CN217392286U - Liquid adding system - Google Patents

Abstract

The application provides a liquid dosing system, including water pump, storage container, extraction element and blender. The water pump is used for conveying the first raw material. The storage container is provided with a cavity, and a second raw material is stored in the cavity. The extraction assembly is provided with a first inlet, a second inlet and a first outlet, the first inlet is communicated with the water pump through a liquid inlet pipe, and the second inlet is communicated with the storage container. The mixer has a third inlet and a second outlet, the third inlet is connected with the first outlet for mixing the first raw material and the second raw material. The spraying assembly is connected with the second outlet and is used for spraying the mixed liquid. Be different from prior art, above-mentioned technical scheme extracts the liquid in water pump and the storage container through the extraction element and carries together and mix toward the blender, can directly throw liquid at the throwing point, has avoided throwing the problem that the distance is overlength between throwing point and the pipeline and throw excessively.

Description

Liquid adding system

Technical Field

The application relates to the technical field of water treatment, in particular to a liquid adding system.

Background

Taking the example of adding hypochlorous acid into tap water, the hypochlorous acid is commonly used for disinfecting the tap water in current water plants. Since the hypochlorous acid concentration in the tap water is low, the hypochlorous acid needs to be pumped into a feeding port of the tap water by a water pump. When the adding point is far away from the pump room, the adding pipeline is too long, the adding quantity is often unstable, and the potential threat to the health of residents is caused.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, it is desirable to provide a technical solution for quantitatively adding liquid, so as to solve the problem of unstable adding amount caused by too long adding point in the prior art.

In order to achieve the above object, the present application provides a liquid adding system, comprising:

the water pump is used for conveying the first raw material;

the storage container is provided with a cavity, and a second raw material is stored in the cavity;

the extraction assembly is provided with a first inlet, a second inlet and a first outlet, the first inlet is communicated with the water pump through a liquid inlet pipe, and the second inlet is communicated with the material storage container;

the mixer is provided with a third inlet and a second outlet, and the third inlet is connected with the first outlet and is used for mixing the first raw material and the second raw material;

and the spraying assembly is connected with the second outlet and is used for spraying the mixed liquid.

Be different from prior art, above-mentioned technical scheme passes through water pump transport first raw materials to extract the second raw materials in the stock solution container through the extraction element, send first raw materials and second raw materials to the blender together and mix. So set up, can directly throw the feeder apparatus with liquid and install and throw and add in the finished product pond of adding the point, avoided adding the point and pump house apart from long-range influence the problem of adding the volume, easy to assemble and maintenance.

In some embodiments, the liquid inlet pipe comprises a first liquid inlet pipe section and a plurality of second liquid inlet pipe sections.

One end of the first liquid inlet pipe section is communicated with the water pump, and the other end of the first liquid inlet pipe section is communicated with the second liquid inlet pipe section;

one end of the second liquid inlet pipe section is communicated with the first liquid inlet pipe section, and the other end of the second liquid inlet pipe section is communicated with the first inlet;

the extraction assemblies are arranged on the periphery of the first liquid inlet pipe section in a surrounding mode.

In some embodiments, said extraction assembly is connected to at least one said mixer, one said mixer being connected to at least one said jetting assembly; the spraying direction of the spraying component connected with different mixers is different.

In some embodiments, the magazine comprises:

a first pipe section, the first pipe section being a closed loop pipe section;

and one end of the second pipe section is communicated with the first pipe section, and the other end of the second pipe section is communicated with the second inlet of the extraction assembly.

In some embodiments, the number of the extraction assemblies and the number of the second pipe sections are plural, the second pipe sections being disposed at an inner periphery of the first pipe sections.

In some embodiments, a control valve is disposed on the second pipe segment.

In some embodiments, the first pipe section and the second inlet are located at the same height, and the mixer, the water pump and the extraction assembly are located within a projected area of the first pipe section.

In some embodiments, the spray assembly comprises a spray conduit and at least one spray head;

one end of the injection pipeline is communicated with the second outlet, the other end of the injection pipeline is connected with the spray head, and the spray head is connected with the injection pipeline in a rotatable mode.

