CN115520956A - A denitrification device for urban domestic sewage and a denitrification method thereof - Google Patents

Abstract

The invention discloses a denitrification device for urban domestic sewage and a denitrification method thereof, wherein the device comprises an installation rack, at least one group of reaction barrels symmetrically installed on the installation rack, a connecting pipe used for connecting the reaction barrels, a cleaning mechanism arranged on the installation rack and positioned in the reaction barrels in part of area, and an alkaline substance adding mechanism symmetrically installed on the installation rack; the cleaning mechanism is used for cleaning precipitates on the inner wall of the reaction barrel; the alkaline substance adding mechanism is used for adding alkaline solution with a set dose into the reaction barrel through a dosing port arranged on the reaction barrel; this device can be real-timely monitors the solution temperature in the sleeve pipe through thermodetector, and then can in time adjust the temperature of solution, wherein heats the sleeve pipe through placing the bath lotion in being responsible for, has avoided the heating pipe to make the temperature of the alkaline solution in the sleeve pipe too high, and has avoided alkaline solution to be in the boiling state, and then has avoided spilling over of solution.

Description

A denitrification device for urban domestic sewage and a denitrification method thereof

technical field

The invention relates to a denitrification device for domestic sewage, in particular to a denitrification device for urban domestic sewage, and relates to the technical field of denitrification of sewage.

Background technique

A large amount of nitrogen discharge will cause eutrophication of the water body, so ammonia nitrogen is used as one of the important assessment indicators for evaluating the treatment effect of sewage treatment plants in my country. At present, sewage treatment is mainly based on biological denitrification. The principle of denitrification is to convert nitrogen in sewage into harmless nitrogen through aerobic nitrification and anoxic denitrification.

However, there are still some problems in the existing sewage denitrification. In order to remove the nitrogen in the sewage, the sewage needs to undergo aerobic nitrification first, and then anoxic denitrification to convert the nitrogen in the water into The gas is discharged, but in the actual operation process, the local water quality is soft or the pH value of the sewage is reduced during the nitrification reaction, and the reduced pH value will lead to a reduction in the rate of the nitrification reaction, and then when the pH value is around 6, nitrification The reaction stops, which in turn will affect the efficiency of sewage denitrification.

In order to solve the above problems, in the process of denitrification, some enterprises will put alkaline solution into the sewage reaction container, and then increase the pH value in the sewage, so as to avoid the cessation of nitrification reaction caused by the low pH value. During the selection process, sodium hydroxide is usually selected as the solute of the alkaline solution, and then the addition of the alkaline solution is completed. Since sodium hydroxide is a strong base, if it is added in excess, the pH will rise significantly. During the delivery process, it is necessary to add a small amount of time, and in the process of transportation to addition, the temperature of the 50% sodium hydroxide solution will drop, which in turn will cause the sodium hydroxide to crystallize and precipitate out of the solution, resulting in crystallization Sodium hydroxide is difficult to dissolve again, which leads to fouling in the alkaline solution container or sewage reaction container.

Therefore, how to reduce the precipitation of sodium hydroxide crystals from solution is a problem to be solved at present.

Contents of the invention

Purpose of the invention: to provide a denitrification device for urban domestic sewage to solve the above-mentioned problems in the prior art.

Technical solution: a denitrification device for urban domestic sewage, including:

Mounting frame, at least one group of reaction barrels symmetrically installed on the mounting frame, connecting pipes used to connect the reaction barrels, a cleaning mechanism arranged on the mounting frame and partially located in the reaction barrels, symmetrically installed Alkali addition mechanism on the mounting frame;

The cleaning mechanism is used to clean the sediment on the inner wall of the reaction barrel;

The alkaline substance adding mechanism injects a predetermined dose of alkaline solution into the reaction barrel through the dosing port provided on the reaction barrel;

The solute of the alkaline solution is sodium hydroxide.

In a further embodiment, the cleaning mechanism includes a rotating motor installed on the mounting bracket, a rotating shaft provided at the output end of the rotating motor, and a connecting piece sleeved on the rotating shaft, uniformly arranged on the At least three first connecting rods in the circumferential direction of the connecting member, a second connecting rod connected to the other end of the first connecting rod, and a connecting ring for connecting the other end of the second connecting rod;

The plane where the first connecting rod is located is parallel to the bottom of the reaction barrel, and the length direction of the second connecting rod is parallel to the axial direction of the rotation shaft; through the provided cleaning structure, the fouling in the reaction barrel can be cleaned, Thereby ensuring the cleanliness of the inside of the reaction barrel.

In a further embodiment; both the first connecting rod and the second connecting rod are provided with a linear motion mechanism, and a cleaning part connected with the linear motion mechanism;

The cleaning part includes a hinged seat connected to the linear motion mechanism, a clearing plate arranged on the hinged seat and having a predetermined angle with the hinged seat, and a cleaning plate for connecting the clearing plate and the hinged seat the bolt;

At least in the working state, the cleaning plate on the first connecting rod is in contact with the bottom of the reaction tank, and the cleaning plate on the second connecting rod is in contact with the side wall of the reaction tank, and driven by the rotating motor, the cleaning of the reaction tank is completed. Cleaning of inner walls;

Both the linear motion mechanism and the injection device are in the prior art; the cleaning area can be adjusted, and then different positions in the reaction barrel can be cleaned.

In a further embodiment, the alkaline substance adding mechanism includes a drive motor connected to the mounting frame, a rotating disk arranged at the output end of the driving motor, at least four heating components arranged on the rotating disk, The stirring assembly connected with the heating assembly, and the sealing assembly connected with the rotating disk; adjust the pH value in the sewage to ensure the smooth progress of the nitrification reaction.

