Flash separation treatment method and system for inorganic waste liquid

Abstract

The present invention belongs to the technical field of inorganic waste liquid experimental equipment, and provides an inorganic waste liquid flash treatment method and system, wherein the inorganic waste liquid flash treatment system is an n-type or U-type structure, air and inorganic waste liquid are sent to a mixing chamber (1) for mixing to form a micro-granular gas-liquid mixture; the gas-liquid mixture enters a waste liquid flash treatment device (2) for flash evaporation treatment, so that the salt contained in the waste liquid is quickly separated to form waste gas including air, water vapor and salt; the waste gas after flash evaporation treatment enters a waste gas purification device (3) for purification treatment to obtain purified gas that meets emission standards, and is discharged through a fan (4). The present invention uses physical methods to treat waste liquid throughout the process, and no waste liquid is discharged during the treatment of inorganic waste liquid, the treatment efficiency is high, no additional treatment agent is required during the treatment process, and no other new pollutants that are difficult to treat are generated, and the unit waste treatment cost is low.

Description

Technical Field

[0001] The invention belongs to the technical field of inorganic waste liquid experimental equipment and relates to a flash separation treatment technology for inorganic waste liquid. Background Art

[0002] With the rapid development of science and technology in my country, the laboratories of universities, research institutes and enterprises are constantly expanding, and the types, number and scale of laboratories are also growing. Along with this comes the pollution problem caused by laboratory waste.

[0003] Laboratory waste mainly includes: solid waste, waste liquid, waste gas, noise and vibration, electromagnetic radiation, and biological pollutants such as viruses and pathogenic bacteria. University laboratory waste is highly toxic and hazardous, but the environmental protection department has not included it in the environmental protection detection items. Even if it is included, it is difficult to detect due to its small amount and easy dilution by domestic sewage.

[0004] Laboratory waste liquid mainly comes from the experimental research laboratories of various scientific research units and the scientific research and teaching laboratories of colleges and universities. Laboratory waste liquid has its own special properties, small amount, strong intermittent, high hazard, complex and variable composition. According to the properties of the main pollutants contained in the waste liquid, laboratory waste liquid can be divided into two categories: laboratory organic and inorganic waste liquid. Among them, laboratory inorganic waste liquid mainly contains heavy metals, heavy metal complexes, acids and alkalis, cyanides, sulfides, halogen ions and other inorganic ions, so if the laboratory inorganic waste liquid is not handled properly, it will cause very serious pollution to the environment.

[0005] At present, laboratory inorganic waste liquid is generally treated by chemical methods. The chemical method for treating inorganic waste liquid is complex, occupies a large area, consumes a large amount of consumables, emits a pungent odor during the treatment process, and produces a large amount of sludge and solid residue at the end of the treatment, which is difficult to handle. As a result, the overall chemical treatment equipment is inefficient and costly, and the odor emitted during the treatment process still has the disadvantage of causing great environmental pollution.

[0006] Therefore, there is an urgent need for a treatment method and equipment for laboratory inorganic waste liquid, which can efficiently treat laboratory inorganic waste liquid and make the treated gas meet the direct emission requirements of national standards, and has a small footprint, high treatment efficiency and low unit waste treatment cost. Summary of the invention

[0007] In view of the shortcomings of the prior art in the treatment of inorganic waste liquid, such as high cost, large floor space, low treatment efficiency and emission of irritating odor and environmental pollution during the treatment process, the present invention provides a flash treatment method and system for inorganic waste liquid, which can efficiently treat laboratory inorganic waste liquid on site so that the treated inorganic waste liquid meets national emission standards; and the waste unit treatment cost of the present invention is low and the floor space is small.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] The present invention provides an inorganic waste liquid flash treatment system, wherein the inorganic waste liquid flash treatment system is an n-shaped or U-shaped structure as a whole, and comprises a mixing chamber, a waste liquid flash treatment device, an exhaust gas purification device and a fan;

[0010] Air and waste liquid are sent into the mixing chamber for mixing to form a tiny particle-like gas-liquid mixture; the gas-liquid mixture enters the waste liquid flash treatment device for flash evaporation treatment, so that the salt contained in the waste liquid is quickly separated to form waste gas including air, water vapor and salt; the waste gas after flash evaporation treatment enters the waste gas purification device for purification treatment to obtain purified gas that meets the emission standards and is discharged through the fan.

