CN212425723U - Low-concentration ammonia nitrogen wastewater treatment system - Google Patents
Low-concentration ammonia nitrogen wastewater treatment system Download PDFInfo
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- CN212425723U CN212425723U CN202020887316.8U CN202020887316U CN212425723U CN 212425723 U CN212425723 U CN 212425723U CN 202020887316 U CN202020887316 U CN 202020887316U CN 212425723 U CN212425723 U CN 212425723U
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Abstract
The utility model relates to an ammonia nitrogen waste water treatment technical field, in particular to low concentration ammonia nitrogen effluent disposal system, it includes: the device comprises a grating pretreatment device and a purification device, wherein the grating pretreatment device comprises a box body, a water inlet, grating rake teeth and a water outlet, the grating rake teeth stretch across and are fixed in the box body, at least 4 layers are uniformly arranged in the height direction of the box body, and the grating rake teeth are used for treating solid suspended matters and large granular impurities in wastewater; the number of the purification devices is 2, the purification devices are communicated with a water outlet on the grating pretreatment device through a pipeline and are symmetrically arranged relative to the center of the grating pretreatment device; the purification devices are operated alternately at intervals and are used for the electrolytic treatment of waste water. Adopt alternate interval mode of operation when handling waste water through purifier to realize reaching better treatment effect in shorter time, be particularly suitable for handling some sewage that biochemical nature is poor, under area, with low costs, the energy consumption is little, do not have secondary pollution scheduling problem.
Description
Technical Field
The utility model relates to an ammonia nitrogen waste water treatment technical field, in particular to low concentration ammonia nitrogen effluent disposal system.
Background
The high-concentration ammonia nitrogen wastewater seriously harms the ecological environment due to large discharge amount, complex components and strong toxicity without treatment, thereby arousing great attention of people, and the further treatment of the low-concentration ammonia nitrogen wastewater is often easily ignored, so that the low-concentration ammonia nitrogen wastewater is discharged into a water body to cause water eutrophication, therefore, the method for practically and effectively removing the low-concentration ammonia nitrogen wastewater is urgently sought.
Along with the rapid development of industrialization in China, people pay more and more attention to the treatment of low-concentration ammonia nitrogen wastewater, and how to reduce the wastewater treatment cost while realizing the standard discharge of industrial wastewater becomes a problem which is increasingly concerned by people. Various devices or devices for degrading low-concentration ammonia nitrogen wastewater at home and abroad at the present stage have respective advantages and disadvantages. Although the device adopting the adsorption method has convenient operation, various adsorbents, low cost and reusability, the device has limited exchange capacity and frequent analysis and is often used with other equipment or subjected to advanced treatment; the device adopting the breakpoint chlorination method has the advantages of convenient operation, stable treatment effect and difficult influence of temperature, but the breakpoint is difficult to control and secondary pollution is easy to occur; the equipment adopting the biological method has the advantages of mature treatment process and good denitrification effect, but has high investment cost and long reaction time, and usually needs additional carbon sources, thereby limiting the development of the equipment.