In a further embodiment, the heating assembly includes a main pipe, a power supply unit provided on the main pipe, a heating tube connected to the power supply unit, a sleeve provided in the main pipe, and a The sealing ring between the inner wall of the main pipe and the outer wall of the casing;

There is a gap of a predetermined distance between the casing and the main pipe;

A sealed filling area is formed between the main pipe, the casing and the sealing ring, and the filling area is filled with bath liquid, and the bath liquid wraps the heating pipe;

Wherein the heating tube is helical and sleeved on the casing; the diameter of the casing is smaller than the diameter of the injection port;

The bath liquid has the function of heat conduction, and then when the heating tube is energized, the temperature of the bath liquid will increase, and then the casing can be heated to increase the temperature in the casing; the temperature detector is a prior art; Bath heating can not only ensure that the solution in the casing is heated evenly, but also avoid direct contact between the heating tube and the sodium hydroxide solution, thereby avoiding damage to the heating tube and ensuring the smooth addition of the alkaline solution.

In a further embodiment, the stirring assembly includes a stirring motor arranged in the casing, a rotating shaft connected to the output end of the stirring motor, a stirring blade arranged on the rotating shaft, and a stirring blade arranged in the casing a dividing plate inside the tube, and a plurality of temperature detectors arranged on the dividing plate;

The partition plate divides the casing into two placement areas, wherein the placement area near the bottom of the casing is used to place the stirring motor, and the other placement area is used to place the stirring blade, the rotating shaft passes through the partition plate, and the space between the two There is a sealing ring between;

Stirring blades are used to stir the alkaline solution in the casing;

The temperature detector is used to measure the temperature of the alkali solution in the casing;

The rotation, stirring blades and partition plates are all plastic products, which do not react with alkaline substances; during the heating process, the alkaline solution can be stirred, thereby ensuring that the solution in the casing can be heated evenly, thereby ensuring that the casing The solution in can be stable within the established range.

In a further embodiment, the sealing assembly includes two supporting frames arranged on the rotating disk, an adjusting motor arranged on one of the supporting frames, a transmission shaft arranged at the output end of the adjusting motor, and sleeved on the The rotating part of the transmission shaft, the sealing plate connected with the rotating part, the magnetic part arranged on the sealing plate, and the electromagnetic equipment installed on another supporting frame are symmetrically installed on both sides of the electromagnetic equipment, And a set of limit seats on the support frame, and elastic protruding ends arranged on the limit seats;

The sealing plate is also provided with a sealing gasket;

At least in the working state, under the driving of the adjusting motor, the sealing gasket is in contact with the casing, and then the magnetic part is absorbed by the electromagnetic equipment, and the elastic protruding end is in contact with the magnetic part to complete the alkaline solution in the casing. Sealing; to ensure the sealing of the solution in the casing, to avoid splashing of the solution.

In a further embodiment, the sealing plate is also provided with a limit tube, a limit block located in the limit tube, connected with the limit block, and connected with a limit spring in the limit tube, and A limit ball connected to the other end of the limit spring;

The support frame is also provided with a limit hole, and a preset slide rail preset on the support frame, and the limit ball can move in the preset slide rail

The limiting spring is in a compressed state; during the injection process, the overflow of the solution is avoided, thereby ensuring the smooth progress of the solution adding work.

In a further embodiment, a guide shaft is provided on the sealing plate, and a guide wheel is provided at one end of the guide shaft;

Wherein the guide wheel is axially provided with a limit groove, the support frame is provided with a limit chute, and the limit groove is adapted to the limit slide rail;

The support frame is also provided with a raised portion and a recessed portion;

At least during the sealing process, the guide wheels pass through the protrusions and depressions on the support frame in turn, and in the sealed state, the guide wheels are located at the depressions; it is ensured that the sealing plate can seal the nozzle of the casing, so that the The sealing gasket can cover the nozzle of the casing, thereby preventing the solution in the casing from splashing.

A denitrification method based on the above-mentioned denitrification device for urban domestic sewage, comprising the steps of:

S1: When it is necessary to denitrify the domestic wastewater in the city, the operator first injects the domestic wastewater into the reaction tank through the water inlet in the reaction tank, and then puts chemicals into the reaction tank, so that nitrification occurs in the reaction tank reaction, but during this process, the pH value of the wastewater gradually decreases, thereby reducing the rate of nitrification reaction, so the operator needs to add alkaline substances to the reaction tank;

S2: When it is necessary to add alkaline substances to the reaction barrel, the alkaline solution is first injected into the sleeve through the injection device, and then the temperature detector located in the sleeve can monitor the temperature of the alkaline solution located in the sleeve. When the temperature is lower than 12.8°C, the power supply unit will supply power to the heating tube, and the heating tube will generate more heat, and the heating tube will increase the temperature of the bath liquid, and the bath liquid will The alkaline solution in the casing is heated, and then the stirring motor also starts to work, which can drive the rotating shaft to rotate, and then the moving rotating shaft can drive the stirring blades to rotate, and then the alkaline solution can be stirred. The rise of the casing temperature completes the heating of the alkaline bath in the casing;

S3: After the heating of the alkaline solution in the casing is completed, the regulating motor starts to work at this time, and then the moving regulating motor can drive the transmission shaft to start rotating, and the moving transmission shaft can drive the rotating parts to start rotating, and then move The rotating part can drive the sealing plate to start moving, and then make the sealing gasket on the sealing plate abut against the nozzle of the casing. At this time, the magnetic part can be located between the two limit seats, and the two elastic protrusions are in contact with the surface of the magnetic part. Butting, and then the electromagnetic equipment starts to work, and then it can absorb the magnetic parts between the two limit seats, and then complete the sealing of the casing;

