Energy-saving spray booth with waste heat recovery system and water circulation system

Abstract

The utility model discloses an energy -conserving spray room with waste heat recovery system and water circulation system, including spray room body, inside is provided with water screen, air intake system, exhaust system and bottom wastewater collection pond, air intake system includes air intake pipeline and heating component, exhaust system includes air outlet pipeline, waste heat recovery system includes heat exchanger, and the air outlet pipeline of exhaust system is connected the air outlet pipeline of exhaust system through air outlet pipeline of the exhaust side of heat exchanger, and the air intake system is connected the air intake system through air intake pipeline of new air side, to recover exhaust waste heat preheats the air intake, water circulation system includes water treatment unit, wastewater pipeline and circulating water pipeline, and the input of water treatment unit is connected spray room bottom wastewater collection pond through wastewater pipeline, and the output of water treatment unit is connected with the water inlet communication of water screen through circulating water pipeline, is used for respectively back -feed to water screen circulation use after the water of purification, realizes waste heat recycling and the circulation use of water resources, reduces energy consumption and environmental pollution.

Description

Technical Field

[0001] This utility model relates to the field of spray booth technology, and in particular to an energy-saving spray booth equipped with a waste heat recovery system and a water circulation system. Background Technology

[0002] During spray booth operations, a significant amount of waste heat and wastewater are generated. Traditional spray booths typically discharge the hot air directly to the outside, resulting in energy waste. Furthermore, the direct discharge of untreated wastewater not only pollutes the environment but also increases water consumption. Therefore, effectively recovering waste heat and treating wastewater has become a pressing issue in the spray booth industry. Utility Model Content

[0003] Purpose of the invention: The purpose of this utility model is to provide an energy-saving spray booth equipped with a waste heat recovery system and a water circulation system, so as to solve the problems of energy waste and wastewater pollution in existing spray booths, realize the recovery and utilization of waste heat and the recycling of water resources, and reduce energy consumption and environmental pollution.

[0004] Technical solution:

[0005] An energy-saving spray booth equipped with a waste heat recovery system and a water circulation system, including

[0006] The spray booth itself is equipped with a water curtain, an air intake system, an exhaust system, and a wastewater collection tank at the bottom.

[0007] The air intake system includes an air intake duct and a heating component;

[0008] The exhaust system includes an exhaust duct;

[0009] The waste heat recovery system includes a heat exchanger, wherein the exhaust side of the heat exchanger is connected to the outlet duct of the exhaust system through an exhaust duct, and the fresh air side is connected to the inlet system through an inlet duct, so as to recover the waste heat of the exhaust air to preheat the inlet air.

[0010] The water circulation system includes a water treatment unit, a wastewater pipeline, and a circulating water pipeline. The input end of the water treatment unit is connected to the wastewater collection tank at the bottom of the spray booth through the wastewater pipeline, and the output end of the water treatment unit is connected to the inlet of the water curtain through the circulating water pipeline, which is used to return the purified water to the water curtain for recycling.

[0011] Furthermore, the water treatment unit comprises the following components connected in sequence:

[0012] The primary filtration module is used to intercept impurities with a particle size greater than 1mm;

[0013] The cyclone separation module separates particles with a diameter of 0.1–1 mm using centrifugal force;

[0014] Precision filtration module, used to trap pollutants with a particle size of less than 0.1 mm.

[0015] Furthermore, the primary filtration module is a primary filter, which has a metal screen or filter cloth with a pore size greater than 1 mm inside. The screen or filter cloth can be detachably installed in the filtration chamber to intercept impurities such as paint residue and large dust particles.

[0016] Furthermore, the cyclone separation module is a cyclone separator, which includes a cylindrical body and a conical container. The top of the cylindrical body is provided with a tangential water inlet, and the bottom is connected to the conical container. The bottom of the conical container is provided with a slag discharge port, and the top is provided with a water outlet.

[0017] Furthermore, the precision filtration module is a precision filter, and the precision filter is internally equipped with an activated carbon filtration component or an ultrafiltration membrane component with a pore size ≤0.01μm.

[0018] Furthermore, flow regulating valves are installed on the wastewater pipeline and the circulating water pipeline.

[0019] Furthermore, the heating component is a resistance wire heating element.

[0020] Furthermore, the heat exchanger is one of a plate heat exchanger, a rotary heat exchanger, or a heat pipe heat exchanger.

[0021] Beneficial effects:

[0022] 1. By using a waste heat recovery system, the waste heat from the exhaust gas is used to preheat the intake air, which reduces the energy consumption of the heating components and improves energy utilization efficiency.

