Micro-bubble air dissolving device

Abstract

The utility model discloses a microbubble air dissolving device which comprises a water inlet pipe, a pressure pump, an air inlet pipe, a Venturi pipe, an air-water mixing pipe, an air dissolving reactor and an air dissolving water outlet pipe, the water inlet pipe is connected with an inlet of the pressure pump, the pressure pump is communicated with an inlet of the venturi tube, a side inlet of the venturi tube is communicated with the gas inlet pipe, and the venturi tube is communicated with the dissolved gas reactor through the gas-water mixing pipe; the dissolved gas reactor comprises an outer shell, an inner barrel arranged in the outer shell and an inlet jet pipe nozzle; and a pressure buffer area is formed between the inner barrel and the outer shell. The utility model has the beneficial effects that the inner barrel body is designed to form a pressure buffer area, and after gas-water mixed liquid subjected to primary treatment enters the pressure buffer area, the gas can be further dissolved in the liquid due to the change of pressure to form fine bubbles with concentrated diameters, so that the gas dissolving efficiency is improved, and the service life of the gas-water separator is prolonged. The problems that in the prior art, the gas dissolving efficiency is low, the diameter of bubbles is large, and distribution is not concentrated are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to water treatment technical field, and specifically relates to a microbubble dissolved gas device. BACKGROUND

[0002] In the field of water treatment technology, dissolved gas is needed when the air flotation device performs solid-liquid separation, and the bubble dissolved gas efficiency and bubble diameter have an important influence on the solid-liquid separation efficiency. At the same time, in the water treatment process of disinfection, oxidation, decolorization and the like, the ozone dissolved gas effect is directly related to the water purification effect and the ozone tail gas overflow situation.

[0003] At present, the traditional dissolved gas process usually adopts air compressor to supply air, and charges air through a diffuser pipe or a diffuser disc, as mentioned in Chinese patent CN117550729B "A dissolved gas system for water treatment" and Chinese patent CN218465628U "High-pressure dissolved gas type oxygenation system". However, this method has the following obvious defects: the diameter of the generated bubbles is large and the distribution is not concentrated, the dissolved gas efficiency is low, there are invalid bubbles, when used for ozone dissolved gas, tail gas will also be generated, which needs to be treated additionally, increasing the treatment cost, and possibly causing potential threat to the environment. Therefore, it is particularly necessary to develop a dissolved gas technology with high dissolved gas efficiency and provide a dissolved gas device that meets the needs of water treatment technology. SUMMARY

[0004] The utility model discloses a microbubble dissolved gas device, which aims at solving the problem of low dissolved gas efficiency in the prior art.

[0005] The utility model discloses the technical scheme: a microbubble dissolved gas device, including water inlet pipe, pressure pump, air inlet pipe, venturi, gas water mixing pipe, dissolved gas reactor and dissolved gas outlet pipe, water inlet pipe is linked with the entrance of pressure pump, and the outlet of pressure pump is communicated with the entrance of venturi through the pipeline, and the side entrance of venturi is communicated with air inlet pipe, and the outlet of venturi is communicated with the entrance of dissolved gas reactor through gas water mixing pipe, and the bottom outlet of dissolved gas reactor is communicated with dissolved gas outlet pipe,

[0006] The dissolved gas reactor comprises an outer shell, an inner cylinder arranged in the outer shell and an inlet jet pipe nozzle.

[0007] According to the above scheme, the inner cylinder is a conical structure with a large upper opening and a small lower opening.

[0008] According to the scheme, the inlet jet nozzle comprises a vertical nozzle section and a curved nozzle section; the upper end of the vertical nozzle section extends out of the outer shell and communicates with the outlet of the air-water mixing pipe, the lower end of the vertical nozzle section extends into the inner cylinder and communicates with the inlet end of the curved nozzle section, the outlet end of the curved nozzle section extends to the inner wall of the inner cylinder, and the outlet end axis of the curved nozzle section is adapted to the tangential direction of the inner wall of the inner cylinder.

[0009] According to the scheme, the air inlet pipe is an air pipe.

[0010] According to the scheme, the pressurizing pump is a low-pressure pump.

[0011] According to the scheme, the outlet pressure of the pressurizing pump is 0.18-0.20 MPa.

[0012] According to the scheme, the outer shell is cylindrical.

[0013] According to the scheme, the lower opening of the inner cylinder is higher than the inner bottom of the outer shell.

