Skid-mounted denitration catalyst regeneration sewage treatment device

Abstract

The utility model provides a skid-mounted denitration catalyst regeneration sewage treatment device which comprises a bottom frame, a denitration catalyst regeneration water tank and sewage purification equipment, the sewage purification equipment is fixed on the bottom frame, the denitration catalyst regeneration water tank is fixed on the sewage purification equipment, and the denitration catalyst regeneration water tank is fixed on the bottom frame. A drain outlet is formed in the bottom of the denitration catalyst regeneration water tank, and the denitration catalyst regeneration water tank is used for discharging sewage into the sewage purification equipment through the drain outlet. The sewage treatment device and the denitration catalyst regeneration water tank are fixed on the same bottom frame, so that on-site sewage treatment and synchronous hoisting and transferring are realized. The denitration catalyst regeneration sewage can directly enter the sewage treatment equipment and react in situ, and the treated effluent is conveyed to the denitration catalyst regeneration process through the pump and is reused in the denitration catalyst regeneration process, so that the discharge requirement can be met, and the water quality requirement of a denitration catalyst regeneration wet-method washing process can also be met.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a skid-mounted sewage treatment device for denitration catalyst regeneration. Background Art

[0002] Denitration catalysts are used in the denitration process of industrial production, which can reduce the emission of nitrates in the atmosphere and protect the environment. After long-term use, the denitration catalyst will gradually lose its activity, resulting in a decline in denitration efficiency, and finally needs to be replaced. The regeneration technology of waste denitration catalysts can restore the activity of deactivated catalysts, extend their service life and reduce costs.

[0003] Common regeneration methods of denitration catalysts such as pickling regeneration method, using acidic solution to treat waste denitration catalysts. However, during the regeneration process of denitration catalysts, sewage for denitration catalyst regeneration will inevitably be generated. The treatment of traditional sewage for denitration catalyst regeneration is generally set in a fixed factory area or place. The waste denitration catalysts to be regenerated generated by power plants are transported from the place of generation to the denitration catalyst regeneration site over a long distance by vehicles such as trucks. The transportation cost is high, and there are also environmental risks such as dust ash carried by the waste denitration catalysts themselves being scattered during transportation.

[0004] Therefore, it is necessary to propose a skid-mounted sewage treatment device for denitration catalyst regeneration to realize on-site treatment and reuse of sewage for denitration catalyst regeneration. When transferring, it can be directly lifted and transferred, reducing inputs such as transportation costs and reducing environmental risks. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a skid-mounted sewage treatment device for denitration catalyst regeneration to realize on-site treatment and reuse of sewage for denitration catalyst regeneration. When transferring, it can be directly lifted and transferred, reducing inputs such as transportation costs and reducing environmental risks.

[0006] According to an object of the utility model, the utility model provides a skid-mounted sewage treatment device for denitration catalyst regeneration, which includes a bottom frame, a denitration catalyst regeneration water tank and a sewage purification device. The sewage purification device is fixed on the bottom frame, the denitration catalyst regeneration water tank is fixed on the sewage purification device, a sewage discharge port is arranged at the bottom of the denitration catalyst regeneration water tank, and the denitration catalyst regeneration water tank discharges sewage into the sewage purification device through the sewage discharge port.

[0007] Further, the sewage purification device includes a sewage collection tank, a pre-sedimentation tank, an adjustment tank, a reaction tank, a membrane module and a reclaimed water tank. The reaction tank includes an anaerobic tank, an anoxic tank and an aerobic tank.

[0008] Further, the denitration catalyst regeneration water tank is fixed on the top of the sewage collection tank.

[0009] Furthermore, the denitration catalyst regeneration water pool includes a pickling pool, a neutralization pool and a flushing pool.

[0010] Furthermore, sewage discharge valves are provided on the pickling pool, the neutralization pool and the flushing pool.