[0011] More preferably, the inorganic waste liquid flash treatment system further comprises a drain valve;

[0012] The remaining waste liquid that has not been completely evaporated by the flash evaporation treatment of the waste liquid treatment device is recovered through the drain valve and returned to the system for treatment again.

[0013] More preferably, the mixing chamber is arranged at the first section of the open end of one side of the system, and a plurality of air distribution pipes directly or indirectly connected to the air supply duct are arranged at the inlet position;

[0014] The spray head of the waste liquid spray gun extends into the mixing chamber and is connected to a delivery pump through a delivery pipe, so that the waste liquid can be delivered into the mixing chamber.

[0015] More preferably, the extension lines of the outlet center lines of multiple evenly arranged air distribution ducts are tangent to the rotary cutting circle, and the diameter D2 of the rotary cutting circle, the diameter D1 of the mixing chamber and the diameter D3 of the air distribution duct satisfy the relationship: D2 = (0.3 ~ 0.8) * D1; D3 = (0.01 ~ 0.1) * D2.

[0016] More preferably, a plurality of heating plates are provided in the waste liquid flash treatment device;

[0017] The height N of the heating plate satisfies: N = (0.6-2) * D1, where D1 is the diameter of the mixing chamber;

[0018] The distance M between two adjacent electric heating plates satisfies: M=5-30 mm.

[0019] More preferably, the heating plate adopts a corrugated plate structure heating plate.

[0020] More preferably, the exhaust gas purification device comprises: a dewatering plate installed horizontally or obliquely in the exhaust gas purification device; the dewatering plate is a grid structure.

[0021] More preferably, the exhaust gas purification device comprises: a primary desalination device and a deep desalination device arranged in sequence; the primary desalination device is filled with fiber and polymer material media; and the deep desalination device is filled with porous media.

[0022] The present invention also provides a flash treatment method for inorganic waste liquid, which is implemented by applying the above-mentioned flash treatment system for inorganic waste liquid, and comprises the following steps:

[0023] Step S101, air and waste liquid are respectively sent into a mixing chamber to mix gas and liquid to form a micro-particle gas-liquid mixture;

[0024] Step S102, the gas-liquid mixture enters the waste liquid flash treatment device for flash evaporation treatment, and the salt contained in the liquid is quickly separated from the liquid to obtain waste gas containing air, water vapor and salt;

[0025] In step S103, the waste gas enters the waste gas purification device, and is dewatered by the dewatering plate. The larger particles of liquid fall back into the waste liquid flash treatment device for flash evaporation treatment. The waste gas enters the primary desalination device for primary desalination treatment, and harmful solid particles in the waste gas are adsorbed. The waste gas after the harmful solid particles are removed enters the deep desalination device for deep desalination treatment, and harmful components such as heavy metals in the waste gas are adsorbed to obtain purified gas that meets the emission standards.

[0026] Step S104, discharging the purified gas into the air.

[0027] More preferably, the inorganic waste liquid flash treatment method further comprises:

[0028] The waste liquid that remains after flash evaporation treatment is recycled and sent back into the entire system for further treatment.

[0029] It can be seen from the above technical solutions of the present invention that the present invention has the following beneficial effects:

[0030] 1. The system of the present invention adopts a U-type or n-type structure, which is compact and occupies a small area;

[0031] 2. The present invention uses a mixing chamber to fully mix the waste liquid with air to form a gas-liquid mixture with very fine particles; the gas-liquid mixture enters the waste liquid flash treatment device to evaporate the salt in the waste liquid through flash, forming waste gas containing air, water vapor, and salt; then enters the waste gas purification device for dehydration, primary desalination to remove the salt in the waste gas, and deep desalination to adsorb the heavy metals and other solid particles in the waste gas. The final emissions are only a mixture of air and water vapor that meets national emission standards and a small amount of solid salt captured by the desalination device, and no waste liquid is discharged. It can be seen that the present invention uses physical methods to treat waste liquid throughout the process, and there is no waste liquid discharge during the treatment of inorganic waste liquid, and the treatment efficiency is high; no additional treatment agent needs to be added during the treatment process, and no other new pollutants that are difficult to treat are generated, and the unit waste treatment cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of an inorganic waste liquid flash treatment system according to Embodiment 1 of the present invention;

