water) concrete precipitation position more probably takes place in filler component 16 position, so this scheme of adoption, can obtain the precipitate of different components in different positions, have the characteristics of carrying out the classified collection to the precipitate in order to make things convenient for follow-up utilization.
The scheme for refining the sedimentation tank is as follows: the first sedimentation tank 19 is a closed container, a pressure relief opening is further formed in the top side of the first sedimentation tank 19, and a pressure relief device is connected to the pressure relief opening;
water distributors are arranged in the first sedimentation tank 19 and the second sedimentation tank 17, and are of conical shell structures;
the water distributors are provided with a plurality of through holes, and the axes of the through holes are along the axis direction of the water distributors or along the wall thickness direction of the water distributors;
on the first sedimentation tank 19, the water distributor and the water inlet of the first sedimentation tank 19 are coaxially arranged with the first sedimentation tank 19, the water distributor is positioned below the water inlet of the first sedimentation tank 19, and the tip end of the water distributor is upward;
on the second sedimentation tank 17, the water distributor and the water outlet of the fluid communicating pipe are coaxially arranged with the second sedimentation tank 17, the water distributor is positioned below the water outlet of the fluid communicating pipe, the tip end of the water distributor is upward, the packing component 16 is positioned above the water outlet of the fluid communicating pipe, and the water outlet of the second sedimentation tank 17 is positioned above the packing component 16. The first sedimentation tank 19 is set to be a closed container, so that a water inlet power source (such as a pump body) of the first sedimentation tank 19 can be used as a power source for injecting water from the first sedimentation tank 19 to the second sedimentation tank 17, and the interior of the first sedimentation tank 19 can be pressurized through the pump body, so that the fluid communicating pipes can perform communicating function under the action of the pump body, and thus, the process point setting number, the process point operation number and the process point maintenance number can be effectively reduced; considering the situation that solid-phase substances in the second sedimentation tank 17 are accumulated to block a fluid communicating pipe and the like or cause the large increase of the internal pressure of the first sedimentation tank 19, the pressure relief device comprises the pressure relief port and the pressure relief device, and the position of the pressure relief port is limited so that the pressure relief can be realized by exhausting the air at the top of the first sedimentation tank 19 at the initial stage of pressure relief, thus the corrosion effect of sewage on the pressure relief device can be effectively reduced or the setting cost of the pressure relief device can be reduced; the water distributor is used for improving the sedimentation effect of the corresponding sedimentation tank, the shape, the position and the like of the water distributor are limited, so that the water distributor can not only uniformly distribute the flow velocity of fluid in the sedimentation tank, but also make part of the fluid pass through the water distributor through the through holes in the form of the through holes, and the better sedimentation effect is achieved by further reducing the flow velocity difference and improving the utilization rate of the inner space of the sedimentation tank.
To above-mentioned sedimentation tank structure that proposes, because solid-phase material is mainly calcium carbonate granule during solid-liquid separation for the second time, and the calcium carbonate particle diameter is less relatively, does benefit to calcium carbonate to deposit and concentrates the technical scheme who collects, can less fluid transport power demand, sets up to: the water outlet of the fluid communicating pipe is used as a part of the water inlet of the second sedimentation tank 17: the second sedimentation tank 17 includes a first water inlet and a second water inlet, a water outlet of the fluid communicating pipe serves as the first water inlet, and a water outlet of the neutralization tank is connected with the second water inlet. In the scheme, the second sedimentation tank 17 is provided with more than only the water inlet which is the water outlet of the fluid communicating pipe, so that sewage which comes from the neutralization tank and is subjected to acid-base neutralization through carbon dioxide can be directly injected into the second sedimentation tank 17, solid-liquid separation is rapidly and efficiently completed by using the filler in the second sedimentation tank, calcium carbonate obtained in the separation process only exists in the second sedimentation tank 17, and the purpose of reducing the fluid flow resistance is achieved by shortening the fluid flow path. In specific implementation, for the first solid-liquid separation, the sedimentation tank may include the first sedimentation tank 19 and the second sedimentation tank 17 as set forth above, and the first sedimentation tank 19 and the second sedimentation tank 17 jointly play a role in the first solid-liquid separation; for the second solid-liquid separation, the sedimentation tank which plays a sedimentation role can be set to only comprise the second sedimentation tank 17, so that in the whole system, at least one first sedimentation tank 19 and two second sedimentation tanks 17 are arranged, wherein one second sedimentation tank 17 and the first sedimentation tank 19 are used for completing the first solid-liquid separation, and the other second sedimentation tank 17 is only used for completing the second solid-liquid separation.
The foregoing is a more detailed description of the present invention in connection with specific preferred embodiments thereof, and it is not intended that the specific embodiments of the present invention be limited to these descriptions. Other embodiments that can be derived by a person skilled in the art without departing from the scope of the present invention are also intended to be included within the scope of the present invention.