In the prior art, a simple and efficient method for treating ammonia nitrogen wastewater with medium and low concentration (patent document No. CN104261594A) has the advantages of economy and high efficiency, can enable the ammonia nitrogen wastewater to reach the national discharge standard, and can improve the adsorption exchange capacity of cation resin on ammonia nitrogen at the same time, the invention has the technical characteristics that firstly, the pH of the ammonia nitrogen wastewater is adjusted to be more than 8, the ammonia nitrogen wastewater is precipitated for a period of time, when supernatant liquid has no suspended particles, the supernatant liquid is subjected to a nanofiltration device, and then nanofiltration effluent is fed into the cation exchange resin for ammonia nitrogen adsorption; a low-concentration ammonia nitrogen waste water adsorbs the treatment process method (patent document No. CN104445500A), characterized by, after activating the adsorbent in certain condition, is used in the treatment of low-concentration ammonia nitrogen waste water, and can still be used for waste water treatment after the adsorbent regenerates, this method is treated effectually, the adsorbent regenerates the low cost, the reusability is good; the invention relates to a treatment process of ultra-low concentration ammonia nitrogen wastewater (patent document No. CN110627248A), which adopts a stable gaseous film system to remove ammonia nitrogen, and has large mass transfer driving force and high mass transfer rate. The stable gaseous film system is suitable for various ammonia nitrogen absorption liquids, can obtain byproducts with higher concentration and purity according to the adjustment of the actual ammonia nitrogen concentration, and the byproducts can be recycled or sold externally to reduce the wastewater treatment cost. The three mentioned prior arts can realize the treatment of low-concentration ammonia nitrogen wastewater and have positive effects, but have the problems of large occupied area, high cost, large energy consumption, secondary pollution and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defect and the not enough of existing low concentration ammonia nitrogen effluent disposal of known existence, for this reason the utility model provides a low concentration ammonia nitrogen effluent disposal system can reach better treatment effect in shorter time, is particularly suitable for handling some sewage that the biochemical nature is poor.
In order to realize the above purpose, the utility model provides a low concentration ammonia nitrogen effluent disposal system, it includes: the device comprises a grating pretreatment device and a purification device, wherein the grating pretreatment device comprises a box body, a water inlet, grating rake teeth and a water outlet, the grating rake teeth stretch across and are fixed in the box body, at least 4 layers are uniformly arranged in the height direction of the box body, and the grating rake teeth are used for treating solid suspended matters and large granular impurities in wastewater; the number of the purification devices is 2, the purification devices are communicated with a water outlet on the grating pretreatment device through a pipeline and are symmetrically arranged relative to the center of the grating pretreatment device; the purification devices alternately operate at intervals and are used for the electrolytic treatment of wastewater.
Further, the purification device comprises an electrolysis device, a liquid inlet and a liquid outlet; the liquid inlet is communicated with the water outlet through a valve A and a centrifugal pump A.
Further, the electrolysis apparatus is a three-dimensional electrode apparatus.
Further, a third electrode in the three-dimensional electrode equipment is the smokeless coal columnar activated carbon which is installed and fixed in a fixed bed mode and evenly distributed in the three-dimensional electrode equipment.
Furthermore, the three-dimensional electrode equipment also comprises a high-pressure air stripping mechanism, the high-pressure air stripping mechanism is positioned at the upper end of the three-dimensional electrode equipment, one end of the high-pressure air stripping mechanism is connected with the centrifugal pump E, and the other end of the high-pressure air stripping mechanism is fixed on the three-dimensional electrode equipment; the high-pressure gas blowing-off mechanism is used for blowing high-pressure gas to the anthracite columnar activated carbon.
Furthermore, the three-dimensional electrode equipment also comprises a high-pressure water washing mechanism and a water storage tank, wherein the high-pressure water washing mechanism is positioned at the lower end of the three-dimensional electrode equipment and is communicated with the lower end of the water storage tank through a pipeline, a valve D and a centrifugal pump D; the high-pressure water washing mechanism is used for spraying high-pressure water to the anthracite columnar activated carbon.
The three-dimensional electrode equipment further comprises a water collecting tank and a mud-water centrifugal separation device, wherein the water collecting tank is located between the liquid outlet and the high-pressure water washing mechanism and is communicated with the mud-water centrifugal separation device through a pipeline, a valve B and a centrifugal pump B, the mud-water centrifugal separation device is located below the high-pressure water washing mechanism and is provided with a mud discharge pipe and a water discharge pipe, the water discharge pipe is communicated with the upper end of the water storage tank through a pipeline, a valve C and a centrifugal pump C, and the mud-water centrifugal separation device is used for separating mud from water.