[0033] Figure 2 This is a schematic diagram of the arrangement structure of the air distribution duct in the first embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the structure of the heating plate in the first embodiment of the present invention;

[0035] Figure 4-1 This is a schematic diagram of the structure of the water removal plate in the first embodiment of the present invention;

[0036] Figure 4-2 for Figure 4-1 AA section view in;

[0037] Figure 5 It is a structural schematic diagram of the inorganic waste liquid flash treatment system according to the second embodiment of the present invention.

[0038] Reference numerals:

[0039] Mixing chamber 1; air distribution duct 11; waste liquid spray gun 12; delivery pump 13; waste liquid flash treatment device 2; heating plate 21; waste gas purification device 3; dewatering plate 31; primary desalination device 32; deep desalination device 33; fan 4, drain valve 5. DETAILED DESCRIPTION

[0040] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples of the specification. The following examples are only used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0041] The terms such as upper, lower, left, right, inside, outside, front end, rear end, head, tail, etc. in this application document are based on the positions or positions shown in the drawings. If the drawings are different, the corresponding positions may also change accordingly, so they cannot be understood as limiting the scope of protection.

[0042] In the present invention, the terms "install", "connected", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection or mutual communication, a direct connection or an indirect connection through an intermediate medium, the internal connection of two components, or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Embodiment 1:

[0044] The present invention provides an inorganic waste liquid flash treatment system, the structure of the system is as follows Figure 1 As shown, the system as a whole is an n-type structure, including: a mixing chamber 1, a waste liquid flash treatment device 2 and a waste gas purification device 3 arranged in sequence in the n-type structure, and a fan 4 and a drain valve 5 arranged outside the n-type structure.

[0045] Air and waste liquid are sent into the mixing chamber 1 for mixing to form a tiny granular gas-liquid mixture; the gas-liquid mixture enters the waste liquid flash treatment device 2 for flash evaporation treatment, so that the salt contained in the waste liquid is quickly separated; the waste gas after the flash evaporation treatment enters the waste gas purification device 3 for purification treatment to obtain purified gas that meets the emission standards, and is discharged through the fan 4.

[0046] The residual waste liquid that cannot be completely treated by flash evaporation is recovered through the drain valve 5 and returned to the system for treatment again.

[0047] The functions and detailed structures of each component are as follows:

[0048] 1. Mixing chamber 1

[0049] The mixing chamber 1 is arranged at the first section of the open end of one side of the n-type system, and a plurality of air distribution pipes 11 are arranged at the inlet position. The air distribution pipes 11 are directly or indirectly connected to the air supply pipe so as to send the air sucked in by the negative pressure of the fan into the mixing chamber 1;

[0050] The nozzle of the waste liquid spray gun 12 extends into the mixing chamber 1, and is connected to the delivery pump 13 through a delivery pipe, so as to deliver the salt-containing waste liquid into the mixing chamber 1. The waste liquid spray gun 12 adopts a high-pressure atomizing nozzle, so that the waste liquid droplets sprayed into the mixing chamber 1 are fine.

[0051] The air and waste liquid sent into the mixing chamber 1 can be fully mixed in the mixing chamber 1 under the combined action of the wind force of the air distribution pipe 11 and the pressure of the waste liquid spray gun 12 to form a micro-granular gas-liquid mixture.