In some embodiments, the extraction component comprises:

the diffuser pipe is connected with the liquid inlet pipe through the first inlet;

and the nozzle is connected with the diffuser pipe and extends into the negative pressure chamber.

In some embodiments, a plurality of helical blades are disposed within the mixer, and a plurality of apertures are disposed on the helical blades.

The above description of the present invention is only an overview of the technical solutions of the present application, and in order to make the technical solutions of the present application more clearly understood by those skilled in the art, further, the present invention can be implemented according to the contents described in the text and the drawings of the present application, and in order to make the above objects, other objects, features, and advantages of the present application more easily understood, the following description will be made in conjunction with the detailed description of the present application and the drawings.

Drawings

The drawings are only for purposes of illustrating the principles, implementations, applications, features, and effects of particular embodiments of the present application, as well as others related thereto, and are not to be construed as limiting the application.

In the drawings of the specification:

FIG. 1 is a front view of a liquid dosing system according to an embodiment of the present application;

FIG. 2 is a top view of a liquid dosing system according to an embodiment of the present application;

FIG. 3 is a schematic illustration of a portion of a fluid dosing system according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a liquid dosing system according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of an extraction assembly according to an embodiment of the present application.

The reference numerals referred to in the above figures are explained below:

1. a water pump;

2. the device comprises a storage container 21, a first pipe section 22, a second pipe section 23 and a control valve;

3. an extraction assembly, 31, a first inlet, 32, a second inlet, 33, a first outlet;

4. a mixer 41, a third inlet 42, a second outlet 43, a helical blade;

5. a liquid inlet pipe 51, a first liquid inlet pipe section 52, a second liquid inlet pipe section,

6. injection assembly, 61, injection pipe, 62, shower nozzle.

Detailed Description

In order to explain in detail possible application scenarios, technical principles, practical embodiments, and the like of the present application, the following detailed description is given with reference to the accompanying drawings in conjunction with the listed embodiments. The embodiments described herein are merely for more clearly illustrating the technical solutions of the present application, and therefore, the embodiments are only used as examples, and the scope of the present application is not limited thereby.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or related to other embodiments specifically defined. In principle, in the present application, the technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution as long as there is no technical contradiction or conflict.

Unless defined otherwise, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the use of relational terms herein is intended only to describe particular embodiments and is not intended to limit the present application.

In the description of the present application, the term "and/or" is a expression for describing a logical relationship between objects, indicating that three relationships may exist, for example, a and/or B, indicating that: there are three cases of A, B, and both A and B. In addition, the character "/" herein generally indicates that the former and latter associated objects are in a logical relationship of "or".

In this application, terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

Without further limitation, in this application, the use of "including," "comprising," "having," or other similar expressions in phrases and expressions of "including," "comprising," or "having," is intended to cover a non-exclusive inclusion, and such expressions do not exclude the presence of additional elements in a process, method, or article that includes the recited elements, such that a process, method, or article that includes a list of elements may include not only those elements but also other elements not expressly listed or inherent to such process, method, or article.

As is understood in the "review guidelines," in this application, the terms "greater than," "less than," "more than," and the like are to be understood as excluding the number; the expressions "above", "below", "within" and the like are understood to include the present numbers. Furthermore, the description of embodiments herein of the present application of the term "plurality" means more than two (including two), and expressions relating to "plurality" similar thereto are also to be understood, such as "plurality", etc., unless explicitly defined otherwise.

In the description of the embodiments of the present application, spatially relative expressions such as "central," "longitudinal," "lateral," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used, and the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the specific embodiments or drawings and are only for convenience of describing the specific embodiments of the present application or for the convenience of the reader, and do not indicate or imply that the system or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation and therefore should not be construed as limiting the embodiments of the present application.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured," and "disposed" used in the description of the embodiments of the present application are to be construed broadly. For example, "connected" may be a fixed connection, a removable connection, or an integral arrangement; it can be mechanical connection, electrical connection, and communication connection; they may be directly connected or indirectly connected through an intermediate; which may be communication within two elements or an interaction of two elements. Specific meanings of the above terms in the embodiments of the present application can be understood by those skilled in the art to which the present application belongs according to specific situations.

