CN111333223A

CN111333223A - Sewage treatment method

Info

Publication number: CN111333223A
Application number: CN202010179153.2A
Authority: CN
Inventors: 盛醒
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-16
Filing date: 2020-03-16
Publication date: 2020-06-26

Abstract

The invention provides a sewage treatment method, which is characterized by comprising the following steps of: a. and (3) precipitation: directly introducing the generated sewage into a sedimentation tank, standing for 9-10h to obtain supernatant and sludge to be treated, and separating the supernatant from the sludge to be treated; b. coagulation: introducing the separated supernatant into a coagulation tank, adding a coagulant, and stirring for coagulation reaction; c. and (3) filtering: b, introducing the water treated in the step b into a filtering tank, and sequentially passing through a coarse filtering net, a fine filtering net and a nano filtering net to obtain clear liquid; d. and (3) disinfection: and c, introducing the clear liquid obtained in the step c into a disinfection tank, and enabling the clear liquid to reach the standard of the discharged water after being disinfected by the disinfection tank.

Description

Sewage treatment method

Technical Field

The invention belongs to the technical field of sewage treatment, and relates to a sewage treatment method.

Background

With the industrial progress and social development, water pollution also becomes more and more serious, and the problem of environmental management of the first place is solved. The sewage is purified to reach the water quality requirement of being discharged into a certain water body or being reused. Sewage treatment is widely applied to various fields such as buildings, agriculture, traffic, energy, petrifaction, environmental protection, urban landscape, medical treatment, catering and the like, and is increasingly used in daily life of common people. The water pollution situation is continuously intensified, so that the sewage treatment and regeneration industry is concerned by the unprecedented. The water shortage of China is more and more serious, the water pollution affects industrial production, increases equipment corrosion, affects product quality, even prevents production from going down, the water pollution affects people's life, destroys ecology, directly harms people's health and causes great damage. Therefore, the sewage purifying chamber is reasonable, efficient and thorough.

Through retrieval, for example, chinese patent document discloses a sewage treatment method [ application No.: 201811047611.6, respectively; publication No.: CN109019784A ]. The sewage treatment method is characterized by comprising the following steps: introducing the ozone micro-nano bubbles into the sewage and arranging the activated carbon ceramic composite material loaded with the catalyst in the sewage.

Although the sewage treatment method disclosed in this patent can rapidly decompose organic substances in water to achieve the purpose of discoloration and reduction of COD, the sewage treatment method is not thorough and is prone to secondary pollution, and therefore, it is necessary to design a sewage treatment method.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a sewage treatment method which has the characteristics of high efficiency, thoroughness and no secondary pollution.

The purpose of the invention can be realized by the following technical scheme: a sewage treatment method is characterized by comprising the following steps:

a. and (3) precipitation: directly introducing the generated sewage into a sedimentation tank, standing for 9-10h to obtain supernatant and sludge to be treated, and separating the supernatant from the sludge to be treated;

b. coagulation: introducing the separated supernatant into a coagulation tank, adding a coagulant, and stirring for coagulation reaction;

c. and (3) filtering: b, introducing the water treated in the step b into a filtering tank, and sequentially passing through a coarse filtering net, a fine filtering net and a nano filtering net to obtain clear liquid;

d. and (3) disinfection: and c, introducing the clear liquid obtained in the step c into a disinfection tank, and enabling the clear liquid to reach the standard of the discharged water after being disinfected by the disinfection tank.

The time for which the precipitation is stationary in step a is preferably 10 h.

The coagulant in the step b comprises the following components in parts by mass: 32-52 parts of maleic acid-acrylic acid copolymer, 17-25 parts of ferric chloride, 10-20 parts of polymeric ferric sulfate, 12-20 parts of polyacrylamide, 7-10 parts of ferrous sulfate, 12-22 parts of polysilicate aluminum sulfate, 5-9 parts of diatomite, 10-13 parts of vanadium pentoxide and 4-8 parts of bamboo charcoal powder.

The disinfectant in the step d is bleaching powder.

