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

Abstract

The invention 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. According to the air supply system suitable for the coating workshop in the shipbuilding industry, heat energy / cold energy in the coating workshop is recycled through the heat exchange technology, so that 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 interior of the coating room in cold weather.

Description

Technical Field

[0001] The invention relates to the field of shipbuilding industry painting workshop ventilation, in particular to a shipbuilding industry painting workshop exhaust gas cold and heat energy circulation energy saving and carbon reduction system based on heat exchange technology. Background Art

[0002] In recent years, the concept of "green ship" has gradually attracted attention and attention from all walks of life with the development of the shipbuilding industry. The concepts of "energy saving" and "carbon reduction" run through every link in the shipbuilding process. Among them, ship painting, as a link where pollutants are concentrated, naturally becomes the key link in the implementation of the concept of "green ship".

[0003] Based on the size of the shipbuilding industry, the annual working hours of ship painting operations in major shipyards generally remain above 300 days, and ship painting operations will arrange multiple large sections to work simultaneously in one painting 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 work period, there will be 8-10 or even more people in a single painting room to cooperate to complete the entire painting process. Since painting operations run throughout the four seasons and the ambient temperature varies greatly, how to provide operators with a stable and comfortable working environment under different seasonal conditions has become an important means for the painting management departments of various shipyards to implement humanized management and increase production and efficiency.

[0004] At present, major shipyards mainly control the temperature inside the paint room by supplying air to the paint room with large dehumidifiers. This type of dehumidifier is generally divided into a temperature control module and a humidity control module. The humidity in the paint room is controlled by the humidity control module to ensure the quality of the paint, and the working temperature in the workshop is controlled by the temperature control module to provide a comfortable working environment. Some shipyards are even equipped with warm air blowers to cope with extremely low temperatures in winter. The cooling / heating functions of the above temperature control equipment are all achieved through electric heating. The high-load painting operation increases the energy consumption of this type of equipment and increases the production cost of the shipyard.

[0005] The exhaust system of the ship painting room in each major shipyard is equipped with an organic waste gas treatment device. The principle is to extract the gas in the painting room, degrade the organic waste gas components by thermal oxidation, and then discharge them. Combined with the process route, the air intake of the organic waste gas treatment equipment comes from the painting workshop, and its temperature should be the value closest to the actual demand of the painting workshop. 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 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 temperature regulation process of the painting room, 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 machine exhaust gas treatment device. Summary of the invention

[0006] The purpose of the present invention is to provide a shipbuilding industry painting workshop waste gas cold and heat energy circulation 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 of all, the temperature of the gas extracted from the paint shop meets the comfortable operating temperature range in the paint shop. By optimizing the air supply and exhaust system of the ship paint shop, the heat / cold in the paint shop exhaust can be recovered, and the workshop supply air can be preheated / precooled to achieve the heat / cold cycle in the paint shop, saving the operating energy consumption of the temperature control equipment and achieving the carbon reduction target. Based on the above analysis, this system arranges the paint shop air supply pipeline and the front-end exhaust pipeline of the organic waste gas treatment equipment close to each other through pipeline layout, and exchanges heat through a heat exchanger. Reusing heat / cold to the greatest extent can save the operating energy consumption of the dehumidifier temperature control module.

[0008] Secondly, since the organic waste gas treatment equipment adopts thermal oxidation process, the exhaust gas temperature is relatively high (about 50-70℃), and the cleanliness can meet the relevant emission standards. If this part of heat can be properly utilized, it can replace the function of the warm air blower. Based on the above analysis, this system controls the bypass valve to introduce the high-temperature exhaust gas of the organic waste gas treatment equipment into the coating room to heat the environment when necessary. The energy consumption of the warm air blower is saved, and the heat recovery efficiency of the organic waste gas treatment system is increased.

[0009] To achieve the above-mentioned purpose, the technical solution of the present invention 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, matching pipelines, valves, and heat exchangers. The air inlet pipeline of the organic waste gas treatment equipment is connected to the painting room air supply system pipeline through a heat exchanger for heat exchange; the organic waste gas treatment equipment exhaust port 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 plates of the heat exchanger are made of corrosion-resistant stainless steel to reduce the corrosive effects of organic waste gas on the internal structure of the heat exchanger.

[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] An operation control method for an exhaust gas cold and heat energy circulation energy saving and carbon reduction system in a shipbuilding industry painting workshop, comprising:

[0015] When painting in summer: 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, and the cold air of the exhaust system in the painting room is transferred to the air supply system, and then the air supply gas enters the dehumidifier for subsequent dehumidification and temperature adjustment;

[0016] When painting in winter: the air supply system and organic waste gas treatment equipment in the painting room are started, the air supply system intake and the exhaust system intake are heat exchanged through the heat exchanger, and the heat of the exhaust system in the workshop is transferred to the air supply system, and then the air supply gas enters the dehumidifier for subsequent dehumidification and temperature adjustment;

[0017] 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 is used to provide a supplementary heat source for the air supply system.