Compared with the prior art, the beneficial effects of the utility model are that: the operation method is simple, no chemical agent is added, no secondary pollution is caused, the treatment cost is low, the equipment runs alternately, a better treatment effect can be achieved within a shorter time, and the method is particularly suitable for treating sewage with poor biochemical property.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein: the device comprises a grating pretreatment device 1, a purification device 2, a valve A3, a centrifugal pump A4, a valve B5, a centrifugal pump B6, a centrifugal pump E7, a centrifugal pump D8, a valve D9, a valve C10, a centrifugal pump C11, a box body 1.1, a water inlet 1.2, grating rake teeth 1.3, a water outlet 1.4, electrolysis equipment 2.1, a liquid inlet 2.2, a liquid outlet 2.3, anthracite columnar activated carbon 2.1.1, a high-pressure air blowing and separating mechanism 2.1.2, a high-pressure water flushing hole 2.1.3, a water storage tank 2.1.4, a water collecting tank 2.1.5, mud-water centrifugal separation equipment 2.1.6, a mud discharge pipe 2.6.1.1 and a water discharge pipe 2.1.6.2.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the utility model provides a low concentration ammonia nitrogen wastewater treatment system, which comprises: the device comprises a grating pretreatment device 1 and a purification device 2, wherein the grating pretreatment device 1 comprises a box body 1.1, a water inlet 1.2, grating rake teeth 1.3 and a water outlet 1.4, the grating rake teeth 1.3 stretch across and are fixed in the box body 1.1, at least 4 layers are uniformly arranged in the height direction of the box body 1.1, and the grating rake teeth 1.3 are used for treating solid suspended matters and large granular impurities in wastewater; the number of the purification devices 2 is 2, the purification devices are communicated with a water outlet 1.4 on the grating pretreatment device 1 through a pipeline and are symmetrically arranged relative to the center of the grating pretreatment device 1; the purification devices 2 are operated alternately and are used for the electrolytic treatment of waste water.
In some preferred embodiments of the present invention, the purification device 2 comprises an electrolysis apparatus 2.1, a liquid inlet 2.2 and a liquid outlet 2.3; the liquid inlet 2.2 is communicated with the water outlet 1.4 through a valve A3 and a centrifugal pump A4.
In some preferred embodiments of the present invention, the electrolysis device 2.1 is a three-dimensional electrode device.
In some preferred embodiments of the present invention, the third electrode in the three-dimensional electrode device is the smokeless coal column-shaped activated carbon 2.1.1, and the smokeless coal column-shaped activated carbon 2.1.1 is fixed and uniformly distributed in the three-dimensional electrode device by using a fixed bed method.
In some preferred embodiments of the present invention, the three-dimensional electrode equipment further includes a high-pressure air-stripping mechanism 2.1.2, the high-pressure air-stripping mechanism 2.1.2 is located at the upper end of the three-dimensional electrode equipment, and one end of the high-pressure air-stripping mechanism 2.1.2 is connected to the centrifugal pump E7, and the other end is fixed on the three-dimensional electrode equipment; the high-pressure gas stripping mechanism 2.1.2 is used for blowing high-pressure gas to the anthracite columnar activated carbon 2.1.1.
In some preferred embodiments of the present invention, the three-dimensional electrode device further comprises a high-pressure water washing mechanism 2.1.3 and a water storage tank 2.1.4, the high-pressure water washing mechanism 2.1.3 is located at the lower end of the three-dimensional electrode device and is communicated with the lower end of the water storage tank 2.1.4 through a pipeline, a valve D9 and a centrifugal pump D8; the high-pressure water washing mechanism 2.1.3 is used for spraying high-pressure water to the smokeless coal columnar activated carbon 2.1.1.