[0023] 2. The water circulation system treats and recycles the wastewater from the spray booth, reducing water consumption and minimizing environmental pollution from wastewater discharge. The water treatment unit employs a multi-stage filtration system, which effectively removes impurities and pollutants of different particle sizes from the wastewater, ensuring the quality of the circulating water. Attached Figure Description

[0024] Figure 1 This is a perspective view of the present invention;

[0025] Figure 2 This is an internal schematic diagram of the present invention;

[0026] Figure 3 This is an internal structural diagram of the water treatment unit of this utility model;

[0027] Figure 4 This is a diagram showing the water flow direction of the water treatment unit of this utility model. Detailed Implementation

[0028] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] like Figure 1-4 As shown, an energy-saving spray booth equipped with a waste heat recovery system and a water circulation system includes...

[0031] The spray booth body 100 is equipped with a water curtain 101, an air intake system 102, an exhaust system 103, and a bottom wastewater collection tank 104.

[0032] The air intake system 102 includes an air intake duct and a heating component;

[0033] The exhaust system 103 includes an exhaust duct;

[0034] The waste heat recovery system includes a heat exchanger 1. The exhaust side of the heat exchanger 1 is connected to the outlet duct of the exhaust system 103 through an exhaust duct, and the fresh air side is connected to the inlet system 102 through an inlet duct, so as to recover the waste heat of the exhaust air to preheat the inlet air.

[0035] The water circulation system includes a water treatment unit 4, a wastewater pipeline and a circulating water pipeline. The input end of the water treatment unit 4 is connected to the wastewater collection tank 104 at the bottom of the spray booth through the wastewater pipeline. The output end of the water treatment unit 4 is connected to the inlet of the water curtain 101 through the circulating water pipeline 5, which is used to return the purified water to the water curtain 101 for recycling.

[0036] The water curtain 101 plays an important role in air purification and dust reduction within the spray booth. When the spray booth is in operation, a large amount of paint mist and dust are generated. The water in the water curtain 101 can absorb this paint mist and dust, causing some harmful substances to flow down to the bottom of the spray booth with the water, thereby reducing the pollutant content in the air inside the spray booth and improving the working environment.

[0037] Air Intake System 102: The air intake system 102 includes an air intake duct and a heating component. The air intake duct is responsible for introducing fresh air from outside into the spray booth to ensure sufficient oxygen supply and maintain a normal spraying environment. The heating component uses a resistance wire heating element, which heats the incoming fresh air to a suitable temperature. In practical applications, depending on different spraying processes and environmental requirements, the heating power of the resistance wire can be controlled by adjusting the current, thereby precisely controlling the air temperature entering the spray booth and ensuring the stability of the spraying effect.

[0038] The exhaust system 103 includes exhaust ducts, and its main function is to exhaust the waste gas from the spray booth after use. During the spraying process, various volatile organic compounds (VOCs) and other harmful gases are generated.

[0039] The exhaust system 103 discharges these exhaust gases from the spray booth through exhaust ducts to ensure that the air quality inside the spray booth meets safety standards. The bottom wastewater collection tank 104, located at the bottom of the spray booth body, collects the wastewater formed after the water curtain 101 absorbs paint mist and dust. This wastewater contains impurities such as paint residue and dust, and direct discharge would pollute the environment. Therefore, the bottom wastewater collection tank 104 serves as a temporary storage tank for the wastewater, facilitating subsequent water treatment.

[0040] The waste heat recovery system mainly consists of heat exchanger 1. The exhaust side of heat exchanger 1 is connected to the outlet duct of exhaust system 103 via an exhaust duct, while the fresh air side is connected to inlet system 102 via an inlet duct. When exhaust gas from the spray booth is discharged through the outlet duct of exhaust system 103, the heat carried by the exhaust gas enters the exhaust side of heat exchanger 1. Simultaneously, fresh air from the outside enters the fresh air side of heat exchanger 1 through the inlet duct. Inside heat exchanger 1, heat is transferred between exhaust gas and fresh air through heat exchange, with the waste heat of the exhaust gas being transferred to the fresh air, thus preheating the fresh air. The preheated fresh air then enters the heating components of inlet system 102 for further heating. Since the fresh air has already been preheated, the energy required by the heating components is correspondingly reduced, thereby achieving waste heat recovery and utilization, and reducing the energy consumption of the entire spray booth system.

[0041] Furthermore, the water treatment unit 4 includes the following components connected in sequence:

[0042] The primary filtration module is used to intercept impurities with a particle size greater than 1mm;

[0043] The cyclone separation module separates particles with a diameter of 0.1–1 mm using centrifugal force;

[0044] Precision filtration module, used to trap pollutants with a particle size of less than 0.1 mm.

[0045] Furthermore, the primary filtration module is a primary filter 41, which has a metal screen or filter cloth with a pore size greater than 1 mm inside. The screen or filter cloth can be detachably installed in the filtration chamber to intercept impurities such as paint residue and large dust particles.

