CN105905957A - Chemical dosing device of sewage treatment equipment capable of automatically computing chemical dose via PCL - Google Patents

Abstract

This application discloses a sewage treatment equipment dosing device that automatically calculates the dosing dose of PCL, including a raw water inlet pipe, a raw water outlet pipe, and a drug reaction tank suspended in the air; A sphere passes through and is connected to the bottom of the reaction pool; several ventilation holes are uniformly arranged on the sphere; at least one powdered drug box is arranged on the top of the drug reaction pool; a drug delivery box is arranged at the bottom of each powdered drug box The other end of the drug delivery pipe is connected with a spray head; the raw water inlet pipe is provided with a flow sensor and a flow rate sensor connected to the PLC. After adopting the above structure, the drug reaction pool is small in volume and suspended in the air, does not occupy the actual contact space of the vehicle tool, and saves the space of the vehicle tool. In addition, the dosing device can automatically calculate the dosage and frequency of dosing according to the raw water flow value and raw water velocity data in the water inlet pipe, so that the dosing dosage is accurate.

Description

Sewage treatment equipment dosing device for automatic calculation of dosing dosage by PCL

technical field

The application relates to a dosing device, in particular to a dosing device for mobile sewage treatment equipment.

Background technique

At present, the discharge of urban domestic sewage is the main pollution source of urban water in China, and the treatment of urban domestic sewage is the top priority of urban water conservation and urban water environment protection at present and in the future. This requires us to take the construction of domestic sewage treatment facilities as a priority The important content of urban infrastructure is to be grasped, and it is a matter of urgency.

Sewage treatment is an important process to deal with water pollution. Use physical, biological, and chemical methods to treat industrial wastewater and domestic sewage to separate solid pollutants in water and reduce organic pollutants and eutrophic substances (mainly nitrogen and phosphorus compounds) in water, thereby reducing the impact of sewage on the environment. pollute.

Before sewage treatment, it is generally necessary to pre-treat sewage with chemicals, such as adding NaClO to remove bacteria and microorganisms in sewage to prevent bacteria from damaging subsequent filter membranes; adding sensitizers to facilitate microwave reactions, etc.

At present, the dosing device generally includes a dosing tank, a medicine storage tank, a medicine mixing tank, a metering pump and supporting pipelines, valves, etc., and it is also a necessary part of all dosing devices. Among them, the metering pump is the most critical part. In actual engineering, it often occurs that the inaccurate selection of the metering pump will affect the entire dosing. Metering pumps often use mechanical diaphragm pumps, which are driven by compressed air. They are volumetric pumps whose volume changes due to the reciprocating deformation of the diaphragm. Basic parameters include flow and head. On the nameplate of the metering pump, it can often be seen that the metering pump has a very wide selection range, and the factory design water supply and drainage professionals often give selections such as 0-200 L/h, 0-400 L/h parameters, but in fact, the metering pump also has its best working condition. If the actual flow deviates from the best working condition, the flow rate of the metering pump will actually be inaccurate. According to the actual field experience, the optimal opening of the metering pump is 50%, that is, when the working flow is half of the maximum flow of the metering pump, the metering pump is in the best working state. Accurate, it will lead to inaccurate dosing amount.

According to the requirements of environmental protection laws and regulations, industrial sewage generating units need to be equipped with sewage treatment equipment. For most industrial production enterprises, fixed sewage treatment equipment is usually set up according to the status of the specific sewage. The advantage of fixed sewage treatment equipment is that sewage treatment devices can be installed according to needs, without being limited by the size of the space.

However, in many cases, some sudden water pollution situations need to be dealt with urgently, such as the Songhua River pollution incident and the sudden rupture of sewage pipes in enterprises. In this kind of situation, due to the uncertainty of time and place, a mobile sewage treatment equipment is needed, so as to arrive at the scene of the incident at the first time to treat the sewage in a timely manner. For this reason, various corresponding sewage treatment equipments have been proposed in the prior art.

The Chinese utility model patent with the application number 200420099630.0 published on January 25, 2006, the name of its invention is "a vehicle-mounted sewage treatment equipment", which adopts a vehicle-mounted box structure and integrates adsorption, flocculation and sedimentation , two drug storage pools are symmetrically arranged at the front end of the equipment, and a dispensing pool is located at the lower part of the drug storage pools; a control cabinet is installed between the two drug storage pools, and a high-pressure air pump and a magnetic drive pump are installed at the lower part of the control cabinet; a drug mixing pool and a drug mixing pool are installed at the front of the equipment Raw water inlet is installed on one side, a sedimentation tank is installed in the middle of the equipment, a water collection tank is installed in the upper part of the sedimentation tank, an inclined tube settler is installed in the middle, a sand filter is installed in the rear end of the equipment, and a filter layer composed of quartz sand layer and gravel layer is installed in the middle of the sand filter , The water outlet is set at the upper rear end of the sand filter; the bottom of the mixing tank, the sedimentation tank, and the sand filter are all equipped with a mud discharge cone bottom. The mud discharge main pipe is connected to each mud discharge cone bottom to form a mud discharge channel.