[0052] The structure of the mixing chamber 1 is as follows:

[0053] In order to ensure that the waste liquid and air have enough time to mix, the height H4 of the mixing chamber 1 is designed to meet the following conditions: H4 = (0.8-2) * D1, where D1 is the diameter of the mixing chamber 1;

[0054] Considering that the smaller the liquid particles are, the shorter the time required for the evaporation process is, and the more complete the evaporation is; the larger the amount of waste liquid to be treated, the lower the overall energy consumption is. In order to ensure that the waste liquid and air can be fully mixed and the particles of the gas-liquid mixture after mixing in the mixing chamber 1 are as small as possible, the outlet center line extension lines of multiple evenly arranged air distribution pipes 11 are designed to be tangent to the rotary cutting circle (such as Figure 2 As shown), the diameter D2 of the rotary cutting circle, the diameter D1 of the mixing chamber 1 and the diameter D3 of the air distribution pipe satisfy the following relationship:

[0055] D2=(0.3~0.8)*D1; D3=(0.01~0.1)*D2.

[0056] The arrangement of the above structure enables the air entering the mixing chamber 1 through the air distribution pipe 11 to be fed tangentially along the rotary cutting circle, and the supplied air can rotate circumferentially along the rotary cutting circle in the mixing chamber 1. While rotating, the waste liquid fed from the center of the mixing chamber through the waste liquid spray gun 12 is continuously drawn in and fully mixed, thereby making the particle size of the gas-liquid mixture fine, which is beneficial to the evaporation of water in the subsequent flash separation process and makes the evaporation more complete.

[0057] In order to make the particle size of the gas-liquid mixture finer, a plurality of rotary cutting circles can be provided, and the diameter of each rotary cutting circle decreases successively from the head end to the tail end of the mixing chamber 1. A plurality of air distribution pipes 11 are arranged corresponding to each rotary cutting circle, and the extension lines of the outlet center lines of the plurality of air distribution pipes 11 are made tangent to the corresponding rotary cutting circles. The air distribution pipes 11 arranged layer by layer can make the air supplied to the mixing chamber 1 rotate in a vortex manner, and gradually draw in and fully mix the waste liquid sent from the center direction of the mixing chamber through the waste liquid spray gun 12, thereby making the particle size of the gas-liquid mixture finer.

[0058] 2. Waste liquid flash treatment device 2

[0059] A heating plate 21 is provided in the waste liquid flash treatment device 2. The heating plate 21 generates heat by electric heating. After the heat is absorbed by the gas-liquid mixture entering the waste liquid flash treatment device 2, the water in the gas-liquid mixture is quickly converted into steam, and the salt in the water is precipitated therefrom. The mixed gas obtained after the flash treatment contains air, water vapor and salt (hereinafter referred to as waste gas).

[0060] The heating plate 21 is used as follows Figure 3 The corrugated structure heating plate shown in the figure, the heating plate 21 adopts a corrugated structure which can not only increase the contact area between the gas-liquid mixture and the heating plate and improve the gas evaporation rate, but also increase the residence time of the gas-liquid mixture in the heating area, so that the liquid in the gas-liquid mixture can be fully evaporated, thereby fully analyzing the salt therein.

[0061] In order to ensure the heating energy and residence time, the height N of the heating plate 21 is designed to satisfy: N=(0.6-2)*D1, where D1 is the diameter of the mixing chamber 1.

[0062] In order to ensure the flow rate of the gas-liquid mixture, the present application designs the distance M between two adjacent electric heating plates to satisfy: M = 5-30 mm. Such a flow cross section can ensure that the gas-liquid mixture passes through the waste liquid flash treatment device 2 at a certain flow rate.

[0063] Since the waste liquid has complex components, including acidic and alkaline, in order to protect the heating plate 21 and prevent the heating plate 21 from corrosion, a corrosion-resistant non-metallic material is sprayed on the heating plate 21 .

[0064] 3. Exhaust gas purification device 3

[0065] The waste gas obtained after being treated by the waste liquid flash treatment device 2 contains air, water vapor and salt, and subsequently enters the waste gas purification device 3 for purification treatment.

[0066] The exhaust gas purification device 3 is provided with a dewatering plate 31 , a primary desalination device 32 , and a deep desalination device 33 in sequence.

[0067] (I) Water removal plate 31

[0068] In order to reduce the water content in the exhaust gas, a dewatering plate 31 is installed in the exhaust gas purification device 3, and it can be installed horizontally or tilted. The dewatering plate 31 can strengthen the air flow disturbance, so that the water in the gas-liquid mixture is fully separated, and can separate the larger water particles (also called water microparticles) that are not completely evaporated from the gas, and return them to the waste liquid flash treatment device 2 for secondary flash.