Taking the example of adding hypochlorous acid into tap water, the hypochlorous acid is commonly used for disinfecting the tap water in current tap water plants. Since the hypochlorous acid concentration in the tap water is low, the hypochlorous acid needs to be pumped into a feeding port of the tap water by using the water pump 1. The dosing is carried out by a metering pump in a conventional way, the dosing amount of the metering pump is small, about 2ppm, and the price is high. Particularly, when the adding point is far away from the pump room, the adding pipeline is too long and is not in a certain level, so that the phenomena that the pipeline is not full and the adding amount is unstable can be caused. When the adding of the liquid adding system is finished, the concentration of the adding port is excessive, so that the halogenated hydrocarbon exceeds the standard, and potential threat to the health of residents is caused.

To achieve the above objective, referring to fig. 1-2, the present application provides a liquid dosing system, which includes a water pump 1, a storage container 2, an extraction assembly 3, and a mixer 4. The water pump 1 is used to convey the first raw material. The storage container 2 is provided with a cavity, and the second raw material is stored in the cavity. The extraction assembly 3 is provided with a first inlet 31, a second inlet 32 and a first outlet 33, the first inlet 31 is communicated with the water pump 1 through a liquid inlet pipe 5, and the second inlet 32 is communicated with the storage container 2. The mixer 4 has a third inlet 41 and a second outlet 42, the third inlet 41 being connected to the first outlet 33 for mixing the first and second raw materials. The spray assembly 6 is connected to the second outlet 42 for spraying the mixed liquid.

The water pump 1 is a machine that conveys or pressurizes a liquid. It transfers the mechanical energy of the prime mover or other external energy to the liquid, causing the liquid energy to increase. The water pump 1 is used for conveying the first raw material and may be a metering pump, a deep well pump, or the like. In some embodiments, the first feedstock is tap water.

The storage container 2 is provided with a cavity, and the second raw material is stored in the cavity. The magazine 2 may be tubular or barrel-shaped. The material of the storage container 2 may be selected according to the properties of the second raw material. The second feedstock may be a gas or a liquid. In some embodiments, the second material is a sodium hypochlorite solution.

The extraction assembly 3 is a component for extracting the first material conveyed by the water pump 1 and the second material in the storage container 2 together. As shown in fig. 3, in some embodiments, the upper part of the extraction assembly 3 is provided with a first inlet 31, the side of the extraction assembly 3 is provided with a second inlet 32, and the lower end of the extraction assembly 3 is provided with a first outlet 33.

The mixer 4 is a component that mixes the extracted first raw material and second raw material. In some other embodiments, the mixer 4 is a line mixer 4. The pipeline mixer 4 is used for enabling the fluid to pass through a certain component or a mixing element to achieve the purpose of average mixing when the fluid flows in the pipeline, and is a mixer 4 without any mechanical moving part. The pipeline mixer 4 commonly used in industry has several types such as static baffle type, orifice type, three-way type mixer 4, etc. The material of the pipeline mixer 4 is glass fiber reinforced plastic, carbon steel and stainless steel.

The spray assembly 6 is a member having a spraying function for spraying the mixed liquid into the water bath so that the mixed solution is further mixed with the first raw material. In some embodiments, the spray assembly 6 has a pressure that utilizes high pressure to rapidly spray the liquid with extremely high kinetic energy.

As shown in fig. 4, in specific use, the first raw material is pumped out by the water pump 1, and enters the first inlet 31 of the extraction assembly 3 through the liquid inlet pipe 5. The second inlet 32 of the extraction assembly 3 is connected to the magazine 2, and the second material enters the extraction assembly 3 through the second inlet 32, flows out of the first outlet 33 together with the first material, and enters the mixer 4 through the third inlet 41 for uniform mixing. The mixed liquid flows out of the second outlet 42, enters the spray module 6, and is sprayed out of the spray module 6 as small droplets to be mixed with the surrounding environment.

