Waste gas incineration waste heat power generation system
By using a waste heat power generation system through waste gas incineration, the problems of equipment blockage and energy waste in the treatment of large particulate matter and sticky substances in the exhaust gas have been solved, achieving efficient energy recovery and economic benefits while meeting environmental protection requirements.
Patent Information
- Application Number
- CN202522358615.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-06
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-11-06
AI Technical Summary
In existing technologies, regenerative combustion and direct combustion devices are prone to equipment blockage when treating exhaust gases containing large particles or sticky substances, resulting in increased resistance of the heat storage body and high operating costs; while direct combustion devices cannot effectively recover heat, leading to energy waste.
The waste gas incineration waste heat power generation system includes components such as a cyclone dust collector, waste gas incinerator, high-temperature fan, waste heat boiler, steam turbine and generator. It directly burns off large particulate matter and sticky substances in the exhaust gas, and introduces the high-temperature flue gas into the waste heat boiler to generate electricity, thereby realizing the recovery and utilization of heat energy.
It achieves efficient treatment of exhaust gases containing large particulate matter and viscous substances, reduces operating costs, improves energy utilization efficiency, meets environmental protection requirements, and creates economic benefits.
Smart Images
Figure CN224944804U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste heat recovery technology, and in particular to a waste heat power generation system for waste gas incineration. Background Technology
[0002] With the development of volatile organic compound (VOCs) treatment technologies, regenerative thermal combustion (RTO), regenerative catalytic combustion (RCO), and direct combustion (TO) technologies have emerged.
[0003] In related technologies, regenerative thermal combustion (RTO) and regenerative catalytic combustion (RCO) devices are commonly used for the treatment of VOCs. These devices store and reuse combustion heat through heat storage to reduce energy consumption. Direct combustion (TO) devices, on the other hand, use high-temperature direct combustion, which does not require heat storage and is suitable for treating exhaust gases containing large particulate matter or sticky substances, as well as exhaust gases with low concentration, large volume and low calorific value.
[0004] However, the aforementioned regenerative thermal combustion (RTO) and regenerative catalytic combustion (RCO) methods are unsuitable for treating exhaust gases containing large particles or sticky substances. They can easily lead to blockage of the heat storage medium, increased equipment resistance, and reduced efficiency and service life. At the same time, for exhaust gases with low concentration, large volume, and low calorific value, additional fuel is required, resulting in high operating costs and poor economic efficiency. Direct combustion (TO) devices, on the other hand, cannot effectively recover heat due to the direct emission of high-temperature exhaust gases, leading to energy waste and energy inefficiency. Utility Model Content
[0005] In response to the shortcomings of the existing production technologies, the applicant provides a waste gas incineration waste heat power generation system, which fully utilizes the advantages of TO waste gas incinerators in treating large particulate matter, sticky substances, and low-concentration, high-volume waste gas, and fully recovers and utilizes the waste heat from the high-temperature flue gas generated by incineration, making it more energy-efficient and environmentally friendly.
[0006] The technical solution adopted in this utility model is as follows: A waste gas incineration waste heat power generation system, comprising: The production equipment has its exhaust outlet connected to the inlet of a cyclone dust collector via a pipeline, and the outlet of the cyclone dust collector is connected to the inlet of an exhaust gas incinerator via a pipeline. The flue gas outlet of the waste gas incinerator is connected to the inlet of the high-temperature fan through a pipeline. The outlet of the high-temperature fan is divided into two paths through a pipeline, one path connecting to the flue gas inlet of the waste heat boiler and the other path connecting to the flue gas inlet of the heat-using equipment. The flue gas outlet of the waste heat boiler and the flue gas outlet of the heat-using equipment are connected to the inlet of the bag filter through pipelines. The outlet of the bag filter is connected to the inlet of the main induced draft fan via a pipeline, and the outlet of the main induced draft fan is connected to the chimney via a pipeline. The steam outlet of the waste heat boiler is connected to the steam inlet of the steam turbine via a pipeline, and the output shaft of the steam turbine is connected to the generator. The exhaust port of the steam turbine is connected to the inlet of the condenser via a pipeline; The outlet of the condenser is connected to the inlet of the regenerator via a condensate pump, and the outlet of the regenerator is connected to the inlet of the economizer of the waste heat boiler via a feedwater pump.
