Purification system for treating waste water of fireworks factory

Abstract

The utility model relates to the technical field of wastewater purification, in particular to a purification system for treating wastewater of a fireworks factory. The purification system comprises an immersed ultrafilter, a multi-medium filter, a precision filter, a first-stage reverse osmosis filter and a second-stage reverse osmosis filter which are sequentially arranged in the water flow purification direction and are communicated with one another, a water inlet of the immersed ultrafilter is communicated with a raw water collecting tank in which waste water of the fireworks factory is stored; a booster pump is arranged on a pipeline between the immersed ultrafilter and the multi-medium filter; and a water outlet of the secondary reverse osmosis filter is communicated with the water producing tank. When the perchlorate wastewater treatment device is used for treating the perchlorate wastewater of the fireworks factory, the discharge standard that the concentration of the perchlorate is not higher than 0.7 mg / L can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater purification, in particular to a purification system for treating wastewater from a fireworks factory. Background Art

[0002] When producing firecrackers and fireworks, fireworks factories tend to produce high-concentration perchlorate wastewater; if it is discharged directly, it will pollute the environment. According to the requirements of the environmental protection department, the perchlorate wastewater from fireworks factories needs to be purified. At present, the industry generally uses chemical treatment methods to treat perchlorate wastewater from fireworks factories, that is, adding certain chemicals to the wastewater to degrade pollutants through chemical reactions. However, this chemical treatment method does not completely degrade perchlorate when treating perchlorate wastewater from fireworks factories, which easily leads to perchlorate residues exceeding the emission standards.

[0003] In summary, a purification system for treating wastewater from fireworks factories is needed to solve the problem that the existing chemical treatment method causes excessive perchlorate residues when treating perchlorate wastewater from fireworks factories. Utility Model Content

[0004] The utility model aims to provide a purification system for treating wastewater from fireworks factories. The specific technical scheme is as follows:

[0005] A purification system for treating wastewater from a fireworks factory, comprising an immersed ultrafilter, a multi-media filter, a precision filter, a primary reverse osmosis filter and a secondary reverse osmosis filter which are sequentially arranged and connected along a water flow purification direction; the water inlet of the immersed ultrafilter is connected to a raw water collection pool storing wastewater from the fireworks factory; a booster pump is arranged on a pipeline between the immersed ultrafilter and the multi-media filter; the water outlet of the secondary reverse osmosis filter is connected to a water production tank.

[0006] Optionally, a hollow fiber membrane having a porous structure is arranged in the submerged ultrafilter.

[0007] Optionally, the pore size of the porous structure of the hollow fiber membrane is less than 0.05 micrometers.

[0008] Optionally, manganese sand filler is filled in the multi-media filter.

[0009] Optionally, a PP cotton filter element is provided in the precision filter; and a drug addition port is provided on the pipeline between the precision filter and the multi-media filter.

[0010] Optionally, a reverse osmosis membrane is provided in both the primary reverse osmosis filter and the secondary reverse osmosis filter.

[0011] Optionally, the purification system further includes an air compressor; an air outlet of the air compressor is connected to the immersed ultrafilter via a pipeline.

[0012] Optionally, the purification system further comprises a backwash water tank; a water inlet of the backwash water tank is connected to the secondary reverse osmosis filter, and a water outlet is connected to the submerged ultrafilter.

[0013] Optionally, the purification system further comprises a first return pipeline, a second return pipeline and a third return pipeline; one end of the first return pipeline is connected to the multi-media filter, and the other end is connected to the raw water collection tank; one end of the second return pipeline is connected to the primary reverse osmosis filter, and the other end is connected to the raw water collection tank; one end of the third return pipeline is connected to the secondary reverse osmosis filter, and the other end is connected to the raw water collection tank;

[0014] The purification system further comprises a collecting pipeline; one end of the collecting pipeline is communicated with the primary reverse osmosis filter, and the other end of the collecting pipeline is communicated with a collecting box.

[0015] Optionally, the purification system further comprises a recycling pipeline; one end of the recycling pipeline is connected to the water production tank, and the other end is connected to the water storage tank;

[0016] Also included is a discharge pipeline, the discharge pipeline being in communication with the water production tank;

[0017] It also includes an installation box, in which the purification system is arranged for sound insulation; ventilation holes are arranged on the installation box for heat dissipation.

