A post-combustion flue gas molten salt heat exchange denitration integrated device and working mechanism thereof

Abstract

A kind of afterburning type flue gas molten salt heat exchange denitration integrated device and its working mechanism, characterized by: in the upstream of flue gas molten salt heat exchanger, increase afterburning device, afterburning device is connected with flue gas molten salt heat exchanger by flue, constitutes afterburning type flue gas molten salt heat exchange denitration integrated device;Including afterburner system or afterburning device, first-stage flue gas molten salt heat exchange component, flue gas denitration component and third-stage flue gas molten salt heat exchange component.The present application can realize the function of more uniform and more efficient afterburning heat transfer in flue gas;Realize the safer ignition mode of afterburning gas or atomized afterburning gas-liquid (or gas powder) mixture outside the flue;And realize the function of more convenient monitoring of afterburning combustion;Realize the purification function of removing nitrogen oxides in flue gas;Realize the complete decoupling of heat and electricity in gas turbine power generation heat storage system, realize the function of independent external power supply, heat storage or heat supply of system.

Description

Technical Field

[0001] This invention belongs to the technical field of molten salt equipment, specifically a combustion-type flue gas molten salt heat exchange and denitrification integrated device and its working mechanism. Background Technology

[0002] After some coal-fired power units were shut down, their functions were partially replaced by gas-fired heating boilers and partially by gas-fired power generation and heating systems. Optimization and modification of the basic functions of these gas-fired boilers have led to relatively mature technological solutions such as gas turbine-plus-waste-heat boiler power generation and heating systems, and gas turbine-plus-thermal-storage power generation and heating systems.

[0003] Patent CN 213021144 U discloses a molten salt flue gas heat exchanger, including a shell, a lower end cap, an upper end cap, heat exchange tubes, a lower tube sheet, and an upper tube sheet. While this patented technology can address the problem of intermittent high-temperature flue gas and molten salt heat exchange, it fails to achieve the functions of supplementary combustion and flue gas purification. Patent CN 206973508 U discloses a gas turbine waste heat molten salt thermal storage system, including a molten salt waste heat boiler, a low-temperature molten salt tank, a high-temperature molten salt tank, and a steam generation unit. Although this patented technology uses a molten salt waste heat boiler to recover heat from the high-temperature flue gas discharged from the gas turbine, it also fails to achieve the functions of supplementary combustion and flue gas purification. While this technology possesses heat storage and energy storage capabilities, its thermoelectricity is coupled, meaning the total amount of heat and the total amount of power generation are mutually limited. This means the stored heat cannot exceed the waste heat of the gas turbine flue gas, and it cannot achieve independent external heating or power supply.

[0004] This invention addresses the technical problems existing in the above-mentioned technical solutions. The technical solution implemented not only enables the reuse of waste heat from flue gas after gas turbine power generation, but also achieves complete decoupling of thermoelectricity in the gas turbine power generation, heating, and energy storage system, realizing flue gas purification and autonomous external power supply, heat storage, or heating. Summary of the Invention

[0005] The purpose of this invention patent is to realize the reuse of waste heat from flue gas after gas turbine power generation and the complete decoupling of thermoelectricity in the gas turbine power generation, heating and energy storage system, so as to realize the system's flue gas denitrification and the functions of autonomous power supply, heat storage or heating.

[0006] The technical solution of the present invention is as follows: A combustion-type flue gas molten salt heat exchanger denitrification integrated device is characterized by: adding a combustion device upstream of the flue gas molten salt heat exchanger, the combustion device being connected to the flue gas molten salt heat exchanger through a flue to form a combustion-type flue gas molten salt heat exchanger integrated device.

