Waste liquid treatment device based on condensed water recovery

Abstract

In the field of waste liquid treatment, the utility model provides a waste liquid treatment device based on condensed water recovery, which comprises a waste liquid pretreatment box, an atomizer, a heater, a gas purifier, a water condenser and an exhaust fan which are connected in sequence, the system further comprises an ice water machine. The ice water machine comprises a condenser, an air feeder, a compressor, an evaporator and a circulating water pump. The condenser is connected with the heater, the air feeder feeds air into the condenser, heat exchange is carried out in the condenser, hot air is obtained, and the condenser conveys the hot air into the heater; the compressor compresses a refrigerant into high-temperature and high-pressure gas, the high-temperature and high-pressure gas is conveyed into the condenser to be subjected to heat exchange with air introduced by the air feeder, the refrigerant is changed into a low-temperature and low-pressure liquid state and conveyed to the evaporator, and the refrigerant exchanges heat with liquid in the water condenser in the evaporator; the two ends of the evaporator are connected with the two ends of a spiral heat exchange pipe in the water condenser respectively. The system is compact in structure, small in occupied area and high in treatment efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of waste liquid treatment, in particular to a waste liquid treatment device based on condensed water recovery. Background Art

[0002] With the rapid development of science and technology, laboratories in universities, research institutes, and enterprises are constantly expanding. The variety, number, and scale of laboratories are also growing, bringing with them pollution problems. Laboratory pollutants primarily include solid waste, waste liquids, exhaust gases, noise and vibration, electromagnetic radiation, and biological pollutants such as viruses and pathogens. University laboratory waste is highly toxic and hazardous, but environmental protection authorities do not include it in environmental testing. Even if they were, it would be difficult to detect due to its small volume and easy dilution with domestic sewage. Laboratory waste liquids primarily come from research laboratories at various research institutions and research and teaching laboratories at universities. Laboratory waste liquids have unique characteristics: small volumes, intermittent production, high hazards, and complex and variable composition. Based on the properties of the primary pollutants contained in the waste liquids, they can be divided into two categories: organic and inorganic laboratory waste liquids. Inorganic waste liquids primarily contain heavy metals, heavy metal complexes, acids and bases, cyanides, sulfides, halogen ions, and other inorganic ions.

[0003] Direct discharge of inorganic wastewater is a serious environmental pollutant, yet difficult to regulate. Currently, many laboratories discharge inorganic wastewater through dilution, or even directly into laboratory sewers and municipal pipelines, causing significant environmental damage.

[0004] At present, chemical methods are generally used to treat inorganic waste liquid. According to the composition of the waste liquid, chemicals are added to the waste liquid to make the components in the waste liquid react with the added chemicals to generate precipitates. The precipitation is enhanced by adding flocculants, and then the waste liquid is treated by infiltration, filtration, disinfection, etc. The generated reclaimed water is discharged into the municipal pipeline network, and sludge is also generated, which requires special treatment.

[0005] Chemical methods for treating inorganic waste liquids are complex, occupy a large area, consume a large amount of consumables, emit a pungent odor during the treatment process, and produce a large amount of sludge at the end of the treatment that is difficult to handle. This results in low efficiency and high cost of the overall chemical treatment equipment, making it unsuitable for treating waste liquids generated in laboratories. Summary of the Invention

[0006] To address the above-mentioned issues, the present invention provides a waste liquid treatment device based on condensate recovery. The condensate recovered by this device after treatment can be recycled or discharged in compliance with emission standards, and the exhaust gas meets emission standards. After treatment, only a small amount of solid slag is produced. This process system has a compact structure, a small footprint, high treatment efficiency, and does not require the addition of additional treatment agents. The unit cost of waste treatment is low, and it can effectively treat inorganic laboratory waste liquids. Specifically, it includes:

[0007] A waste liquid treatment device based on condensed water recovery includes a waste liquid pretreatment box, an atomizer, a heater, a gas purifier, a water condenser and an exhaust fan connected in sequence; and also includes a water chiller;

[0008] The ice water machine includes: a condenser, a blower, a compressor, an evaporator and a circulating water pump;

[0009] The condenser is connected to the heater, the blower sends air into the condenser and performs heat exchange in the condenser to obtain hot air, and the condenser transmits the hot air to the heater;

[0010] The compressor compresses the refrigerant into a high-temperature, high-pressure gas and transmits it to the condenser for heat exchange with the air introduced by the blower. The refrigerant then changes to a low-temperature, low-pressure liquid and is transmitted to the evaporator. The refrigerant exchanges heat with the liquid in the water condenser in the evaporator.

[0011] The two ends of the evaporator are respectively connected to the two ends of the spiral heat exchange tube in the water condenser.

[0012] Optionally, a pH meter and a liquid level controller are respectively provided on the bottom inner wall of the waste liquid pretreatment box, and a waste liquid delivery pump is provided on the transmission pipeline between the waste liquid treatment box and the atomizer;

[0013] Wherein, the waste liquid inlet pipeline and the reagent inlet pipeline are connected to the waste liquid pretreatment box;

[0014] The waste liquid inlet pipeline is used to add the waste liquid to be treated into the waste liquid pretreatment tank;

[0015] The reagent inlet pipeline is used to add acidic reagent or alkaline reagent into the waste liquid pretreatment box.