[0046] Furthermore, the cyclone separation module is a cyclone separator 42, which includes a cylindrical body and a conical container. The top of the cylindrical body has a tangential inlet, and the bottom is connected to the conical container. The bottom of the conical container has a slag discharge port, and the top has a water outlet. When the wastewater that has passed the primary filtration enters the cylindrical body of the cyclone separator 42 at a certain speed through the tangential inlet, the wastewater will form a rotating water flow inside the cylinder. Under the action of centrifugal force, particles with a diameter of 0.1-1mm will be thrown against the cylinder wall and move downwards along the cylinder wall, eventually being discharged through the slag discharge port at the bottom of the conical container. The relatively clean water flows out from the water outlet at the top of the conical container and enters the next filtration stage.

[0047] Furthermore, the precision filtration module is a precision filter 43, which contains an activated carbon filter assembly or an ultrafiltration membrane assembly with a pore size ≤0.01μm. After the wastewater undergoes cyclone separation and enters the precision filter 43, the activated carbon filter assembly can adsorb organic matter, odors, and some heavy metal ions in the water; the ultrafiltration membrane assembly can retain tiny pollutants with a particle size of less than 0.1mm, such as bacteria, viruses, and colloids, further improving the water purification level.

[0048] Furthermore, flow regulating valves are installed on the wastewater pipeline and the circulating water pipeline.

[0049] Furthermore, the heating component is a resistance wire heating element.

[0050] Furthermore, the heat exchanger 1 is one of a plate heat exchanger, a rotary heat exchanger, or a heat pipe heat exchanger. Different types of heat exchangers have their own characteristics and applicable scenarios. For example, plate heat exchangers have the advantages of compact structure and high heat transfer efficiency, making them suitable for applications with high space requirements; rotary heat exchangers have a large heat exchange area and high heat storage capacity, enabling continuous and stable heat exchange; heat pipe heat exchangers have the characteristics of fast heat transfer speed and low thermal resistance, performing excellently in some applications requiring high heat exchange efficiency. In practical applications, the appropriate type of heat exchanger can be selected based on factors such as the specific size of the spray booth, operating parameters, and economic costs.

[0051] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An energy-saving spray booth equipped with a waste heat recovery system and a water circulation system, characterized in that, include The spray booth body (100) is equipped with a water curtain (101), an air intake system (102), an exhaust system (103), and a bottom wastewater collection tank (104). The air intake system (102) includes an air intake duct and a heating component; The exhaust system (103) includes an exhaust duct; The waste heat recovery system includes a heat exchanger (1), the exhaust side of the heat exchanger (1) is connected to the outlet pipe of the exhaust system (103) through an exhaust pipe, and the fresh air side is connected to the inlet system (102) through an inlet pipe, so as to recover the waste heat of the exhaust air and preheat the inlet air; The water circulation system includes a water treatment unit (4), a wastewater pipeline and a circulating water pipeline. The input end of the water treatment unit (4) is connected to the wastewater collection tank (104) at the bottom of the spray booth through the wastewater pipeline. The output end of the water treatment unit (4) is connected to the inlet of the water curtain (101) through the circulating water pipeline (5) to return the purified water to the water curtain (101) for recycling.

2. The energy-saving spray booth with a waste heat recovery system and a water circulation system according to claim 1, characterized in that, The water treatment unit (4) comprises the following components connected in sequence: The primary filtration module is used to intercept impurities with a particle size greater than 1mm; The cyclone separation module separates particles with a diameter of 0.1–1 mm using centrifugal force; Precision filtration module, used to trap pollutants with a particle size of less than 0.1 mm.

3. An energy-saving spray booth with a waste heat recovery system and a water circulation system according to claim 2, characterized in that, The primary filtration module is a primary filter (41), which has a metal screen or filter cloth with a pore size greater than 1 mm inside. The screen or filter cloth can be detachably installed in the filter chamber to intercept impurities such as paint residue and large dust particles.

4. An energy-saving spray booth with a waste heat recovery system and a water circulation system according to claim 2, characterized in that, The cyclone separation module is a cyclone separator (42), which includes a cylindrical body and a conical container. The top of the cylindrical body is provided with a tangential water inlet, and the bottom is connected to the conical container. The bottom of the conical container is provided with a slag discharge port, and the top is provided with a water outlet.

5. An energy-saving spray booth with a waste heat recovery system and a water circulation system according to claim 2, characterized in that, The precision filtration module is a precision filter (43), and the precision filter (43) is internally equipped with an activated carbon filtration component or an ultrafiltration membrane component with a pore size ≤0.01μm.

6. An energy-saving spray booth with a waste heat recovery system and a water circulation system according to claim 1, characterized in that, The wastewater pipeline and circulating water pipeline are equipped with flow regulating valves.

7. An energy-saving spray booth with a waste heat recovery system and a water circulation system according to claim 1, characterized in that, The heating component is a resistance wire heating element.

8. An energy-saving spray booth with a waste heat recovery system and a water circulation system according to claim 1, characterized in that, The heat exchanger (1) is one of a plate heat exchanger, a rotary heat exchanger, or a heat pipe heat exchanger.

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