[0007] Furthermore, a flue gas molten salt heat exchange and denitrification integrated device for afterburning is characterized by: including at least one afterburning device (72-2), wherein the afterburning device (72-2) includes at least one first afterburning nozzle (72-2-1-1), a first afterburning branch circuit (72-2-1-2), a first afterburning mixing pipe (72-2-1-3), a first afterburning ignition chamber (72-2-1-4), a first afterburning ignition observation window (72-2-1-5), a first afterburning air pipe (72-2-1-6), a first afterburning air electric valve (72-2-1-7), a first afterburning electric igniter (72-2-1-8), a first afterburning gas pipe (72-2-1-9), a first afterburning gas electric valve (72-2-1-10), and at least one m-th afterburning nozzle. The combustion device (72-2) comprises the following components: nozzle (72-2-m-1), m-th supplementary combustion branch circuit (72-2-m-2), m-th supplementary combustion mixing pipe (72-2-m-3), m-th supplementary combustion ignition chamber (72-2-m-4), m-th supplementary combustion ignition observation window (72-2-m-5), m-th supplementary combustion air pipe (72-2-m-6), m-th supplementary combustion air electric valve (72-2-m-7), m-th supplementary combustion electric igniter (72-2-m-8), m-th supplementary combustion gas pipe (72-2-m-9), and m-th supplementary combustion gas electric valve (72-2-m-10). The combustion device (72-2) consists of m supplementary combustion branch circuits, supplementary combustion mixing pipes, supplementary combustion ignition chambers, supplementary combustion air pipes, supplementary combustion air electric valves, supplementary combustion electric igniters, supplementary combustion gas pipes, and supplementary combustion gas electric valves; where m is a natural number. The axis of the first supplementary combustion branch circuit (72-2-1-2) coincides with the first equal pressure line of flue gas (72-1-1), and the first supplementary combustion branch circuit (72-2-1-2) is a connected circuit; The axis of the first afterburning nozzle (72-2-1-1) is along the flue gas flow direction and perpendicular to the axis of the first afterburning branch circuit (72-2-1-2). The first afterburning nozzle (72-2-1-1) is connected to the first afterburning branch circuit (72-2-1-2). Multiple first afterburning nozzles (72-2-1-1) are evenly arranged along the axis of the first afterburning branch circuit (72-2-1-2). The axis of the first afterburning mixing pipe (72-2-1-3) is connected to the axis of the first afterburning branch pipe circuit (72-2-1-2), and the first afterburning mixing pipe (72-2-1-3) and the first afterburning branch pipe circuit (72-2-1-2) are connected in a continuous manner; The symmetry line of the first afterburning ignition chamber (72-2-1-4) is connected in the same direction as the axis of the first afterburning mixing pipe (72-2-1-3), and the first afterburning ignition chamber (72-2-1-4) and the first afterburning mixing pipe (72-2-1-3) are connected in a through manner; The first afterburning observation window (72-2-1-5) is set on at least one side of the first afterburning chamber (72-2-1-4), and the way and number of the window are set are to facilitate observation of the ignition situation in the first afterburning chamber (72-2-1-4). The axis of the first afterburning air pipe (72-2-1-6) is obliquely connected to the symmetrical line of the first afterburning ignition chamber (72-2-1-4), and the first afterburning air pipe (72-2-1-6) and the first afterburning ignition chamber (72-2-1-4) are obliquely connected; a first afterburning air electric valve (72-2-1-7) is provided on the first afterburning air pipe (72-2-1-6) to control the air flow. The axis of the first supplementary combustion gas pipe (72-2-1-9) is connected in the same direction as the symmetrical line of the first supplementary combustion ignition chamber (72-2-1-4). The first supplementary combustion gas pipe (72-2-1-9) is inserted into the first supplementary combustion ignition chamber (72-2-1-4) for a certain length and then connected to it. The first supplementary combustion gas pipe (72-2-1-9) is equipped with a first supplementary combustion gas electric valve (72-2-1-10) to control the gas flow rate. The first supplementary combustion electric igniter (72-2-1-8) is connected at one end to the wall of the first supplementary combustion gas pipe (72-2-1-9) via a wire, and at the other end is equipped with at least one ignition probe. One end of the ignition probe is connected to the first supplementary combustion electric igniter (72-2-1-8) via a wire, and the other end is not in contact with the opening of the first supplementary combustion gas pipe (72-2-1-9) after it has been inserted into the first supplementary combustion ignition chamber (72-2-1-4) for a certain length. The distance is suitable for generating an electric spark after being energized. The first supplementary combustion electric igniter (72-2-1-8) is equipped with a low-voltage power supply. The axis of the m-th supplementary combustion branch circuit (72-2-m-2) coincides with the m-th isobaric line of the flue gas (72-1-m), and the m-th supplementary combustion branch circuit (72-2-m-2) is a connected circuit; The axis of the m-th afterburning nozzle (72-2-m-1) is along the flue gas flow direction and perpendicular to the axis of the m-th afterburning branch circuit (72-2-m-2). The m-th afterburning nozzle (72-2-m-1) is connected to the m-th afterburning branch circuit (72-2-m-2). Multiple m-th afterburning nozzles (72-2-m-1) are evenly arranged along the axis of the m-th afterburning branch circuit (72-2-m-2). The axis of the m-th supplementary combustion mixing pipe (72-2-m-3) is connected to the axis of the m-th supplementary combustion branch pipe circuit (72-2-m-2), and the m-th supplementary combustion mixing pipe (72-2-m-3) and the m-th supplementary combustion branch pipe circuit (72-2-m-2) are connected in a continuous manner; The symmetry line of the m-th afterburning ignition chamber (72-2-m-4) is connected in the same direction as the axis of the m-th afterburning mixing pipe (72-2-m-3), and the m-th afterburning ignition chamber (72-2-m-4) and the m-th afterburning mixing pipe (72-2-m-3) are connected in a through manner; The m-th afterburning ignition observation window (72-2-m-5) is set on at least one side of the m-th afterburning ignition chamber (72-2-m-4), and the way and number of them are set are based on the need to observe the ignition situation in the m-th afterburning ignition chamber (72-2-m-4); The axis of the m-th supplementary combustion air pipe (72-2-m-6) intersects the symmetry line of the m-th supplementary combustion ignition chamber (72-2-m-4) and is obliquely connected; the m-th supplementary combustion air pipe (72-2-m-6) and the m-th supplementary combustion ignition chamber (72-2-m-4) are obliquely connected; the m-th supplementary combustion air pipe (72-2-m-6) is equipped with an m-th supplementary combustion air electric valve (72-2-m-7) to control the air flow. The axis of the m-th supplementary combustion gas pipe (72-2-m-9) is connected in the same direction as the symmetry line of the m-th supplementary combustion ignition chamber (72-2-m-4). The m-th supplementary combustion gas pipe (72-2-m-9) is inserted into the m-th supplementary combustion ignition chamber (72-2-m-4) for a certain length and then connected to it. The m-th supplementary combustion gas pipe (72-2-m-9) is equipped with an m-th supplementary combustion gas electric valve (72-2-m-10) to control the gas flow rate. The m-th supplementary combustion electric igniter (72-2-m-8) is connected at one end to the wall of the m-th supplementary combustion gas pipe (72-2-m-9) via a wire, and at the other end is equipped with at least one ignition probe. One end of the ignition probe is connected to the m-th supplementary combustion electric igniter (72-2-m-8) via a wire, and the other end is not in contact with the opening of the m-th supplementary combustion gas pipe (72-2-m-9) after it has been inserted into the m-th supplementary combustion ignition chamber (72-2-m-4) for a certain length. The distance is suitable for generating an electric spark after being energized. The m-th supplementary combustion electric igniter (72-2-m-8) is equipped with a low-voltage power supply.