[0016] Optionally, the waste liquid pretreatment box further comprises: a compressed air pipeline,

[0017] The compressed air pipeline introduces compressed gas into the bottom of the inner cavity of the waste liquid pretreatment box.

[0018] Optionally, the atomizer comprises:

[0019] An atomizer housing is provided with a waste liquid inlet, the waste liquid inlet is connected to the waste liquid delivery pump, an upper flange is welded to the top of the atomizer housing, a lower flange is welded to the bottom of the atomizer housing, an upper cover plate is mounted on the upper flange by bolts, and a lower cover plate is mounted on the lower flange by bolts;

[0020] a liquid level gauge installed in the inner cavity of the atomizer housing;

[0021] an air inlet and an air outlet, wherein the air inlet is provided on the inner wall of one side of the atomizer housing and communicates with the inner cavity of the atomizer housing, and the air outlet is provided on the inner wall of the other side of the atomizer housing and communicates with the inner cavity of the atomizer housing;

[0022] An ultrasonic generator and a power supply, wherein the ultrasonic generator is mounted on the lower cover plate and disposed in the cavity of the atomizer housing, and a pipeline of the ultrasonic generator passes through the atomizer housing and is connected to the power supply;

[0023] A mounting plate and an atomizing head, wherein the mounting plate is welded to the inner wall of the atomizer housing and is arranged above the ultrasonic generator, a plurality of atomizing heads are evenly arrayed and mounted on the mounting plate, and each atomizing head is respectively connected to the ultrasonic generator.

[0024] Optionally, the atomizer further comprises:

[0025] A spray washer, the spray washer being mounted on the top of the cavity of the atomizer housing;

[0026] The spray washer comprises: a water inlet pipe, a distribution pipe, a blocking plate and a spray pipe;

[0027] One end of the water inlet pipe passes through the upper cover plate and is connected to the tap water pipe, and the other end of the water inlet pipe is connected to the distribution pipe, and the blocking plate blocks both ends of the distribution pipe;

[0028] A plurality of the spray pipes are sequentially installed on the distribution pipe.

[0029] Optionally, the spray pipe is a reducing pipe, and the diameter of the inlet end of the spray pipe is larger than the diameter of the outlet end of the spray pipe;

[0030] The number of the spray pipes is equal to the number of the atomizing heads. Each atomizing head is equipped with a spray pipe, and the spray pipe is arranged directly above the corresponding atomizing head.

[0031] Optionally, the air inlet of the heater is connected to the gas outlet of the atomizer, and the air outlet of the heater is connected to the gas purifier;

[0032] An air inlet is provided at the bottom of the heater, and the heat exchange tube in the heater is connected to the condenser through the air inlet;

[0033] The heat exchange tube is an internal thread and external fin structure.

[0034] Optionally, the gas purifier includes a filter box, a deacidification box and an adsorption box which are arranged in sequence, and the gas entering the gas purifier is filtered, deacidified and adsorbed in sequence.

[0035] Optionally, the heat exchange tubes in the water condenser are spirally arranged, the two ends of the heat exchange tubes in the water condenser are connected to the two ends of the evaporator, a condensate outlet is set at the bottom of the water condenser, and an exhaust fan is set at the end of the water condenser away from the gas purifier.

[0036] Optionally, the refrigerant is R290 or R410a.

[0037] Compared with the prior art, the above technical solution has at least the following beneficial effects:

[0038] The atomization method of the utility model adopts ultrasonic atomization, which has low energy consumption. It adopts a small lower section and a large upper section, which is conducive to the evaporation of water and the uniform mixing of water vapor and air. The atomizer shell is welded to the atomizer head mounting plate, and the atomizer head is threaded to the atomizer head mounting plate. This can ensure that waste liquid does not flow under the mounting plate, and the waste liquid is completely isolated from the electrical components, ensuring the safety of the electrical equipment. The negative pressure gauge controls the pressure in the atomizer, which can ensure that all generated steam is removed in time. The spray cleaner can regularly clean the atomizer head to ensure the atomization volume and atomization quality. The atomizer is flange-connected at the top and bottom, which is convenient for maintenance and inspection of internal components.

[0039] The heating heat source of the heater of the utility model adopts the waste heat generated in the cold water preparation process, and no additional energy consumption is required. The heater adopts a shell and tube structure, and the resistance of the heat exchange medium is small, which can reduce the energy consumption of air supply. The heat exchange tube adopts an internal thread and external fin structure, which increases the unit heat exchange area and reduces the equipment volume.

[0040] The gas purifier of this utility model comprises multiple chambers, and gas purification is performed in stages. The filtration chamber removes impurities such as particulate matter, salt, and heavy metals from the gas. The chambers are filled with filter materials such as fiberglass and composite materials. The deacidification chamber removes acidic components from the gas. The chambers are filled with calcium- and iron-based deacidifiers, and the adsorption chamber removes harmful components such as heavy metals and VOCs from the gas. The chambers are filled with porous media such as activated carbon.

