CN217025455U

CN217025455U - Medicine adding device

Info

Publication number: CN217025455U
Application number: CN202123406895.3U
Authority: CN
Inventors: 戴光光; 曾晓红; 孙强; 李岱; 何慧虔; 何树刚; 付鑫; 沈建峰; 朱利荣; 沈正洪
Original assignee: Zhejiang Xiuzhou Thermoelectricity Co ltd
Current assignee: Zhejiang Xiuzhou Thermoelectricity Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-07-22
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a dosing device, which adopts an assembling and disassembling scheme and is convenient and fast to operate. A dosing device comprises a dosing barrel, wherein the bottom of the dosing barrel is connected with a first outlet valve, the first outlet valve is communicated with a metering barrel through a pipeline, a ball float valve is installed in the metering barrel, the bottom of the metering barrel is connected with a second outlet valve, the outflow end of the second outlet valve is connected with a flow meter, the outflow end of the flow meter is connected with a first inlet valve through a dosing pipe, the outflow end of the first inlet valve is connected with a dosing port of a Venturi tube, and a water inlet of the Venturi tube is connected with a water taking pipe; the water taking pump is further included, and a motor is connected to the rotating shaft end of the water taking pump; the water inlet end of the water taking pump is connected with a second inlet valve, the second inlet valve is communicated with the medicine outlet of the Venturi tube, the water outlet end of the water taking pump is connected with a first check valve, the water outlet end of the first check valve is connected with the water inlet end of a first water outlet gate valve through a pipeline, and the water outlet end of the first water outlet gate valve is communicated with the clarification tank through a pipeline.

Description

Medicine adding device

Technical Field

The utility model belongs to the technical field of water pretreatment, and particularly relates to a dosing device.

Background

In a coal-fired thermal power plant, a water pretreatment system usually takes river water as raw water, and natural water body often contains suspended matters such as silt, clay, humus and colloid impurities, which can influence the normal operation of subsequent desalting equipment if not removed, and once calcium and magnesium ions in the impurities enter a boiler, the scaling and corrosion of the boiler can be caused, so that the steam quality of boiler water is deteriorated. The clarification tank is the first-stage equipment of most coal-fired thermal power factory pretreatment of water system, and four kinds of processes of coagulating, settling, clarification, filtration to the raw water can be realized to a plurality of clarification tanks in the operation in-process, can effectively remove most suspended solids, colloid and organic matter in aqueous.

Coagulation treatment is the primary step of water treatment. Coagulation is the process of adding a chemical agent into water to neutralize and bond with impurities in water to form large-particle precipitate, so as to destabilize the impurities and collect and sink the impurities to purify water. The chemical agent is added through a dosing device, and a complete set of dosing device generally undertakes the tasks of storage, transportation, dosing and the like of the chemical agent. The existing dosing device in the market at present usually takes a single metering pump as main dosing equipment and is provided with an electric control system, and although accurate dosing of a medicament can be realized, the problems of large occupied area, high price, high failure rate, high power consumption and energy consumption and the like exist at the same time. As a traditional manufacturing industry, in the power industry, various manufacturers actively seek powerful measures for energy conservation and emission reduction at present under the background of a 'double-carbon' policy. Therefore, it is necessary to design a dosing device which is simple in installation, convenient and fast to operate, stable in operation and capable of meeting dosing accuracy in water treatment.

Disclosure of Invention

In view of the above drawbacks of the prior art, the present invention provides a drug adding device, which is easy to assemble and disassemble.

