Water treatment device for treating acetate wastewater

Abstract

The utility model relates to a water treatment device for treating acetate wastewater. The water treatment device comprises a coagulation tank, a magnetic loading tank, a flocculation tank, a clarification device, a magnetic sludge pump, a magnetic recovery device and a sludge collection tank which are connected in sequence, the acetate wastewater sequentially enters the magnetic loading tank and the flocculation tank from a water inlet of the coagulation tank, and one end of the flocculation tank is communicated with the clarification device; the bottom of the clarification device is connected with a magnetic sludge pump through a sludge outlet; the magnetic mud pump is respectively connected with the magnetic loading tank and the magnetic recovery device through a magnetic mud outlet; one end of the magnetic recovery device is also connected with a sludge collection tank; the device has the advantages that CODcr and total phosphorus in acetate wastewater with different concentrations can be well removed, meanwhile, the device also has a good removal effect on total nitrogen, SS, sulfate and the like, the treatment range is wide, the adaptability is high, complex pretreatment is not needed, the device can bear water quality changes with great fluctuation, and the treatment load is high.

Description

TECHNICAL FIELD

[0001] The utility model belongs to resource environmental protection technical field relates to handle ester wastewater's water treatment device. BACKGROUND

[0002] At present, the ester wastewater treatment process is constantly improved due to environmental protection requirements, generally, the method for treating ester wastewater includes physical treatment, chemical treatment and biological treatment. The organic CODcr of ester wastewater is usually more than 2000mg / L, and the pH value is usually about 4, the wastewater not only has many organic impurities, but also has a high proportion of inorganic impurities such as magnesium sulfate and calcium sulfate, and the wastewater composition greatly interferes with the formation of insoluble phosphorus salt.

[0003] At present, the existing traditional acetic acid wastewater treatment process includes the acid-base neutralization method using soda ash or lime, the disadvantage of which is that it can only treat a small amount of low-concentration wastewater, and can only neutralize acidic substances, and cannot reduce the COD value. The adsorption method using porous media to adsorb waste pollutants is only suitable for treating low-concentration wastewater, and is limited by the adsorbent capacity and subsequent treatment is more difficult, and it is difficult to popularize in industrial application. The membrane separation has good treatment effect, but the equipment cost of the method is high, and the membrane preparation is complex, the price is high, and the separation cost is high, and it is difficult to popularize. There is also a synthesis method for reacting concentrated ester wastewater with other substances to generate acetate or ester, which can reduce most of the COD of wastewater, but the energy and material cost consumed by crystallization and separation during concentration is high, and the treatment of low-concentration wastewater as byproduct is also a problem. At present, the biochemical method is more commonly used, but because of the instability of the ester wastewater inlet, when the organic matter content in the wastewater is high, the microorganisms are easy to be poisoned, causing the system to be unstable, and the water quality of the effluent will have great fluctuations. UTILITY MODEL CONTENTS

[0004] The utility model discloses a water treatment device for treating ester wastewater.

[0005] To achieve the above-mentioned purpose, the utility model takes the technical scheme that

[0006] A water treatment device for treating ester wastewater, comprising a coagulation tank, a magnetic loading tank, a flocculation tank, a clarification device, a magnetic sludge pump, a magnetic recovery device and a sludge collection tank connected in sequence.

[0007] The water inlet is arranged on the coagulation tank, and the acetate wastewater enters the coagulation tank, the magnetic loading tank and the flocculation tank in sequence from the water inlet of the coagulation tank; one end of the flocculation tank is provided with a water outlet, and the water outlet and the clarifying device are communicated with each other; the bottom of the clarifying device is provided with a sludge outlet, and the sludge outlet and the magnetic sludge pump are connected with each other; the magnetic sludge pump is provided with a magnetic sludge outlet, and the magnetic sludge outlet is connected with the magnetic loading tank and the magnetic recovery device; one end of the magnetic recovery device is further connected with a sludge collecting tank.