[0041] The cooling ice water and the mixed gas in the water condenser of the utility model flow in the countercurrent direction, thereby increasing the heat exchange temperature difference and reducing the area of ​​the spiral heat exchange tube; corrosion of the spiral heat exchange tube is prevented by using corrosion-resistant materials such as stainless steel.

[0042] The evaporator and condenser in the ice water machine of the utility model both adopt spiral coil heat exchange, and copper tubes with good heat exchange effect and easy processing are used as heat exchange tubes. The refrigerant of the utility model adopts environmentally friendly R290 or R410A, which has high refrigeration efficiency. The heat discharged by the condensation of the refrigerant of the utility model is used to heat the mixed gas, so that energy is comprehensively utilized and the cost of waste liquid treatment is reduced.

[0043] The utility model can effectively remove harmful components such as various salts and heavy metals contained in inorganic waste liquid.

[0044] At room temperature, the water in the waste liquid evaporates into gas, preventing the decomposition of harmful components. Salts and heavy metals in the waste liquid precipitate into solid particles, which are then adsorbed by the purification device. The waste liquid is then divided into three parts: the majority is recyclable water, a small portion is expelled as gas with the air, and harmful solid components are adsorbed by the purification device, preventing the generation of new, difficult-to-treat pollutants. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0046] Figure 1 It is a schematic diagram of the device of the utility model;

[0047] Figure 2 This is a schematic diagram of the installation structure of the atomizing head of the utility model;

[0048] Figure 3 This is a schematic diagram of the mounting plate structure of the utility model;

[0049] Figure 4 This is a schematic structural diagram of the spray cleaning device of the present utility model;

[0050] Figure 5 These are a top view and a front view of the heater of the present invention.

[0051] Marking Description:

[0052] 1. Waste liquid pretreatment box; 11. pH meter; 12. Liquid level controller; 2. Waste liquid delivery pump; 3. Atomizer; 31. Waste liquid inlet; 32. Atomizer housing; 33. Lower flange; 34. Ultrasonic generator; 35. Mounting plate; 36. Atomizer head; 37. Lower cover; 38. Power supply; 39. Liquid level gauge; 310. Gas outlet; 311. Inlet valve; 312. Air inlet; 313. Spray washer; 3131. Water inlet pipe; 3132. Distribution pipe; 3133. Blocking plate; 3134. Spray pipe; 314. Upper Cover plate; 315, negative pressure gauge; 316, upper flange; 4, heater; 41, air inlet; 42, tube sheet; 43, heat exchange tubes in heater; 44, panel; 45, air outlet; 46, air inlet; 5, gas purifier; 51, filter box; 52, deacidification box; 53, adsorption box; 6, water condenser; 61, shell; 62, heat exchange tubes in water condenser; 63, condensate outlet; 7, exhaust fan; 8, chiller; 81, circulating water pump; 82, evaporator; 83, compressor; 84, blower; 85, condenser. DETAILED DESCRIPTION

[0053] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the usual meanings understood by persons of ordinary skill in the field to which this utility model belongs. The words "first", "second" and similar terms used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0055] It should be noted that the terms "up", "down", "left", "right", "front" and "back" used in the present invention are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0056] like Figure 1 As shown, a waste liquid treatment device based on condensed water recovery includes a waste liquid pretreatment box 1, an atomizer 3, a heater, a gas purifier, a water condenser and an exhaust fan connected in sequence; and also includes a water chiller;

[0057] The heating end of the water chiller 8 is connected to the heater 4 , and the cooling end of the water chiller 8 is connected to the water condenser 6 . The heating end of the water chiller 8 is the condenser 85 , and the cooling end of the water chiller 8 is the evaporator 82 .

[0058] The specific structure of the utility model is:

[0059] The ice machine 8 includes: a condenser 85, a blower 84, a compressor 83, an evaporator 82 and a circulating water pump 81;

[0060] The condenser 85 is connected to the heater 4, the blower 84 sends air into the condenser 85 and performs heat exchange in the condenser 85 to obtain hot air, and the condenser 85 transmits the hot air to the heater 4; the compressor 83 compresses the refrigerant into a high-temperature and high-pressure gas and transmits it to the condenser 85 for heat exchange with the air introduced by the blower 84. The refrigerant is then changed into a low-temperature and low-pressure liquid state and transmitted to the evaporator 82. The refrigerant exchanges heat with the liquid in the water condenser 6 in the evaporator 82; the two ends of the evaporator 82 are respectively connected to the two ends of the spiral heat exchange tube in the water condenser 6.

[0061] A pH meter 11 and a liquid level controller 12 are respectively provided on the inner wall of the bottom of the waste liquid pretreatment tank 1, and a waste liquid delivery pump 2 is provided on the transmission pipeline of the waste liquid treatment tank 1 and the atomizer 3; a waste liquid inlet pipeline and a reagent inlet pipeline are connected to the waste liquid pretreatment tank 1; the waste liquid inlet pipeline is used to add the waste liquid to be treated into the waste liquid pretreatment tank 1; the reagent inlet pipeline is used to add an acidic reagent or an alkaline reagent into the waste liquid pretreatment tank 1.