S4: After the sealing of the casing is completed, the driving motor starts to work at this time, and then the moving driving motor can drive the rotating disk to start rotating, and then the casing containing the alkaline solution starts to rotate, and then the injection device can inject Alkaline solution is injected into the casing, and the casing filled with alkaline solution can move to the top of the injection port on the reaction barrel, then the electromagnetic equipment stops working, and then the regulating motor starts to work. The movement process is the same as above, but the sealing plate The direction of movement is opposite to the above, so that all the alkaline solution can be injected into the reaction barrel. During this process, the injection device can inject the alkaline solution into the sleeve at the opposite position, and then the sewage after the nitrification reaction is completed is discharged from the connecting pipe. ;

S5: After the reaction barrel has been used for a predetermined period of time, first empty the sewage in the reaction barrel, and then the operator can install the cleaning mechanism on the mounting frame, and then make the output end of the cleaning mechanism in the reaction barrel, and then turn the motor to start working , and then the moving rotating motor can drive the rotating shaft to start moving, and then the moving rotating shaft can drive the connecting piece to start moving, and then the moving connecting piece can drive the first connecting rod to start moving, and then the moving first connecting rod can drive the second connecting rod to move. The connecting rod starts to move, and during the rotation of the first connecting rod and the second connecting rod, the cleaning plate positioned on the first connecting rod can clean the dirt on the bottom of the reaction barrel, while the cleaning plate positioned on the second connecting rod can Clean the dirt on the wall of the reaction barrel, and then, driven by the linear motion mechanism, the cleaning plate can move in the length direction of the respective connecting rods, and then the cleaning of the reaction barrel can be completed;

S6: After the above cleaning work is completed, repeat the above steps S1~S4 at this time, so that the sewage after the nitrification reaction can flow out from the connecting pipe, and then complete the preliminary denitrification and purification of the sewage.

Beneficial effects: the invention discloses a denitrification device for urban domestic sewage. In order to reduce the precipitation of sodium hydroxide crystals from the solution, the device is equipped with a heating component. After the alkaline solution is located in the casing, the When the power supply unit supplies power to the heating tube, the heating tube will generate more heat, and the heating tube will increase the temperature of the bath liquid, and then the bath liquid will heat the alkaline solution in the casing, and then the stirring motor will It also starts to work, and then it can drive the rotating shaft to rotate, and then the moving rotating shaft can drive the stirring blade to rotate, and then it can stir the alkaline solution. With the increase of the casing temperature, the alkali in the casing is completed. The temperature of the solution in the casing can be monitored in real time through the temperature detector, and the temperature of the solution can be adjusted in time. The casing is heated by the bath liquid placed in the main tube to avoid The heating tube is used to make the temperature of the alkaline solution in the casing too high, so as to avoid the boiling of the alkaline solution, thereby avoiding the overflow of the solution. At the same time, the heating of the bath can not only ensure that the solution in the casing is heated evenly, but also can Avoid direct contact between the heating tube and the sodium hydroxide solution, thereby avoiding damage to the heating tube, ensuring the smooth progress of the addition of the alkaline solution, and ensuring the smooth progress of the nitrification reaction during the denitrification process.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the cleaning mechanism of the present invention.

Fig. 3 is a schematic diagram of the alkaline substance adding mechanism of the present invention.

Fig. 4 is a top view of the alkaline substance adding mechanism of the present invention.

Fig. 5 is a top view of the heating assembly of the present invention.

Fig. 6 is a schematic diagram of the sealing assembly of the present invention.

Fig. 7 is a front view of the sealing assembly of the present invention.

Reference numerals are: installation frame 1, reaction barrel 2, connecting pipe 3, cleaning mechanism 4, rotating motor 41, rotating shaft 42, connecting piece 43, first connecting rod 44, second connecting rod 45, connecting ring 46, hinge Seat 47, clearing plate 48, bolt 49, alkaline substance adding mechanism 5, driving motor 51, rotating disk 52, heating assembly 53, main pipe 531, heating pipe 532, sleeve pipe 533, stirring assembly 54, stirring motor 541, rotating shaft 542, stirring blade 543, sealing assembly 55, support frame 551, adjusting motor 552, rotating part 553, sealing plate 554, magnetic part 555, limit seat 556, elastic raised end 557, electromagnetic equipment 558, guide shaft 559, guide Wheel 5510, limit tube 5511, limit block 5512, limit spring 5513, limit ball 5514.

detailed description

After the applicant's research and analysis, the reason for this problem (scaling in the container for transporting alkaline solution or sewage reaction container) is that during the denitrification process, some enterprises will put alkaline into the sewage reaction container. solution, thereby increasing the pH value in the sewage, avoiding the cessation of the nitrification reaction caused by a too low pH value, and in the selection process, sodium hydroxide is usually selected as the solute of the alkaline solution, and then the alkaline solution is completed. Adding work, because sodium hydroxide is a strong alkali, if it is added too much, it will cause a significant increase in pH. Therefore, it is necessary to add a small amount of time during the delivery process, and in the process of transportation to addition, it will cause 50 The temperature of the sodium hydroxide solution of % reduces, and then can cause sodium hydroxide crystallization and separate out from solution, the sodium hydroxide that crystallization takes place is difficult to be dissolved again, the present invention is in order to reduce the precipitation amount of sodium hydroxide crystallization from solution, Furthermore, the device is provided with a heating assembly. After the alkaline solution is located in the casing, the power supply unit supplies power to the heating tube at this time, and then the heating tube will generate more heat, and then the heating tube will increase the temperature of the bath liquid. High, and then the bath liquid will heat the alkaline solution in the casing, and then the stirring motor will also start to work, which can drive the rotating shaft to rotate, and then the moving rotating shaft can drive the stirring blade to rotate, and then the alkaline The solution is stirred, and as the temperature of the casing rises, the heating of the alkaline bath in the casing is completed. The temperature of the solution in the casing can be monitored in real time through the temperature detector, and the temperature of the solution can be monitored in time. The temperature is adjusted, wherein the casing is heated by the bath liquid placed in the main pipe, which avoids the heating tube from causing the temperature of the alkaline solution in the casing to be too high, and prevents the alkaline solution from being in a boiling state, thus avoiding the solution. At the same time, heating through the bath liquid can not only ensure that the solution in the casing is heated evenly, but also avoid direct contact between the heating tube and the sodium hydroxide solution, thereby avoiding damage to the heating tube and ensuring the smooth progress of the alkaline solution addition.