[0008] further, An integrated device for flue gas molten salt heat exchange and denitrification with a combustion-type combustion system, characterized in that: it includes a combustion-type combustion system (72), wherein the combustion-type combustion system (72) includes at least one combustion-type combustion device (72-2), at least one combustion-type combustion video monitor (72-7), at least one combustion observation window for the combustion nozzle (72-3), at least one combustion observation video monitor for the combustion nozzle (72-6), a flue gas temperature and pressure measuring instrument before combustion (72-4), and a flue gas temperature and pressure measuring instrument after combustion (72-5); Along the direction of the flue gas, at least one hole is opened on the flue wall downstream of the combustion device (72-2), and a combustion observation window (72-3) for the combustion of the combustion nozzle is embedded in each hole; the combustion observation video monitor (72-6) for the combustion of the combustion nozzle is arranged at a certain position outside the flue, and its position and number are determined so as to be able to observe the combustion of all combustion nozzles. An instrument for measuring the temperature and pressure of flue gas before combustion (72-4) is arranged upstream of the combustion device (72-2), with its probe inserted into the flue through the flue wall in the radial direction of the flue. A flue gas temperature and pressure measuring instrument (72-5) is arranged downstream of the afterburning device (72-2). Its probe passes through the flue wall and is inserted into the flue along the radial direction of the flue. It can be arranged upstream or downstream of the combustion observation window (72-3) of the afterburning nozzle. When it is arranged upstream of the combustion observation window (72-3), it should not affect the observation of the combustion of the afterburning nozzle. The aforementioned afterburning ignition video monitor (72-7) is arranged at a certain position outside the flue. The position and number of the monitor are determined so that the ignition situation inside the afterburning ignition chamber of all afterburning devices can be observed. The combustion nozzle, combustion branch circuit and part of the combustion mixing pipe in the combustion device (72-2) are arranged inside the flue and connected to the inner wall of the flue through a support structure; the combustion mixing pipe in the combustion device passes through the flue wall in the radial direction of the flue.

[0009] Furthermore, a combustion-type flue gas molten salt heat exchange and denitrification integrated device is characterized by comprising a combustion system (72), a primary flue gas molten salt heat exchange component (73-1), a flue gas denitrification component (74), and a tertiary flue gas molten salt heat exchange component (73-3). The burner system (72) is connected to the primary flue gas molten salt heat exchange assembly (73-1) via a flue gas pipeline (60); the primary flue gas molten salt heat exchange assembly (73-1) is connected to the flue gas denitrification assembly (74) via a flue gas pipeline (60); the flue gas denitrification assembly (74) is connected to the tertiary flue gas molten salt heat exchange assembly (73-3) via a flue gas pipeline (60). The molten salt inlet of the tertiary flue gas molten salt heat exchanger (73-3) is connected to the molten salt outlet of the low-temperature molten salt storage tank (70-2) via a molten salt pipeline (70-0); the molten salt outlet of the tertiary flue gas molten salt heat exchanger (73-3) is connected to the molten salt inlet of the primary flue gas molten salt heat exchanger (73-1) via a molten salt pipeline (70-0); and the molten salt outlet of the primary flue gas molten salt heat exchanger (73-1) is connected to the molten salt inlet of the high-temperature molten salt storage tank (70-1) via a molten salt pipeline (70-0).