In some preferred embodiments of the present invention, the three-dimensional electrode device further comprises a water collecting tank 2.1.5 and a slurry-water centrifugal separation device 2.1.6; the water collecting tank 2.1.5 is positioned between the liquid outlet 2.3 and the high-pressure water washing mechanism 2.1.3, and the water collecting tank 2.1.5 is communicated with the mud-water centrifugal separation equipment 2.1.6 through a pipeline, a valve B5 and a centrifugal pump B6; the mud-water centrifugal separation device 2.1.6 is positioned below the high-pressure water washing mechanism 2.1.3, and the mud-water centrifugal separation device 2.1.6 is provided with a mud discharge pipe 2.1.6.1 and a water discharge pipe 2.1.6.2; the water outlet pipe 2.1.6.2 is communicated with the upper end of the water storage tank 2.1.4 through a pipeline, a valve C10 and a centrifugal pump C11; the mud-water centrifugal separation device 2.1.6 is used for separating mud and water.
More specifically, the embodiment of the utility model provides a when being used for low concentration ammonia nitrogen waste water treatment, at first waste water gets into grid preprocessing device 1 through water inlet 1.1, under grid rake teeth 1.3's effect, suspended solid and large granule impurity in the waste water are intercepted. And opening a valve A3, allowing the primarily treated wastewater to enter the right purification device 2 from a water outlet 1.4 under the action of a centrifugal pump A4, electrolyzing the pretreated wastewater under the action of three-dimensional electrode equipment, arranging a third electrode which is anthracite columnar activated carbon 2.1.1 in a fixed bed manner and uniformly distributing the activated carbon in the three-dimensional electrode equipment, and discharging the treated wastewater from a liquid outlet 2.3. After a period of treatment, the anthracite columnar activated carbon 2.1.1 serving as an adsorbent can reach a saturated state, the COD and ammonia nitrogen values of water discharged from the liquid outlet 2.3 are increased, the treatment efficiency is reduced, the valve A3 of the right purification device 2 needs to be closed, the valve A3 of the left purification device 2 is opened, the left purification device 2 is started to treat wastewater, and meanwhile, the anthracite columnar activated carbon 2.1.1 in the three-dimensional electrode equipment in the right purification device 2 is subjected to regeneration treatment. The regeneration treatment process of the anthracite columnar activated carbon 2.1.1 comprises the steps of opening a centrifugal pump E7, blowing off gas from the anthracite columnar activated carbon 2.1.1 through a high-pressure gas blowing-off mechanism 2.1.2, closing the gas blowing-off after a certain time, opening a valve D9 and a centrifugal pump D8, and washing the anthracite columnar activated carbon 2.1.1 through a high-pressure water washing mechanism 2.1.3 by high-pressure water. After the high-pressure gas and the liquid are blown off and washed, washing liquid enters a collecting tank 2.1.5, a valve B5 is opened, the washing liquid is conveyed to a mud-water centrifugal separation device 2.1.6 through a pipeline under the action of a centrifugal pump B6 for mud-water separation, a valve C10 is opened, clean water after mud-water separation is conveyed to a water storage tank 2.1.4 through the pipeline for use under the drive of a centrifugal pump C11, and sludge is conveyed to a designated container through a sludge discharge pipe 2.1.6.1 for centralized treatment. At this time, the process of recycling the anthracite columnar activated carbon 2.1.1 is realized. When the water quality COD and ammonia nitrogen value discharged from the liquid outlet 2.3 of the purification device 2 at the left side are increased and the treatment efficiency is reduced, the processes are circularly repeated, the purification devices 2 at the left side and the right side alternately operate at intervals, and the anthracite columnar activated carbon 2.1.1 can be recycled without delaying the treatment efficiency of sewage.
The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The above-described embodiments of the invention are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims, and not by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (7)
1. A low-concentration ammonia nitrogen wastewater treatment system comprises: the device comprises a grid pretreatment device (1) and a purification device (2), wherein the grid pretreatment device (1) comprises a box body (1.1), a water inlet (1.2), grid rake teeth (1.3) and a water outlet (1.4), and is characterized in that the grid rake teeth (1.3) span across and are fixed in the box body (1.1), at least 4 layers are uniformly arranged in the height direction of the box body (1.1), and the grid rake teeth (1.3) are used for treating solid suspended matters and large granular impurities in wastewater; the number of the purification devices (2) is 2, the purification devices are communicated with the water outlet (1.4) on the grating pretreatment device (1) through a pipeline and are symmetrically arranged relative to the center of the grating pretreatment device (1); the purification devices (2) are operated alternately at intervals and are used for the electrolytic treatment of waste water.