[0014] According to the scheme, the lower part of the pressure buffer zone is provided with a dissolved air outlet interface communicating with the dissolved air outlet pipe.

[0015] According to the scheme, the air inlet pipe is an ozone pipe.

[0016] The beneficial effects of the present application are as follows:

[0017] 1. In the present application, the inner cylinder of the dissolved air reactor forms a pressure buffer zone, and after the air-water mixture in the inner cylinder is preliminarily treated and enters the pressure buffer zone, the pressure changes, which can promote the further dissolution of gas in the liquid, form fine and diameter-concentrated bubbles, and improve the dissolved air efficiency, solving the problems of low dissolved air efficiency, large bubble diameter and uneven distribution in the prior art.

[0018] 2. In the present application, the inner cylinder is designed to be conical, which cooperates with the inlet jet nozzle to strengthen the effects of rotational centrifugal separation and strong cutting, so that the gas is more uniformly dispersed in the liquid to form finer bubbles, improving the dissolved air effect.

[0019] 3. In the present application, the outlet end of the inlet jet nozzle of the dissolved air reactor is tangentially designed, the air-water mixture enters the conical inner cylinder of the dissolved air reactor at a high speed in a tangential direction, which enhances the rotational flow effect of the mixture, promotes the sufficient contact and dissolution of the gas and the liquid, and improves the dissolved air efficiency.

[0020] 4. In the present application, the Venturi tube is used for negative pressure air suction, without the need for additional pressurization of air or ozone, so that high-efficiency air suction can be realized, the device structure and operation process are simplified, and the cost is reduced.

[0021] 5、The utility model discloses a high -efficient gas dissolving of bubble and small feature can better adsorb and carry the suspended particle in water, can improve the solid -liquid separation water treatment efficiency after cooperation current air floatation device, effectively remove the impurity such as algae, suspended solid in water body, improve water quality.

[0022] 6、The utility model is used for ozone gas dissolving to purify and treat waste water, and does not produce invalid bubble, improves the utilization rate of ozone, avoids the harm of ozone overflow to environment and human body, realizes the dual goal of environmental protection and high efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is structural schematic diagram of example one in the utility model.

[0024] Figure 2 It is structural schematic diagram of gas dissolving reactor in example one.

[0025] In the drawing: 1, water inlet pipe;2, pressure pump;3, air inlet pipe;4, venturi tube;5, gas -water mixing pipe;6, gas dissolving reactor;7, gas dissolving water outlet pipe;6.1, inlet jet nozzle;6.2, outer shell;6.3, inner cylinder;6.4, pressure buffer zone;6.5, gas dissolving water outlet. DETAILED DESCRIPTION

[0026] In order to better understand the utility model, the utility model is further described below in combination with the drawings and specific embodiments.

[0027] As Figure 1 The microbubble gas dissolving device mainly used for water treatment air floatation solid -liquid separation or ozone oxidation, which comprises a water inlet pipe 1, a pressure pump 2, an air inlet pipe 3, a venturi tube 4, a gas -water mixing pipe 5, a gas dissolving reactor 6 and a gas dissolving water outlet pipe 7;The water inlet pipe 1 is connected with the inlet of the pressure pump 2, the outlet of the pressure pump 2 is communicated with the inlet of the venturi tube 4 through a pipeline, the side inlet of the venturi tube 4 is communicated with the air inlet pipe 3, the outlet of the venturi tube 4 is communicated with the inlet of the gas dissolving reactor 6 through the gas -water mixing pipe 5, and the bottom outlet of the gas dissolving reactor 6 is communicated with the gas dissolving water outlet pipe 7.

[0028] The gas dissolving reactor 6 comprises an outer shell 6.2, an inner cylinder 6.3 arranged in the outer shell 6.2 and an inlet jet nozzle 6.1;The inner cylinder 6.3 is a conical structure with a large upper opening and a small lower opening, and the lower part of the inner cylinder 6.3 is open;The pressure buffer zone 6.4 is formed between the inner cylinder 6.3 and the outer shell 6.2;The inlet of the gas dissolving water outlet pipe 7 is communicated with the pressure buffer zone 6.4;The inlet of the inlet jet nozzle 6.1 is communicated with the outlet of the gas -water mixing pipe 5, and the outlet of the inlet jet nozzle 6.1 extends to the inner cylinder 6.3.

[0029] In this invention, the air intake pipe 3 is an air pipe or an ozone pipe.