[0007] As a further improvement to the above technical solution: In one embodiment, the waste gas incinerator is configured to heat the waste gas to above 750°C.
[0008] In one embodiment, the waste gas incinerator is a TO waste gas incinerator.
[0009] In one embodiment, the waste heat boiler includes a superheater, an evaporator, and an economizer, with the flue gas inlet of the waste heat boiler sequentially connected to the superheater, the evaporator, and the economizer.
[0010] In one embodiment, the economizer outlet is connected to a steam drum, the steam drum is connected to the evaporator inlet via a downcomer, the evaporator outlet is connected to the steam drum, and the steam drum steam outlet is connected to the superheater inlet.
[0011] In one embodiment, the outlet of the high-temperature fan is connected to the waste heat boiler and the heat-using equipment respectively via branch pipes or tee joints.
[0012] In one embodiment, the power output terminal of the generator is connected to the plant's electrical equipment, energy storage device, or power grid.
[0013] In one embodiment, the heat-using device is a heat exchange device for heating clean materials.
[0014] In one embodiment, a regeneration device is also included, which is disposed between the condensate pump and the feed water pump for heating the condensate.
[0015] The beneficial effects of this utility model are as follows: This utility model has a compact structure and uses a direct combustion furnace to treat waste gas, ensuring its wide adaptability to large particles, viscous substances, and low-concentration, high-volume waste gas. At the same time, the generated high-temperature flue gas is introduced into a waste heat boiler power generation system, converting the originally wasted heat energy into electrical energy. This fundamentally changes the traditional perception that direct combustion technology is "inevitably high-energy-consuming," and realizes the efficient treatment of the most difficult industrial waste gas while also recovering energy and creating economic benefits.
[0016] This utility model also has the following advantages: This invention uses pipeline design to divert high-temperature flue gas, with one part sent to the heat-using equipment in the factory for direct heating, and the other part sent to the waste heat boiler for power generation. This makes the overall energy utilization efficiency of the system high and avoids the energy waste that may be caused by single power generation or single heating.
[0017] In the waste gas treatment process, this utility model sets up a cyclone dust collector and a bag filter dust collector before and after the incinerator, respectively. The cyclone dust collector at the front removes large particles that may wear or clog subsequent pipes and equipment; the bag filter dust collector at the back performs fine filtration on the cooled flue gas after heat recovery, removing fine particles that may remain after combustion. This protects the core power equipment such as the waste heat boiler and steam turbine from wear and tear, and ensures the cleanliness of the flue gas finally discharged into the atmosphere, meeting strict environmental protection requirements.
[0018] This invention incorporates a regenerative device to preheat the circulating water, reducing the heat required to heat the feedwater in the waste heat boiler, thereby improving the thermal efficiency of the entire power generation system and further amplifying the energy-saving effect. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0020] Figure 2 This is a schematic diagram of the internal structure of the waste heat boiler of this utility model.
[0021] The components are as follows: 100. Production equipment; 200. Cyclone dust collector; 300. Waste gas incinerator; 400. High-temperature fan; 500. Waste heat boiler; 600. Heat-using equipment; 700. Steam turbine; 800. Generator; 900. Baghouse dust collector; 1000. Main induced draft fan; 1100. Chimney; 1200. Condenser; 1300. Condensate pump; 1400. Regenerative device; 1500. Feed water pump. 510. Superheater; 520. Evaporator; 530. Economizer. Detailed Implementation
[0022] The specific embodiments of this utility model are described below with reference to the accompanying drawings.
[0023] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.
[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0025] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.
[0026] It should be understood that although the terms "first," "second," etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.
[0027] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.
[0028] like Figures 1-2 The accompanying drawing shows a schematic diagram of the structural state of a waste gas incineration waste heat power generation system according to an embodiment of the present invention; for ease of description, the drawing only shows the structure related to the embodiment of the present invention.