[0010] Furthermore, a combustion-type flue gas molten salt heat exchange and denitrification integrated device is characterized in that: the flue gas first isobaric line (72-1-1) to the flue gas m-th isobaric line (72-1-m) are evenly distributed at the flue gas cross section; the flue gas pressure is the same on the same isobaric line; the positions of the flue gas first isobaric line (72-1-1) to the flue gas m-th isobaric line (72-1-m) are obtained by numerical simulation calculation.

[0011] Furthermore, a combustion-type flue gas molten salt heat exchange and denitrification integrated device is characterized in that: the inner contour line (72-1-0) of the flue section can be circular, square or multi-segment closed broken line.

[0012] Furthermore, a flue gas molten salt heat exchange and denitrification integrated device for supplementary combustion is characterized in that: the gas inside the m-th supplementary combustion gas pipe (72-2-m-9) is a combustible gas, an atomized combustible gas-liquid mixture, an atomized combustible gas-powder mixture, or an atomized combustible gas-liquid-powder mixture.

[0013] Furthermore, a flue gas molten salt heat exchange and denitrification integrated device for supplementary combustion is characterized in that: the internal cross-sectional contour lines of all supplementary combustion nozzles in the supplementary combustion device (72-2) are hyperbolic.

[0014] Furthermore, a method for operating an integrated flue gas molten salt heat exchange and denitrification device with a combustion-type combustion system is characterized in that: the normal operating process of the combustion-type combustion system (72) is as follows: The flue gas first passes through the pre-combustion flue gas temperature and pressure measuring instrument (72-4) upstream of the combustion device (72-2) to measure the pre-combustion flue gas temperature and pressure values. The pre-combustion flue gas temperature and pressure values ​​are then transmitted to the combustion intelligent control system via a transmitter for backup. When the flue gas passes through the combustion device (72-2), it is heated by the combustion device (72-2) and continues to flow downstream; the combustion observation video monitor (72-6) of the combustion nozzle records the combustion status of all nozzles in the combustion device (72-2) through the combustion observation window (72-3), and the video signal is transmitted to the combustion intelligent control system through the video signal line. The result is analyzed and processed by AI technology and stored for later use. After the flue gas is re-burned by the re-burning device (72-2), the flue gas temperature and pressure are measured by the flue gas temperature and pressure measuring instrument (72-5). The flue gas temperature and pressure values ​​are then transmitted to the re-burning intelligent control system via a transmitter for backup. The numerical values of the flue gas temperature and pressure before supplementary combustion, the numerical values of the flue gas temperature and pressure after supplementary combustion, which are reserved for the incoming supplementary combustion intelligent control system, the results of the combustion conditions of all nozzles in the supplementary combustion device (72-2) recorded by the supplementary combustion nozzle combustion observation video monitor (72-6) stored in the supplementary combustion intelligent control system after being analyzed and processed by AI technology, the results of the ignition conditions of all supplementary combustion ignition chambers in the supplementary combustion device (72-2) recorded by the supplementary combustion ignition video monitor record (72-7) stored in the supplementary combustion intelligent control system after being analyzed and processed by AI technology, the first supplementary combustion air electric valve (72-2-1-7), the first supplementary combustion electric igniter (72-2-1-8), the first supplementary combustion gas electric valve (72-2-1-10), the mth supplementary combustion air electric valve (72-2-m-7), the mth supplementary combustion electric igniter (72-2-m-8) and the mth supplementary combustion gas electric valve (72-2-m-10) form a relationship chain, and the control logic is executed by the algorithm in the supplementary combustion intelligent control system.

