Waste gas cold and hot energy circulation energy-saving and carbon-reducing system for coating workshop in shipbuilding industry

Abstract

The utility model relates to a shipbuilding industry coating workshop waste gas cold and hot energy circulation energy-saving and carbon-reducing system which comprises an air supply system, organic waste gas treatment equipment, a matched pipeline, a valve and a heat exchanger, and an air inlet pipeline of the organic waste gas treatment equipment is connected with an air supply system pipeline of a coating workshop through the heat exchanger for heat exchange; a heat removal pipeline is led out of an exhaust port of the organic waste gas treatment equipment and connected with a coating room air supply system pipeline through a heat removal pipeline isolating valve. The air supply system is suitable for the coating workshop in the shipbuilding industry, heat energy / cold energy in the coating workshop is recycled through the heat exchange technology, and a dehumidifier matched with the coating workshop can keep the temperature of the coating workshop within the temperature range suitable for operators at low operation energy consumption in the operation stage; in addition, heat of gas at the exhaust port of the organic waste gas treatment equipment is used for replacing a warm air blower, and an auxiliary heat source is provided for the coating room in cold weather.

Description

Technical Field

[0001] The utility model relates to the field of ventilation for a shipbuilding industry painting workshop, in particular to an energy-saving and carbon-reducing system for waste gas cold and hot energy circulation in a shipbuilding industry painting workshop based on heat exchange technology. Background Art

[0002] In recent years, the concept of "green ships" has gradually gained public attention and recognition, driven by the development of the shipbuilding industry. The concepts of energy conservation and carbon reduction permeate every aspect of the shipbuilding process, with ship painting, a major pollutant generator, naturally becoming a key component in implementing this concept.

[0003] Due to the scale of the shipping industry, the annual working hours for ship painting operations at major shipyards generally remain above 300 days, and ship painting operations will arrange for multiple large sections to be operated simultaneously in a single paint room. In addition, due to the large and complex structure of ship sections, their shapes are difficult to unify and standardize, and ship painting operations currently still need to be performed manually. Therefore, during the ship painting working hours, 8-10 or even more people will work together in a single paint room to complete the entire painting process. Because painting operations are carried out throughout the year and the ambient temperature fluctuates greatly, how to provide workers with a stable and comfortable working environment under different seasonal conditions has become a key means for the painting management departments of each shipyard to implement humane management and increase production and efficiency.

[0004] Currently, major shipyards primarily control the temperature within their paint booths by supplying air through large dehumidifiers. These dehumidifiers typically consist of a temperature control module and a humidity control module. The humidity control module controls the humidity within the paint booth to ensure paint quality, while the temperature control module regulates the working temperature within the workshop to provide a comfortable working environment. Some shipyards even have heated air blowers to cope with extreme winter temperatures. The cooling and heating functions of these temperature control devices are all achieved through electric heating. The high load of painting operations increases the energy consumption of these devices, raising shipyard production costs.

[0005] The exhaust systems of ship paint shops in major shipyards are equipped with organic waste gas treatment devices. The principle is to extract the gas in the paint shop, degrade the organic waste gas components through thermal oxidation, and then discharge them. In combination with the process route, the air intake of the organic waste gas treatment equipment comes from the paint shop, and its temperature should be the value closest to the actual needs of the paint shop. If it can be recycled, it can greatly save the energy consumption of the temperature control module of the dehumidifier unit. On the other hand, the waste heat generated by the thermal oxidation of the organic waste gas treatment equipment has the application potential to replace the heater unit as a heat source. Based on the current development status of the industry, on the basis of the existing paint shop temperature control process, it has become an urgent need in the industry to realize the energy saving, emission reduction and carbon reduction of ship painting through appropriate linkage transformation with the exhaust gas treatment device. Summary of the Invention

[0006] The purpose of this utility model is to provide a shipbuilding industry painting workshop exhaust gas cooling and heating energy recycling energy saving and carbon reduction system, by linking the painting room air supply system with the organic waste gas treatment equipment, mainly including the following two aspects:

[0007] First, the temperature of the air extracted from the paint shop must be within the comfortable operating temperature range within the paint shop. By optimizing the supply and exhaust systems in ship paint shops, heat / cold energy can be recovered from the paint shop exhaust, preheating / precooling the shop supply air, and circulating heat / cold energy within the paint shop, saving energy on operating temperature control equipment and achieving carbon reduction goals. Based on this analysis, this system arranges the paint shop supply air ducting and the exhaust ducting at the front end of the organic waste gas treatment equipment closer together through a heat exchanger. This maximizes heat / cold energy recycling and reduces energy consumption in the dehumidifier's temperature control module.