2. The low-concentration ammonia-nitrogen wastewater treatment system according to claim 1, wherein the purification device (2) comprises an electrolysis device (2.1), a liquid inlet (2.2) and a liquid outlet (2.3); the liquid inlet (2.2) is communicated with the water outlet (1.4) through a valve A (3) and a centrifugal pump A (4).
3. The low-concentration ammonia-nitrogen wastewater treatment system according to claim 2, characterized in that the electrolysis device (2.1) is a three-dimensional electrode device.
4. The system for treating the low-concentration ammonia-nitrogen wastewater as recited in claim 3, wherein the third electrode in the three-dimensional electrode device is a non-smoke coal columnar activated carbon (2.1.1), and the non-smoke coal columnar activated carbon (2.1.1) is fixedly installed in a fixed bed manner and uniformly distributed in the three-dimensional electrode device.
5. The low-concentration ammonia-nitrogen wastewater treatment system according to claim 4, characterized in that the three-dimensional electrode equipment further comprises a high-pressure gas stripping mechanism (2.1.2), the high-pressure gas stripping mechanism (2.1.2) is located at the upper end of the three-dimensional electrode equipment, one end of the high-pressure gas stripping mechanism (2.1.2) is connected with a centrifugal pump E (7), and the other end is fixed on the three-dimensional electrode equipment; the high-pressure gas stripping mechanism (2.1.2) is used for blowing high-pressure gas to the anthracite columnar activated carbon (2.1.1).
6. The low-concentration ammonia-nitrogen wastewater treatment system according to claim 4, characterized in that the three-dimensional electrode equipment further comprises a high-pressure water washing mechanism (2.1.3) and a water storage tank (2.1.4), wherein the high-pressure water washing mechanism (2.1.3) is positioned at the lower end of the three-dimensional electrode equipment and is communicated with the lower end of the water storage tank (2.1.4) through a pipeline, a valve D (9) and a centrifugal pump D (8); the high-pressure water flushing mechanism (2.1.3) is used for spraying high-pressure water to the anthracite columnar activated carbon (2.1.1).
7. The system for treating the low-concentration ammonia-nitrogen wastewater as claimed in claim 6, wherein the three-dimensional electrode equipment further comprises a water collecting tank (2.1.5), a mud-water centrifugal separation device (2.1.6); the water collecting tank (2.1.5) is positioned between the liquid outlet (2.3) and the high-pressure water washing mechanism (2.1.3), and the water collecting tank (2.1.5) is communicated with the mud-water centrifugal separation equipment (2.1.6) through a pipeline, a valve B (5) and a centrifugal pump B (6); the mud-water centrifugal separation equipment (2.1.6) is positioned below the high-pressure water washing mechanism (2.1.3), and the mud-water centrifugal separation equipment (2.1.6) is provided with a mud discharge pipe (2.1.6.1) and a water discharge pipe (2.1.6.2); the water discharge pipe (2.1.6.2) is communicated with the upper end of the water storage tank (2.1.4) through a pipeline, a valve C (10) and a centrifugal pump C (11); the mud-water centrifugal separation equipment (2.1.6) is used for separating mud and water.
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| CN202020887316.8U CN212425723U (en) | 2020-05-25 | 2020-05-25 | Low-concentration ammonia nitrogen wastewater treatment system |
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| CN202020887316.8U CN212425723U (en) | 2020-05-25 | 2020-05-25 | Low-concentration ammonia nitrogen wastewater treatment system |
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