[0015] Furthermore, a working method of a supplementary combustion type flue gas molten salt heat exchange and denitrification integrated device is characterized in that when the flue gas needs supplementary combustion, the process of the supplementary combustion device (72-2) from ignition to normal operation is as follows: When the flue gas needs supplementary combustion, the algorithm in the supplementary combustion intelligent control system issues an instruction to open the first supplementary combustion air electric valve (72-2-1-7) and / or the mth supplementary combustion air electric valve (72-2-m-7), and after 1 to 2 seconds; The algorithm in the supplementary combustion intelligent control system issues an instruction to simultaneously open the first supplementary combustion electric igniter (72-2-1-8) and the first supplementary combustion gas electric valve (72-2-1-10), and / or the mth supplementary combustion electric igniter (72-2-m-8) and the mth supplementary combustion gas electric valve (72-2-m-10); At this time, it can be observed in the first supplementary combustion ignition observation window (72-2-1-5) and / or the mth supplementary combustion ignition observation window (72-2-m-5) that the mixed gas in the first supplementary combustion ignition chamber (72-2-1-4) and / or the mth supplementary combustion ignition chamber (72-2-m-4) has been ignited. After this ignition video information is recorded by the supplementary combustion ignition video monitor (72-7), it is transmitted to the supplementary combustion intelligent control system for storage. The result of the video information of the ignition conditions of all supplementary combustion ignition chambers in the supplementary combustion device (72-2) after being analyzed and processed by AI technology is used as a representative ignition numerical value. After receiving this numerical value, the algorithm in the supplementary combustion intelligent control system issues an instruction to close the first supplementary combustion electric igniter (72-2-1-8) and / or the mth supplementary combustion electric igniter (72-2-m-8); Meanwhile, the algorithm in the supplementary combustion intelligent control system issues an instruction to increase the opening degrees of the first supplementary combustion air electric valve (72-2-1-7) and the first supplementary combustion gas electric valve (72-2-1-10), and / or the mth supplementary combustion air electric valve (72-2-m-7) and the mth supplementary combustion gas electric valve (72-2-m-10), that is, an instruction to increase the flow rate; At this time, the flow rate of the mixed gas entering the first supplementary combustion ignition chamber (72-2-1-4) and / or the mth supplementary combustion ignition chamber (72-2-m-4) gradually increases. The algorithm controls the flow rate ratio of air to gas in the mixed gas, so that the flame flows forward along with the flow of the mixed gas; the flame sequentially passes through the first supplementary combustion mixing pipe (72-2-1-3), the first supplementary combustion branch pipe loop (72-2-1-2) and enters and sprays out from all the first supplementary combustion nozzles (72-2-1-1), and / or sequentially passes through the mth supplementary combustion mixing pipe (72-2-m-3), the mth supplementary combustion branch pipe loop (72-2-m-2) and enters and sprays out from all the mth supplementary combustion nozzles (72-2-m-1); At this time, the combustion conditions of the mixed gas of all the supplementary combustion nozzles in the supplementary combustion device (72-2) can be observed through the combustion observation window (72-3) of the supplementary combustion nozzles. The video information of this combustion condition is recorded by the supplementary combustion nozzle combustion observation video monitor (72-6) and then transmitted to the supplementary combustion intelligent control system for storage. The result of the video information of the combustion conditions of the mixed gas of all the supplementary combustion nozzles in the supplementary combustion device (72-2) after being analyzed and processed by AI technology is a value representing being ignited. After receiving this value, the algorithm in the supplementary combustion intelligent control system issues an instruction to maintain the current opening degrees of the first supplementary combustion air electric valve (72-2-1-7) and the first supplementary combustion gas electric valve (72-2-1-10), and / or the mth supplementary combustion air electric valve (72-2-m-7) and the mth supplementary combustion gas electric valve (72-2-m-10); subsequently, the supplementary combustion system is in a normal operation state; The results of the numerical values of the flue gas temperature and pressure before supplementary combustion and the numerical values of the flue gas temperature and pressure after supplementary combustion transmitted to the backup of the supplementary combustion intelligent control system and analyzed and processed by AI technology are used as a reference for judging whether the supplementary combustion system is operating normally.

[0016] Furthermore, a working method of a supplementary combustion type flue gas molten salt heat exchange and denitration integrated device is characterized in that: The working principle for the supplementary combustion device (72-2) to achieve the function of more uniform and efficient supplementary combustion and heat transfer inside the flue gas is: Because, firstly, the pressure of the flue gas on the same isobaric line is the same; secondly, the axis of the first afterburning branch pipe loop (72-2-1-2) coincides with the first isobaric line of the flue gas (72-1-1), and the first afterburning branch pipe loop (72-2-1-2) is a connected loop; the axis of the first afterburning nozzle (72-2-1-1) is along the flue gas flow direction and perpendicular to the axis of the first afterburning branch pipe loop (72-2-1-2), and the first afterburning nozzle (72-2-1-1) is connected to the first afterburning branch pipe loop (72-2-1-2) in a through manner, and / or the axis of the mth afterburning branch pipe loop (72-2-m-2) coincides with the mth isobaric line of the flue gas (72-1-m), and the mth afterburning branch pipe loop (72-2-m-2) is a connected loop; the axis of the mth afterburning nozzle (72-2-m-1) is along the flue gas flow direction and perpendicular to the axis of the mth afterburning branch pipe loop (72-2-m-2), and the mth afterburning nozzle (72-2-m-1) is connected to the mth afterburning branch pipe loop (72-2-m-2) in a through manner; therefore, the above layout can ensure that the pressure at each afterburning nozzle is the same, so as to ensure that the afterburning mixed gas can reach all afterburning nozzles evenly for combustion; Because, firstly, the first isobaric line of the flue gas (72-1-1) and the mth isobaric line of the flue gas (72-1-m) selected at the flue duct cross-section are evenly distributed at this cross-section; secondly, multiple first afterburning nozzles (72-2-1-1) are evenly arranged along the axis of the first afterburning branch pipe loop (72-2-1-2), and / or multiple mth afterburning nozzles (72-2-m-1) are evenly arranged along the axis of the mth afterburning branch pipe loop (72-2-m-2); therefore, the above layout can ensure that the heat distribution of afterburning on the flue duct cross-section is relatively uniform; The internal profile lines of all afterburning nozzles in the afterburning device (72-2) are hyperbolas. This structure can not only improve the combustion efficiency of the mixed gas, but also improve the heat transfer efficiency of the flue gas after combustion. From large to small at the lower part, it can increase the kinetic energy of the flue gas and improve the exhaust speed; from small to large at the upper part, it gradually diffuses into the original flue gas, which can reduce the exhaust resistance of the flue gas generated by afterburning.