[0018] The application of the technical solution of the utility model has at least the following beneficial effects:

[0019] (1) The utility model provides a purification system for treating wastewater from fireworks factories. Under the action of a booster pump, the perchlorate wastewater from the fireworks factory in the raw water collection pool enters the purification system to complete the purification treatment. Specifically, the perchlorate wastewater is purified by an immersion ultrafilter, a multi-media filter, a precision filter, a primary reverse osmosis filter and a secondary reverse osmosis filter in sequence, and can reach the perchlorate concentration of no more than 0.7 mg / L. The problem of excessive perchlorate residues in the treatment of perchlorate wastewater from fireworks factories caused by the existing chemical treatment method is solved. Part of the purified water that meets the standard is connected to the water storage tank in the workshop of the fireworks factory through a reuse pipeline to realize the reuse of purified water, saving water resources for the enterprise and reducing water waste. The excess purified water that meets the standard is discharged through a discharge pipeline. The utility model is easy to operate and can achieve full remote automatic control with the help of an existing control system. The produced water can meet the reuse requirements. The purification system occupies a small area and can be laid out according to the on-site conditions.

[0020] (2) The utility model adopts an immersed ultrafilter, which has low energy consumption and is easy to maintain, and can greatly save subsequent operating costs. The hollow fiber membrane installed therein can be cleaned by an air compressor and a backwash water tank, which is convenient for the recycling of the hollow fiber membrane and the membrane can be replaced every two to three years.

[0021] (3) The utility model adopts a primary reverse osmosis filter and a secondary reverse osmosis filter, which can make the produced water meet the reuse requirements, save water resources, and reduce the operating costs of the enterprise.

[0022] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0024] Figure 1 It is a structural schematic diagram of a purification system for treating wastewater from a fireworks factory according to an embodiment of the utility model (the arrow direction from the air compressor to the submerged ultrafilter in the figure indicates the air flow direction, and the other arrow directions indicate the water flow direction);

[0025] Figure 2 It is a schematic diagram of the main structure of the immersed ultrafilter;

[0026] Figure 3 It is a schematic diagram of the structure of the submerged ultrafilter viewed from above;

[0027] Among them, 1. Immersed ultrafilter, 1.1. Ultrafiltration cylinder, 1.1.1. Liquid level sensor, 1.1.2. Water outlet, 1.1.3. Overflow outlet, 1.1.4. Aeration outlet, 1.1.5. Sewage outlet, 1.1.6. Raw water inlet, 2. Multi-media filter, 3. Precision filter, 4. Primary reverse osmosis filter, 5. Secondary reverse osmosis filter, 6. Water production tank, 7. Air compressor, 8. Backwash water tank, 9. First return pipeline, 10. Second return pipeline, 11. Third return pipeline, 12. Collection pipeline, 13. Reuse pipeline, 14. Discharge pipeline. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0029] Example:

[0030] See also Figure 1 A purification system for treating wastewater from a fireworks factory comprises an immersion ultrafilter 1, a multi-media filter 2 (existing technology, specifically refer to https: / / m.tb.cn / h.g6QpUq4TxJRTCZe?tk=FL9m3aDdXMj), a precision filter 3 (existing technology, specifically refer to https: / / m.tb.cn / h.g6bPpgjfdJ4RBUL?tk=8oz53aDWLOh CZ3458), a primary reverse osmosis filter 4 and a secondary reverse osmosis filter 5 which are sequentially arranged and connected along a water flow purification direction; the water inlet of the immersion ultrafilter 1 is connected to a raw water collection pool containing wastewater from the fireworks factory; a booster pump (specifically a booster water pump, not shown in the figure) is arranged on a pipeline between the immersion ultrafilter 1 and the multi-media filter 2 to boost pressure and realize water flow purification; the water outlet of the secondary reverse osmosis filter 5 is connected to a water production tank 6 to facilitate the collection of purified water.

[0031] A hollow fiber membrane with a porous structure is arranged in the submerged ultrafilter 1. The porous structure of the hollow fiber membrane is evenly arranged, and the pore size is less than 0.05 micrometers, which is convenient for removing microorganisms, colloids, algae and other substances that cause turbidity in the wastewater.

[0032] The multi-media filter 2 is filled with manganese sand to facilitate purification of heavy metal substances in wastewater.