[0008] Preferably, a magnetic medium powder adding machine is further arranged above the magnetic loading tank, and the magnetic medium powder adding machine is used for adding magnetic medium powder into the magnetic loading tank.

[0009] Preferably, an electric sludge scraping device is arranged in the clarifying device, and the electric sludge scraping device is used for preventing the sludge deposited on the bottom of the clarifying device from being hardened and keeping the sludge outlet unblocked.

[0010] Preferably, the electric sludge scraping device is a special four-arm sludge scraper, and four mechanical arms are symmetrically arranged at the bottom of the central transmission shaft of the electric sludge scraping device; a scraper is arranged on each mechanical arm, and the electric sludge scraping device drives the scraper to scrape the sludge containing the magnetic medium powder in the bottom area of the tank by operating the mechanical arms.

[0011] Preferably, the sludge outlet at the bottom of the clarifying device is connected with a first pipeline, and the two ends of the first pipeline are connected with the clarifying device and the magnetic sludge pump respectively.

[0012] Preferably, a backwashing device is further connected with the sludge outlet, and the backwashing device is used for flushing the sludge outlet and the first pipeline, removing the blocked magnetic sludge and ensuring the pipeline unblocked.

[0013] Preferably, the magnetic sludge pump is used for directly sending part of the magnetic sludge flowing out of the bottom of the clarifying device back to the magnetic loading tank, so that the magnetic sludge participates in the flocculation reaction again; the magnetic sludge pump and the magnetic loading tank are connected through a second pipeline; another part of the magnetic sludge flowing out of the bottom of the clarifying device is sent into the magnetic recovery device through the magnetic sludge pump, so that the magnetic sludge is separated; the magnetic sludge pump and the magnetic recovery device are connected through a third pipeline.

[0014] Preferably, the magnetic recovery device is used for separating the magnetic medium powder from the magnetic sludge and sending the separated sludge into the sludge collecting tank and the magnetic medium back into the magnetic loading tank.

[0015] Preferably, the magnetic recovery device and the sludge collecting tank are connected through a fourth pipeline; the magnetic recovery device and the magnetic loading tank are connected through a fifth pipeline.

[0016] Preferably, a permanent magnetic corrugated induction roller is arranged on the magnetic recovery device, and the permanent magnetic corrugated induction roller is used to improve the recovery rate of the magnetic medium powder.

[0017] By adopting the technical scheme, the utility model has the advantages of:

[0018] 1. The utility model discloses a magnetic medium powder feeding machine which replaces the traditional manual feeding of the magnetic coagulation sedimentation water treatment process, and the feeding amount of the magnetic medium powder can be automatically controlled according to the water inflow and water quality change by arranging the magnetic medium powder feeding machine.

[0019] 2. The utility model discloses a magnetic medium powder feeding machine which replaces the traditional manual feeding of the magnetic coagulation sedimentation water treatment process, and the feeding amount of the magnetic medium powder can be automatically controlled according to the water inflow and water quality change by arranging the magnetic medium powder feeding machine.

[0020] 3. The utility model discloses a magnetic medium powder feeding machine which replaces the traditional manual feeding of the magnetic coagulation sedimentation water treatment process, and the feeding amount of the magnetic medium powder can be automatically controlled according to the water inflow and water quality change by arranging the magnetic medium powder feeding machine.

[0021] 4. The utility model discloses a magnetic medium powder feeding machine which replaces the traditional manual feeding of the magnetic coagulation sedimentation water treatment process, and the feeding amount of the magnetic medium powder can be automatically controlled according to the water inflow and water quality change by arranging the magnetic medium powder feeding machine.

[0022] 5. The utility model discloses a magnetic medium powder feeding machine which replaces the traditional manual feeding of the magnetic coagulation sedimentation water treatment process, and the feeding amount of the magnetic medium powder can be automatically controlled according to the water inflow and water quality change by arranging the magnetic medium powder feeding machine. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic view of the water treatment device for treating ester wastewater according to the utility model.