The coagulating basin includes the cell body, be provided with the lifter plate on the cell body, the lifter plate links to each other with a removal structure that can drive it and reciprocate, removal structure includes the mounting bar, the guide arm, the guide pin bushing, a driving motor, gear and rack, the mounting bar is fixed on the cell body, the guide arm is vertical to be fixed on the mounting bar, the guide pin bushing sets up on the guide arm, the rack is vertical to be fixed on the mounting bar, and the rack is parallel to each other with the guide arm, a driving motor fixes on the guide pin bushing, a driving motor's output shaft level sets up, the gear is fixed at a driving motor's output shaft tip, and the gear meshes with the rack mutually, the lifter plate passes through connecting rod and guide pin bushing and links to each other.

The utility model discloses a lifting plate, including the lifting plate, the supporting rod of (mixing) shaft, the (mixing) shaft is connected with the (mixing) shaft, the supporting rod of setting on the lifting plate is set up including two symmetries to the complementary unit, rotates between two bracing pieces to be connected with the pivot, and the one end of pivot runs through the bracing piece and the transmission is connected with second driving motor, fixedly connected with auxiliary cylinder in the pivot, and the swivelling joint has the (mixing) shaft in the auxiliary cylinder, and the one end of (mixing) shaft runs through.

The auxiliary cylinder is far away from one end of the third driving motor and is fixedly connected with a cylinder, and a slot matched with the output end of the cylinder is formed in the lifting plate.

The rotating shaft is sleeved with two bearings which are symmetrically arranged, and the side wall of the lower end of each bearing is fixedly connected with the lifting plate through a connecting rod.

The two side walls of the first stirring piece are fixedly connected with stirring blocks, and one end, far away from the first stirring piece, of each stirring block is integrally formed with a conical head.

The auxiliary cylinder is of a double-spherical structure.

The slot is connected with a buffer plate in a sliding mode, and the buffer plate is fixedly connected with the inner wall of the slot through a damping spring.

And a plurality of second stirring sheets are fixed outside the auxiliary cylinder.

Through the up-and-down movement of the lifting plate, the sewage in the tank body and the finished coagulant can be fully stirred while the coagulant is prepared, so that the first stirring sheet and the second stirring sheet can be fully utilized to realize the functions of batching and treating, and the using effect is good.

Through setting up rotatable auxiliary tank, can be at auxiliary tank pivoted in-process, make the coagulant raw materials in the auxiliary tank can better diffusion, make the mixing that can be better between the coagulant raw materials, the layering phenomenon avoids appearing, the stirring of deuterogamy stirring piece one, improvement coagulant raw materials stirring efficiency that can be very big, and the two spherical structure of auxiliary tank, the curved surface that can utilize spherical structure makes the diffusion that the coagulant raw materials can be better at the in-process of upset mix, stirring efficiency has further been improved.

Through the cooperation of the cylinder that sets up and slot, can rotate the back at the auxiliary cylinder, utilize the output of cylinder and the grafting of slot, firm cylinder does benefit to a pair of coagulant raw materials of stirring piece and stirs the operation, and buffer board and damping spring's cooperation, can cushion the protection to the cylinder, prevents that the output of cylinder from receiving from producing deformation excessively greatly.

The setting of stirring piece can improve the intensity of equipment stirring, and the design of the one end cone of stirring piece, and the breaking coagulant raw materials that can be better makes stirring of stirring piece one more smooth and easy, avoids the too big stirring that influences stirring piece one of coagulant raw materials resistance.

Compared with the prior art, the sewage treatment method has the following advantages:

the process flow for treating the sewage through the steps of precipitation, coagulation, filtration and disinfection is simpler, but the sewage can be efficiently treated to reach the discharge standard, so that the natural environment of people is protected; precipitation can save production cost and obtain supernatant liquid quickly, coagulation is safe, non-toxic, environment-friendly and pollution-free, can be reacted with pollutants efficiently, filtering is carried out for 3 times, discharge of harmful substances in tiny particles is facilitated through a nano filter screen, and finally bleaching powder is added into a disinfection tank and is prepared through reaction of chlorine and calcium hydroxide, so that the disinfection tank has a strong sterilization effect.

Drawings

FIG. 1 is a schematic view of the steps of the present process.

FIG. 2 is a schematic plan view of the coagulation tank.

FIG. 3 is a schematic plan view of a portion of a coagulation basin removed.

FIG. 4 is a schematic plan view of the first stirring blade in the coagulation basin.

Fig. 5 is an enlarged schematic view of a structure at a in fig. 3.

