Flue gas waste heat recovery power generation boiler with double flue gas channels

Abstract

The utility model discloses a flue gas waste heat recovery power generation boiler with double flue gas channels. The flue gas waste heat recovery power generation boiler comprises a coal gas side system, a waste heat side system and a boiler barrel. The gas side system comprises a gas burner, a boiler furnace, a superheater device, a boiler evaporator, a boiler flue, a boiler economizer and a boiler condensate water heater; the waste heat side system comprises an external flue gas inlet, a waste heat furnace flue, a waste heat furnace evaporator, a waste heat furnace economizer and a waste heat furnace condensate water heater. Second saturated steam generated by the waste heat side system and first saturated steam generated by the boiler are subjected to steam-water separation through the steam-water separation device in the boiler barrel to form total saturated steam, the total saturated steam enters the superheater device, and the superheater device heats the total saturated steam to rated steam parameters required by the boiler. Therefore, waste heat flue gas of the power plant can be fully utilized, waste is turned into wealth, waste heat resources are fully utilized, and economic benefits of the power plant are improved.

Description

Technical Field

[0001] The present application belongs to the technical field of boilers, and in particular relates to a double flue gas channel flue gas waste heat recovery power generation boiler. Background Art

[0002] In the current widespread practice of industrial production, flue gas waste heat recovery power generation boilers are a type of energy-saving and environmentally friendly equipment with great potential. Their core value lies in the deep excavation and transformation of the rich waste heat resources contained in the flue gas emitted in the industrial production process. If these waste heat resources can be effectively captured and converted into electrical energy or thermal energy, they can not only significantly improve the comprehensive utilization efficiency of energy, but also greatly reduce thermal pollution to the environment and promote the realization of green production goals.

[0003] However, it is worth noting that despite the significant environmental protection and energy-saving advantages of flue gas waste heat recovery power generation boilers, existing technologies still face many challenges in practical applications, especially in the effective utilization of waste heat flue gas emitted by large industrial facilities such as power plants. Most technical solutions on the market currently have problems such as low efficiency and large energy losses when capturing and converting these high-temperature, high-velocity flue gas waste heat, resulting in the actual utilization rate of waste heat resources being lower than theoretical expectations. This not only limits the further promotion and application of flue gas waste heat recovery technology, but also fails to fully tap its huge potential in energy conservation and emission reduction.

[0004] Therefore, the development of a new flue gas waste heat recovery power generation boiler that can efficiently and stably recover and convert waste heat flue gas from power plants has become a key issue that needs to be urgently addressed in the current field of environmental protection and energy technology. Utility Model Content

[0005] The present application provides a dual flue gas channel flue gas waste heat recovery power generation boiler, which can fully utilize the waste heat flue gas of the power plant and turn waste into treasure to solve the above-mentioned technical problems.

[0006] In order to achieve the above application purpose, the technical solution adopted in this application is as follows:

[0007] The embodiment of the present application provides a double flue gas channel flue gas waste heat recovery power generation boiler, comprising: a gas side system, a waste heat side system, and a boiler drum;

[0008] The gas side system includes: a gas burner, a boiler furnace, a superheater device, a boiler evaporator, a boiler flue, a boiler economizer, and a boiler condensate heater, and the gas side system is used to generate first saturated steam;

[0009] The waste heat side system includes: an external flue gas inlet, a waste heat furnace flue, a waste heat furnace evaporator, a waste heat furnace economizer, and a waste heat furnace condensate heater. The waste heat side system is used to generate second saturated steam;

[0010] The first saturated steam and the second saturated steam are used to be input into the boiler drum at the same time, and the steam-water separation device in the boiler drum is used to separate the first saturated steam and the second saturated steam, and output the total saturated steam after separation;

[0011] The total saturated steam is used to pass through the superheater device, and the superheater device is used to heat the total saturated steam to the rated steam parameters required by the boiler.

[0012] Optionally, the superheater device includes a high-temperature superheater and a low-temperature superheater, and the total saturated steam is used to pass through the low-temperature superheater and the high-temperature superheater in sequence, and the low-temperature superheater and the high-temperature superheater are used to heat the total saturated steam to the rated steam parameters required by the boiler.

[0013] Optionally, the boiler evaporator, the boiler economizer and the boiler condensate heater are sequentially arranged in the boiler flue.

[0014] Optionally, the waste heat furnace evaporator, the waste heat furnace economizer and the waste heat furnace condensate heater are sequentially arranged in the waste heat furnace flue.

[0015] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0016] The embodiment of the present application provides a double flue gas channel flue gas waste heat recovery power generation boiler, the high temperature flue gas of the gas burner passes through the superheater device, boiler evaporator, boiler economizer, boiler condensate heater in sequence, the high temperature flue gas on the waste heat side passes through the waste heat furnace evaporator, waste heat furnace economizer, waste heat furnace condensate heater in sequence, the second saturated steam generated by the waste heat side system and the first saturated steam generated by the boiler itself are separated by steam and water through the steam-water separation device in the drum, and the total saturated steam enters the superheater device, and the superheater device heats the total saturated steam to the rated steam parameters required by the boiler. In this way, the waste heat flue gas of the power plant can be fully utilized, waste can be turned into treasure, waste heat resources can be fully utilized, and the economic benefits of the power plant can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic structural diagram of a flue gas waste heat recovery power generation boiler with dual flue gas channels provided in an embodiment of the present application is shown.