[0033] A PP cotton filter element is provided in the precision filter 3 to improve the filtering accuracy of the wastewater, and to facilitate the protection of the reverse osmosis membrane in the primary reverse osmosis filter 4 and the secondary reverse osmosis filter 5 during the subsequent wastewater purification. A dosing port (not shown in the figure) is provided on the pipeline between the precision filter 3 and the multi-media filter 2 for adding a scale inhibitor, reducing the contamination of the reverse osmosis membrane, keeping the surface of the reverse osmosis membrane clean, and extending the service life of the reverse osmosis membrane.

[0034] Reverse osmosis membranes are provided in both the primary reverse osmosis filter 4 and the secondary reverse osmosis filter 5 to effectively remove perchlorate, heavy metal ions, organic matter, colloids, bacteria and viruses, etc. Wherein, both the primary reverse osmosis filter 4 and the secondary reverse osmosis filter 5 are conventional reverse osmosis filters with built-in reverse osmosis membranes.

[0035] The purification system also includes an air compressor 7; the air outlet of the air compressor 7 is connected to the immersed ultrafilter 1 through a pipeline, so that the dirt attached to the surface of the hollow fiber membrane can be shaken off by air washing, and the surface dirt of the hollow fiber membrane can be washed with purified water in the backwash water tank 8, so as to purify the hollow fiber membrane and facilitate the recycling of the hollow fiber membrane.

[0036] The purification system also includes a backwash water tank 8; the water inlet of the backwash water tank 8 is connected to the secondary reverse osmosis filter 5, and the water outlet is connected to the immersed ultrafilter 1, so that the surface dirt of the hollow fiber membrane can be washed away by the purified water of the backwash water tank 8, so as to purify the hollow fiber membrane, facilitate the recycling of the hollow fiber membrane, and also reduce the maintenance cost.

[0037] The purification system further includes a first return pipeline 9, a second return pipeline 10 and a third return pipeline 11; one end of the first return pipeline 9 is connected to the multi-media filter 2, and the other end is connected to the raw water collection tank, so that the backwash water generated by the backwashing of the multi-media filter 2 can be returned to the raw water collection tank, and then the raw water collection tank enters the purification system under the action of the booster pump to complete the purification treatment; one end of the second return pipeline 10 is connected to the primary reverse osmosis filter 4, and the other end is connected to the raw water collection tank, so that the wastewater that does not meet the standards after purification by the primary reverse osmosis filter 4 can be returned to the raw water collection tank, and then the raw water collection tank enters the purification system under the action of the booster pump to complete the purification treatment; one end of the third return pipeline 11 is connected to the secondary reverse osmosis filter 5, and the other end is connected to the raw water collection tank, so that the wastewater that does not meet the standards after purification by the secondary reverse osmosis filter 5 can be returned to the raw water collection tank, and then the raw water collection tank enters the purification system under the action of the booster pump to complete the purification treatment.

[0038] The purification system further comprises a collecting pipeline 12; one end of the collecting pipeline 12 is connected to the primary reverse osmosis filter 4, and the other end is connected to a collecting box, for collecting concentrated perchlorate concentrated water for centralized purification treatment.

[0039] The purification system also includes a recycling pipeline 13; one end of the recycling pipeline 13 is connected to the water production tank 6, and the other end is connected to the water storage tank of the fireworks factory workshop to realize the recycling of purified water. In addition, if the purification system purifies too much water, it is connected to the water production tank 6 through the discharge pipeline 14 to discharge the excess water.

[0040] The purification system further comprises an installation box (not shown in the figure), and the purification system is arranged in the installation box for sound insulation; ventilation holes are arranged on the installation box for heat dissipation.

[0041] The operation process of the purification system is as follows:

[0042] Under the action of the booster pump, the perchlorate wastewater from the fireworks factory in the raw water collection pool enters the purification system to complete the purification treatment; specifically, the perchlorate wastewater is purified in turn by the immersed ultrafilter 1, the multi-media filter 2, the precision filter 3, the primary reverse osmosis filter 4 and the secondary reverse osmosis filter 5, and can meet the discharge standard of perchlorate concentration not higher than 0.7 mg / L; among them, part of the purified water that meets the standard is connected to the water storage tank in the workshop of the fireworks factory through the reuse pipeline 13, so as to realize the reuse of purified water, save water resources for the enterprise and reduce water waste; the excess purified water that meets the standard is discharged through the discharge pipeline 14.