[0011] Furthermore, a first lift pump is arranged inside the sewage collection pool, and the sewage in the sewage collection pool is lifted to the pre-sedimentation tank by the first lift pump.

[0012] Furthermore, the pre-sedimentation tank is connected to the regulation tank, and they are connected by an overflow baffle.

[0013] Furthermore, the regulation tank is connected to the anaerobic tank, and a second lift pump is arranged in the regulation tank. The second lift pump lifts the sewage in the regulation tank into the anaerobic tank.

[0014] Furthermore, the anaerobic tank is connected to the anoxic tank, and the anoxic tank is connected to the aerobic tank. A partition is provided between the anaerobic tank and the anoxic tank, and a partition is also provided between the anoxic tank and the aerobic tank.

[0015] Furthermore, an equipment room is also provided on the bottom frame.

[0016] The sewage treatment device and the denitration catalyst regeneration water pool of the technical solution of the present utility model are fixed on the same bottom frame, realizing on-site sewage treatment and synchronous hoisting and transportation. The denitration catalyst regeneration sewage can directly enter the sewage treatment equipment, react on-site, and the treated water is pumped to the denitration catalyst regeneration process and reused in the denitration catalyst regeneration process, which can not only meet the discharge requirements, but also meet the water quality requirements of the wet flushing process for denitration catalyst regeneration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0019] Figure 2 is a top view of the reaction tank of an embodiment of the present utility model;

[0020] Figure 3 is an internal structural diagram of the reaction tank of an embodiment of the present utility model;

[0021] In the figure: 1. Bottom frame; 2. Rubber wheel; 3. Sewage collection pool; 4. Pre-sedimentation tank; 5. Regulation tank; 6. Baffle; 7. Anaerobic tank; 8. Anoxic tank; 9. Aerobic tank; 10. Membrane module; 11. Reclaimed water tank; 12. Pickling tank; 13. Neutralization tank; 14. Flushing tank; 15. Equipment room. Specific embodiments

[0022] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined. In addition, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Embodiment 1

[0026] As Figures 1 - 3 shown,

[0027] A skid-mounted denitration catalyst regeneration sewage treatment device, comprising a bottom frame 1, a denitration catalyst regeneration water tank and sewage purification equipment. Among them, the sewage purification equipment is fixed on the bottom frame 1, and the denitration catalyst regeneration water tank is fixed on the sewage purification equipment. The sewage generated in the denitration catalyst regeneration water tank converges into the purification equipment, and the sewage is purified by the purification equipment.

[0028] At the bottom of the bottom frame 1, rubber wheels 2 with brakes are provided, which can facilitate the transfer of the bottom frame 1. When the equipment is installed for the first time, the bottom frame 1 can be conveniently transferred through the rubber wheels 2 with brakes. The bottom frame 1 is moved by a forklift or a trailer. When the bottom frame 1 reaches the installation position, the braking device of the rubber wheels 2 can be locked to complete the fixation.

[0029] Then, the denitration catalyst regeneration water tank is hoisted onto the purification equipment by a forklift or a crane, and the bolt connection holes at the bottom of the denitration catalyst regeneration water tank are aligned with the connection holes of the purification equipment, and the two are fixed by bolts.

[0030] In this embodiment, the sewage purification equipment includes a sewage collection tank 3, a pre-sedimentation tank 4, an adjustment tank 5, a reaction tank, a membrane module 10 and a recycled water tank 11; among them, the reaction tank includes an anaerobic tank 7, an anoxic tank 8 and an aerobic tank 9.

[0031] The sewage collection tank 3 is used to collect the wastewater in the denitration catalyst regeneration water tank. When the acidic, alkaline solutions and cleaning water in the denitration catalyst regeneration water tank need to be replaced, the waste liquid in the denitration catalyst regeneration water tank is put into the sewage collection tank 3 for collection.