In order to solve the technical problem, the utility model aims to realize that:

a dosing device comprises a dosing barrel, wherein the bottom of the dosing barrel is connected with a first outlet valve, the first outlet valve is communicated with a metering barrel through a pipeline, a ball float valve is installed in the metering barrel, the bottom of the metering barrel is connected with a second outlet valve, the outflow end of the second outlet valve is connected with a flowmeter, the outflow end of the flowmeter is connected with a first inlet valve through a dosing pipe, the outflow end of the first inlet valve is connected with a dosing port of a Venturi pipe, and a water inlet of the Venturi pipe is connected with a water taking pipe;

the water taking pump is further included, and a motor is connected to the rotating shaft end of the water taking pump; the water inlet end of the water taking pump is connected with a second inlet valve, the second inlet valve is communicated with the medicine outlet of the Venturi tube, the water outlet end of the water taking pump is connected with a first check valve, the water outlet end of the first check valve is connected with the water inlet end of a first water outlet gate valve through a pipeline, and the water outlet end of the first water outlet gate valve is communicated with the clarification tank through a pipeline.

On the basis of the above scheme and as a preferable scheme of the scheme: a pressure gauge is connected between the first check valve and the first water outlet gate valve.

On the basis of the above scheme and as a preferable scheme of the scheme: the dosing barrel is placed on a step, and the step is formed by welding concrete or steel pipes; the top opening of the medicine adding barrel is covered with an upper cover.

On the basis of the above scheme and as a preferable scheme of the scheme: the first outlet valve and the second outlet valve are manual ball valves.

On the basis of the above scheme and as a preferable scheme of the scheme: the material of the ball float valve is plastic.

On the basis of the above scheme and as a preferable scheme of the scheme: the first inlet valve is an electrically operated regulator valve.

On the basis of the above scheme and as a preferable scheme of the scheme: the second inlet valve and the first water outlet gate valve are gate valves, and the movement direction of the gate plates is vertical to the water flow direction.

Compared with the prior art, the utility model has the outstanding and beneficial technical effects that:

compared with the prior art, the dosing device is characterized in that the dosing barrel is arranged on the step, liquid medicine prepared in the dosing barrel flows into the dosing barrel under the action of gravity, the floating ball valve is arranged in the dosing barrel, the liquid medicine level can be automatically controlled as required, the venturi tube can suck the liquid medicine and fully mix the liquid medicine with raw water when a large amount of raw water is pumped by the aid of the water taking pump, the sucked liquid medicine is in direct proportion to the pumped raw water, in addition, the DCS (distributed control system) can control the opening degree of the first inlet valve by extracting water quality data after mixing of the clarification tank, and accordingly the aim of accurately dosing is fulfilled.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Reference numerals: a medicine adding barrel 1; a step 2; a first outlet valve 3; a medicine metering barrel 4; a float valve 5; a second outlet valve 6; a flow meter 7; a dosing tube 8; a first inlet valve 9; a water intake pipe 10; a venturi tube 11; a second inlet valve 12; a water taking pump 13; a motor 14; a first check valve 15; a pressure gauge 16; a first water outlet gate valve 17; a clarifier 18;

Detailed Description

The utility model will be further described in the following with specific embodiments in conjunction with the accompanying drawings;

the embodiment provides a dosing device, which comprises a dosing barrel 1, wherein liquid medicine is placed in the dosing barrel 1 and used for regulating the concentration of the liquid medicine and prolonging the dosing period; the bottom of the dosing barrel 1 is connected with a first outlet valve 3, the bottom of the dosing barrel 1 is connected with a pipeline, a flange ring is arranged on the pipeline, and the water inlet end and the water outlet end of the first outlet valve 3 are also provided with flange rings which penetrate through bolts for connection;