[0069] The structure of the water removal plate 31 is as follows: Figure 4-1 and Figure 4-2As shown, it is a grid structure, the width of the bars is M, the width of the gaps between the bars is C, and the depth of the gaps is F; one end of the gap is expanded, the width of the expansion is B, and the depth of the expansion is E.

[0070] The relationship between the relevant parameters corresponding to the bars, gaps and expansions satisfies:

[0071] M=5~20mm; B=(1.5~3)*C; C=(0.6~3)*M; E=(0.2~1)*F

[0072] The above-mentioned dewatering plate 31 can be provided in multiple pieces, such as Figure 1 The figure shows an example of placing three dewatering plates 31 in the exhaust gas purification device 3, which are respectively installed at angles A1, A2, and A3 in sequence, so that the water particles that cannot be vaporized flow from the high end to the low end and are smoothly separated from the airflow. Angles A1, A2, and A3 satisfy the following relationship:

[0073] A1=0~70 degrees; A2=A1-(5~20); A3=A1-(15~30).

[0074] Multiple dewatering plates 31 are arranged at different heights to achieve multi-stage mixing and multi-stage dewatering. Figure 1 An example is given of placing three dewatering plates 31 in the exhaust gas purification device 3, wherein the height of the first dewatering plate 31 from the mixing chamber 1 is H1, the height of the second dewatering plate from the first dewatering plate is H2, and the height of the third dewatering plate from the second dewatering plate is H3. The relationship among H1, H2 and H3 satisfies: H2 = (1-2) * H1; H3 = (1.5-2.5) * H1.

[0075] (II) Primary desalination unit 32

[0076] In order to remove harmful solid particles in the exhaust gas, a primary desalination device 32 is arranged in the subsequent process of the dewatering plate 31. The primary desalination device 32 adopts a mechanical filtration method and is filled with filter media such as fibers and polymer materials.

[0077] (III) Deep desalination device 33

[0078] In order to remove some harmful components such as heavy metals in the exhaust gas, a deep desalination device 33 is set in the subsequent process of the primary desalination device 32. The deep desalination device 33 adopts an adsorption method and is filled with a filter medium such as a porous medium, such as activated carbon.

[0079] It can be seen that the waste obtained after being treated by the waste liquid flash treatment device 2 enters the waste gas purification treatment device 3, and is successively treated by the dewatering plate 31, the primary desalination device 32 and the adsorption purification of the deep desalination device 33, and the harmful solid particles and heavy metals in the waste gas are adsorbed, so that the purified gas finally meets the national emission standards. The primary desalination device 32 and the deep desalination device 33 can be set in multiple stages according to the situation.

[0080] 4. Fan 4

[0081] A fan 4 is arranged after the exhaust gas purification device 3 , and the fan 4 can discharge the gas purified by the exhaust gas purification device 3 .

[0082] 5. Drain valve 5

[0083] A drain valve 5 is provided at the bottom of the whole system to discharge the waste liquid remaining after the flash analysis. The waste liquid remaining after the flash analysis can be recycled through the drain valve 5 and then sent back into the whole system for further treatment.

[0084] The working principle of the present invention is as follows:

[0085] First, air is fed into the mixing chamber 1 through the fan 4 (negative pressure suction) and waste liquid is fed into the mixing chamber 1 through the delivery pump 13, and the gas and liquid are mixed to form a micro-granular gas-liquid mixture.

[0086] Secondly, under the negative pressure of the fan 4, the tiny particulate gas-liquid mixture enters the waste liquid flash treatment device 2 for liquid evaporation. The heating plate 21 in the waste liquid flash treatment device 2 adopts electric heating, and a corrugated structure heating plate is used to increase the contact area with the gas-liquid mixture, so that the gas-liquid mixture entering the waste liquid flash treatment device 2 is rapidly heated, and the liquid therein evaporates quickly, and the salt in the liquid is quickly separated from the liquid, so this process is also called a flash treatment process. The mixed gas obtained after the flash treatment contains air, water vapor and salt (hereinafter referred to as waste gas). Since the salt contained in the waste gas cannot be discharged directly, it needs to be purified before being discharged. In order to monitor the flash process, temperature and humidity measuring points are set at the outlet of the waste liquid flash treatment device 2.