[0062] The waste liquid pretreatment box 1 further includes: a compressed air pipeline, which introduces compressed gas into the bottom of the inner cavity of the waste liquid pretreatment box 1.

[0063] The atomizer 3 includes: a spray cleaner 313, an atomizer housing 32, a liquid level gauge 39, an ultrasonic generator 34, a power supply 38, an air inlet 312, an air outlet, a mounting plate 35 and an atomizing head 36; a waste liquid inlet 31 is provided on the atomizer housing 32, the waste liquid inlet 31 is connected to the waste liquid delivery pump 2, an upper flange 316 is welded to the top of the atomizer housing 32, a lower flange 33 is welded to the bottom of the atomizer housing 32, an upper cover plate 314 is mounted on the upper flange 316 by bolts, and a lower cover plate 37 is mounted on the lower flange 33 by bolts; the liquid level gauge 39 is mounted in the inner cavity of the atomizer housing 32; the air inlet 312 is provided on one side of the atomizer housing 32 The atomizer housing 32 is provided with an air inlet valve 311 on the inner wall thereof and is communicated with the inner cavity of the atomizer housing 32; the air outlet is provided on the inner wall on the other side of the atomizer housing 32 and is communicated with the inner cavity of the atomizer housing 32; the ultrasonic generator 34 is mounted on the lower cover plate 37 and is arranged in the cavity of the atomizer housing 32; the pipeline of the ultrasonic generator 34 passes through the atomizer housing 32 and is connected to the power supply 38; the mounting plate 35 is welded to the inner wall of the atomizer housing 32 and is arranged above the ultrasonic generator 34; a plurality of atomizing heads 36 are evenly arrayed on the mounting plate 35, and each atomizing head 36 is respectively connected to the ultrasonic generator 34.

[0064] The spray cleaner 313 is mounted on the top of the cavity of the atomizer housing 32; the spray cleaner 313 includes: a water inlet pipe 3131, a distribution pipe 3132, a blocking plate 3133 and a spray pipe 3134; one end of the water inlet pipe 3131 passes through the upper cover 314 and is connected to the tap water pipe, the other end of the water inlet pipe 3131 is connected to the distribution pipe 3132, and the blocking plate 3133 blocks both ends of the spray pipe; multiple spray pipes 3134 are sequentially mounted on the distribution pipe 3132, the spray pipe 3134 is a reducer, and the inlet end diameter of the spray pipe 3134 is larger than the outlet end diameter of the spray pipe 3134; the number of the spray pipes 3134 is equal to the number of the atomizing heads 36, each of the atomizing heads 36 is equipped with a spray pipe 3134, and the spray pipe 3134 is arranged directly above the corresponding atomizing head 36.

[0065] The air inlet 41 of the heater 4 is connected to the gas outlet 310 of the atomizer 3, and the air outlet 45 of the heater 4 is connected to the gas purifier 5; an air inlet 46 is provided at the bottom of the heater 4, and the heat exchange tube 43 in the heater is connected to the condenser 85 through the air inlet 46; the heat exchange tube is an internal threaded external fin structure.

[0066] The gas purifier 5 includes a filter box 51, a deacidification box 52, and an adsorption box 53, which are arranged in sequence. The gas entering the gas purifier 5 is filtered, deacidified, and adsorbed in sequence. The heat exchange tubes 62 within the condenser are spirally arranged, with both ends connected to the ends of the evaporator 82. A condensate outlet 63 is provided at the bottom of the condenser 6, and an exhaust fan 7 is located at the end of the condenser facing away from the gas purifier 5. The refrigerant is R290 or R410a.

[0067] Based on the above device, the method includes the following steps:

[0068] S1, adding the waste liquid into the waste liquid pretreatment tank 1 for pretreatment to obtain pretreated waste liquid;

[0069] Add the waste liquid into the waste liquid pretreatment tank 1 through the waste liquid pump until the preset liquid level requirement is reached;

[0070] According to the pH value of the waste liquid, an acidic reagent or an alkaline reagent is added to the waste liquid through a reagent pump until the pH value of the waste liquid is equal to 7, thereby obtaining pretreated waste liquid, wherein, when the reagent is added to the waste liquid, compressed air is introduced into the waste liquid treatment box.

[0071] S2, the atomizer 3 atomizes the pretreated waste liquid through air and an ultrasonic generator 34 to obtain an atomized mixed gas;

[0072] The pretreated waste liquid is transported to the atomizer 3 by the waste liquid pump, wherein the delivery volume of the waste liquid pump is adjusted according to the data of the liquid level meter 39 in the atomizer 3;

[0073] Open the air inlet valve 311 of the atomizer 3 and adjust the opening of the air inlet valve 311 of the atomizer 3 by using the negative pressure gauge 315 in the atomizer 3, so that the air inlet valve allows air to flow into the atomizer 3;

[0074] The ultrasonic generator 34 in the atomizer 3 is powered, and the waste liquid is atomized based on the air introduced by the air inlet valve 311 and the sound waves of a specific frequency generated by the ultrasonic generator 34 to obtain an atomized mixed gas.