[0024] Figure 2 It is a structural schematic view of the electric mud scraping device according to the utility model.

[0025] Figure 3 It is a sectional view of the magnetic recovery device according to the utility model.

[0026] The reference signs are shown as follows:

[0027] 1, coagulation tank; 11, water inlet;

[0028] 2, magnetic loading tank; 21, magnetic medium powder adding machine; 3, flocculation tank; 31, water outlet;

[0029] 4, clarifier; 41, sludge outlet;

[0030] 42, electric sludge scraping device; 43, mechanical arm; 44, scraper;

[0031] 5, magnetic sludge pump; 51, magnetic sludge outlet;

[0032] 6, magnetic recovery device; 61, permanent magnetic corrugated induction roller; 62, magnetic roller;

[0033] 7, sludge collection tank; 8, backwashing device; 81, first pipeline; 82, second pipeline;

[0034] 83, third pipeline; 84, fourth pipeline; 85, fifth pipeline. DETAILED DESCRIPTION

[0035] Please refer to the attached Figures 1-3 The utility model mainly provides a kind of water treatment device for treating ester waste water, including coagulation tank 1, magnetic loading tank 2, flocculation tank 3, clarifier 4, magnetic sludge pump 5, magnetic recovery device 6 and sludge collection tank 7 connected in sequence;Wherein, coagulation tank 1 is provided with water inlet 11, and ester waste water enters coagulation tank 1, magnetic loading tank 2 and flocculation tank 3 from the water inlet 11 of coagulation tank 1 in sequence, in the embodiment, coagulation tank 1, magnetic loading tank 2, flocculation tank 3 are interconnected, and the built-in water inlet / outlet is set with low-high arithmetic progression (such as Figure 1The ester wastewater is treated and discharged conveniently. In addition, when the ester wastewater passes through the coagulation tank 1, the magnetic loading tank 2 and the flocculation tank 3, the reagents are added respectively, such as the coagulant is added when the ester wastewater passes through the coagulation tank 1, the magnetic medium powder is added when the ester wastewater passes through the magnetic loading tank 2 (the magnetic medium powder is Fe3O4 powder, and the Fe3O4 powder is sieved to have a particle size range of 15 μm to 75 μm), and the coagulant aid (the flocculant is a mixture of polyferric sulfate (PFS) or polyaluminum chloride (PAC) and polyacrylamide (PAM), or other materials or combinations of materials) is added when the ester wastewater passes through the flocculation tank 3, so that the coagulation and flocculation reaction of the ester wastewater is carried out. During the reaction, the reagents and the wastewater are fully mixed by the same structure of the stirring machine (the stirring machine includes a stirring motor and a stirring shaft connected with the stirring motor, the stirring shaft is connected with the stirring blades arranged on the top of the coagulation tank, the magnetic loading tank and the flocculation tank and arranged in the coagulation tank, the magnetic loading tank and the flocculation tank for stirring the wastewater, and the stirring motor is used to provide stirring power for the stirring shaft and the stirring blades) arranged on the coagulation tank, the magnetic loading tank and the flocculation tank. After the mixing, the pollutants in the ester wastewater form the flocculent sludge containing the magnetic agent with the reagents, and the wastewater containing the sludge flows into the clarifier 4 through the water outlet 31 of the flocculation tank. The sludge outlet 41 is arranged at the bottom of the clarifier 4 and is connected with the magnetic sludge pump 5. The magnetic sludge pump 5 is provided with the magnetic sludge outlet 51 which is connected with the magnetic loading tank 2 and the magnetic recovery device 6. The magnetic sludge pump 5 is used to directly send part of the magnetic sludge flowing out of the bottom of the clarifier 4 back to the magnetic loading tank 2 for participating in the flocculation reaction again and recycling the remaining reagents contained in the magnetic sludge. The other part of the magnetic sludge is sent to the magnetic recovery device 6 for the deflocculation and separation of the magnetic sludge. One end of the magnetic recovery device 6 is further connected with the sludge collecting tank 7. The magnetic recovery device 6 is used to separate the magnetic medium powder from the magnetic sludge and send the separated sludge to the sludge collecting tank 7 and recycle the magnetic medium to the magnetic loading tank 2.