the first outlet valve 3 is communicated with a metering medicine barrel 4 through a pipeline, and a ball float valve 5 is arranged in the metering medicine barrel 4 and used for controlling the medicine adding flow and automatically adding medicine; the bottom of the metering medicine barrel 4 is connected with a second outlet valve 6, and the second outlet valve 6 and the metering medicine barrel 4 are also connected and fixed through flanges; the outflow end of the second outlet valve 6 is connected with a flowmeter 7, the bottom of the flowmeter 7 is provided with a pipeline with flange rings at two ends, and the flowmeter 7 is a liquid flow sensor; the outflow end of the flowmeter 7 is connected with a first inlet valve 9 through a dosing pipe 8, the dosing pipe 8 is a pipeline with flange rings at two ends, and the flange rings are arranged at two ends of the first inlet valve 9 and fixedly connected through bolts; the outflow end of the first inlet valve 9 is connected with the medicine inlet of a Venturi tube 11, and the water inlet of the Venturi tube 11 is connected with a water taking pipe 10; the Venturi tube 11 adopts a mixer structure of an anticorrosion Venturi tube 11 with the patent number CN 201621451231.5; flange rings are arranged on three ports of the Venturi tube 11, the water taking pipe 10 obtains raw water, the raw water is mixed with liquid medicine flowing into the first inlet valve 9 in the Venturi tube 11, and the Venturi tube 11 generates negative pressure to suck the liquid medicine; the Venturi tube 11 consists of a reducing tube, a throat tube and a gradually-protecting tube;

the water taking pump 13 is further included, and a motor 14 is connected to the rotating shaft end of the water taking pump 13; the motor 14 drives the impeller of the water taking pump 13 to rotate so as to practically pump raw water; the water inlet end of the water taking pump 13 is connected with a second inlet valve 12, the second inlet valve 12 is communicated with the medicine outlet of the Venturi tube 11, and the second inlet valve 12 is used for sending the mixed liquid of the raw water and the liquid medicine to the next working section; the water outlet end of the water taking pump 13 is connected with a first check valve 15, two end parts of the first check valve 15 are also connected through flange rings, and the first check valve 15 only allows water to flow in a specified direction and prevents backflow; the water outlet end of the first check valve 15 is connected with the water inlet end of the first water outlet gate valve 17 through a pipeline, the first water outlet gate valve 17 is also connected through flange rings at two ends, and the first water outlet gate valve 17 is used for finally controlling the outflow of the mixed liquid and playing a role in ensuring the final safety; the water outlet end of the first water outlet gate valve 17 is communicated with a clarification tank 18 through a pipeline.

Further, a pressure gauge 16 is connected between the first check valve 15 and the first water outlet gate valve 17.

As described above, the buffer elbow of the pressure gauge 16 is connected to the pipe via the nut, and is used for measuring the liquid pressure;

further, the dosing barrel 1 is placed on the step 2, and the step 2 is formed by welding concrete or steel pipes; the medicine adding barrel 1 is lifted by the step 2, so that the medicine liquid can smoothly flow out under the action of gravity;

the top opening of the medicine adding barrel 1 is covered with an upper cover. The upper cover is in a pit shape, and the upper cover covers the medicine adding barrel 1, so that other objects are prevented from falling into the medicine adding barrel, and the upper cover can be taken down when liquid medicine needs to be added; the medicine adding barrel 1 and the upper cover are welded by stainless steel plates;

further, the first outlet valve 3 and the second outlet valve 6 are manual ball valves. The manual ball valve comprises a valve body, a ball body, a sealing ring, a valve rod and a driving device, and belongs to the prior art;

furthermore, the material of the float valve 5 is plastic. The plastic material is prevented from being corroded by the liquid medicine for a long time, and the service life can be prolonged; the float valve 5 comprises a lever, a hollow float ball, a piston and a rubber gasket;

further, the first inlet valve 9 is an electric control valve. The valve is driven by receiving DCS signals to change the sectional area between the valve core and the valve seat so as to control the flow of the medicament.

Further, the second inlet valve 12 and the first outlet gate valve 17 are gate valves, and the moving direction of the gate valves is perpendicular to the water flow direction. And fully opening or fully closing the action pipeline.