[0017] Compared with the prior art, the present invention has the following advantages and outstanding technical effects: 1) Realize the function of more uniform and efficient afterburning heat transfer inside the flue gas; 2) Realize a safer ignition method for the afterburning gas or the atomized afterburning gas-liquid (or gas-powder) mixture outside the flue duct; and realize the function of more convenient monitoring of the afterburning combustion situation; 3) Realize the purification function of removing nitrogen oxides from the flue gas; 4) Realize the complete decoupling of heat and power in the gas turbine power generation, heat supply and energy storage system, and realize the function of the system's independent external power supply, heat storage or heat supply. Brief Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of a supplementary combustion type heat storage and heat supply thermoelectric decoupling system for gas and steam power generation; Figure 2 is a schematic structural diagram of a supplementary combustion type molten salt heat storage and heat supply system; Figure 3 is a schematic structural diagram of a supplementary combustion type flue gas purification molten salt heat exchange device; Figure 4 is a schematic structural diagram of a supplementary combustion system with internal flue gas combustion and external ignition; Figure 5 is a schematic structural diagram of a supplementary combustor; Figure 6 is a schematic structural diagram of a nozzle; In the figure: 10, gas turbine power generation system; 20, exhausted flue gas; 30, power transmission and distribution system; 40, external power grid; 50, cable; 60, flue gas pipeline; 70, molten salt heat storage system; 80, steam power generation system; 90, main steam pipeline; 100, return water pipeline; 110, waste heat exchanger; 120, heat pipeline; 130, external heating demand; 140, external industrial steam demand; 70-0, molten salt pipeline; 70-1, high-temperature molten salt storage tank; 70-2, low-temperature molten salt storage tank; 70-3, molten salt heating device; 70-4, molten salt industrial steam generation device; 70-5, molten salt high-temperature and high-pressure steam generation device; 71, supplementary combustion type flue gas molten salt heat exchange integrated device; 72, supplementary combustor system; 73-1, primary flue gas molten salt heat exchange component; 73-3, tertiary flue gas molten salt heat exchange component; 74, SCR flue gas denitrification component; 72-3, Combustion Supplementary Nozzle Combustion Observation Window; 72-4, Flue Gas Temperature and Pressure Measuring Instrument before Combustion Supplementary; 72-5, Flue Gas Temperature and Pressure Measuring Instrument after Combustion Supplementary; 72-6, Combustion Supplementary Nozzle Combustion Observation Video Monitor; 72-7, Combustion Supplementary Ignition Video Monitor; 72-2, Combustion Supplementary Device; 72-1-0, Inner Contour Line of Flue Duct Cross-Section; 72-1-1, First Equal-Pressure Line of Flue Gas; 72-1-m, m-th Equal-Pressure Line of Flue Gas; 72-2-1-1, First Combustion Supplementary Nozzle; 72-2-1-2, First Combustion Supplementary Branch Pipe Loop; 72-2-1-3, First Combustion Supplementary Mixing Pipe; 72-2-1-4, First Combustion Supplementary Ignition Chamber; 72-2-1-5, First Combustion Supplementary Ignition Observation Window; 72-2-1-6, First Combustion Supplementary Air Pipe; 72-2-1-7, First Combustion Supplementary Air Electric Valve; 72-2-1-8, First Combustion Supplementary Electric Igniter; 72-2-1-9, First Combustion Supplementary Gas Pipe; 72-2-1-10, First Combustion Supplementary Gas Electric Valve; 72-2-m-1, m-th Combustion Supplementary Nozzle; 72-2-m-2, m-th Combustion Supplementary Branch Pipe Loop; 72-2-m-3, m-th Combustion Supplementary Mixing Pipe; 72-2-m-4, m-th Combustion Supplementary Ignition Chamber; 72-2-m-5, m-th Combustion Supplementary Ignition Observation Window; 72-2-m-6, m-th Combustion Supplementary Air Pipe; 72-2-m-7, m-th Combustion Supplementary Air Electric Valve; 72-2-m-8, m-th Combustion Supplementary Electric Igniter; 72-2-m-9, m-th Combustion Supplementary Gas Pipe; 72-2-m-10, m-th Combustion Supplementary Gas Electric Valve; where m is a natural number. Detailed Implementation Manner