[0030] In this invention, the upper opening of the inner cylinder 6.3 can also be designed to be unclosed, and the lower opening of the inner cylinder 6.3 is higher than the inner bottom of the outer shell 6.2 (that is, a space is left between the lower opening of the inner cylinder 6.3 and the inner bottom of the outer shell 6.2 to form a pressure buffer zone 6.4). The gas and water in the gas-water mixing pipe 5 enter the inner cylinder 6.3 of the dissolved gas reactor 6 through the inlet jet nozzle 6.1, then enter the pressure buffer zone 6.4 below the inner cylinder 6.3, and finally flow out through the dissolved gas outlet pipe 7.

[0031] Preferably, the inlet jet nozzle 6.1 includes a vertical nozzle section and a curved nozzle section; the upper end of the vertical nozzle section extends out of the outer shell 6.2 and is connected to the outlet of the gas-water mixing pipe 5 (the two can be connected by a flange); the lower end of the vertical nozzle section extends into the inner cylinder 6.3 and is connected to the inlet end of the curved nozzle section; the outlet end of the curved nozzle section extends to the inner wall surface of the inner cylinder 6.3, and the axis of the outlet end of the curved nozzle section is adapted to the tangential direction of the inner wall of the inner cylinder 6.3.

[0032] In this invention, the tangential design of the outlet end of the bent nozzle section allows the gas-water mixture to enter the inner cylinder 6.3 at high speed in a tangential direction.

[0033] Preferably, the booster pump 2 is a low-pressure pump with an outlet pressure of 0.18~0.2 MPa. In this invention, this low-pressure design not only meets the device's requirements for water flow pressure but also reduces the equipment's energy consumption and operating costs.

[0034] Preferably, the outer shell 6.2 is cylindrical.

[0035] Example 1

[0036] like Figure 1 The microbubble dissolved gas device shown includes a water inlet pipe 1, a pressure pump 2, a venturi tube 4, a gas-water mixing pipe 5, a dissolved gas reactor 6, and a dissolved gas outlet pipe 7, connected in sequence. The side inlet of the venturi tube 4 is connected to the air inlet pipe 3. The venturi tube 4 is used for negative pressure air intake, and the gas (such as air or ozone) in the air inlet pipe 3 does not need to be pressurized. Figure 2 As shown, the dissolved gas reactor 6 includes an inlet jet nozzle 6.1, an inner cylinder 6.3, and an outer shell 6.2. The outlet end of the inlet jet nozzle 6.1 has an arc-shaped tangential design. The outer shell 6.2 is cylindrical, and the inner cylinder 6.3 has a conical structure with a larger upper opening and a smaller lower opening. A pressure buffer zone 6.4 is formed between the outer wall of the inner cylinder 6.3 and the inner wall of the outer shell 6.2, and between the lower opening of the inner cylinder 6.3 and the inner bottom of the outer shell 6.2. The lower part of the pressure buffer zone 6.4 is provided with a dissolved gas outlet water interface 6.5 (which can be connected via a flange) that is connected to the dissolved gas outlet water pipe 7.

[0037] Example 2

[0038] The other configurations of this example are the same as those of example 1, except that the outlet pressure of the pressurizing pump 2 is 0.2 MP.

[0039] The working principle of the utility model is as follows: water enters the pressurizing pump 2 through the water inlet pipe 1 first, and the pressurized water flows through the venturi tube 4; the air or ozone in the air inlet pipe 3 is sucked from the side inlet of the venturi tube 4 and fully mixed with the water in the venturi tube 4 to form a gas-water mixture; the gas-water mixture then enters the gas-water mixing pipe 5, is further uniformly mixed, and then enters the inlet jet nozzle 6.1 of the gas dissolving reactor 6; the gas dissolving reactor 6 is the core component of the micro-bubble gas dissolving device, and is designed with a special nozzle and a two-layer cylinder structure; under low pressure, the gas-water mixture first passes through the inlet jet nozzle 6.1 and the conical inner cylinder body 6.3 together, the outlet end of the inlet jet nozzle 6.1 is designed tangentially, so that the gas-water mixture enters the conical inner cylinder body 6.3 of the gas dissolving reactor 6 at a high speed in a tangential direction, forming a strong rotational centrifugal force; under the action of the centrifugal force, the gas and the liquid are continuously separated and mixed, at the same time, the conical inner cylinder body 6.3 further strengthens the action, and the gas-water mixture is strongly cut off, so that the gas is divided into smaller bubbles; then, the preliminarily processed gas-water mixture enters the pressure buffer zone 6.4; in the pressure buffer zone 6.4, the pressure changes, which promotes the gas to be further dissolved in the liquid, and finally forms fine bubbles with concentrated diameters; the bubbles are discharged through the gas dissolving water outlet 6.5 and the gas dissolving water pipe 7, and are used for subsequent water treatment processes.