[0018] The beneficial effects of the present invention are:

[0019] The present invention is applicable to the air supply system of the paint shop in the shipbuilding industry. The heat energy / cold energy in the paint shop is recycled through the heat exchange technology, so that the dehumidifier in the paint shop can keep the temperature of the paint room within the suitable temperature range 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 room in cold weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a diagram of the energy-saving and carbon-reduction system for waste gas heat and cold energy circulation in the shipbuilding industry painting workshop based on heat exchange technology;

[0021] In the figure: 1-heat exchanger, 2-heat extraction pipeline isolation valve, A-with external insulation pipeline, B-without external insulation pipeline. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 1 As shown, an embodiment of the present invention proposes a coordinated carbon reduction, energy saving and efficiency improvement system for organic waste gas treatment equipment in a shipbuilding industry painting workshop based on heat exchange technology, including an air supply system, organic waste gas treatment equipment, supporting pipelines, a heat extraction pipeline isolation valve 2, a heat exchanger 1, etc.

[0024] 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.

[0025] The air supply system pipeline of the coating room is brought close to the exhaust pipeline at the front end of the organic waste gas treatment equipment, and heat exchange is performed through the heat exchanger 1 to maximize the recycling of heat / cold energy, which can save the operating energy consumption of the dehumidifier temperature control module.

[0026] The heat extraction pipeline is led out from the outlet of the organic waste gas treatment equipment, and is connected to the air supply pipeline of the painting room through the heat extraction pipeline isolation valve 2. Through the control of the heat extraction pipeline isolation valve 2, the high-temperature exhaust gas of the organic waste gas treatment equipment is introduced into the painting room to heat the environment when necessary. The energy consumption of the warm air blower is saved, and the heat recovery efficiency of the organic waste gas treatment system is increased.

[0027] 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).

[0028] Preferably, the internal plate of the heat exchanger 1 is made of corrosion-resistant stainless steel to reduce the corrosion effect of organic waste gas on the internal structure of the heat exchanger.

[0029] Preferably, the pipeline is opened and closed by a switch valve.

[0030] The system operates according to the following control method:

[0031] When painting in summer (when the outside temperature is high), the system operates as follows:

[0032] 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. Then the supply air enters the dehumidifier for subsequent dehumidification and temperature adjustment, reducing the energy consumption of the dehumidifier temperature control module.

[0033] When painting in winter (when the outside temperature is low), the system operates as follows:

[0034] The air supply system and organic waste gas treatment equipment in the painting room are started, and 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, and then the air supply gas enters the dehumidifier for subsequent dehumidification and temperature adjustment, reducing the energy consumption of the dehumidifier temperature control module. ;

[0035] 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 is used to provide a supplementary heat source for the air supply system, saving energy consumption costs in purchasing, installing and operating the heating unit.

[0036] Example:

[0037] The design rated air volume of the organic waste gas treatment equipment in a shipyard painting workshop is 120000m 3 / h, the rated air volume of the air supply system is 90% of the exhaust volume (108000m 3 / h). The air supply and exhaust ducts in the painting room are arranged according to the above-mentioned shipbuilding industry painting workshop waste gas cold and heat energy circulation energy-saving and carbon reduction system based on heat exchange technology. The annual energy consumption of the entire air supply system is significantly reduced compared with the traditional air supply system. On the one hand, the waste heat of the organic waste gas treatment equipment replaces the heating unit to provide the system with additional heat source required for winter operation; on the other hand, the dehumidifier air intake utilizes the cold / heat source of the organic waste gas equipment air intake, which greatly reduces the energy consumption of the dehumidifier temperature control module.

[0038] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the 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.

Claims

1. A shipbuilding industry painting workshop waste gas cold and heat energy circulation energy saving and carbon reduction system, Features: 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 pipeline of the air supply system 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 pipeline of the air supply system of the painting room through a heat extraction pipeline isolation valve.

2. The shipbuilding industry coating workshop waste gas cold and heat energy circulation energy saving and carbon reduction system according to claim 1, Features: 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 waste gas cold and heat energy circulation energy saving and carbon reduction system according to claim 1, Features: The internal plates of the heat exchanger are made of corrosion-resistant stainless steel to reduce the corrosion effect of organic waste gas on the internal structure of the heat exchanger.

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

6. An operation control method for the shipbuilding industry coating workshop exhaust gas cold and heat energy circulation energy saving and carbon reduction system according to any one of claims 1 to 5, It is characterized in that include: When painting in summer: 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, and the cold air of the exhaust system in the painting room is transferred to the air supply system, and then the air supply gas enters the dehumidifier for subsequent dehumidification and temperature adjustment; When painting in winter: the air supply system and organic waste gas treatment equipment in the painting room are started, the air supply system intake and the exhaust system intake are heat exchanged through the heat exchanger, and the heat of the exhaust system in the workshop is transferred to the air supply system, and then the air supply gas enters the dehumidifier for subsequent dehumidification and temperature adjustment; 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 is used to provide a supplementary heat source for the air supply system.

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