[0087] Next, under the negative pressure of the fan 4, the exhaust gas enters the exhaust gas purification device 3, in which it undergoes dehydration, primary desalination and deep desalination treatments in the dehydration plate 31, the primary desalination device 32 and the deep desalination device 33 in sequence to obtain purified gas that meets the emission standards.

[0088] Finally, the purified gas is discharged into the air through the fan 4.

[0089] The waste liquid remaining after flash analysis is recovered through the drain valve 5 and can be sent back into the whole system for further treatment.

[0090] Embodiment 2

[0091] Embodiment 2 provides another inorganic waste liquid flash treatment system, the structure of which is as follows: Figure 5 As shown, the difference between the embodiment 1 and the embodiment 2 is that the system of the embodiment 2 is in a U-shaped structure as a whole. The rest is similar to the embodiment 1, and will not be repeated here.

[0092] Embodiment three:

[0093] Embodiment 3 of the present invention further provides a flash treatment method for inorganic waste liquid, which comprises the following steps:

[0094] Step S101, air and waste liquid are respectively sent into the mixing chamber 1, and the gas and liquid are mixed to form a micro-granular gas-liquid mixture;

[0095] Step S102, the gas-liquid mixture enters the waste liquid flash treatment device 2 for flash evaporation treatment, and the salt contained in the liquid is quickly separated from the liquid to obtain waste gas containing air, water vapor and salt;

[0096] The heating plate 21 in the waste liquid flash treatment device 2 adopts electric heating, and a corrugated structure heating plate is used to increase the contact area with the gas-liquid mixture, so that the gas-liquid mixture entering the waste liquid flash treatment device 2 is rapidly heated, the liquid therein evaporates quickly, and the salt in the liquid is quickly separated from the liquid, so this process is also called a flash treatment process. The mixed gas obtained after the flash treatment contains air, water vapor and salt (hereinafter referred to as waste gas). Since the salt contained in the waste gas cannot be discharged directly, it needs to be purified before being discharged. In order to monitor the flash process, temperature and humidity measuring points are set at the outlet of the waste liquid flash treatment device 2.

[0097] In step S103, the waste gas enters the waste gas purification device 3, and is dewatered by the dewatering plate 31. The larger particles of liquid fall back into the waste liquid flash treatment device 2 for flash evaporation treatment. The waste gas enters the primary desalination device 32 for primary desalination treatment, and harmful solid particles in the waste gas are adsorbed. The waste gas after the harmful solid particles are removed enters the deep desalination device 33 for deep desalination treatment, and harmful components such as heavy metals in the waste gas are adsorbed to obtain purified gas that meets the emission standards.

[0098] Step S104: the purified gas is discharged into the air through the fan 4.

[0099] After the above step S103, the method may further include: recycling the waste liquid remaining after the flash evaporation treatment and sending it back into the whole system for further treatment.

[0100] The method in the third embodiment is implemented by the system of the first and second embodiments above. The structure of the system is described above in detail and will not be repeated here.

[0101] Although the principles of the present invention are described in detail above in conjunction with the preferred embodiments of the present invention, those skilled in the art should understand that the above embodiments are merely explanations of the exemplary implementations of the present invention, and are not intended to limit the scope of the present invention. The details in the embodiments do not constitute limitations on the scope of the present invention, and any obvious changes such as equivalent transformations, simple replacements, etc. based on the technical solution of the present invention, without departing from the spirit and scope of the present invention, fall within the protection scope of the present invention.