A denitrification device for urban domestic sewage, comprising: a mounting frame 1, a reaction barrel 2, a connecting pipe 3, a cleaning mechanism 4, a rotating motor 41, a rotating shaft 42, a connecting piece 43, a first connecting rod 44, and a second connecting rod 45. Connecting ring 46, hinge seat 47, clearing plate 48, bolt 49, alkaline substance adding mechanism 5, driving motor 51, rotating disk 52, heating assembly 53, main pipe 531, heating pipe 532, sleeve pipe 533, stirring assembly 54 , stirring motor 541, rotating shaft 542, stirring blade 543, sealing assembly 55, support frame 551, adjusting motor 552, rotating part 553, sealing plate 554, magnetic part 555, limit seat 556, elastic raised end 557, electromagnetic equipment 558, guide shaft 559, guide wheel 5510, limit tube 5511, limit block 5512, limit spring 5513, limit ball 5514.

As described in accompanying drawings 1 to 7, the device includes a mounting frame 1, at least one group of reaction barrels 2 symmetrically installed on the mounting frame 1, and a connecting pipe 3 for connecting the reaction barrels 2, located on the The cleaning mechanism 4 on the installation frame 1 and part of the area is located in the reaction barrel 2, and the alkaline substance addition mechanism 5 installed symmetrically on the installation frame 1; the cleaning mechanism 4 is used to clean the inner wall of the reaction barrel 2 Carry out cleaning; Described alkalinity addition mechanism 5 drops into the alkaline solution of predetermined dosage in reaction barrel 2 by the dosing port that is located on reaction barrel 2; The solute of described alkaline solution is sodium hydroxide,: when need When the domestic wastewater in the city is denitrified, the operator first injects the domestic wastewater into the reaction tank 2 through the water inlet in the reaction tank 2, and then puts chemicals into the reaction tank 2, so that the nitrification reaction occurs in the reaction tank 2 , but in this process, the pH value of the waste water decreases gradually, thereby reducing the rate of the nitrification reaction, so the operator needs to add alkaline substances to the reaction tank 2; Alkaline solution is added to the barrel 2, thereby adjusting the pH value in the sewage, avoiding the cessation of the nitrification reaction caused by the pH value being too low, thereby ensuring the smooth progress of the nitrification reaction.

The cleaning mechanism 4 includes a rotating motor 41 detached and installed on the mounting frame 1, a rotating shaft 42 arranged at the output end of the rotating motor 41, a connecting piece 43 sleeved on the rotating shaft 42, and evenly arranged on the At least three first connecting rods 44 in the circumferential direction of the connecting member 43, a second connecting rod 45 connected to the other end of the first connecting rod 44, and a connection for connecting the other end of the second connecting rod 45 Ring 46; the plane where the first connecting rod 44 is located is parallel to the bottom of the reaction barrel 2, and the length direction of the second connecting rod 45 is parallel to the axial direction of the rotating shaft 42; the first connecting rod 44 and the second connecting rod 45 are provided with a linear motion mechanism, and a cleaning portion connected with the linear motion mechanism; the cleaning portion includes a hinged seat 47 connected with the linear motion mechanism, which is located on the hinged seat 47 and is connected to the linear motion mechanism. There is a clearing plate 48 with a predetermined angle between the hinged seats 47, and a bolt 49 for connecting the cleared plate 48 and the hinged seat 47; The bottom of the barrel 2 contacts, and the cleaning plate 48 on the second connecting rod 45 abuts against the side wall of the reaction barrel 2, and under the drive of the rotating motor 41, the cleaning work to the inner wall of the reaction barrel 2 is completed; the linear motion mechanism and The injection devices are all prior art; when the reaction barrel 2 is used for a predetermined period of time, first empty the sewage in the reaction barrel 2, and then the operator can install the cleaning mechanism 4 on the mounting frame 1, and then make the output of the cleaning mechanism 4 end is located in the reaction barrel 2, then the rotating motor 41 starts to work, and then the moving rotating motor 41 can drive the rotating shaft 42 to start moving, and then the moving rotating shaft 42 can drive the connecting piece 43 to start moving, and then the moving connecting piece 43 can drive The first connecting rod 44 starts to move, and then the moving first connecting rod 44 can drive the second connecting rod 45 to start moving. The clearing plate 48 on the bottom of the reaction barrel 2 can clean the dirt on the bottom of the reaction barrel 2, and the clearing plate 48 on the second connecting rod 45 can clean the dirt on the wall of the reaction barrel 2, and then under the drive of the linear motion mechanism, and then Make clearing plate 48 can move on the length direction of respective connecting rod, and then can finish the cleaning work to reaction barrel 2; Flow out from the connecting pipe 3, and then complete the preliminary denitrification and purification of sewage; through the cleaning structure provided, the scaling in the reaction tank 2 can be cleaned, thereby ensuring the cleanliness of the inside of the reaction tank 2.