[0008] Secondly, because the organic waste gas treatment equipment uses a thermal oxidation process, its exhaust gas temperature is relatively high (approximately 50-70°C), and its cleanliness level meets relevant emission standards. If this heat can be properly utilized, it can replace the function of the heater blower. Based on the above analysis, this system uses bypass valve control to introduce the high-temperature exhaust gas from the organic waste gas treatment equipment into the paint booth to heat the environment when needed. This eliminates the energy consumption of the heater blower and increases the heat recovery efficiency of the organic waste gas treatment system.

[0009] To achieve the above-mentioned purpose, the technical solution of the utility model is: a shipbuilding industry painting workshop waste gas cold and heat energy circulation energy-saving and carbon reduction system, including an air supply system, organic waste gas treatment equipment, supporting pipelines, valves, and heat exchangers. The air inlet pipeline of the organic waste gas treatment equipment and the painting room air supply system pipeline are connected through a heat exchanger for heat exchange; the exhaust port of the organic waste gas treatment equipment leads to a heat extraction pipeline, and is connected to the painting room air supply system pipeline through a heat extraction pipeline isolation valve.

[0010] Furthermore, the air inlet pipeline of the organic waste gas treatment equipment at the front end of the heat exchanger adopts an external insulation pipeline.

[0011] Furthermore, the internal plate of the heat exchanger is made of corrosion-resistant stainless steel.

[0012] Furthermore, switch valves for controlling on and off are provided on the air inlet pipeline of the organic waste gas treatment equipment and the air supply system pipeline of the painting room.

[0013] Furthermore, the air supply system is provided with a dehumidifier.

[0014] The beneficial effects of the utility model are:

[0015] This utility model is suitable for the air supply system of the paint shop in the shipbuilding industry. The heat energy / cold energy in the paint shop is recycled through heat exchange technology, so that the dehumidifier in the paint shop can maintain the temperature of the paint shop within the temperature range suitable for the operators with lower operating energy consumption during the operation stage; in addition, the system uses the heat of the exhaust gas of the organic waste gas treatment equipment to replace the warm air blower, providing an auxiliary heat source for the paint shop in cold weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a diagram of the energy-saving and carbon-reduction system for waste gas heat and cold energy recycling in the shipbuilding industry paint shop based on heat exchange technology;

[0017] In the figure: 1-heat exchanger, 2-heat extraction pipeline isolation valve, A-with external insulation pipeline, B-without external insulation pipeline. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1 As shown, the present invention proposes a synergistic carbon reduction, energy saving, and efficiency improvement system for organic waste gas treatment equipment in a shipbuilding paint shop based on heat exchange technology, comprising an air supply system, organic waste gas treatment equipment, supporting piping, a heat extraction pipeline isolation valve 2, a heat exchanger 1, and the like. (The air supply system and organic waste gas treatment equipment utilize existing technologies.)

[0020] The air inlet pipeline of the organic waste gas treatment equipment (the part before the pre-filter) and the air supply system pipeline of the coating room are connected through the heat exchanger 1 for heat exchange.

[0021] By placing the air supply system pipeline of the painting room close to the exhaust pipeline at the front end of the organic waste gas treatment equipment and performing heat exchange through the heat exchanger 1, the heat / cold capacity can be recycled to the greatest extent, which can save the operating energy consumption of the dehumidifier temperature control module.

[0022] A heat extraction pipeline is led from the exhaust port of the organic waste gas treatment equipment and connected to the paint booth's air supply pipeline via heat extraction pipeline isolation valve 2. Controlled by heat extraction pipeline isolation valve 2, high-temperature exhaust from the organic waste gas treatment equipment is introduced into the paint booth to heat the environment when needed. This eliminates the energy consumption of the warm air blower and increases the heat recovery efficiency of the organic waste gas treatment system.