[0036] It should be noted that: the device is introduced into the field by the magnetic coagulation sedimentation water treatment technology, which overcomes the shortcomings of the traditional wastewater treatment process. In the process, iron or aluminum salt reagent is used as a coagulant, and magnetic medium powder is used as a flocculation nucleus to accelerate the flocculation precipitation. Not only does it have a good removal rate for CODcr and suspended solids, but it also has a good removal effect on total phosphorus, sulfate, and total nitrogen. The process does not introduce additional pollutants, and it has no negative impact on the color and pH of the effluent. In addition, the magnetic coagulation sedimentation water treatment technology requires a smaller equipment volume and less construction space, making it suitable for high-density construction and equipment in chemical plants. It has strong impact load capacity, and the internal dosing amount and sludge return flow can be adjusted according to the water conditions. It can also maintain stable operation under high water volume or high pollution load conditions. At the same time, it can be controlled intelligently, requiring only personnel to patrol and check regularly, and simple routine maintenance.

[0037] In this embodiment, in order to reduce the work burden of traditional manual dosing, a magnetic medium powder dosing machine 21 is also provided above the magnetic loading tank 2. The magnetic medium powder dosing machine 21 is used to add magnetic medium powder to the magnetic loading tank. In order to facilitate operation, it can be connected to the magnetic medium powder dosing machine through an automatic control system, so that it can automatically control the dosing amount of magnetic medium powder according to the water inflow and water quality changes. The magnetic medium powder dosing machine is used to replace the traditional manual dosing of the magnetic coagulation sedimentation water treatment process, avoiding fluctuations in the effluent water quality caused thereby.

[0038] In this embodiment, an electric mud scraping device 42 is provided in the clarifying device 4. The electric mud scraping device is used to prevent the sedimentation of magnetic sludge at the bottom of the clarifying device from being hardened, to maintain the flowability of the settled magnetic sludge at the bottom, and to avoid clogging the sludge outlet. The sludge outlet is kept unobstructed. In the process, the electric mud scraping device is a dedicated four-arm mud scraper (as shown in Figure 2 The center transmission shaft has four symmetrically distributed mechanical arms 43, which can uniformly cover the entire tank bottom area during rotation. A scraper 44 is provided on the mechanical arm 43. The electric mud scraping device drives the scraper to scrape the magnetic medium powder-containing sludge in the tank bottom area by operating the mechanical arm.

[0039] In this embodiment, the sludge outlet 41 at the bottom of the clarifying device 4 is connected to a first pipeline 81, and the two ends of the first pipeline 81 are respectively connected to the clarifying device 4 and the magnetic sludge pump 5. A backwashing device 8 is also connected to the sludge outlet. The backwashing device 8 is used to flush the sludge outlet 41 and the first pipeline 81. When the backwashing device 8 is started, a high-pressure water flow will flush the sludge outlet and the magnetic sludge pipeline at the same time, removing the clogged magnetic sludge and ensuring the smoothness of the pipeline.

[0040] In this embodiment, the magnetic mud pump 5 is used to directly return part of the magnetic sludge flowing out of the bottom of the clarifier 4 to the magnetic loading tank 2 for participating in the flocculation reaction again and reusing the residual reagent contained therein that has not fully reacted; wherein, the magnetic mud pump 5 and the magnetic loading tank 2 are connected by setting a second pipeline 82, and during the process, the second pipeline 82 is used to realize the direct transportation of part of the magnetic sludge between the magnetic mud pump and the magnetic loading tank; another part of the magnetic sludge flowing out of the bottom of the clarifier is sent to the magnetic recovery device 6 by the magnetic mud pump for deflocculation and separation of the magnetic sludge, wherein the magnetic mud pump 5 and the magnetic recovery device 6 are interconnected by a third pipeline 83; during the process, the third pipeline 83 is used to realize the recovery of another part of the magnetic sludge between the magnetic mud pump and the magnetic recovery device.