[0032] Specifically, the denitration catalyst regeneration water tank is fixed on the top of the sewage collection tank 3. During installation, the denitration catalyst regeneration water tank is hoisted above the sewage collection tank 3, and the bottom of the denitration catalyst regeneration water tank is fixedly connected to the top of the sewage collection tank 3 by bolts.

[0033] The denitration catalyst regeneration water tank is fixed on the sewage treatment equipment. Specifically, the denitration catalyst regeneration water tank is fixed above the sewage collection tank 3. In this embodiment, the denitration catalyst water tank and the sewage collection tank 3 are connected by a number of bolts, which can realize the assembly and disassembly of the two.

[0034] The denitration catalyst regeneration water pool includes a pickling pool 12, a neutralization pool 13 and a flushing pool 14. The three areas are separated by partitions. The pickling pool 12 is filled with an acidic solution for treating waste catalysts. The waste catalysts are immersed in the acidic solution to dissolve and remove impurities and scale on the surface of the waste catalysts. Among them, a coating is provided inside the pickling pool 12 to prevent the acidic solution from corroding the pickling pool 12. Then, the acid-soaked catalysts are transferred to the neutralization pool 13, and the residual acidic solution on the surface of the catalysts is neutralized by the alkaline solution in the neutralization pool 13. Then the catalysts are transferred to the flushing pool 14, and the flushing pool 14 sprays clean water on the catalysts through a nozzle, and finally clean catalysts are obtained, completing the regeneration of the denitration catalysts. Through the pickling regeneration of the denitration catalyst regeneration water pool, the activity of the catalyst can be quickly restored, and the effect is remarkable. The finally generated sewage enters the sewage purification equipment for purification treatment.

[0035] Specifically, valves are provided on the pickling pool 12, the neutralization pool 13 and the flushing pool 14. The liquid in the corresponding pool can be put into the sewage collection pool 3 through the valves on the pickling pool 12, the neutralization pool 13 and the flushing pool 14. Since the denitration catalyst regeneration water pool is located on top of the sewage collection pool 3, the waste liquid in the pickling pool 12, the neutralization pool 13 or the flushing pool 14 can automatically flow into the sewage collection pool 3, facilitating the sewage treatment equipment to collect sewage.

[0036] A first lift pump is arranged inside the sewage collection pool 3. The sewage in the sewage collection pool 3 is lifted to the pre-sedimentation tank 4 by the first lift pump. The pre-sedimentation tank 4 is used to remove suspended solids and some heavy metals in the sewage.

[0037] The pre-sedimentation tank 4 is connected to the regulation tank 5. The pre-sedimentation tank 4 and the regulation tank are connected by an overflow plate. The clear water at the upper part of the pre-sedimentation tank 4 overflows to the regulation tank 5. Drugs such as sodium hypochlorite, sodium hydroxide and coagulant are added to the regulation tank 5. The sewage in the regulation tank 5 is clarified by sodium hypochlorite, sodium hydroxide and coagulant, etc., to remove suspended solids and colloids in the water.

[0038] The regulation tank 5 is connected to the anaerobic tank 7. A second lift pump is arranged inside the regulation tank 5. The second lift pump lifts the sewage in the regulation tank 5 into the anaerobic tank 7. A liquid level sensor is arranged inside the regulation tank 5. The liquid level sensor is connected to a controller for controlling the second lift pump. The controller automatically controls the start and stop of the second lift pump according to the liquid level situation.

[0039] The anaerobic tank 7 is connected to the anoxic tank 8, and the anoxic tank 8 is connected to the aerobic tank 9. There is a partition between the anaerobic tank 7 and the anoxic tank 8, and there is also a partition between the anoxic tank 8 and the aerobic tank 9. The sewage passes through the anaerobic tank 7, the anoxic tank 8 and the aerobic tank 9 in sequence. The sewage after reacting in the anaerobic tank 7 slowly escapes to the anoxic tank 8, and the sewage after reacting in the anoxic tank 8 slowly escapes to the aerobic tank 9.