[0075] S3, the heater 4 heats the atomized mixed gas through the ice water machine 8 and sends it to the gas purifier 5;

[0076] The atomized mixed gas is sent to the air inlet 41 of the heater 4 through the exhaust port of the atomizer 3;

[0077] The hot air from the heating end of the ice water machine 8 enters the heat exchange tube 43 in the heater through the air inlet 46 of the heater 4, and the heat exchange tube heats the atomized mixed gas;

[0078] The heated mixed gas is sent to the gas purifier 5 .

[0079] S4, the gas purifier 5 sequentially filters, deacidifies and adsorbs the heated mixed gas to obtain a purified mixed gas;

[0080] The heated mixed gas passes through the filter box 51, the deacidification box 52 and the adsorption box 53 in sequence to obtain a purified mixed gas.

[0081] The filter box 51 filters the heated mixed gas to remove particulate matter, salt and heavy metals in the heated mixed gas.

[0082] The deacidification box 52 deacidifies the heated mixed gas to remove acidic components in the heated mixed gas.

[0083] The adsorption box 53 adsorbs the heated mixed gas to remove heavy metals and VOCs organic gases in the heated mixed gas.

[0084] S5. The water condenser 6 condenses the water vapor in the purified mixed gas into water through the water chiller 8. The obtained dry air is discharged by the exhaust fan 7, and the condensed water is discharged.

[0085] The purified mixed gas enters the water condenser 6, and the refrigeration end of the water chiller 8 absorbs heat to reduce the temperature in the water condenser 6. The water vapor in the purified mixed gas condenses into water, and the condensed water is discharged through the condensate outlet 63 of the water condenser 6.

[0086] The principles and specific implementation methods of each device in this method are as follows:

[0087] In a specific embodiment, the waste liquid pretreatment box 1 is mainly used to store waste liquid and pre-treat the waste liquid. It is internally connected with a pH meter 11 and a liquid level detector.

[0088] In a specific embodiment, the atomizer 3 mainly atomizes the waste liquid through ultrasonic waves to generate water vapor, which is then introduced into the atomizer 36 to mix with the water vapor and carry away the water vapor. The atomizer head 36 is sprayed and cleaned regularly.

[0089] like Figures 2 to 4 As shown, the lower section of the atomizer 3 is a square or circular structure, and the upper section is a flared structure. Overall, the lower section is small and the upper section is large.

[0090] The atomizer housing 32 is welded with an upper flange 316 and a lower flange 33, which are bolted to the upper cover plate 314 and lower cover plate 37, respectively, to facilitate disassembly and inspection of internal components. The housing also features a waste liquid inlet 31, a liquid level gauge 39, an air inlet 312, and a gas outlet 310. A mounting plate 35 is also welded to the atomizer housing 32. This mounting plate 35 has several threaded holes for mounting an atomizer head 36. The bottom of the atomizer head 36 has external threads that connect directly to the threads of the mounting plate 35. The atomizer heads 36 are arranged in a staggered pattern to effectively atomize the waste liquid.

[0091] The upper cover 314 is connected to the spray washer 313 via a water inlet pipe 3131. The spray washer 313 comprises a water inlet pipe 3131, a distribution pipe 3132, a blocking plate 3133, and a spray pipe 3134. Tap water enters the distribution pipe 3132 through the water inlet pipe 3131 and is sprayed onto the corresponding atomizing head 36 through the spray pipe 3134, thereby cleaning the atomizing head 36. The spray pipe 3134 is a reducing pipe with a large diameter at the inlet end and a small diameter at the outlet end. This allows for a high impact force at a low water supply pressure, effectively cleaning the atomizing head 36.

[0092] The direction of the column is the schematic diagram of the mounting plate 35 structure Figure 3 In the direction shown in FIG, each group of atomizing heads 36 is provided with a spray cleaner 313. Each atomizing head 36 corresponds to a spray pipe 3134, and the spray pipe 3134 is positioned directly opposite the atomizing head 36. This ensures that each atomizing head 36 is cleaned during cleaning. The spray pipe 3134 performs spray cleaning when the liquid level in the atomizer 3 is low. The spray cleaners 313 do not all operate simultaneously, but work in shifts in groups.

[0093] like Figure 5 As shown in a specific embodiment, the heater 4 is mainly used to heat the mixed gas generated by the atomizer 3, increase the temperature of the mixed gas, and prevent the condensation and precipitation of water vapor in the mixed gas.

[0094] The specific structure of heater 4 is conventional, consisting of two panels 44, upper and lower, and two front and rear tube sheets 42. Heat exchange tubes 43 within the heater are connected between the two tube sheets 42, forming a gas channel. Heat exchange tubes 43 within the heater extend 0-5 mm beyond the tube sheets. The front end of the gas channel connects to an air inlet 41 and an air outlet 45, while the front tube sheet 42 is connected to an air inlet 46.