[0041] In this embodiment, the magnetic recovery device 6 is used to separate the magnetic medium powder and sludge in the magnetic sludge, and send the separated sludge into the sludge collection tank 7, and recover the magnetic medium and send it back into the magnetic loading tank 2; wherein, the magnetic recovery device 6 and the sludge collection tank 7 are interconnected by setting a fourth pipe 84; the magnetic recovery device 6 and the magnetic loading tank 2 are interconnected by setting a fifth pipe 85; during the process, the separation and recovery of sludge and magnetic medium are respectively realized through the fourth pipe 84 and the fifth pipe 85.

[0042] like Figure 3 As shown, in this embodiment, a permanent magnetic corrugated induction roller 61 is provided on the magnetic recovery device 6. The permanent magnetic corrugated induction roller 61 uses a magnetic field to seamlessly transfer the magnetic medium from the magnetic drum 62 out of the magnetic medium separator and drop it into the magnetic loading pool to improve the recovery rate of the magnetic medium powder. The principle is that the magnetic powder remaining on the surface of the magnetic drum that cannot be cleaned by the scraper is adsorbed by the magnetic induction roller, thereby avoiding these magnetic powders from entering the sludge and being treated, thereby improving the recovery rate.

[0043] It should be noted that: this device has made pioneering innovations in the field of acetate wastewater treatment, and introduced a new technology that has not been used in previous treatment methods, the magnetic coagulation sedimentation water treatment process, into the industry; the treatment of acetate wastewater only requires simple sedimentation of large particles or easily sedimented materials in the pre-sedimentation tank before it can be passed into the device, without the need for complex pre-treatment methods such as pH adjustment or adsorption; during the process, the magnetic loading tank feeding device is a magnetic medium powder dosing machine instead of traditional manual dosing; the electric scraper device of the clarifier of the treatment device is a special four-arm scraper; the sludge outlet at the bottom of the clarifier is equipped with Backwash device; the magnetic recovery device is equipped with a permanent magnetic corrugated induction roller to effectively improve the recovery rate of magnetic medium powder; this device has a fast processing speed, and the entire process only takes 25-30 minutes. It has a high processing load bearing capacity and is also extremely resistant to water quality changes (CODcr variation range is 1000-20000 mg / L); the magnetic medium powder added during the treatment process can be repeatedly recycled in the recovery device with minimal loss. At the same time, through the circulation of magnetic medium powder, consumable reagents are fully utilized, which reduces the input amount and further reduces the treatment cost.

[0044] The utility model also provides a new water treatment process for treating acetate wastewater, and the steps of using the process are as follows:

[0045] Step 1: Input the acetate wastewater to be treated into the coagulation device and wait for the influent to remain stable;

[0046] Step 2: Turn on the coagulation tank stirring device, magnetic powder stirring device and flocculation stirring device in sequence;

[0047] Step 3: Turn on the dosing system of the device and add coagulant, magnetic medium powder and flocculant;

[0048] Step 4: The wastewater after the coagulation and flocculation reaction is introduced into the clarification device, and the electric scraper device is turned on;

[0049] Step 5: Start the magnetic mud pump, turn on the magnetic recovery device, and guide the sludge into the sludge collection tank for further treatment;

[0050] Step 6: Drain the supernatant of the treated wastewater into a collection tank for further treatment.

[0051] It should be noted that the utility model has low cost and high efficiency. When treating acetate wastewater, it has excellent removal effects on CODcr and total phosphorus (CODcr removal rate>50%, total phosphorus removal rate>80%), and also has good removal effects on total nitrogen, SS, sulfate, etc.; it occupies a small area, and can be controlled at a minimum of 20m 2 It consumes little power and can realize unattended automatic operation and remote control without frequent maintenance.