In the figure, 1, a lifting plate; 2. a support bar; 3. a rotating shaft; 4. a second drive motor; 5. An auxiliary cylinder; 6. a stirring shaft; 7. a third drive motor; 8. stirring a first stirring sheet; 9. a slot; 10. a bearing; 11. stirring blocks; 12. a buffer plate; 13. a damping spring; 14. a cylinder; 15. a connecting rod; 16. a tank body; 17. a rack; 18. a gear; 19. a first drive motor; 20. a guide sleeve; 21. a guide bar; 22. a connecting rod; 23. a second stirring sheet; 24. and (7) mounting the bar.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1-5, the sewage treatment method is realized by the following steps:

The time for standing the precipitate in the step a is 10h optimal;

the coagulant in the step b comprises the following components in parts by mass: 32-52 parts of maleic acid-acrylic acid copolymer, 17-25 parts of ferric chloride, 10-20 parts of polymeric ferric sulfate, 12-20 parts of polyacrylamide, 7-10 parts of ferrous sulfate, 12-22 parts of polysilicate aluminum sulfate, 5-9 parts of diatomite, 10-13 parts of vanadium pentoxide and 4-8 parts of bamboo charcoal powder; in this embodiment, the mass parts of the coagulant are as follows: 42 parts of maleic acid-acrylic acid copolymer, 21 parts of ferric chloride, 15 parts of polymeric ferric sulfate, 16 parts of polyacrylamide, 8 parts of ferrous sulfate, 17 parts of polyaluminum silicate sulfate, 7 parts of diatomite, 9 parts of vanadium pentoxide and 6 parts of bamboo charcoal powder.

The disinfectant in step d is bleaching powder.

The coagulation tank comprises a tank body 16, a lifting plate is arranged on the tank body 16, the lifting plate is connected with a moving structure capable of driving the lifting plate to move up and down, the moving structure comprises a mounting bar 24, a guide rod 21, a guide sleeve 20, a first driving motor 19, a gear 18 and a rack 17, the mounting bar 24 is fixed on the tank body 16, the guide rod 21 is vertically fixed on the mounting bar 24, the guide sleeve 20 is arranged on the guide rod 21, the rack 17 is vertically fixed on the mounting bar 24, the rack 17 is parallel to the guide rod 21, the first driving motor 19 is fixed on the guide sleeve 20, an output shaft of the first driving motor 19 is horizontally arranged, the gear 18 is fixed at the end part of the output shaft of the first driving motor 19, the gear 18 is meshed with the rack 17, the lifting plate is connected with the guide sleeve 20 through a connecting rod.

The auxiliary mechanism comprises two symmetrical supporting rods 2 arranged on the lifting plate 1, a rotating shaft 3 is connected between the two supporting rods 2 in a rotating mode, one end of the rotating shaft 3 penetrates through the supporting rods 2 and is connected with a second driving motor 4 in a transmission mode, the type of the second driving motor 4 is YE2-280M-4, two bearings 10 symmetrically arranged are sleeved on the rotating shaft 3, the side wall of the lower end of each bearing 10 is fixedly connected with the lifting plate 1 through a connecting rod 15, the rotating shaft 3 can rotate more smoothly due to the arrangement of the bearings 10, a certain supporting force is provided for the rotating shaft 3 under the action of the connecting rod 15, and the rotating shaft 3 is prevented from being stressed and deformed.

The rotating shaft 3 is fixedly connected with an auxiliary tank 5, the auxiliary tank 5 is of a double-spherical structure, the double-spherical structure design of the auxiliary tank 5 is convenient for the raw materials of the coagulant to be diffused and mixed in the overturning process, the first stirring blade 8 can stir the feed more fully, the auxiliary cylinder 5 is connected with a stirring shaft 6 in a rotating way, one end of the stirring shaft 6 penetrates through the inner wall of the auxiliary cylinder 5 and is connected with a third driving motor 7 in a transmission way, the model of the third driving motor 7 is YE2-160M-4, the stirring shaft 6 is fixedly connected with a plurality of stirring pieces I8, the side walls of the two sides of each stirring piece I8 are fixedly connected with stirring blocks 11, and the one end integrated into one piece that stirring piece 8 was kept away from to stirring piece 11 has the cone, and stirring piece 11 can further strengthen the intensity of stirring, and the cone design of stirring piece 11 is convenient for break stopping of coagulant raw materials, makes the stirring of stirring piece 8 more smooth and easy.