In a further embodiment, during the process of transporting to adding, the temperature of the 50% sodium hydroxide solution will decrease, which in turn will cause sodium hydroxide to crystallize and separate out from the solution, and the crystallized sodium hydroxide is difficult to be regenerated. Dissolution, which in turn leads to fouling in containers transporting alkaline solutions or sewage reaction vessels.

In order to solve the above-mentioned problems, an alkaline substance adding mechanism 5 is installed in the device, and the alkaline substance adding mechanism 5 includes a drive motor 51 connected to the mounting frame 1, and the rotation of the output end of the drive motor 51 Disk 52, at least four heating assemblies 53 arranged on the rotating disk 52, a stirring assembly 54 connected to the heating assembly 53, and a sealing assembly 55 connected to the rotating disk 52; the heating assembly 53 includes The main pipe 531, the power supply unit arranged on the main pipe 531, the heating pipe 532 connected with the power supply unit, the sleeve 533 arranged in the main pipe 531, and the inner wall for connecting the main pipe 531 and the sleeve The sealing ring of the outer wall of the pipe 533; there is a gap of a predetermined distance between the sleeve 533 and the main pipe 531; a sealed filling area is formed between the main pipe 531, the sleeve 533 and the sealing ring, and the filling area is filled Filled with bath liquid, the bath liquid wraps the heating tube 532; wherein the heating tube 532 is helical and sleeved on the sleeve 533; the diameter of the sleeve 533 is smaller than the diameter of the injection port; the bath liquid has the function of heat conduction , and then when the heating tube 532 is energized, the temperature of the bath will increase, and then the casing 533 can be heated to increase the temperature in the casing 533; the temperature detector is a prior art; When adding alkaline substances in 2, the alkaline solution is first injected into the sleeve 533 through the injection device, and then the temperature detector located in the sleeve 533 can detect the temperature of the alkaline solution located in the sleeve 533, When its temperature is lower than 12.8°C, the power supply unit supplies power to the heating tube 532, and then the heating tube 532 will generate more heat, and then the heating tube 532 will increase the temperature of the bath liquid, and then the bath liquid will The alkaline solution in the casing 533 is heated, and then the stirring motor 541 also starts to work, which can drive the rotating shaft 542 to rotate, and then the moving rotating shaft 542 can drive the stirring blade 543 to rotate, and then the alkaline solution can be Stirring work, as the temperature of the casing 533 increases, the heating of the alkaline bath in the casing 533 is completed; through the temperature detector provided, the temperature of the liquid in the casing 533 can be detected to make it The temperature can be within a predetermined range, thereby avoiding its boiling or the temperature being lower than the precipitation point of the sodium hydroxide solution, and avoiding the precipitation of sodium hydroxide crystals; at the same time, the casing 533 is heated by the bath liquid placed in the main pipe 531 to avoid The heating tube 532 is used to make the temperature of the alkaline solution in the casing 533 too high, so as to prevent the alkaline solution from being in a boiling state, thereby avoiding the overflow of the solution. At the same time, the heating of the bath liquid can not only ensure that the solution in the casing 533 is heated evenly , and can avoid direct contact between the heating tube 532 and the sodium hydroxide solution, thereby avoiding damage to the heating tube 532 and ensuring the smooth progress of the addition of the alkaline solution.

The stirring assembly 54 includes a stirring motor 541 disposed in the casing 533, a rotating shaft 542 connected to the output end of the stirring motor 541, a stirring blade 543 disposed on the rotating shaft 542, and a stirring blade 543 disposed on the rotating shaft 542. The dividing plate in the sleeve pipe 533, and a plurality of temperature detectors located on the dividing plate; the dividing plate divides the sleeve pipe 533 into two placement areas, wherein the placement area near the bottom of the sleeve pipe 533 is used Stirring motor 541 is placed, and another placement area is used for placing stirring blade 543, and rotating shaft 542 passes through dividing plate, and is provided with sealing ring between the two; The solution is stirred; the temperature detector is used to measure the temperature of the alkaline solution in the sleeve pipe 533; and the surface of the partition plate is coated with a protective film, so that the above-mentioned parts can not react with alkaline substances; through the agitating assembly 54 provided, the alkaline solution can be stirred during the heating process, thereby ensuring that the casing 533 The solution in the casing can be heated uniformly, thereby ensuring that the solution in the casing 533 can be stabilized within a predetermined range.

In a further embodiment, the container used to hold the alkaline solution in the device will rotate and move from the initial injection adding position to the adding position, and during this process, the solution in the container will generate a certain centrifugal force, This will cause the solution in the sleeve 533 to be thrown out, and since the solution contained in the container is a strong alkali solution, when the strong alkali solution contacts the device or personnel, it will cause damage to the device or personnel.