The above-mentioned vehicle-mounted sewage treatment equipment has the following deficiencies:

1. When dosing the raw water, a large volume dispensing pool, a medicine storage pool and a medicine mixing pool are arranged side by side on the vehicle-mounted box structure. These structures will occupy a large part of the volume of the vehicle, which does not meet the size requirements of the vehicle.

2. The metering of each drug addition is fixed, and the drug cannot be added according to the actual flow of sewage.

a) When the flow of raw water is large, adding a fixed amount of chemicals will not be able to remove all impurities and microorganisms in the raw water, which will cause the sewage treatment indicators to fail to meet the standards and flow into the subsequent sedimentation and filtration process.

b) When the raw water flow rate is small, add a fixed amount of chemical agent. At this time, the amount of chemical agent will be added too much, which will cause new pollution to the raw water, and subsequent devices or steps for chemical removal will need to be added.

The Chinese invention patent with the application number 200810084959.2 published on August 6, 2008 is titled "Mobile Sewage Treatment Equipment".

The above-mentioned patent application includes a carrier, a microwave sewage treatment system installed on the carrier, and a sedimentation filter device arranged downstream of the microwave reactor and connected to the sewage outlet of the microwave reactor through a pipeline , and the sensitizer and other water treatment agent addition devices arranged in the upstream pipeline of the microwave reactor.

The above-mentioned sensitizer and other water treatment agent adding devices are arranged on the front wheel group platform or the rear wheel group platform at the other end of the sedimentation filter device. Described sensitizer and other water treatment agent adding devices comprise a mixing reaction tank, the sensitizer medicine storage tank that is communicated with described mixing reactor, and are used for adding other in the sewage that has added described sensitizer Other additive storage tanks for additives; a stirrer is set in the mixing reactor.

The above-mentioned mixing reactor communicates with the sensitizer storage tank through a delivery pipe with a metering pump; Add other additives. A stirrer is also provided in the sensitizer storage tank. The mixing reactor and the agitator in the gas agitator in the sensitizer storage tank are all gas agitators, and share a gas pipeline.

The above-mentioned mobile sewage treatment equipment solves the technical problems of uniform chemical dosing and low microwave utilization in the existing microwave sewage treatment system. But still there are following deficiencies:

1. When dosing raw water, multiple sensitizers and other water treatment agent addition devices, as well as mixing reaction boxes, are still installed on the vehicle, such as the car body. These structures will also occupy a large part of the volume of the vehicle, which does not meet the requirements of the vehicle size.

2. The metering of each drug addition is still fixed, and it is still impossible to add drugs according to the actual flow of sewage. There is still the problem of insufficient or excessive addition of medicines.

Contents of the invention

The technical problem to be solved in this application is to provide a dosing device for mobile sewage treatment equipment in view of the above-mentioned deficiencies in the prior art. The dosing device can automatically calculate the Dosing dosage and dosing frequency, so that dosing dosage is accurate.

Secondly, the application also provides a dosing device for mobile sewage treatment equipment. The dosing device uses powdered medicine to directly spray in the raw water and mix it with gas. The medicine reaction pool is small in volume and can be directly suspended in the air without occupying the vehicle tools. The actual contact space, while the drug mixing is very uniform.

In order to solve the problems of the technologies described above, the technical solution adopted in this application is:

A dosing device for mobile sewage treatment equipment, comprising a raw water inlet pipe, a raw water outlet pipe, and a drug reaction pool suspended between the raw water inlet pipe and the raw water outlet pipe; a gas pipeline is arranged at the bottom of the drug reaction pool, and the gas The pipeline passes through the bottom of the drug reaction pool and is connected with a sphere; the sphere is arranged coaxially with the drug reaction pool; several ventilation holes are evenly arranged on the sphere; at least one powdered drug box is arranged on the top of the drug reaction pool; each The bottom of the powder medicine box is provided with a drug delivery tube, and the other end of the drug delivery tube passes through the top of the drug reaction pool, and is connected with a spray head through an automatic valve; each of the drug delivery tubes is provided with a A metering pump; the raw water inlet pipe is provided with a flow sensor and a flow velocity sensor connected to the PLC.

The volume of the drug reaction tank is twice the maximum flow per minute in the raw water inlet pipe.

The drug reaction pool is arranged obliquely between the raw water inlet pipe and the raw water outlet pipe.

The included angle between the drug reaction tank and the raw water inlet pipe is 30°.

Each of the powdered medicine boxes is provided with a weight sensor.

After the application adopts the above-mentioned structure, it has the following beneficial effects:

1. The above-mentioned drug reaction pool is small in size and suspended in the air, which does not occupy the actual contact space of the vehicle tool and saves the space of the vehicle tool.

2. The dosing device can automatically calculate the dosage and frequency of dosing according to the raw water flow value and raw water velocity data in the water inlet pipe, so that the dosing dosage is accurate. At the same time, the present application adopts the powdered medicament to be directly sprayed in the raw water, and mixed with gas, so the mixture is uniform.