[0040] Specifically, in this embodiment, the anaerobic tank 7 is a multi-compartment anaerobic tank, and several groups of baffle plates 6 are provided inside the anaerobic tank 7. The anaerobic tank 7 is separated by the baffle plates 6. Under the action of anaerobic bacteria in the anaerobic tank 7, the macromolecular organic matter in the sewage is decomposed.

[0041] The anaerobic tank 7 is provided with an overflow weir at the upper part of the tank. After the sewage passes through the overflow weir at the upper part of the anaerobic tank 7, it is transported downward through the sewage pipe to the bottom or lower part of the anoxic tank 8 and enters the aerobic tank 9 from the bottom or lower part of the anoxic tank 8.

[0042] A number of suspended fillers are provided in both the anoxic tank 8 and the aerobic tank 9. Two submersible mixers are installed in the anoxic tank 8, and the two submersible mixers are respectively arranged on the water inlet side and the water outlet side of the anoxic tank 8, and the two submersible mixers are arranged at different heights. The bottom of the aerobic tank 9 is equipped with a plurality of aeration devices and a plurality of water distributors for making the water entering from the anoxic tank 8 evenly distributed in the aerobic tank 9, and the plurality of water distributors and the plurality of aeration devices are arranged alternately.

[0043] A certain number of polypropylene plastic cylinder suspended fillers are added to both the anoxic tank 8 and the aerobic tank 9. The suspended filler has a relatively light self-weight, good hydrophilicity, and a relatively high specific surface area, which can effectively increase the biomass and biological species in the anoxic tank 8 and the aerobic tank 9, thereby improving the sewage treatment efficiency.

[0044] A membrane module 10 is provided in the aerobic tank 9. The membrane module 10 includes an activated carbon filter membrane and a polystyrene foam filter bead membrane in sequence. The treated water body is pushed up by the airflow of the aeration device in the aerobic tank and enters the membrane module 10, and enters the recycled water tank 11 after passing through the activated carbon filter membrane and the polystyrene foam filter bead membrane in sequence.

[0045] In this embodiment, an equipment room 15 is further provided on the bottom frame 1. The equipment room 15 is used for installing power supply equipment, control equipment, maintenance equipment, chemical dosing equipment, etc.

[0046] When the utility model works: After the bottom frame 1 is transferred to a suitable position and fixed, the sewage treatment equipment is installed on the bottom frame 1, and then the denitration catalyst regeneration water tank is fixedly installed on the sewage treatment equipment.

[0047] The denitration catalyst regeneration water tank is arranged above the sewage collection tank 3. After the reaction of the denitration catalyst regeneration water tank is completed, the wastewater can automatically flow into the sewage collection tank 3 through the opened valve for collection.

[0048] The sewage in the sewage collection tank 3 is lifted to the pre-sedimentation tank 4 by the first lift pump. After preliminary sedimentation and hydrolysis acidification in the pre-sedimentation tank 4, the supernatant overflows into the regulation tank 5.

[0049] The second lifting pump in the regulating tank 5 is automatically started and stopped by the liquid level sensor and controller according to the liquid level, and the sewage is lifted into the reaction tank, and anaerobic, anoxic and aerobic reactions are carried out in the anaerobic tank 7, the anoxic tank 8 and the aerobic tank 9 in turn, COD is degraded and nitrogen and phosphorus are removed synchronously, and the treated water can be separated from mud and water. The membrane assembly 10 is used for mud and water separation, and the effluent after filtration by the membrane group enters the reuse water tank 11.

[0050] The effluent after the above treatment can be pumped to the wet flushing tank 14 in the denitrification catalyst regeneration process and reused in the denitrification catalyst regeneration process, which can meet both the emission requirements and the water quality requirements of the denitrification catalyst regeneration wet flushing process.