In order to solve the above-mentioned problems, a sealing assembly 55 is provided in the device, and the sealing assembly 55 includes two support frames 551 arranged on the rotating disk 52, an adjusting motor 552 arranged on one of the support frames 551, and The transmission shaft at the output end of the adjustment motor 552 is sleeved on the rotating part 553 of the transmission shaft, the sealing plate 554 connected with the rotating part 553, and the magnetic part 555 arranged on the sealing plate 554 is installed on the The electromagnetic device 558 on the other support frame 551 is symmetrically installed on both sides of the electromagnetic device 558 and a set of limit seats 556 on the support frame 551, and elastic protrusions arranged on the limit seat 556 end 557; the sealing plate 554 is also provided with a sealing gasket; at least in the working state, under the drive of the adjusting motor 552, the sealing gasket is abutted against the sleeve 533, and then the magnetic part 555 is adsorbed by the electromagnetic device 558 , the elastic protruding end 557 abuts against the magnetic part 555 to complete the sealing of the alkaline solution in the casing 533; when the heating of the alkaline solution in the casing 533 is completed, the regulating motor 552 starts to work at this time, Then the moving adjusting motor 552 can drive the transmission shaft to start to rotate, and then the moving transmission shaft can drive the rotating member 553 to start rotating, and then the moving rotating member 553 can drive the sealing plate 554 to start moving, and then the sealing gasket on the sealing plate 554 Butt against the nozzle of the sleeve 533, at this time the magnetic piece 555 can be located between the two limit seats 556, and the two elastic protruding ends 557 are abutted against the surface of the magnetic piece 555, and then the electromagnetic device 558 starts to work, and then can be positioned The magnetic part 555 between the two limit seats 556 carries out the adsorption work, and then completes the sealing work to the sleeve pipe 533; after completing the sealing work to the sleeve pipe 533, the drive motor 51 starts to work at this time, and then the moving drive motor 51 It can drive the rotating disc 52 to start rotating, and then the casing 533 containing the alkaline solution starts to rotate, and then the injection device can inject the alkaline solution into the empty casing 533, and the casing 533 containing the alkaline solution can move To the top of the dosing port on the reaction barrel 2, then the electromagnetic device 558 stops working, and then the motor 552 is adjusted to start working. The movement process is the same as above, but the movement direction of the sealing plate 554 is opposite to the above, and then the alkaline solution can be fully injected into the reaction. In the barrel 2, during this process, the injection device can inject alkaline solution into the casing 533 at the opposite position, and then the sewage after the nitrification reaction is completed is discharged from the connecting pipe 3; After injecting the solution in the casing 533, the sealing plate 554 and the sealing gasket can be used to seal the solution in the casing 533, thereby avoiding splashing of the alkaline solution during the rotation, thereby avoiding personnel casualties, at the same time through the cooperation of the electromagnetic equipment 558 and the magnetic piece 555, and through the abutment of the two elastic protruding ends 557 and the magnetic piece 555, and adjust the drive of the motor 552, and then It can ensure that the sealing gasket can abut against the nozzle of the casing 533, thereby preventing the solution from impacting the sealing plate 554 during the rotation, causing the sealing gasket to be far away from the nozzle of the casing 533, thereby ensuring the tightness of the solution in the casing 533 , to avoid splashing of the solution.

The sealing plate 554 is also provided with a limiting tube 5511, and the limiting block 5512 located in the limiting tube 5511 is connected with the limiting block 5512 and connected with the limiting spring 5513 in the limiting tube 5511. , and a limit ball 5514 connected to the other end of the limit spring 5513; a limit hole is also provided on the support frame 551, and a preset slide rail is preset on the support frame 551, and the limit The ball 5514 can move in the preset slide rail; the limit spring 5513 is in a compressed state; by setting the above-mentioned device, the sealing plate 554 can be fully expanded, so that the solution in the injection device can be completely injected into the sleeve 533 , to avoid the overflow of the solution during the injection process, thereby ensuring the smooth progress of the solution addition work.

The sealing plate 554 is provided with a guide shaft 559, and a guide wheel 5510 arranged at one end of the guide shaft 559; wherein the guide wheel 5510 is provided with a limiting groove axially, and the support frame 551 is provided with a limiting groove. The chute, the limit groove is adapted to the limit slide rail; the support frame 551 is also provided with protrusions and depressions; at least in the sealing process, the guide wheels 5510 pass through the support frame 551 in sequence In the sealed state, the guide wheel 5510 is located at the concave part; the limit groove and the limit slide rail provided by the sleeve 533 can prevent the sealing plate 554 from moving on the guide shaft 559 during its movement. Moving in the axial direction ensures that the sealing plate 554 can seal the nozzle of the sleeve 533 , so that the sealing gasket can cover the nozzle of the sleeve 533 , thereby preventing the solution in the sleeve 533 from splashing.

Description of working principle: When it is necessary to denitrify the domestic wastewater in the city, the operator first injects the domestic wastewater into the reaction tank 2 through the water inlet in the reaction tank 2, and then puts chemicals into the reaction tank 2, and then makes the Nitrification reaction occurs in reaction tank 2, but during this process, the pH value of wastewater decreases gradually, thereby reducing the rate of nitrification reaction, so the operator needs to add alkaline substances to reaction tank 2; When adding alkaline substances, the alkaline solution is injected into the casing 533 through the injection device earlier, and then the temperature detector in the casing 533 can detect the temperature of the alkaline solution in the casing 533, when it When the temperature is lower than 12.8°C, the power supply unit supplies power to the heating tube 532, and the heating tube 532 will generate more heat, and the heating tube 532 will increase the temperature of the bath liquid, and then the bath liquid will The alkaline solution in 533 is heated, and then the stirring motor 541 also starts to work, and then can drive the rotating shaft 542 to rotate, and then the moving rotating shaft 542 can drive the stirring blade 543 to rotate, and then the alkaline solution can be stirred , as the temperature of the casing 533 increases, the heating of the alkaline bath solution in the casing 533 is completed; after the heating of the alkaline solution in the casing 533 is completed, the regulating motor 552 starts to work at this time, and then The moving adjusting motor 552 can drive the transmission shaft to start rotating, and then the moving transmission shaft can drive the rotating part 553 to start rotating, and then the moving rotating part 553 can drive the sealing plate 554 to start moving, and then the sealing gasket on the sealing plate 554 can be in contact with the Sleeve 533 nozzle abuts, and now magnetic part 555 can be positioned between two position-limiting seats 556, and two elastic protruding ends 557 abut against the surface of magnetic part 555, and then electromagnetic equipment 558 starts to work, and then can be positioned at two The magnetic part 555 between the limit seats 556 carries out the adsorption work, and then completes the sealing work to the sleeve pipe 533; Drive the rotating disk 52 to start rotating, and then the casing 533 that is equipped with alkaline solution starts to rotate, then the injection device can inject alkaline solution in the empty casing 533, and the casing 533 that is equipped with alkaline solution can move to Above the dosing port on the reaction barrel 2, then the electromagnetic device 558 stops working, and then the motor 552 is adjusted to start working. The movement process is the same as above, but the movement direction of the sealing plate 554 is opposite to the above, so that the alkaline solution can be completely injected into the reaction barrel In 2, during this process, the injection device can inject alkaline solution into the casing 533 at the opposite position, and then the sewage after the nitrification reaction is completed is discharged from the connecting pipe 3; when the reaction barrel 2 is used for a predetermined period of time, it should be emptied first The sewage in the reaction barrel 2, then the operator can install the cleaning mechanism 4 on the mounting frame 1, then make the output end of the cleaning mechanism 4 be located in the reaction barrel 2, then the rotating motor 41 starts to work, and then the moving rotating motor 4 1. It can drive the rotating shaft 42 to start moving, and then the moving rotating shaft 42 can drive the connecting piece 43 to start moving, and then the moving connecting piece 43 can drive the first connecting rod 44 to start moving, and then the moving first connecting rod 44 can drive the first connecting rod 44 to start moving. Two connecting rods 45 start to move, and in the process that the first connecting rod 44 and the second connecting rod 45 rotate, the cleaning plate 48 positioned on the first connecting rod 44 can clean the dirt at the bottom of the reaction barrel 2, and the dirt on the second connecting rod 45 can be cleaned. The cleaning plate 48 on the connecting rod 45 can clean the dirt on the barrel wall of the reaction barrel 2, and then under the drive of the linear motion mechanism, the cleaning plate 48 can move in the length direction of the connecting rod respectively, and then the reaction can be completed. Cleaning of barrel 2; when the above cleaning work is completed, repeat the above steps S1~S4 at this time, so that the sewage after the nitrification reaction can flow out from the connecting pipe 3, and then complete the preliminary denitrification and purification of sewage.