Taking the example of adding hypochlorous acid into tap water, when in specific use, the liquid adding system provided by the embodiment can be directly installed in a finished product water tank. Tap water is pumped out by the water pump 1 and enters the first inlet 31 of the extraction assembly 3 through the liquid inlet pipe 5. The second inlet 32 of the extraction module 3 is connected to the storage container 2, and hypochlorous acid enters the extraction module 3 through the second inlet 32, flows out through the first outlet 33 together with tap water, and enters the mixer 4 through the third inlet 41 to be uniformly mixed. The mixed liquid flows out of the second outlet 42 into the spray module 6 and is sprayed out of the spray module 6 as small droplets to be mixed with the surrounding environment.

Be different from prior art, above-mentioned technical scheme passes through water pump 1 and carries first raw materials to extract the second raw materials in the stock solution container through extraction element 3, send first raw materials and second raw materials to blender 4 together and mix. So set up, can directly throw liquid throwing system installation and carry out liquid with throwing in throwing the finished product pond of adding the point, avoided adding the problem that the point is far away from the pump house and influence the volume of throwing, easy to assemble and maintenance.

In some other embodiments, the liquid inlet pipe 5 comprises a first liquid inlet pipe section 51 and a plurality of second liquid inlet pipe sections 52. One end of the first liquid inlet pipe section 51 is communicated with the water pump 1, and the other end is communicated with the second liquid inlet pipe section 52. One end of the second liquid inlet pipe section 52 is communicated with the first liquid inlet pipe section 51, and the other end is communicated with the first inlet 31. The extraction assembly 3 is provided in plurality and is arranged around the periphery of the first liquid inlet pipe section 51.

One end of the first liquid inlet pipe section 51 is communicated with the water pump 1, and the other end is communicated with the second liquid inlet pipe section 52. The length of the first liquid inlet pipe section 51 can be set to be long, so that the first liquid inlet pipe section can conveniently extend into a finished product water pool. The number of the second liquid inlet pipe sections 52 is multiple, and the second liquid inlet pipe sections 51 are used for dividing the first liquid inlet pipe sections 51, so that the first raw material in the first liquid inlet pipe sections 51 uniformly enters each extraction assembly 3. The number of the extracting assemblies 3 is a plurality of, and the extracting assemblies are arranged around the periphery of the first liquid inlet pipe section 51, so that the second raw materials can be conveniently extracted simultaneously, and the extracting and mixing efficiency is improved.

In some other embodiments, the extraction assembly 3 is connected to at least one mixer 4, and one mixer 4 is connected to at least one jetting assembly 6. The spraying direction of the spraying assemblies 6 connected with different mixers 4 is different.

The provision of a plurality of mixers 4 operating simultaneously further improves the mixing of the first and second raw materials. One mixer 4 can be connected with one injection assembly 6 and can also be connected with a plurality of injection assemblies 6, and the more injection assemblies 6 are connected, the larger the injection range is, so that the first raw material and the second raw material are uniformly mixed. The spraying direction of the spraying assembly 6 connected with different mixers 4 is different, the mixed solution can be sprayed outwards from a plurality of angles, and the spraying range and the spraying effect are better. In some embodiments, the injection direction of multiple injection assemblies 6 connected to the same mixer 4 may also be different. So set up, improved the mixed effect of first raw materials and second raw materials, enlarged injection assembly 6's injection scope for the second raw materials disperses in first raw materials uniformly.

In some other embodiments, the magazine 2 comprises a first tube section 21, a second tube section 22. The first pipe section 21 is a closed loop pipe section. The second pipe section 22 communicates at one end with the first pipe section 21 and at the other end with the second inlet 32 of the extraction assembly 3.

The first pipe section 21 is a pipe section for storing the second material and providing the second material to the extraction assembly 3. The first pipe section 21 is a closed loop pipe section, which may be a square closed loop, a circular closed loop, an irregular closed loop, or the like. In some embodiments, the first pipe section 21 is provided with an opening for feeding the second material to the first pipe section 21. The second pipe section 22 is in communication with the first pipe section 21 at one end and with the second inlet 32 of the extraction assembly 3 at the other end for transporting the second material stored in the first pipe section 21 to the extraction assembly 3. The provision of a closed loop pipe section can provide a plurality of extraction modules 3 with the second feedstock simultaneously.