[0051] The utility model sewage treatment device and the denitration catalyst regeneration water tank are fixed on the same bottom frame 1, realizing on-site sewage treatment and synchronous lifting and transportation. Lifting ports are respectively provided on the bottom frame 1, the sewage treatment equipment and the denitration catalyst regeneration water tank for convenient lifting. When the operation team moves to another site, the sewage collection tank 3, the pre-sedimentation tank 4 and other parts of the sewage treatment equipment can be partially drained to reduce the weight, and directly lifted to the transfer vehicle, and transferred synchronously with other mobile facilities.

[0052] The utility model treats wastewater in the pre-sedimentation tank 4, the regulating tank 5, the reaction tank and the membrane assembly 10 in sequence before entering the reuse water tank 11, thereby realizing on-site reuse of denitration catalyst regeneration wastewater; at the same time, on-site treatment of denitration catalyst regeneration wastewater and synchronous lifting and transportation are realized.

[0053] The utility model skid-mounted denitration catalyst regeneration wastewater treatment device can directly enter the wastewater treatment equipment for on-site reaction. The treated effluent is pumped to the wet flushing tank in the denitration catalyst regeneration process and reused in the denitration catalyst regeneration process, which can meet both the emission requirements and the water quality requirements of the denitration catalyst regeneration wet flushing process. The utility model can cooperate with the working conditions of frequent transfer, transfer synchronously with other mobile devices, and can be directly transported. It can be put into use again after landing and powering on.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A skid-mounted denitration catalyst regeneration sewage treatment device, characterized in that: It includes a bottom frame, a denitration catalyst regeneration water pool and a sewage purification device, wherein the sewage purification device is fixed on the bottom frame, the denitration catalyst regeneration water pool is fixed on the sewage purification device, a sewage outlet is provided at the bottom of the denitration catalyst regeneration water pool, and the denitration catalyst regeneration water pool discharges sewage into the sewage purification device through the sewage outlet.

2. The skid-mounted denitration catalyst regeneration sewage treatment device according to claim 1 is characterized in that: The sewage purification equipment comprises a sewage collection tank, a pre-sedimentation tank, a regulating tank, a reaction tank, a membrane assembly and a reuse water tank, and the reaction tank comprises an anaerobic tank, an anoxic tank and an aerobic tank.

3. The skid-mounted denitration catalyst regeneration sewage treatment device according to claim 2 is characterized in that: The denitration catalyst regeneration water tank is fixed on the top of the sewage collection tank.

4. The skid-mounted denitration catalyst regeneration sewage treatment device according to claim 1 is characterized in that: The denitration catalyst regeneration water pool includes a pickling pool, a neutralization pool and a flushing pool.

5. The skid-mounted denitration catalyst regeneration sewage treatment device according to claim 4 is characterized in that: The pickling tank, the neutralization tank and the flushing tank are all provided with sewage valves.

6. The skid-mounted denitration catalyst regeneration sewage treatment device according to claim 2 is characterized in that: A first lifting pump is arranged inside the sewage collection tank, and the sewage in the sewage collection tank is lifted to the pre-sedimentation tank by the first lifting pump.

7. The skid-mounted denitration catalyst regeneration sewage treatment device according to claim 2 is characterized in that: The pre-sedimentation tank is connected to the regulating tank, and the pre-sedimentation tank and the regulating tank are connected via an overflow plate.

8. The skid-mounted denitration catalyst regeneration sewage treatment device according to claim 2 is characterized in that: The regulating tank is connected to the anaerobic tank. A second lifting pump is arranged in the regulating tank. The second lifting pump lifts the sewage in the regulating tank into the anaerobic tank.

9. The skid-mounted denitration catalyst regeneration sewage treatment device according to claim 2 is characterized in that: The anaerobic tank is connected to the anoxic tank, the anoxic tank is connected to the aerobic tank, a partition is arranged between the anaerobic tank and the anoxic tank, and a partition is also arranged between the anoxic tank and the aerobic tank.

10. The skid-mounted denitration catalyst regeneration sewage treatment device according to claim 1 is characterized in that: An equipment room is also provided on the bottom frame.

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