[0023] Preferably, the air inlet pipeline of the organic waste gas treatment equipment at the front end of the heat exchanger 1 is subjected to external insulation treatment (with external insulation pipeline A).

[0024] Preferably, the internal plate of the heat exchanger 1 is made of corrosion-resistant stainless steel to reduce the corrosive effect of organic waste gas on the internal structure of the heat exchanger.

[0025] Preferably, the pipeline is opened and closed by a switch valve.

[0026] The system operates according to the following control method:

[0027] When painting in summer (when the outside temperature is high), the system operates as follows:

[0028] The air supply system and organic waste gas treatment equipment in the painting room are started. The air intake of the air supply system and the air intake of the exhaust system exchange heat through the heat exchanger, and the cold air of the exhaust system in the workshop is transferred to the air supply system. The supply air then enters the dehumidifier for subsequent dehumidification and temperature adjustment, reducing the energy consumption of the dehumidifier temperature control module.

[0029] When painting in winter (when the outside temperature is low), the system operates as follows:

[0030] The air supply system and organic waste gas treatment equipment in the painting room are started. The air supply system intake and exhaust system intake exchange heat through the heat exchanger, transferring the heat of the exhaust system in the workshop to the air supply system. The air supply gas then enters the dehumidifier for subsequent dehumidification and temperature adjustment, reducing the energy consumption of the dehumidifier temperature control module;

[0031] When the temperature in the workshop is low and heat supplement is needed, the valve of the heat extraction pipeline is opened, and the exhaust heat of the organic waste gas treatment equipment provides a supplementary heat source for the air supply system, saving energy costs incurred in purchasing, installing and operating the heating unit.

[0032] Example:

[0033] The rated air volume of the organic waste gas treatment equipment in the painting workshop of a shipyard is 120,000m 3 / h, the rated air volume of the air supply system is 90% of the exhaust volume (108000m 3 / h). The paint room's supply and exhaust ducting is arranged according to the aforementioned heat exchange-based waste gas cooling and heating recycling energy-saving and carbon-reduction system for shipbuilding paint shops. The entire air supply system significantly reduces annual energy consumption compared to traditional air supply systems. On the one hand, the waste heat from the organic waste gas treatment equipment replaces the heater unit, providing the system with additional heat for winter operation. On the other hand, the dehumidifier's inlet air utilizes the cooling and heating sources of the organic waste gas treatment equipment's inlet air, significantly reducing energy consumption in the dehumidifier's temperature control module.

[0034] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

Claims

1. A shipbuilding industry paint shop exhaust gas cold and heat energy circulation energy saving and carbon reduction system, characterized by: It includes an air supply system, organic waste gas treatment equipment, supporting pipelines, valves, and heat exchangers. The air inlet pipeline of the organic waste gas treatment equipment is connected to the air supply system pipeline of the painting room through a heat exchanger for heat exchange; the heat extraction pipeline is led out from the exhaust port of the organic waste gas treatment equipment and connected to the air supply system pipeline of the painting room through a heat extraction pipeline isolation valve.

2. The shipbuilding industry coating workshop exhaust gas cold and heat energy circulation energy saving and carbon reduction system according to claim 1 is characterized by: The air inlet pipeline of the organic waste gas treatment equipment at the front end of the heat exchanger adopts an external insulation pipeline.

3. The shipbuilding industry coating workshop exhaust gas cold and heat energy circulation energy saving and carbon reduction system according to claim 1 is characterized by: The internal plate of the heat exchanger is made of corrosion-resistant stainless steel.

4. The shipbuilding industry coating workshop exhaust gas cold and heat energy circulation energy saving and carbon reduction system according to claim 1 is characterized by: The air inlet pipeline of the organic waste gas treatment equipment and the air supply system pipeline of the painting room are equipped with switch valves for controlling on and off.

5. The shipbuilding industry coating workshop exhaust gas cold and heat energy circulation energy saving and carbon reduction system according to claim 1 is characterized by: The air supply system is equipped with a dehumidifier.

Images