[0095] The mixed gas from the atomizer 3 enters the gas channel through the air inlet 41, and the hot air from the condenser 85 enters the heat exchange tube through the air inlet 46. The hot air in the heat exchange tube releases heat to heat the mixed gas in the gas channel. The cooled air is discharged through the heat exchange tube 43 in the heater, and the heated mixed gas enters the gas purifier 5 through the air outlet 45.

[0096] The heat exchange tube 43 in the heater adopts an internal thread and external fin structure to increase the unit heat exchange area and reduce the volume of the equipment.

[0097] In a specific embodiment, the gas purifier 5 mainly purifies the heated mixed gas to remove harmful components such as particulate matter, salt, acidic gas, heavy metals, etc. in the mixed gas.

[0098] The gas purifier 5 comprises three purification chambers: a filter chamber 51, a deacidification chamber 52, and an adsorption chamber 53. Gas purification is performed in stages: first, filtering the gas to remove impurities such as particulate matter, salt, and heavy metals; then, deacidifying the gas to remove acidic components; and finally, adsorption to remove heavy metals, VOCs, and other organic gases. The specific structures and operating principles of the filter chamber 51, deacidification chamber 52, and adsorption chamber 53 are based on existing technology and are not described in detail here.

[0099] In a specific embodiment, the water condenser 6 primarily condenses the purified mixed gas, removing moisture from the gas. Heat exchange tubes are arranged within the condenser housing 61, and heat exchange tubes 62 within the condenser are connected to a condensate outlet 63. Condensed water is discharged and collected through condensate outlet 63 for recycling. The countercurrent flow of cooling water and the mixed gas increases the heat exchange temperature difference and reduces the area of ​​the spiral heat exchange tubes.

[0100] In a specific embodiment, the water chiller 8 actually follows the principles of Carnot cycle and reverse Carnot cycle, which produces cold water at a lower temperature to cool the mixed gas and precipitate moisture in the mixed gas. At the same time, the heat generated heats the air and heats the mixed gas.

[0101] The ice machine 8 is composed of an evaporator 82, a condenser 85 and a compressor 83. The cooling water is circulated by a circulating water pump 81 and air is supplied by a blower 84.

[0102] The evaporator 82 and the condenser 85 both adopt a spiral coil heat exchange method, and use copper tubes with good heat exchange effect and easy processing as heat exchange tubes.

[0103] The specific working process of this method and the device involved in this method is as follows:

[0104] (1) Wastewater pretreatment

[0105] The waste liquid to be treated is added into the waste liquid pretreatment tank 1 through the waste liquid pump, and the amount of waste liquid added is controlled by the liquid level controller 12;

[0106] pH meter 11 detects the pH value of the waste liquid:

[0107] a. No reagent is added when the pH value is between 6 and 8;

[0108] b. If the pH value is less than 6, add alkaline reagent to the waste liquid through the reagent pump until the pH is equal to 7;

[0109] c. If the pH value is greater than 8, add acidic reagent to the waste liquid through the reagent pump until the pH is equal to 7.

[0110] d. During the reagent addition process, continuously introduce compressed air to enhance the mixing of waste liquid and reagents and ensure that the pH value of the waste liquid is uniform.

[0111] (2) Waste liquid atomization

[0112] The pretreated waste liquid is transported into the atomizer 3 through the waste liquid inlet by the waste liquid delivery pump 2. The waste liquid delivery volume is controlled by the liquid level meter 39, the air inlet valve 311 is opened, the exhaust fan is started, the value of the negative pressure gauge is set, the opening of the air inlet valve 311 is automatically adjusted, the power of the atomizer 3 is turned on, and the ultrasonic generator 34 is powered. The ultrasonic generator 34 generates high-frequency oscillations, which are transmitted to the atomizing head 36. The wastewater is impacted and begins to be atomized.

[0113] The principle is to use ultrasonic directional pressure to cause the liquid surface to bulge, generating cavitation around the bulge, atomizing the liquid into small molecular mist. Specifically, the ultrasonic generator 34 uses high-frequency electronic oscillations (at a frequency of 1.7 MHz or 2.4 MHz, which is above the human hearing range and harmless to humans and animals) to generate a naturally flowing mist through the high-frequency resonance of the atomizing head 36. This breaks up the structure of liquid water molecules.

[0114] The waste liquid is atomized to generate water mist, which moves upward and mixes with the air entering through the air inlet valve 311. Under the suction force of the exhaust fan, it is discharged through the exhaust port and enters the heater.

[0115] (3) Temperature rise of the mixed gas after atomization

[0116] The mixed gas enters the heater through the air inlet and is heated to prevent the atomized water vapor from condensing and separating out. The hot air required for heating comes from the condenser 85.

[0117] (4) Purification of mixed gas after atomization

[0118] The mixed gas enters the gas purifier for filtration, deacidification, adsorption and other treatments.