[0029] like Figure 1 As shown, this embodiment provides a waste gas incineration waste heat power generation system, including production equipment 100, cyclone dust collector 200, waste gas incinerator 300, high-temperature fan 400, waste heat boiler 500, heat-using equipment 600, steam turbine 700, generator 800, bag filter 900, main induced draft fan 1000, and chimney 1100; in addition, it also includes condenser 1200, condensate pump 1300, regeneration device 1400, and feedwater pump 1500, which are used to form a complete steam power cycle.
[0030] Combination Figure 2 As shown, the waste heat boiler 500 further includes a superheater 510, an evaporator 520, and an economizer 530.
[0031] In some embodiments, the production equipment 100 generates industrial waste gas during the production process, and the waste gas is transported to the inlet of the cyclone dust collector 200 through pipelines; Cyclone dust collector 200 uses centrifugal force to separate and remove larger particles in exhaust gas to prevent clogging or wear of subsequent equipment; The pretreated exhaust gas enters the inlet of the exhaust gas incinerator 300 through a pipeline from the outlet of the cyclone dust collector 200.
[0032] In some embodiments, the waste gas incinerator 300 adopts a direct combustion method (e.g., a TO waste gas incinerator) to heat the waste gas to above 750°C, so that the volatile organic compounds and other harmful substances in the waste gas are fully oxidized and decomposed, and converted into clean high-temperature flue gas. The high-temperature flue gas carries a large amount of heat energy and is discharged from the flue gas outlet of the waste gas incinerator 300, and enters the inlet of the high-temperature fan 400 through the pipeline. The high-temperature fan 400 provides power, pressurizes the high-temperature flue gas, and splits it into two paths through pipelines from its outlet: one path connects to the flue gas inlet of the waste heat boiler 500, and the other path connects to the flue gas inlet of the heat-using equipment 600. The heat-using equipment 600 can be a heat exchange device within the plant area, used to heat clean materials and realize the direct utilization of thermal energy.
[0033] In some embodiments, after the high-temperature flue gas releases heat in the waste heat boiler 500 and the heat-using equipment 600, it becomes low-temperature flue gas. The flue gas outlets of the waste heat boiler 500 and the heat-using equipment 600 are connected to the inlet of the bag filter 900 via pipelines. The 900 bag filter performs fine filtration on low-temperature flue gas to remove residual fine particles and ensure clean exhaust gas. The filtered flue gas enters the inlet of the main induced draft fan 1000 through the pipeline from the outlet of the bag filter 900. The main induced draft fan 1000 pressurizes the flue gas and then transports it from its outlet through the pipeline to the chimney 1100, and finally discharges it into the atmosphere.
[0034] In terms of energy recovery, the waste heat boiler 500 generates high-temperature steam through internal heat exchange components. Specifically, the waste heat boiler 500 includes a superheater 510, an evaporator 520, and an economizer 530; After entering the waste heat boiler 500 through the flue gas inlet, the high-temperature flue gas flows through the heat exchanger 510, evaporator 520 and economizer 530 in sequence, gradually releasing heat. The steam outlet of the waste heat boiler 500 is connected to the steam inlet of the steam turbine 700 via a pipeline. The high-temperature and high-pressure steam drives the steam turbine 700 to operate. The output shaft of the steam turbine 700 is directly connected to the generator 800, which converts mechanical energy into electrical energy. The electrical energy generated by the generator 800 can be used for power supply in the plant area, energy storage, or grid connection.
[0035] In some embodiments, the exhaust port of the steam turbine 700 is connected to the inlet of the condenser 1200 via a pipeline, in which the exhaust steam is cooled into condensate. Condensate is pressurized by condensate pump 1300 from the outlet of condenser 1200 and then transported to the inlet of regenerator 1400. The regenerative heating device 1400 uses the system's waste heat to preheat the condensate, thereby improving thermal efficiency. The preheated water is pressurized from the outlet of the regenerator 1400 by the feed water pump 1500 and finally delivered to the inlet of the economizer 530 of the waste heat boiler 500 to complete the water-steam cycle.