Claims (10)
1. The reclaimed water recycling treatment system comprises a dehydration separation system (2) and an acid-base neutralization device, wherein the dehydration separation system (2) is used for carrying out solid-liquid separation on sewage flowing through the dehydration separation system, the acid-base neutralization device is used for carrying out acid-base neutralization on the sewage from the dehydration separation system (2), and the dehydration separation system (2) is provided with a water inlet and a water outlet, and is characterized in that the acid-base neutralization device comprises a carbon dioxide neutralization device (3), the carbon dioxide neutralization device (3) comprises a neutralization tank and an injection device, and the injection device is used for injecting carbon dioxide into a water body in the neutralization tank;
the neutralization tank is provided with a water inlet and a water outlet,
the water outlet of the dehydration separation system (2) is connected with the water inlet of the neutralization pond through a first pipeline;
the water outlet of the neutralization pond is connected with the water inlet of the dehydration separation system (2) through a second pipeline.
2. The reclaimed water reuse treatment system according to claim 1, wherein the dehydration separation system (2) comprises at least two dehydration separation tanks, each of which is used for performing solid-liquid separation on sewage flowing through the dehydration separation tank;
in the dehydration separation tank, the water outlets of part of the dehydration separation tank are connected with the water inlet of the neutralization tank through a first pipeline, and the water inlets of the other dehydration separation tank are connected with the water outlet of the neutralization tank through a second pipeline.
3. The reclaimed water reuse treatment system according to claim 1, wherein a water inlet pump (10) is further connected in series to the first pipeline, and the water inlet pump (10) provides power for fluid flowing from the dehydration separation system (2) to the neutralization tank through the first pipeline;
the injection system comprises a mixing tank (9), the mixing tank (9) is connected in series on a first pipeline, and the mixing tank (9) is positioned at the outlet end of a water inlet pump (10);
the injection system also comprises a carbon dioxide gas source which is connected with the inner space of the mixing tank (9) through an air inlet pipe (11).
4. The system of claim 3 wherein the first conduit has a plurality of outlets at different locations in the neutralization tank.
5. The reclaimed water recycling treatment system according to claim 4, wherein a plurality of releasers are connected to the first pipeline, each releaser comprises a branch pipe (12) communicated with the first pipeline, a plurality of communication holes (13) communicated with the inner side and the outer side of each branch pipe (12) are formed in each branch pipe (12), and each communication hole (13) is used as the outlet.
6. The system for reclaimed water reuse treatment according to claim 5, wherein said releaser further comprises a pipe joint (14) and an axial flow pump (15);
any one of the releasers is: the branch pipe (12) is partially embedded into the pipe joint (14), the communication holes (13) are located on the inner side of the pipe joint (14), the axial flow pump (15) is installed in the pipe joint (14), and the axial flow pump (15) is used for driving fluid to flow from one end of the pipe joint (14) to the other end of the pipe joint (14).
7. The system for the reuse of reclaimed water in accordance with claim 6 wherein the pipe joint (14) is installed in a neutralization tank with an inclination.
8. The reclaimed water reuse treatment system according to claim 1, wherein the dehydration separation system (2) comprises a sedimentation tank, the sedimentation tank comprises a first sedimentation tank (19) and a second sedimentation tank (17), and the first sedimentation tank (19) and the second sedimentation tank (17) are both vertical sedimentation tanks;
the device also comprises a fluid communicating pipe (18) used for injecting the effluent of the first sedimentation tank (19) into the second sedimentation tank (17);
the water inlet and the water outlet on the dehydration separation system (2) are respectively as follows: the water inlet is arranged on the first sedimentation tank (19), and the water outlet is arranged on the second sedimentation tank (17);
and a filler component (16) is also arranged in the second sedimentation tank (17).
9. The reclaimed water reuse treatment system according to claim 8, wherein the first sedimentation tank (19) is a closed container, a pressure relief port is further provided on the top side of the first sedimentation tank (19), and a pressure relief device is connected to the pressure relief port;
water distributors are arranged in the first sedimentation tank (19) and the second sedimentation tank (17) and are of conical shell structures;
the water distributors are provided with a plurality of through holes, and the axes of the through holes are along the axis direction of the water distributors or along the wall thickness direction of the water distributors;
on the first sedimentation tank (19), the water distributor and the water inlet of the first sedimentation tank (19) are coaxially arranged with the first sedimentation tank (19), the water distributor is positioned below the water inlet of the first sedimentation tank (19), and the tip end of the water distributor is upward;
on the second sedimentation tank (17), the water distributors and the water outlets of the fluid communicating pipes (18) are coaxially arranged with the second sedimentation tank (17), the water distributors are positioned below the water outlets of the fluid communicating pipes (18) and the tips of the water distributors face upwards, the packing components (16) are positioned above the water outlets of the fluid communicating pipes (18), and the water outlets of the second sedimentation tank (17) are positioned above the packing components (16).
10. The reclaimed water recycling treatment system according to claim 8, wherein the water outlet of the fluid communicating pipe (18) is used as a part of the water inlet of the second sedimentation tank (17): the second sedimentation tank (17) comprises a first water inlet and a second water inlet, a water outlet of the fluid communicating pipe (18) is used as the first water inlet, and a water outlet of the neutralization tank is connected with the second water inlet.
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| WO2023226722A1 (en) * | 2022-05-24 | 2023-11-30 | 四川省铁路建设有限公司 | Regeneration reuse system and method for treatment of production wastewater of concrete mixing plant |
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