[0119] (5) Condensation of mixed gas after atomization

[0120] The purified mixed gas enters the water condenser 12 for condensation, where the water vapor in the gas condenses into water, which is collected and recycled. The cooling water required for condensation comes from the evaporator 82. The dry air from which the water is condensed and removed is discharged through the exhaust fan.

[0121] (6) Heating and cooling of mixed gas

[0122] The energy required for heating and cooling the mixed gas is provided by the chiller.

[0123] When the refrigerant in the ice water machine changes its form, it is accompanied by an endothermic or exothermic reaction. The refrigerant absorbs heat when it changes from liquid to gas, and releases heat when it changes from gas to liquid.

[0124] After being compressed by compressor 83, the refrigerant becomes a high-temperature, high-pressure gas. It then enters condenser 85, where it undergoes heat exchange with incoming ambient-temperature air. The refrigerant releases heat, transforming from a gas into a liquid, becoming a low-pressure, low-temperature liquid. Simultaneously, the incoming air absorbs heat, raising its temperature and becoming hot air. This hot air heats the mixed gas from atomizer 3, raising its temperature. Air is supplied by blower 84.

[0125] The low-pressure, low-temperature liquid refrigerant enters evaporator 82 and undergoes heat exchange with the warm water from water condenser 12. The refrigerant absorbs heat and changes from a low-temperature, low-pressure liquid to a low-temperature, low-pressure gas. The temperature of the warm water decreases, generating ice water, which returns to water condenser 85 to cool the mixed gas. The low-temperature, low-pressure gaseous refrigerant returns to compressor 83 for compression and circulation.

[0126] The atomization of the present invention adopts ultrasonic atomization mode, has low energy consumption, adopts the lower section to be small, the upper section to be large, is conducive to the evaporation of water, is conducive to the uniform mixing of water vapor and air, the atomizer housing 32 is welded to the atomizer head mounting plate 35, and the atomizer head 36 is threadedly connected to the atomizer head mounting plate 35. It can ensure that waste liquid does not flow under the mounting plate 35, so that waste liquid is completely isolated from electrical components, ensuring the safety of electrical equipment. The negative pressure gauge controls the pressure in the atomizer 3, which can ensure that all the generated steam is taken away in time. The spray washer 313 can regularly clean the atomizer head 36 to ensure the atomization amount and atomization quality. The atomizer 3 is flange-connected at the top and bottom, which is convenient for maintenance and overhaul of internal components.

[0127] The heating heat source of the heater of the present invention adopts the waste heat generated in the cold water preparation process, and no additional energy consumption is required. The heater adopts a shell and tube structure, the resistance of the heat exchange medium is small, and the energy consumption of air supply can be reduced. The heat exchange tube adopts an internal thread and external fin structure, which increases the unit heat exchange area and reduces the equipment volume.

[0128] The gas purifier of this utility model comprises multiple chambers, and gas purification is performed in stages. The filtration chamber removes impurities such as particulate matter, salt, and heavy metals from the gas. The chambers are filled with filter materials such as fiberglass and composite materials. The deacidification chamber removes acidic components from the gas. The chambers are filled with calcium- and iron-based deacidifiers, and the adsorption chamber removes harmful components such as heavy metals and VOCs from the gas. The chambers are filled with porous media such as activated carbon.

[0129] The cooling ice water and the mixed gas in the water condenser 12 of the present invention flow in the countercurrent direction, thereby increasing the heat exchange temperature difference and reducing the area of ​​the spiral heat exchange tube. The spiral heat exchange tube is prevented from being corroded by using corrosion-resistant materials such as stainless steel.

[0130] The evaporator 82 and the condenser 85 in the ice machine 8 of the present invention both adopt spiral coils for heat exchange, and copper tubes with good heat exchange effect and easy processing are used as heat exchange tubes. The refrigerant of the present invention adopts environmentally friendly R290 or R410A, which has high refrigeration efficiency. The heat discharged by the condensation of the refrigerant of the present invention is used to heat the mixed gas, thereby comprehensively utilizing energy and reducing the cost of waste liquid treatment.

[0131] The utility model can effectively remove harmful components such as various salts, heavy metals and the like in inorganic waste liquid.

[0132] At room temperature, the water in the waste liquid evaporates into gas, preventing the decomposition of harmful components. Salts and heavy metals in the waste liquid precipitate into solid particles, which are then adsorbed by the purification device. The waste liquid is then divided into three parts: the majority is recyclable water, a small portion is expelled as gas with the air, and harmful solid components are adsorbed by the purification device, preventing the generation of new, difficult-to-treat pollutants.

[0133] The following points need to be explained:

[0134] (1) The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention. Other structures may refer to conventional designs.

[0135] (2) For the sake of clarity, the thickness of layers or regions in the drawings used to describe the embodiments of the present invention are exaggerated or reduced, that is, these drawings are not drawn to scale. It is understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, the element may be "directly" "on" or "under" the other element or intervening elements may be present.