Claims

1. An inorganic waste liquid flash treatment system, characterized in that: The inorganic waste liquid flash treatment system is an n-shaped or U-shaped structure as a whole, and comprises a mixing chamber (1), a waste liquid flash treatment device (2), an exhaust gas purification device (3) and a fan (4); The mixing chamber (1) is arranged at the first section of the open end on one side of the system; The nozzle of the waste liquid spray gun (12) extends into the mixing chamber (1), and is connected to a delivery pump (13) via a delivery pipe, so as to deliver the salt-containing waste liquid into the mixing chamber (1); A plurality of rotary cut circles are provided, and the diameter of each rotary cut circle decreases in sequence from the head end to the tail end of the mixing chamber (1); a plurality of air distribution pipes (11) are arranged corresponding to each rotary cut circle, and the extension lines of the outlet center lines of the plurality of air distribution pipes (11) are made tangent to the corresponding rotary cut circle; Air and waste liquid are sent into a mixing chamber (1) for mixing to form a gas-liquid mixture in the form of tiny particles; the gas-liquid mixture enters a waste liquid flash treatment device (2) for flash evaporation treatment, so that the salt contained in the waste liquid is quickly separated to form waste gas including air, water vapor and salt; the waste gas after the flash evaporation treatment enters a waste gas purification device (3) for purification treatment to obtain purified gas that meets the emission standards, and is discharged through a fan (4).

2. The inorganic waste liquid flash treatment system according to claim 1, characterized in that: The inorganic waste liquid flash treatment system further comprises a drain valve (5); The remaining waste liquid that has not been completely evaporated after the flash evaporation treatment in the waste liquid flash treatment device (2) is recovered through the drain valve (5) and returned to the system for treatment again.

3. The inorganic waste liquid flash treatment system according to claim 1, characterized in that: The extension lines of the outlet center lines of the multiple evenly arranged air distribution pipes (11) are tangent to the rotary cutting circle, and the diameter D2 of the rotary cutting circle, the diameter D1 of the mixing chamber (1) and the diameter D3 of the air distribution pipes satisfy the relationship: D2 = (0.3-0.8)*D1; D3 = (0.01-0.1)*D2.

4. The inorganic waste liquid flash treatment system according to claim 1, characterized in that: The waste liquid flash treatment device (2) is provided with a plurality of heating plates (21); The height N of the heating plate (21) satisfies: N=(0.6-2)*D1, where D1 is the diameter of the mixing chamber (1); The distance M between two adjacent heating plates (21) satisfies: M=5-30 mm.

5. The inorganic waste liquid flash treatment system according to claim 4, characterized in that: The heating plate (21) is a heating plate with a corrugated plate structure.

6. The inorganic waste liquid flash treatment system according to claim 1, characterized in that: The exhaust gas purification device (3) comprises: a dewatering plate (31) installed horizontally or obliquely in the exhaust gas purification device (3); the dewatering plate (31) is a grid structure.

7. The inorganic waste liquid flash treatment system according to claim 6, characterized in that: The exhaust gas purification device (3) comprises: a primary desalination device (32) and a deep desalination device (33) arranged in sequence; the primary desalination device (32) is filled with fiber and polymer material media; and the deep desalination device (33) is filled with porous media.

8. A flash treatment method for inorganic waste liquid, characterized in that: The inorganic waste liquid flash treatment method is implemented by using the inorganic waste liquid flash treatment system according to claim 7, and comprises the following steps: Step S101, air and waste liquid are respectively sent into a mixing chamber (1) to mix gas and liquid to form a micro-particle gas-liquid mixture; Step S102, the gas-liquid mixture enters the waste liquid flash treatment device (2) for flash evaporation treatment, and the salt contained in the liquid is quickly separated from the liquid to obtain waste gas containing air, water vapor and salt; In step S103, the waste gas enters the waste gas purification device (3), and is dewatered by the dewatering plate (31), and the larger particles of liquid fall back into the waste liquid flash treatment device (2) for flash evaporation treatment; the waste gas enters the primary desalination device (32) for primary desalination treatment, and harmful solid particles in the waste gas are adsorbed; then the waste gas with the harmful solid particles removed enters the deep desalination device (33) for deep desalination treatment, and harmful components such as heavy metals in the waste gas are adsorbed, thereby obtaining purified gas that meets the emission standards; Step S104, discharging the purified gas into the air.

9. The flash treatment method for inorganic waste liquid according to claim 8, characterized in that: The inorganic waste liquid flash treatment method also includes: The waste liquid that remains after flash evaporation treatment is recycled and sent back into the entire system for further treatment.

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