In some other embodiments, the number of extraction assemblies 3 and the number of second tubular segments 22 are plural, the second tubular segments 22 being arranged at the inner periphery of the first tubular segments 21. The number of the extraction assembly 3 and the second pipe section 22 is plural, and one extraction assembly 3 may communicate with one second pipe section 22, and may communicate with a plurality of second pipe sections 22. The second pipe section 22 is arranged on the inner periphery of the first pipe section 21, and the extraction assembly 3 is also arranged on the inner periphery of the first pipe section 21, so that the space is fully utilized, the length required by the second pipe section 22 is reduced, and the material is saved.

In some other embodiments, a control valve 23 is provided on the second pipe section 22. The control valve 23 is used to control the flow rate of the second segment 22, and thus the amount of the second material, and further influence the concentration of the liquid after the first material and the second material are mixed. The control valve 23 may be a throttle valve. A throttle valve is a valve that controls the flow of fluid by changing the throttle section or throttle length. The throttle valve and the one-way valve are connected in parallel to form the one-way throttle valve. The throttle valve and the one-way throttle valve are simple flow control valves.

In some other embodiments, the first pipe section 21 is located at the same height as the second inlet 32, and the mixer 4, the water pump 1 and the extraction assembly 3 are located within the projection area of the first pipe section 21.

The first pipe section 21 is located at the same height as the second inlet 32 to facilitate the extraction of the second material from the second inlet 32 by the extraction assembly 3. The mixer 4, the water pump 1 and the extraction assembly 3 are located within the projected area of the first pipe section 21, enabling the volume occupied by the liquid dosing system provided by this embodiment to be as small as possible. By the arrangement, the space is fully and effectively utilized, the space required by the liquid adding system is reduced, the transportation and the storage are convenient, and the device can also adapt to more construction and installation environments.

In some other embodiments, the spray assembly 6 includes a spray tube 61 and at least one spray head 62. The injection pipe 61 has one end communicating with the second outlet 42 and the other end connected to the spray head 62, and the spray head 62 is rotatably connected to the injection pipe 61.

In some embodiments, there is also at least one number of injection conduits 61. The injection pipe 61 is made of a high pressure resistant material, and the high pressure nozzle 62 can be used as the nozzle 62. So set up for the liquid droplet that jetting subassembly 6 jetted is less, can mix with the surrounding environment fast. The spray head 62 is rotatably connected to the spray pipe 61, and the spray direction of the spray head 62 can be adjusted to expand the spray range covered by the spray assembly 6 as much as possible.

In some other embodiments, as shown in fig. 5, the extraction assembly 3 comprises a diffuser tube, a nozzle. The diffuser pipe is connected to the inlet pipe 5 via a first inlet 31. The nozzle is connected with the diffuser pipe and extends into the negative pressure chamber.

When the first raw material flows through the diffuser pipe from the first inlet 31, the flow rate of the first raw material is increased as the cross-sectional area of the diffuser pipe is decreased, and the first raw material is injected into the negative pressure chamber at a high speed at the injection port. The higher the flow rate, the lower the pressure of the liquid, and thus a negative pressure is formed in the negative pressure chamber. The upper end of the negative pressure chamber is connected with the nozzle, the lower end of the negative pressure chamber is communicated with the first outlet 33, and the side surface of the negative pressure chamber is provided with a second inlet 32. As the sub-atmospheric chamber is under sub-atmospheric pressure, the second material at the second inlet 32 is drawn into the sub-atmospheric chamber, exits the first outlet 33 together with the first material, and enters the mixer 4 through the third inlet 41 for mixing. In some embodiments, the extraction assembly 3 may be a water ejector.

In some other embodiments, as shown in fig. 3, a plurality of helical blades 43 are provided within the mixer 4, with a plurality of openings provided in the helical blades 43. In some embodiments, the helical blades are twisted by 180 °, the helical direction can be left-handed or right-handed, and the helical blades 43 in two adjacent sections rotate in opposite directions and are 90 ° out of phase. The helical blades 43 are fixed in the pipe, through which the fluid is subjected to a change of direction, presenting a turbulent phenomenon, thus improving the mixing effect.