The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be carried out to the technical solutions of the present invention. These equivalent transformations all belong to the protection scope of the present invention.

Claims (10)

1. The utility model provides a denitrification facility for municipal domestic sewage, characterized by includes:

the device comprises a mounting rack, at least one group of reaction barrels symmetrically mounted on the mounting rack, a connecting pipe used for connecting the reaction barrels, a cleaning mechanism arranged on the mounting rack and positioned in the reaction barrels in part of the area, and an alkaline adding mechanism symmetrically mounted on the mounting rack;

the cleaning mechanism is used for cleaning precipitates on the inner wall of the reaction barrel;

the alkaline substance adding mechanism adds alkaline solution with a set dosage into the reaction barrel through a dosing port arranged on the reaction barrel.

2. The denitrification device for urban domestic sewage according to claim 1, wherein: the cleaning mechanism comprises a rotating motor detachably mounted on the mounting frame, a rotating shaft arranged at the output end of the rotating motor, a connecting piece sleeved on the rotating shaft, at least three first connecting rods uniformly arranged on the circumferential direction of the connecting piece, a second connecting rod connected with the other end of the first connecting rod, and a connecting ring used for connecting the other end of the second connecting rod;

the plane of the first connecting rod is parallel to the bottom of the reaction barrel, and the length direction of the second connecting rod is parallel to the axial direction of the rotating shaft.

3. The denitrification device for urban domestic sewage according to claim 2, wherein: the first connecting rod and the second connecting rod are respectively provided with a linear motion mechanism and a cleaning part connected with the linear motion mechanism;

the cleaning part comprises a hinged seat connected with the linear motion mechanism, a cleaning plate arranged on the hinged seat and having a preset angle with the hinged seat, and a bolt used for connecting the cleaning plate and the hinged seat;

at least when the reaction barrel is in a working state, the cleaning plate positioned on the first connecting rod is contacted with the bottom of the reaction barrel, the cleaning plate on the second connecting rod is abutted against the side wall of the reaction barrel, and the cleaning work on the inner wall of the reaction barrel is completed under the driving of the rotating motor.

4. The denitrification device for urban domestic sewage according to claim 1, wherein: the alkaline substance adding mechanism comprises a driving motor connected with the mounting frame, a rotating disc arranged at the output end of the driving motor, at least four heating assemblies arranged on the rotating disc, a stirring assembly connected with the heating assemblies, and a sealing assembly connected with the rotating disc.

5. The denitrification device for urban domestic sewage according to claim 4, wherein: the heating assembly comprises a main pipe, a power supply unit arranged on the main pipe, a heating pipe connected with the power supply unit, a sleeve arranged in the main pipe, and a sealing ring used for connecting the inner wall of the main pipe with the outer wall of the sleeve;

a gap with a set distance is formed between the sleeve and the main pipe;

a sealed filling area is formed among the main pipe, the sleeve and the sealing ring, bath lotion is filled in the filling area, and the heating pipe is wrapped by the bath lotion;

wherein the heating pipe is spiral and is sleeved on the sleeve.

6. The denitrification device for the municipal domestic sewage according to claim 5, wherein: the stirring assembly comprises a stirring motor arranged in the sleeve, a rotating shaft connected with the output end of the stirring motor, stirring blades arranged on the rotating shaft, a partition plate arranged in the sleeve and a plurality of temperature detectors arranged on the partition plate;

the separation plate divides the sleeve into two placing areas, wherein the placing area close to the bottom of the sleeve is used for placing the stirring motor, the other placing area is used for placing the stirring blade, the rotating shaft penetrates through the separation plate, and a sealing ring is arranged between the rotating shaft and the separation plate;

the stirring blade is used for stirring the alkaline solution in the sleeve;

the temperature detector is used for measuring the temperature of the alkaline solution in the sleeve.