[0040] In the utility model, the gas dissolving reactor 6 is composed of the inlet jet nozzle 6.1, the conical inner cylinder body 6.3, and the pressure buffer zone 6.4 between the inner cylinder body 6.3 and the outer shell 6.2, and the parts work together to generate micro-bubbles; the outlet end of the inlet jet nozzle 6.1 is designed in an arc tangential direction, the outer shell 6.2 is cylindrical, and the inner cylinder body 6.3 is conical with a large upper part and a small lower part; the unique structure design enables the gas dissolving reactor 6 to achieve high-efficiency gas dissolving effect under low pressure.

[0041] According to multiple tests, the gas bubbles generated by the utility model have diameters concentrated in 45-50 um, which are smaller and more concentrated than the 50-100 um of conventional technology; when the bubbles are used in lake water purification treatment together with a flotation device, the flotation solid-liquid separation effect is good and stable, and the bubbles can effectively remove algae and the like in the water body, and obviously improve the water quality.

[0042] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0043] It should be pointed out finally that the above is only the preferred embodiment of the utility model, and is not used for limiting the utility model, although the utility model is described in detail with reference to the embodiment, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement is carried out to part of technical features, but any modification, equivalent replacement, improvement etc. within the spirit and principle of the utility model should be contained in the protection scope of the utility model.

Claims

1. A microbubble dissolved gas device, characterized by, The device comprises a water inlet pipe, a pressurizing pump, an air inlet pipe, a Venturi tube, an air-water mixing pipe, a dissolved air reactor and a dissolved air outlet pipe; the water inlet pipe is connected with the inlet of the pressurizing pump, the outlet of the pressurizing pump is communicated with the inlet of the Venturi tube through a pipe, the side inlet of the Venturi tube is communicated with the air inlet pipe, the outlet of the Venturi tube is communicated with the inlet of the dissolved air reactor through the air-water mixing pipe, and the bottom outlet of the dissolved air reactor is communicated with the dissolved air outlet pipe. The dissolved air reactor comprises an outer shell, an inner cylinder arranged in the outer shell and an inlet jet pipe nozzle; the lower part of the inner cylinder is open, and a pressure buffer zone is formed between the inner cylinder and the outer shell; the inlet of the dissolved air outlet pipe is communicated with the pressure buffer zone; the inlet of the inlet jet pipe nozzle is communicated with the outlet of the air-water mixing pipe, and the outlet of the inlet jet pipe nozzle extends to the inner cylinder.

2. The microbubble gas dissolving device according to claim 1, wherein The inner cylinder is a conical structure with a large upper opening and a small lower opening.

3. The microbubble gas dissolving device according to claim 1 or 2, wherein The inlet jet pipe nozzle comprises a vertical pipe nozzle section and a curved pipe nozzle section; the upper end of the vertical pipe nozzle section extends out of the outer shell and is communicated with the outlet of the air-water mixing pipe, the lower end of the vertical pipe nozzle section extends into the inner cylinder and is communicated with the inlet end of the curved pipe nozzle section, the outlet end of the curved pipe nozzle section extends to the inner wall surface of the inner cylinder, and the outlet end axis of the curved pipe nozzle section is adapted to the tangential direction of the inner wall of the inner cylinder.

4. The microbubble gas dissolving device according to claim 3, wherein The air inlet pipe is an air pipe.

5. The microbubble gas dissolving device according to claim 4, wherein The pressurizing pump is a low-pressure pump.

6. The microbubble gas dissolving device according to claim 5, wherein The outlet pressure of the pressurizing pump is 0.18-0.2 Mpa.

7. The microbubble gas dissolving device according to any one of claims 4 to 6, wherein The outer shell is a cylindrical shape.

8. The microbubble gas dissolving device according to claim 7, wherein The lower opening of the inner cylinder is higher than the inner bottom of the outer shell.

9. The microbubble gas dissolving device according to claim 7, wherein The lower part of the pressure buffer zone is provided with a dissolved air outlet interface communicated with the dissolved air outlet pipe.

10. The microbubble gas dissolving device according to claim 7, wherein The air inlet pipe is an ozone pipe.

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