[0136] (3) In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0137] The above are only specific implementation methods of the present invention, but the protection scope of the present invention is not limited thereto. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A waste liquid treatment device based on condensed water recovery, characterized in that: It includes a waste liquid pretreatment box, an atomizer, a heater, a gas purifier, a water condenser and an exhaust fan which are connected in sequence; it also includes a water chiller; The ice water machine includes: a condenser, a blower, a compressor, an evaporator and a circulating water pump; The condenser is connected to the heater, the blower sends air into the condenser and performs heat exchange in the condenser to obtain hot air, and the condenser transmits the hot air to the heater; The compressor compresses the refrigerant into a high-temperature, high-pressure gas and transmits it to the condenser for heat exchange with the air introduced by the blower. The refrigerant then changes to a low-temperature, low-pressure liquid and is transmitted to the evaporator. The refrigerant exchanges heat with the liquid in the water condenser in the evaporator. The two ends of the evaporator are respectively connected to the two ends of the spiral heat exchange tube in the water condenser.

2. The waste liquid treatment device based on condensed water recovery according to claim 1 is characterized in that: A pH meter and a liquid level controller are respectively provided on the bottom inner wall of the waste liquid pretreatment box, and a waste liquid delivery pump is provided on the transmission pipeline between the waste liquid treatment box and the atomizer; Wherein, the waste liquid inlet pipeline and the reagent inlet pipeline are connected to the waste liquid pretreatment box; The waste liquid inlet pipeline is used to add the waste liquid to be treated into the waste liquid pretreatment tank; The reagent inlet pipeline is used to add acidic reagent or alkaline reagent into the waste liquid pretreatment box.

3. The waste liquid treatment device based on condensed water recovery according to claim 2 is characterized in that: The waste liquid pretreatment box also includes: a compressed air pipeline, The compressed air pipeline introduces compressed gas into the bottom of the inner cavity of the waste liquid pretreatment box.

4. The waste liquid treatment device based on condensed water recovery according to claim 3 is characterized in that: The atomizer comprises: An atomizer housing is provided with a waste liquid inlet, the waste liquid inlet is connected to the waste liquid delivery pump, an upper flange is welded to the top of the atomizer housing, a lower flange is welded to the bottom of the atomizer housing, an upper cover plate is mounted on the upper flange by bolts, and a lower cover plate is mounted on the lower flange by bolts; a liquid level gauge installed in the inner cavity of the atomizer housing; an air inlet and an air outlet, wherein the air inlet is provided on the inner wall of one side of the atomizer housing and communicates with the inner cavity of the atomizer housing, and the air outlet is provided on the inner wall of the other side of the atomizer housing and communicates with the inner cavity of the atomizer housing; An ultrasonic generator and a power supply, wherein the ultrasonic generator is mounted on the lower cover plate and disposed in the cavity of the atomizer housing, and a pipeline of the ultrasonic generator passes through the atomizer housing and is connected to the power supply; A mounting plate and an atomizing head, wherein the mounting plate is welded to the inner wall of the atomizer housing and is arranged above the ultrasonic generator, a plurality of atomizing heads are evenly arrayed and mounted on the mounting plate, and each atomizing head is respectively connected to the ultrasonic generator.

5. The waste liquid treatment device based on condensed water recovery according to claim 4 is characterized in that: The atomizer further comprises: A spray washer, the spray washer being mounted on the top of the cavity of the atomizer housing; The spray washer comprises: a water inlet pipe, a distribution pipe, a blocking plate and a spray pipe; One end of the water inlet pipe passes through the upper cover plate and is connected to the tap water pipe, and the other end of the water inlet pipe is connected to the distribution pipe, and the blocking plate blocks both ends of the distribution pipe; A plurality of the spray pipes are sequentially installed on the distribution pipe.

6. The waste liquid treatment device based on condensed water recovery according to claim 5 is characterized in that: The spray pipe is a reducing pipe, and the diameter of the inlet end of the spray pipe is larger than the diameter of the outlet end of the spray pipe; The number of the spray pipes is equal to the number of the atomizing heads. Each atomizing head is equipped with a spray pipe, and the spray pipe is arranged directly above the corresponding atomizing head.

7. The waste liquid treatment device based on condensed water recovery according to claim 6 is characterized in that: The air inlet of the heater is connected to the gas outlet of the atomizer, and the air outlet of the heater is connected to the gas purifier; An air inlet is provided at the bottom of the heater, and the heat exchange tube in the heater is connected to the condenser through the air inlet; The heat exchange tube is an internal thread and external fin structure.

8. The waste liquid treatment device based on condensed water recovery according to claim 7 is characterized in that: The gas purifier comprises a filter box, a deacidification box and an adsorption box which are arranged in sequence. The gas entering the gas purifier is filtered, deacidified and adsorbed in sequence.

9. The waste liquid treatment device based on condensed water recovery according to claim 8, characterized in that: The heat exchange tubes in the water condenser are spirally arranged, and both ends of the heat exchange tubes in the water condenser are connected to both ends of the evaporator. A condensate outlet is provided at the bottom of the water condenser, and an exhaust fan is provided at the end of the water condenser away from the gas purifier.

10. The waste liquid treatment device based on condensed water recovery according to claim 1, characterized in that: The refrigerant is R290 or R410a.

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