7. The denitrification device for urban domestic sewage according to claim 4, wherein: the sealing assembly comprises two support frames arranged on the rotating disc, an adjusting motor arranged on one support frame, a transmission shaft arranged at the output end of the adjusting motor, a rotating part sleeved on the transmission shaft, a sealing plate connected with the rotating part, a magnetic part arranged on the sealing plate, electromagnetic equipment arranged on the other support frame, a group of limiting seats symmetrically arranged on two sides of the electromagnetic equipment and positioned on the support frames, and elastic convex ends arranged on the limiting seats;

the sealing plate is also provided with a sealing gasket;

at least when the sealing device is in a working state, the sealing gasket is abutted to the sleeve under the driving of the adjusting motor, then the magnetic part is adsorbed by the electromagnetic equipment, and the elastic convex end is abutted to the magnetic part to finish the sealing of the alkaline solution in the sleeve.

8. The denitrification device for the municipal domestic sewage according to claim 7, wherein: the sealing plate is also provided with a limiting pipe, a limiting block positioned in the limiting pipe, a limiting spring connected with the limiting block and connected with the limiting pipe, and a limiting ball connected with the other end of the limiting spring;

the support frame is also provided with a limiting hole and a preset sliding rail, the preset sliding rail is arranged on the support frame, and the limiting ball can move in the preset sliding rail

The limiting spring is in a compressed state.

9. The denitrification device for urban domestic sewage according to claim 8, wherein: the sealing plate is provided with a guide shaft and a guide wheel arranged at one end of the guide shaft;

the guide wheel is axially provided with a limiting groove, the support frame is provided with a limiting sliding groove, and the limiting groove is matched with the limiting sliding rail;

the supporting frame is also provided with a convex part and a concave part;

at least in the sealing process, the guide wheel sequentially passes through the convex part and the concave part on the supporting frame, and in the sealing state, the guide wheel is positioned at the concave part.

10. The denitrification method of the denitrification facility for the municipal sewage according to any one of claims 1 to 9, comprising the steps of:

s1: when the domestic wastewater in cities needs to be subjected to denitrification treatment, an operator firstly injects the domestic wastewater into the reaction barrel through the water inlet in the reaction barrel, then adds a medicament into the reaction barrel, and further causes nitrification reaction in the reaction barrel, but in the process, the pH value of the wastewater is gradually reduced, so that the rate of the nitrification reaction is reduced, and therefore the operator needs to add an alkaline solution into the reaction barrel;

s2: when alkaline solution needs to be added into the reaction barrel, the alkaline solution is injected into the sleeve through the injection device, then the temperature detector in the sleeve can detect the temperature of the alkaline solution in the sleeve, when the temperature of the temperature detector is lower than 12.8 ℃, the power supply unit supplies power to the heating pipe, the heating pipe can generate more heat, the heating pipe can increase the temperature of bath liquid, the bath liquid can heat the alkaline solution in the sleeve, then the stirring motor starts to work, the rotating shaft can be driven to rotate, the moving rotating shaft can drive the stirring blades to rotate, the alkaline solution can be stirred, and the heating work of the alkaline solution in the sleeve is completed along with the increase of the temperature of the sleeve;

s3: after the heating work of the alkaline solution in the sleeve is finished, the adjusting motor starts to work at the moment, the moving adjusting motor can drive the transmission shaft to start to rotate, the moving transmission shaft can drive the rotating part to start to rotate, the moving rotating part can drive the sealing plate to start to move, the sealing gasket on the sealing plate is abutted to the pipe orifice of the sleeve, the magnetic part can be positioned between the two limiting seats, the two elastic convex ends are abutted to the surface of the magnetic part, then the electromagnetic equipment starts to work, and the magnetic part positioned between the two limiting seats can be adsorbed, so that the sealing work of the sleeve is finished;

s4: after the sealing work of the sleeve is finished, the driving motor starts to work at the moment, the moving driving motor can drive the rotating disc to start rotating, the sleeve filled with the alkaline solution starts to rotate, then the injection device can inject the alkaline solution into the empty sleeve, the sleeve filled with the alkaline solution can move to the position above the chemical feeding hole in the reaction barrel, then the electromagnetic equipment stops working, then the adjusting motor starts to work, the moving process is the same as the moving process, but the moving direction of the sealing plate is opposite to the moving direction, so that the alkaline solution can be completely injected into the reaction barrel, in the process, the injection device can inject the alkaline solution into the sleeve at the opposite position, and then the sewage after the nitration reaction is finished is discharged from the connecting pipe;

s5: when the reaction barrel is used for a preset time period, firstly, sewage in the reaction barrel is emptied, then an operator can install the cleaning mechanism on the mounting frame, then the output end of the cleaning mechanism is positioned in the reaction barrel, then the rotating motor starts working, further, the moving rotating motor can drive the rotating shaft to start moving, further, the moving rotating shaft can drive the connecting piece to start moving, further, the moving connecting piece can drive the first connecting rod to start moving, then, the moving first connecting rod can drive the second connecting rod to start moving, in the rotating process of the first connecting rod and the second connecting rod, the cleaning plate positioned on the first connecting rod can clean the dirt at the bottom of the reaction barrel, the cleaning plate positioned on the second connecting rod can clean the dirt on the barrel wall of the reaction barrel, and then, under the driving of the linear motion mechanism, the cleaning plates can move in the length direction of the respective connecting rods, further, the cleaning work of the reaction barrel can be completed;

s6: after the cleaning work is finished, the steps S1-S4 are repeated at the moment, so that the sewage after the nitration reaction is finished can flow out from the connecting pipe, and the preliminary denitrification and purification work of the sewage is finished.

Images