[0019] The present invention will be further described below in conjunction with the accompanying drawings and the detailed implementation manner: As Figure 1 shown in the structural schematic diagram of a gas and steam power generation combustion supplementary type thermal energy storage heat supply and thermal power decoupling system, A gas and steam power generation combustion supplementary type thermal energy storage heat supply and thermal power decoupling system includes a gas turbine power generation system (10), a power transmission and transformation system (30), a molten salt thermal energy storage system (70), and a steam power generation system (80); The said gas turbine power generation system (10) is connected to the molten salt thermal energy storage system (70); the molten salt thermal energy storage system (70) is connected to the waste heat exchanger (110) through a flue gas pipeline (60); the gas turbine power generation system (10) is connected to the power transmission and transformation system (30) through a cable (50); the molten salt thermal energy storage system (70) is connected to the steam power generation system (80) through a main steam pipeline (90) and a return water pipeline (100); the steam power generation system (80) is connected to the power transmission and transformation system (30) through a cable (50).

[0020] The said power transmission and transformation system (30) is connected to an external power grid (40) through a cable (50); The electricity generated by the gas turbine power generation system (10) enters the external power grid (40) through the cable (50) via the power transmission and transformation system (30); The flue gas discharged from the gas turbine power generation system (10) passes through the flue gas pipeline (60) and successively passes through the supplementary combustion type flue gas molten salt heat exchange integrated device (71) and the waste heat exchanger (110), and then becomes waste flue gas (20) and is discharged into the air; The electricity generated by the steam power generation system (80) enters the external power grid (40) through the cable (50) via the power transmission and transformation system (30); The external heating demand (130) is connected to the molten salt heating device (70-3) through the heat pipeline (120); The external industrial steam demand (140) is connected to the molten salt industrial steam generation device (70-4) through the heat pipeline (120).

[0021] As Figure 2 shown in the structural schematic diagram of a supplementary combustion type molten salt heat storage heating system, The molten salt heat storage system (70) includes a supplementary combustion type flue gas molten salt heat exchange integrated device (71), a high-temperature molten salt storage tank (70-1), a low-temperature molten salt storage tank (70-2), a molten salt heating device (70-3), a molten salt industrial steam generation device (70-4), and a molten salt high-temperature and high-pressure steam generation device (70-5); The molten salt outlet of the low-temperature molten salt storage tank (70-2) is connected to the molten salt inlet of the supplementary combustion type flue gas molten salt heat exchange integrated device (71) through the molten salt pipeline (70-0); The molten salt inlet of the low-temperature molten salt storage tank (70-2) is respectively connected to the molten salt outlets of the molten salt high-temperature and high-pressure steam generation device (70-5), the molten salt heating device (70-3), and the molten salt industrial steam generation device (70-4) through the molten salt pipeline (70-0); The molten salt inlet of the high-temperature molten salt storage tank (70-1) is respectively connected to the molten salt outlets of the supplementary combustion type flue gas molten salt heat exchange integrated device (71) through the molten salt pipeline (70-0); The molten salt outlet of the high-temperature molten salt storage tank (70-1) is respectively connected to the molten salt inlets of the molten salt high-temperature and high-pressure steam generation device (70-5), the molten salt heating device (70-3), and the molten salt industrial steam generation device (70-4) through the molten salt pipeline (70-0).

[0022] The low-temperature molten salt is pumped by the molten salt pump from the low-temperature molten salt storage tank (70-2), through the molten salt pipeline (70-0), to the combustion-supplemented flue gas molten salt heat exchange integrated device (71) for heat exchange with the flue gas and becomes high-temperature molten salt. The high-temperature molten salt is pumped by the molten salt pump from the combustion-supplemented flue gas molten salt heat exchange integrated device (71), through the molten salt pipeline (70-0), to the high-temperature molten salt storage tank (70-1). The high-temperature molten salt is pumped by the molten salt pump from the high-temperature molten salt storage tank (70-1), through the molten salt pipeline (70-0), to the molten salt high-temperature high-pressure steam generation device (70-5), the molten salt heating device (70-3), and the molten salt industrial steam generation device (70-4) respectively for heat exchange and then becomes low-temperature molten salt. The low-temperature molten salt is pumped by the molten salt pump through the molten salt pipeline (70-0) into the low-temperature molten salt storage tank (70-2).