In order for the reader to more intuitively understand certain embodiments of the present application, the following examples are also provided for the reader's reference.

The system adopts the Venturi tube principle, and firstly, water at a feeding point is conveyed to a water ejector through a liquid inlet pipe 5 by a deep well pump. When water flows through the diffuser pipe, the cross-sectional area is reduced due to the existence of the diffuser pipe, so that the flow velocity is increased, the water is sprayed out from the nozzle at a high velocity, and according to Bernoulli's law, the pressure caused by the fluid with high flow velocity is reduced, and negative pressure is formed in the negative pressure chamber. The water ejector draws the second feedstock from the second inlet 32 through the control valve 23. After the second raw material enters the negative pressure chamber, the water at the feeding point of the throat is mixed and discharged from the first outlet 33 to finish the extraction. Then the liquid enters a mixer 4 for further mixing, and finally the liquid is conveyed back to a feeding point through uniformly distributed and dispersed spraying assemblies 6 to finish the feeding of the second raw material.

According to the technical scheme, a gradual adding mode is adopted, water is pumped up through a deep well pump to be mixed with hypochlorous acid, the mixed liquid is sprayed out through the spraying assembly 6 and is arranged at an adding port of tap water, and the whole system is directly inserted into a finished product water tank. The spray assembly 6 can be rotated and the mixing in the water will be more uniform.

Finally, it should be noted that, although the above embodiments have been described in the text and drawings of the present application, the scope of the patent protection of the present application is not limited thereby. All technical solutions which are generated by replacing or modifying the equivalent structure or the equivalent flow according to the contents described in the text and the drawings of the present application, and which are directly or indirectly implemented in other related technical fields, are included in the scope of protection of the present application.

Claims (9)

1. A liquid dosing system, comprising:

the water pump is used for conveying the first raw material;

the storage container is provided with a cavity, and a second raw material is stored in the cavity;

the extraction assembly is provided with a first inlet, a second inlet and a first outlet, the first inlet is communicated with the water pump through a liquid inlet pipe, and the second inlet is communicated with the material storage container;

the mixer is provided with a third inlet and a second outlet, and the third inlet is connected with the first outlet and is used for mixing the first raw material and the second raw material;

and the spraying assembly is connected with the second outlet and is used for spraying the mixed liquid.

2. The liquid dosing system of claim 1, wherein the liquid inlet line includes a first liquid inlet line segment and a plurality of second liquid inlet line segments;

one end of the first liquid inlet pipe section is communicated with the water pump, and the other end of the first liquid inlet pipe section is communicated with the second liquid inlet pipe section;

one end of the second liquid inlet pipe section is communicated with the first liquid inlet pipe section, and the other end of the second liquid inlet pipe section is communicated with the first inlet;

the extraction assemblies are arranged on the periphery of the first liquid inlet pipe section in a surrounding mode.

3. The liquid dosing system of claim 1 or 2, wherein the extraction assembly is connected to at least one of the mixers, one of the mixers being connected to at least one of the spray assemblies; the spraying direction of the spraying component connected with different mixers is different.

4. The liquid dosing system of claim 1, wherein the holding vessel comprises:

a first pipe section, the first pipe section being a closed loop pipe section;

and one end of the second pipe section is communicated with the first pipe section, and the other end of the second pipe section is communicated with the second inlet of the extraction assembly.

5. The liquid dosing system of claim 4, wherein the number of extraction assemblies and the number of second tube segments are plural, the second tube segments being disposed about the inner periphery of the first tube segments.

6. The liquid dosing system of claim 4, wherein the second tube segment has a control valve disposed thereon.

7. The liquid dosing system of claim 4, wherein the first tube segment is at the same elevation as the second inlet, and the mixer, the water pump, and the extraction assembly are located within a projected area of the first tube segment.

8. The liquid dosing system of claim 1, wherein the extraction assembly comprises:

the diffuser pipe is connected with the liquid inlet pipe through the first inlet;

and the nozzle is connected with the diffuser pipe and extends into the negative pressure chamber.

9. The liquid dosing system of claim 1 wherein a plurality of helical vanes are disposed within the mixer, the helical vanes having a plurality of openings disposed therein.

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