Description of drawings

Fig. 1 is a schematic structural view of a dosing device for mobile sewage treatment equipment of the present application.

Among them: 1. Raw water inlet pipe; 2. Raw water outlet pipe; 3. Drug reaction tank; 4. Gas pipeline; 5. Sphere; 6. Ventilation hole; 7. Powdered medicine box; Sprinkler head; 10. Metering pump; 11. Flow sensor; 12. Flow rate sensor; 13. Weight sensor; 14. Automatic valve.

detailed description

The present application will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

As shown in FIG. 1 , a dosing device for mobile sewage treatment equipment includes a raw water inlet pipe 1 , a raw water outlet pipe 2 , and a drug reaction tank 3 suspended between the raw water inlet pipe 1 and the raw water outlet pipe 2 .

The volume of the drug reaction tank 3 is twice the maximum flow per minute in the raw water inlet pipe 1 . In this way, the volume of the drug reaction pool 3 can be designed to be very small, and it can be set in the air without occupying the actual contact space of the vehicle tool, thus saving the space of the vehicle tool.

The drug reaction pool 3 is preferably in the shape of an ellipse cylinder, and the bottom of the drug reaction pool 3 is provided with a gas pipeline 4 , which passes through the bottom of the drug reaction pool 3 and is connected to a sphere 5 .

The above-mentioned sphere 5 is arranged coaxially with the drug reaction pool 3; several ventilation holes 6 are evenly arranged on the sphere 5.

The setting of the above-mentioned spherical body 5 will cause the gas to be ejected from each vent hole 6 in the spherical body 5 . In this way, the gas ejected from the vent hole 6 can be shot in various directions, so that the mixing of the medicine and the raw water in the medicine reaction tank 3 is more uniform.

In addition, the height of the top of the sphere 5 is preferably equal to the height of the bottom inner wall of the raw water inlet pipe 1 . The diameter of the sphere 5 is about 1/3rd of the pipe diameter of the raw water inlet pipe 1 . In this way, the airflow sprayed from each vent hole 6 can flow from bottom to top, so that the sprayed liquid medicine can be more evenly mixed.

At least one powder medicine box 7 is arranged on the top of the drug reaction pool 3 . The bottom of each powdered medicine box 7 is provided with a medicine delivery tube 8 , the other end of the medicine delivery tube 8 passes through the top of the medicine reaction tank 3 , and is connected with a spray head 9 through an automatic valve 14 . The diameter of the sprinkler head 9 is preferably larger than that of the sphere 5, so that the spraying of the medicament can be made finer and the spraying area wider, so that the powdered medicament can be dissolved in the raw water evenly and quickly.

Each of the drug delivery pipes 8 is provided with a metering pump 10 capable of evenly metering the medicament sprayed by the spraying head 9 .

The raw water inlet pipe 1 is provided with a flow sensor 11 and a flow velocity sensor 12 connected to the PLC. The medicine reaction tank 3 can automatically calculate the dose and frequency of dosing according to the data of the raw water flow rate and the raw water velocity value in the raw water inlet pipe 1, so that the dosing dose is accurate.

Each of the powdered medicine boxes 7 is provided with a weight sensor 13 which can accurately weigh the powdered medicine in the corresponding powdered medicine box 7 .

As a further improvement, the drug reaction pool 3 is arranged obliquely between the raw water inlet pipe 1 and the raw water outlet pipe 2, and the angle between the drug reaction pool 3 and the raw water inlet pipe 1 is preferably 30°. In this way, the powdered medicine can be dissolved with the raw water first, and then uniformly mixed with the gas, and a buffer time is reserved for the gas mixing, so that the mixing is more uniform.

Claims (1)

1. a mobile sewage disposal device chemicals dosing plant, it is characterised in that: include former water water inlet pipe (1), former water outlet pipe And unsettled be arranged at former water water inlet pipe (1) and former water outlet pipe (2) drug reaction pond (3) between the two (2)；Drug reaction Pond (3) bottom be provided with gas pipeline (4), this gas pipeline (4) from the bottom of drug reaction pond (3) pond through and connect have a ball Body (5)；Spheroid (5) is coaxially disposed with drug reaction pond (3)；Several passages (6) it have been evenly arranged on spheroid (5)；Medicine The top of reaction tank (3) is provided with at least one mealy medicine box (7)；The bottom of each mealy medicine box (7) is provided with one Root grug transportation tube (8), the other end of grug transportation tube (8) passes from the top of drug reaction pond (3), and is connected by automatic valve (14) There is a sprinkler head (9)；It is provided with dosing pump (10) on each described grug transportation tube (8)；Described former water water inlet pipe (1) is upper to be arranged There is the flow transducer (11) and flow sensor (12) being connected with PLC；

The volume of described drug reaction pond (3) is in former water water inlet pipe (1) 2 times of interior maximum stream flow per minute；Described medicine is anti- Ying Chi (3) is inclined at former water water inlet pipe (1) and former water outlet pipe (2) between the two；The diameter of sprinkler head is more than spheroid Diameter；

It is provided with weight sensor (13) on each described mealy medicine box (7).