[0052] The above related description and the description of the embodiments are for facilitating the ordinary skilled in the art to understand and apply the present application. Those skilled in the art can obviously easily make various modifications to these contents, and apply the general principles described herein to other embodiments without creative labor. Therefore, the present application is not limited to the above related description and the description of the embodiments, and the improvements and modifications made by those skilled in the art according to the disclosure of the present application without departing from the scope of the present application should be within the protection scope of the present application.

Claims

1. A water treatment device for treating acetic ester wastewater, characterized by comprising: The device comprises a coagulation tank, a magnetic loading tank, a flocculation tank, a clarifying device, a magnetic sludge pump, a magnetic recovery device and a sludge collecting tank connected in sequence. The coagulation tank is provided with a water inlet, and the acetate wastewater enters the coagulation tank, the magnetic loading tank and the flocculation tank in sequence from the water inlet of the coagulation tank. One end of the flocculation tank is provided with a water outlet, and the water outlet and the clarifying device are connected with each other. The bottom of the clarifying device is provided with a sludge outlet, and the sludge outlet and the magnetic sludge pump are connected with each other. The magnetic sludge pump is provided with a magnetic sludge outlet, and the magnetic sludge outlet is connected with the magnetic loading tank and the magnetic recovery device. One end of the magnetic recovery device is further connected with a sludge collecting tank.

2. The water treatment apparatus for treating acetic ester wastewater according to claim 1, wherein The magnetic loading tank is further provided with a magnetic medium powder feeding machine above, which is used for feeding magnetic medium powder into the magnetic loading tank.

3. The water treatment apparatus for treating acetic ester wastewater according to claim 1, wherein The clarifying device is provided with an electric sludge scraping device, which is used for preventing the sedimentation of magnetic sludge on the bottom of the clarifying device and keeping the sludge outlet unobstructed.

4. The water treatment apparatus for treating acetic ester wastewater according to claim 3, wherein The electric sludge scraping device is a special four-arm sludge scraper, and the center transmission shaft is provided with four symmetrical mechanical arms at the bottom. The mechanical arms are provided with scrapers, and the electric sludge scraping device drives the scrapers to scrape the sludge containing magnetic medium powder on the bottom of the tank by operating the mechanical arms.

5. The water treatment apparatus for treating acetic ester wastewater according to claim 1, wherein The sludge outlet at the bottom of the clarifying device is connected with a first pipeline, and the two ends of the first pipeline are connected with the clarifying device and the magnetic sludge pump respectively.

6. The water treatment apparatus for treating acetic ester wastewater according to claim 5, wherein The sludge outlet is further connected with a backwashing device, which is used for flushing the sludge outlet and the first pipeline to remove the blocked magnetic sludge and ensure the smoothness of the pipeline.

7. The water treatment apparatus for treating acetic ester wastewater according to claim 1, wherein The magnetic sludge pump is used for directly sending part of the magnetic sludge flowing out from the bottom of the clarifying device back to the magnetic loading tank for participating in the flocculation reaction again. The magnetic sludge pump and the magnetic loading tank are connected through a second pipeline. Another part of the magnetic sludge flowing out from the bottom of the clarifying device is sent into the magnetic recovery device by the magnetic sludge pump for deflocculation and separation of the magnetic sludge. The magnetic sludge pump and the magnetic recovery device are connected through a third pipeline.

8. The water treatment apparatus for treating acetic ester wastewater according to claim 7, wherein The magnetic recovery device is used for separating the magnetic medium powder from the magnetic sludge and sending the separated sludge into the sludge collecting tank, and the magnetic medium is recycled and sent into the magnetic loading tank.

9. The water treatment apparatus for treating acetic ester wastewater according to claim 8, wherein The magnetic recovery device and the sludge collecting tank are connected through a fourth pipeline, and the magnetic recovery device and the magnetic loading tank are connected through a fifth pipeline.

10. The water treatment apparatus for treating acetic ester wastewater according to claim 8, wherein The magnetic recovery device is provided with a permanent magnetic corrugated induction roller, which is used for improving the recovery rate of the magnetic medium powder.

Images