[0036] Inside the waste heat boiler 500, the water circulation process is as follows: The feedwater absorbs waste heat from the flue gas in the economizer 530. After the temperature rises to near saturation, it enters the steam drum (not shown in the figure). The steam drum is connected to the inlet of the evaporator 520 through a downcomer. The water further absorbs heat in the evaporator 520 and is partially converted into steam to form a steam-water mixture. The steam-water mixture returns to the steam drum. After steam-water separation, saturated steam enters the superheater 510 from the top of the steam drum. In the superheater 510, it absorbs heat and becomes superheated steam, which is finally delivered to the steam turbine 700.
[0037] This utility model has a reasonable structure and achieves the synergistic effect of waste gas treatment and energy recovery. The cyclone dust collector 200 and the bag dust collector 900 ensure the long-term reliable operation of the equipment and environmentally friendly emissions. The high-temperature flue gas diversion realizes the recovery and utilization of heat energy, and the waste heat power generation cycle improves the overall energy efficiency.
[0038] In summary, the waste gas incineration waste heat power generation system of this utility model is particularly suitable for treating large particulate matter, viscous substances, or low-concentration, high-volume waste gas, and has the advantages of energy saving, economy, and high efficiency.
[0039] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0040] The embodiments described above merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A waste incineration exhaust heat power generation system characterized by comprising: include: The production equipment (100) has its exhaust outlet connected to the inlet of a cyclone dust collector (200) via a pipeline, and the outlet of the cyclone dust collector (200) is connected to the inlet of an exhaust gas incinerator (300) via a pipeline. The flue gas outlet of the waste gas incinerator (300) is connected to the inlet of the high-temperature fan (400) through a pipeline. The outlet of the high-temperature fan (400) is divided into two paths through a pipeline. One path is connected to the flue gas inlet of the waste heat boiler (500), and the other path is connected to the flue gas inlet of the heat-using equipment (600). The flue gas outlet of the waste heat boiler (500) and the flue gas outlet of the heat-using equipment (600) are connected to the inlet of the bag filter (900) through pipelines. The outlet of the bag filter (900) is connected to the inlet of the main induced draft fan (1000) via a pipeline, and the outlet of the main induced draft fan (1000) is connected to the chimney (1100) via a pipeline. The steam outlet of the waste heat boiler (500) is connected to the steam inlet of the steam turbine (700) via a pipeline, and the output shaft of the steam turbine (700) is connected to the generator (800). The exhaust port of the steam turbine (700) is connected to the inlet of the condenser (1200) via a pipeline; The outlet of the condenser (1200) is connected to the inlet of the regenerator (1400) via a condensate pump (1300), and the outlet of the regenerator (1400) is connected to the inlet of the economizer (530) of the waste heat boiler (500) via a feed water pump (1500).
2. The waste incineration heat recovery power generation system according to claim 1, characterized by: The waste gas incinerator (300) is configured to heat the waste gas to above 750°C.
3. The waste incineration heat recovery power generation system according to claim 2, characterized by: The waste gas incinerator (300) is a TO waste gas incinerator.
4. The waste incineration heat recovery power generation system according to claim 1, characterized by: The waste heat boiler (500) includes a superheater (510), an evaporator (520) and an economizer (530), and the flue gas inlet of the waste heat boiler (500) is connected in sequence to the superheater (510), the evaporator (520) and the economizer (530).
5. The waste incineration heat recovery power generation system according to claim 4, characterized by: The outlet of the economizer (530) is connected to the steam drum, the steam drum is connected to the inlet of the evaporator (520) via a downcomer, the outlet of the evaporator (520) is connected to the steam drum, and the steam outlet of the steam drum is connected to the inlet of the superheater (510).
6. The waste gas incineration waste heat power generation system according to claim 1, characterized in that: The outlet of the high-temperature fan (400) is connected to the waste heat boiler (500) and the heat-using equipment (600) respectively through branch pipes or tee joints.
7. The waste gas incineration waste heat power generation system according to claim 1, characterized in that: The power output terminal of the generator (800) is connected to the plant's electrical equipment, energy storage device, or power grid.
8. The waste gas incineration waste heat power generation system according to claim 1, characterized in that: The heat-using equipment (600) is a heat exchange device used for heating clean materials.
9. The waste gas incineration waste heat power generation system according to claim 1, characterized in that: It also includes a regenerator (1400), which is disposed between the condensate pump (1300) and the feed water pump (1500) for heating condensate.