[0043] In this embodiment, the structure of the submerged ultrafilter 1 is shown in Figure 2 and Figure 3 The submerged ultrafilter 1 comprises an ultrafiltration cylinder 1.1, in which a hollow fiber membrane having a porous structure and a liquid level sensor 1.1.1 are arranged; if the liquid level in the ultrafiltration cylinder 1.1 monitored by the liquid level sensor 1.1.1 is lower than the lower limit value, the submerged ultrafilter 1 stops running; a water inlet (referred to as the raw water inlet 1.1.6), a water outlet 1.1.2, and an overflow outlet 1.1.3 are arranged on the ultrafiltration cylinder 1.1. .3, the aeration port 1.1.4 and the sewage outlet 1.1.5, the water inlet of which is connected to the raw water collection tank storing the wastewater from the fireworks factory, the water outlet 1.1.2 is connected to the multi-media filter 2 through a pipeline, the overflow port 1.1.3 is connected to the raw water collection tank storing the wastewater from the fireworks factory, the aeration port 1.1.4 is connected to the air outlet of the air compressor 7 through a pipeline, and the sewage outlet 1.1.5 is provided with a pneumatic butterfly valve for easy sewage discharge.

[0044] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A purification system for treating wastewater from a fireworks factory, characterized in that: It comprises an immersed ultrafilter (1), a multi-media filter (2), a precision filter (3), a primary reverse osmosis filter (4) and a secondary reverse osmosis filter (5) which are sequentially arranged and connected along the water purification direction; the water inlet of the immersed ultrafilter (1) is connected to a raw water collection pool storing wastewater from a fireworks factory; a booster pump is arranged on the pipeline between the immersed ultrafilter (1) and the multi-media filter (2); the water outlet of the secondary reverse osmosis filter (5) is connected to a water production tank (6).

2. The purification system for treating wastewater from fireworks factories according to claim 1, characterized in that: A hollow fiber membrane having a porous structure is arranged in the submerged ultrafilter (1).

3. The purification system for treating wastewater from fireworks factories according to claim 2, characterized in that: The pore size of the porous structure of the hollow fiber membrane is less than 0.05 micrometers.

4. The purification system for treating wastewater from a fireworks factory according to claim 1, characterized in that: The multi-media filter (2) is filled with manganese sand filler.

5. The purification system for treating wastewater from fireworks factories according to claim 1, characterized in that: A PP cotton filter element is arranged in the precision filter (3); and a drug addition port is arranged on the pipeline between the precision filter (3) and the multi-media filter (2).

6. The purification system for treating wastewater from fireworks factories according to claim 1, characterized in that: Reverse osmosis membranes are provided in both the primary reverse osmosis filter (4) and the secondary reverse osmosis filter (5).

7. The purification system for treating wastewater from a fireworks factory according to any one of claims 1 to 6, characterized in that: It also includes an air compressor (7); the air outlet of the air compressor (7) is connected to the submerged ultrafilter (1) through a pipeline.

8. The purification system for treating wastewater from fireworks factories according to claim 7, characterized in that: It also comprises a backwash water tank (8); the water inlet of the backwash water tank (8) is connected to the secondary reverse osmosis filter (5), and the water outlet is connected to the submerged ultrafilter (1).

9. The purification system for treating wastewater from a fireworks factory according to claim 7, characterized in that: It also includes a first return pipeline (9), a second return pipeline (10) and a third return pipeline (11); one end of the first return pipeline (9) is connected to the multi-media filter (2), and the other end is connected to the raw water collection tank; one end of the second return pipeline (10) is connected to the primary reverse osmosis filter (4), and the other end is connected to the raw water collection tank; one end of the third return pipeline (11) is connected to the secondary reverse osmosis filter (5), and the other end is connected to the raw water collection tank; The purification system further comprises a collecting pipeline (12); one end of the collecting pipeline (12) is connected to the primary reverse osmosis filter (4), and the other end is connected to a collecting box.

10. The purification system for treating wastewater from fireworks factories according to claim 7, characterized in that: It also includes a recycling pipeline (13); one end of the recycling pipeline (13) is connected to the water production tank (6), and the other end is connected to the water storage tank; It also includes a discharge pipeline (14), wherein the discharge pipeline (14) is connected to the water production tank (6); It also includes an installation box, in which the purification system is arranged; and ventilation holes are arranged on the installation box.

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