In the specific implementation process, a first outlet valve 3 of a medicine adding barrel 1 is opened, the medicine adding barrel 1 is arranged above a step 2, medicine liquid prepared in the medicine adding barrel 1 can flow into a medicine metering barrel 4 through a ball float valve 5 under the action of gravity, the ball float valve 5 consists of a lever, a hollow floating ball, a piston and a rubber gasket, one end of the lever is connected with the hollow floating ball, the other end of the lever is connected with the piston, the rubber gasket with good sealing performance is installed on the piston, and the hollow floating ball can drive the piston to open and close along with the rising and falling of the water level, so that the purpose of automatically controlling the water level of the medicine liquid according to the requirement is achieved;

the motor 14 is started to drive the water taking pump 13 to work, raw water can be extracted through the water taking pipe 10, meanwhile, the first outlet valve 3 and the first inlet valve 9 on the medicine adding pipe 8 are opened, medicine liquid can be extracted to the venturi pipe 11 to be mixed with the raw water due to negative pressure at the reducing pipe of the venturi pipe 11, vacuum negative pressure generated when the raw water passes through the venturi pipe 11 can enable the sucked medicine liquid quantity to be in direct proportion to the extracted raw water quantity, the DCS carries out logic analysis and extraction through water quality data at the water taking pipe 10 and the clarification tank 18 and extracts the indication number through the observation flow meter 7, the opening degree of the first inlet valve 9 can be adjusted to achieve the purpose of accurately controlling the medicine adding quantity, and finally, the mixed liquid of the raw water and the medicine liquid is sent to the clarification tank 18 through the first check valve 15, the pressure gauge 16 and the first water outlet gate valve 17;

the whole process is simple, safe and reliable, convenient to maintain, free of additional power input, and capable of adjusting the dosage according to the change of the water quality of raw water at different periods throughout the year, so that low-cost and energy-consumption-free operation is realized.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, refer to the orientation or positional relationship as shown in the drawings, or as would be conventionally found in use of the products of the present invention, or as would be conventionally understood by one skilled in the art, and are used merely for convenience in describing and simplifying the utility model, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be understood broadly, for example, as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected;

the above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: equivalent changes made according to the structure, shape and principle of the utility model shall be covered by the protection scope of the utility model.

Claims

1. The utility model provides a charge device which characterized in that: the automatic dosing device comprises a dosing barrel, wherein the bottom of the dosing barrel is connected with a first outlet valve, the first outlet valve is communicated with a dosing barrel through a pipeline, a ball float valve is installed in the dosing barrel, the bottom of the dosing barrel is connected with a second outlet valve, the outflow end of the second outlet valve is connected with a flowmeter, the outflow end of the flowmeter is connected with a first inlet valve through a dosing pipe, the outflow end of the first inlet valve is connected with a medicine inlet of a Venturi tube, and a water inlet of the Venturi tube is connected with a water taking pipe;

the water taking pump is also included, and the rotating shaft end of the water taking pump is connected with a motor; the water inlet end of the water taking pump is connected with a second inlet valve, the second inlet valve is communicated with the medicine outlet of the Venturi tube, the water outlet end of the water taking pump is connected with a first check valve, the water outlet end of the first check valve is connected with the water inlet end of a first water outlet gate valve through a pipeline, and the water outlet end of the first water outlet gate valve is communicated with the clarification tank through a pipeline.

2. The dosing device of claim 1, wherein: a pressure gauge is connected between the first check valve and the first water outlet gate valve.

3. The medicated device of claim 1, wherein: the dosing barrel is placed on a step, and the step is formed by welding concrete or steel pipes;

the top opening of the medicine adding barrel is covered with an upper cover.

4. The dosing device of claim 1, wherein: the first outlet valve and the second outlet valve are manual ball valves.

5. The medicated device of claim 1, wherein: the material of the ball float valve is plastic.

6. The medicated device of claim 1, wherein: the first inlet valve is an electrically operated regulator valve.

7. The medicated device of claim 1, wherein: the second inlet valve and the first water outlet gate valve are gate valves, and the movement direction of the gate plates is vertical to the water flow direction.