[0019] Illustration Description:

[0020] 1. Gas burner; 2. Boiler furnace; 3. High-temperature superheater; 4. Low-temperature superheater; 5. Boiler evaporator; 6. Boiler flue; 7. Boiler economizer; 8. Boiler condensate heater; 9. External flue gas inlet; 10. Waste heat furnace flue; 11. Waste heat furnace evaporator; 12. Waste heat furnace economizer; 13. Waste heat furnace condensate heater; 14. Boiler drum. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In order to illustrate the technical solution described in this application, a specific embodiment is provided below for illustration.

[0025] See also Figure 1 As shown, the embodiment of the present application provides a double flue gas channel flue gas waste heat recovery power generation boiler, including: a gas side system, a waste heat side system, and a drum 14. The gas side system includes: a gas burner 1, a boiler furnace 2, a superheater device, a boiler evaporator 5, a boiler flue 6, a boiler economizer 7, and a boiler condensate heater 8. The gas side system is used to generate a first saturated steam Q1. The waste heat side system includes: an external flue gas inlet 9, a waste heat furnace flue 10, a waste heat furnace evaporator 11, a waste heat furnace economizer 12, and a waste heat furnace condensate heater 13. The waste heat side system is used to generate a second saturated steam Q2.

[0026] The first saturated steam Q1 and the second saturated steam Q2 are used to be input into the boiler drum 14 at the same time. The steam-water separation device in the boiler drum 14 is used to separate the first saturated steam Q1 and the second saturated steam Q2, and output the total saturated steam Q3 after separation.

[0027] The total saturated steam Q3 is used to pass through the superheater device, and the superheater device is used to heat the total saturated steam Q3 to the rated steam parameters required by the boiler. For example, the superheater device includes a high-temperature superheater 3 and a low-temperature superheater 4, and the total saturated steam Q3 is used to pass through the low-temperature superheater 4 and the high-temperature superheater 3 in sequence, and the low-temperature superheater 4 and the high-temperature superheater 3 are used to heat the total saturated steam Q3 to the rated steam parameters required by the boiler. For example, the rated steam parameters include temperature and pressure parameters.

[0028] It should be noted that, in the field of boiler technology, the above-mentioned "high temperature" and "low temperature" are relative to the temperature of steam.

[0029] In the above-mentioned double flue gas channel flue gas waste heat recovery power generation boiler, the boiler heating surface is divided into two parts: the gas side and the waste heat side. The gas side and the waste heat side share the boiler drum 14, and the superheater devices are all arranged on the gas side. Independent flue gas channels are arranged on the gas side and the waste heat side, and the total saturated steam Q3 generated can reach the rated steam parameters required by the boiler through the temperature adjustment function of the superheater device. In this way, the waste heat flue gas of the power plant can be fully utilized, waste can be turned into treasure, and waste heat resources can be fully utilized to ensure efficient recovery of waste heat and generate more electricity.

[0030] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A double flue gas channel flue gas waste heat recovery power generation boiler, characterized in that: include: Gas side system, waste heat side system, and boiler drum; The coal gas side system comprises: a coal gas burner, a boiler furnace, a superheater device, a boiler evaporator, a boiler flue, a boiler economizer, and a boiler condensate heater, and the coal gas side system is used to generate first saturated steam; The waste heat side system comprises: an external flue gas inlet, a waste heat furnace flue, a waste heat furnace evaporator, a waste heat furnace economizer, and a waste heat furnace condensate heater, and the waste heat side system is used to generate second saturated steam; The first saturated steam and the second saturated steam are used to be input into the boiler drum at the same time, and the steam-water separation device in the boiler drum is used to separate the first saturated steam and the second saturated steam into steam and water, and output the total saturated steam after separation; The total saturated steam is used to pass through the superheater device, and the superheater device is used to heat the total saturated steam to the rated steam parameters required by the boiler.

2. The double flue gas channel flue gas waste heat recovery power generation boiler according to claim 1, characterized in that: The superheater device includes a high-temperature superheater and a low-temperature superheater. The total saturated steam is used to pass through the low-temperature superheater and the high-temperature superheater in sequence. The low-temperature superheater and the high-temperature superheater are used to heat the total saturated steam to the rated steam parameters required by the boiler.

3. The double flue gas channel flue gas waste heat recovery power generation boiler according to claim 1, characterized in that: The boiler evaporator, the boiler economizer and the boiler condensate heater are sequentially arranged in the boiler flue.

4. The double flue gas channel flue gas waste heat recovery power generation boiler according to claim 1, characterized in that: The waste heat furnace evaporator, the waste heat furnace economizer and the waste heat furnace condensate heater are sequentially arranged in the waste heat furnace flue.

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