One end fixedly connected with cylinder 14 that third driving motor 7 was kept away from to auxiliary cylinder 5, and set up on lifter plate 1 with 14 output assorted slots 9 of cylinder, cylinder 14 and slot 9's cooperation, be convenient for stabilize auxiliary cylinder 5, be convenient for stir going on of operation, sliding connection has buffer board 12 in the slot 9, and buffer board 12 passes through damping spring 13 and slot 9's inner wall fixed connection, buffer board 12 and damping spring 13's cooperation is convenient for play the buffering guard action to cylinder 14, avoid cylinder 14's output to receive the too big emergence of pressure and deform.

A plurality of second stirring blades 23 are fixed outside the auxiliary cylinder 5, and in the embodiment, the number of the second stirring blades 23 is twelve.

By adopting the structure, prepared coagulant raw materials are put into the auxiliary tank 5 through the feed inlet of the auxiliary tank 5, the second driving motor 4 is started, the second driving motor 4 can drive the rotating shaft 3 to rotate, and then the rotating shaft 3 drives the auxiliary tank 5 to rotate, the rotating speed of the second driving motor 4 can be regulated and controlled, so that the auxiliary tank 5 rotates at the most proper rotating speed, in the rotating process, the coagulant raw materials in the auxiliary tank 5 can be overturned and diffused, the diffusion degree is enhanced through the curvature of the auxiliary tank 5, so that the coagulant raw materials are mixed with each other, after rotating for a period of time, one end of the auxiliary tank 5 fixedly connected with the air cylinder 14 is aligned with the slot 9, the second driving motor 4 can be closed, the auxiliary tank 5 is stabilized through the insertion connection of the output end of the air cylinder 14 and the slot 9, the third driving motor 7 is started, the stirring shaft 6 is driven to rotate, the stirring shaft 6, the first stirring sheet 8 can drive the stirring block 11 to further mix the mixed coagulant raw materials, so that the mixing sufficiency is improved, the third driving motor 7 can be turned off after the mixing is sufficient, the coagulant raw materials can be mixed more sufficiently, the manpower waste is avoided, the stirring efficiency is improved, and in the process, the second stirring sheet 23 can stir the sewage in the tank body 16; meanwhile, through the up-and-down movement of the lifting plate 1, the sewage and finished coagulant in the tank body 16 can be fully stirred while the coagulant is prepared, so that the first stirring sheet 8 and the second stirring sheet 23 can be fully utilized to realize the functions of batching and treating, and the using effect is good.

The above components are all standard components or components known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through technical manuals or through routine experiments.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A sewage treatment method is characterized by comprising the following steps:

2. The wastewater treatment method according to claim 1, wherein the settling time in step a is 10h optimal.

3. The sewage treatment method according to claim 1, wherein the coagulant in the step b comprises, in parts by mass: 32-52 parts of maleic acid-acrylic acid copolymer, 17-25 parts of ferric chloride, 10-20 parts of polymeric ferric sulfate, 12-20 parts of polyacrylamide, 7-10 parts of ferrous sulfate, 12-22 parts of polysilicate aluminum sulfate, 5-9 parts of diatomite, 10-13 parts of vanadium pentoxide and 4-8 parts of bamboo charcoal powder.

4. The wastewater treatment method according to claim 1, wherein the disinfectant in step d is bleaching powder.

5. The sewage treatment method according to claim 5, wherein the coagulation tank comprises a tank body, a lifting plate is arranged on the tank body, the lifting plate is connected with a moving structure capable of driving the lifting plate to move up and down, the moving structure comprises a mounting bar, a guide rod, a guide sleeve, a first driving motor, a gear and a rack, the mounting bar is fixed on the tank body, the guide rod is vertically fixed on the mounting bar, the guide sleeve is arranged on the guide rod, the rack is vertically fixed on the mounting bar, the rack is parallel to the guide rod, the first driving motor is fixed on the guide sleeve, an output shaft of the first driving motor is horizontally arranged, the gear is fixed at the end of the output shaft of the first driving motor, the gear is meshed with the rack, the lifting plate is connected with the guide sleeve through a connecting rod, and an auxiliary mechanism is arranged.