[0023] As Figure 3 As shown in the structural schematic diagram of a combustion-supplemented flue gas purification molten salt heat exchange device, it includes a combustion-supplemented flue gas molten salt heat exchange and denitrification integrated device. The combustion-supplemented flue gas molten salt heat exchange and denitrification integrated device includes a combustor system (72) or a combustion device (72-2), a primary flue gas molten salt heat exchange component (73-1), a flue gas denitrification component (74), and a tertiary flue gas molten salt heat exchange component (73-3). The combustor system (72) is connected to the primary flue gas molten salt heat exchange component (73-1) through a flue gas pipeline (60); the primary flue gas molten salt heat exchange component (73-1) is connected to the flue gas denitrification component (74) through a flue gas pipeline (60); the flue gas denitrification component (74) is connected to the tertiary flue gas molten salt heat exchange component (73-3) through a flue gas pipeline (60); the molten salt inlet of the tertiary flue gas molten salt heat exchange component (73-3) is connected to the molten salt outlet of the low-temperature molten salt storage tank (70-2) through a molten salt pipeline (70-0); the molten salt outlet of the tertiary flue gas molten salt heat exchange component (73-3) is connected to the molten salt inlet of the primary flue gas molten salt heat exchange component (73-1) through a molten salt pipeline (70-0); the molten salt outlet of the primary flue gas molten salt heat exchange component (73-1) is connected to the molten salt inlet of the high-temperature molten salt storage tank (70-1) through a molten salt pipeline (70-0).

[0024] To achieve the waste heat storage process: After the gas turbine power generation system (10) generates electricity, the flue gas enters the combustion-supplemented flue gas molten salt heat exchange integrated device (71), where the flue gas exchanges heat with the low-temperature molten salt, and the waste heat in the flue gas heats the low-temperature molten salt into high-temperature molten salt. The high-temperature molten salt enters the high-temperature molten salt storage tank (70-1) through the molten salt pipeline (70-0) under the action of the molten salt pump; the flue gas that has exchanged heat with the molten salt further exchanges heat with the waste heat exchanger (110) and then becomes exhausted flue gas (20) and is discharged into the air. Implement the exothermic power generation process: High-temperature molten salt enters the high-temperature and high-pressure steam generation device (70-5) for molten salt through the molten salt pipeline (70-0) under the action of the molten salt pump. In this device, the high-temperature molten salt exchanges heat with water to convert water into high-temperature and high-pressure steam. The high-temperature and high-pressure steam enters the steam power generation system (80) through the main steam pipeline (90) for power generation. The generated electricity enters the external power grid (40) through the cable (50) via the power transmission and transformation system (30); the high-temperature and high-pressure steam after power generation becomes low-pressure steam and / or condensed water and returns to the molten salt heat storage system (70) through the return water pipeline (100); the high-temperature molten salt becomes low-temperature molten salt after heat exchange, and it enters the low-temperature molten salt storage tank (70-2) through the molten salt pipeline (70-0) under the action of the molten salt pump. Implement the exothermic heat supply process: High-temperature molten salt enters the molten salt heating device (70-3) and the molten salt industrial steam generation device (70-4) respectively through the molten salt pipeline (70-0) under the action of the molten salt pump. In these devices, the high-temperature molten salt exchanges heat with water, and the hot water or steam generated after water heat exchange respectively reaches and meets the external heating demand (130) and the external industrial steam demand (140) through the heat pipeline (120); the high-temperature molten salt becomes low-temperature molten salt after heat exchange, and it enters the low-temperature molten salt storage tank (70-2) through the molten salt pipeline (70-0) under the action of the molten salt pump. Implement the complete decoupling function of thermal power: Decouple the heat storage capacity and the power generation of the gas turbine. Since the heat energy of the molten salt heat storage system (70) comes from the waste heat of the flue gas after gas turbine power generation and the heat energy generated by supplementary combustion of the supplementary combustion system (72), the coupling relationship between the heat storage capacity and the power generation of the gas turbine is thus eliminated; Decouple the heat supply and the power generation of the gas turbine. Since the heat energy of the molten salt heat storage system (70) comes from the waste heat of the flue gas after gas turbine power generation and the heat energy generated by supplementary combustion of the supplementary combustion system (72), the exothermic process includes exothermic power generation and exothermic heat supply, and the exothermic power generation and exothermic heat supply operate independently, thus eliminating the coupling relationship between the heat supply and the power generation of the gas turbine.

[0025] As Figure 4 shown in the structural schematic diagram of a flue gas internal supplementary combustion and external ignition supplementary combustion system, The working process of the described flue gas internal supplementary combustion and external ignition system (72) is as follows: The flue gas first passes through the pre-supplementary combustion flue gas temperature and pressure measuring instrument (72-4) upstream of the supplementary combustion device (72-2) to measure the temperature and pressure values of the flue gas before supplementary combustion. The temperature and pressure values of the flue gas before supplementary combustion are transmitted to the supplementary combustion intelligent control system standby through the transmitter. When the flue gas passes through the afterburning device (72-2), it continues to flow downstream after being heated by the afterburning device (72-2); the combustion observation video monitor (72-6) of the afterburning nozzle records the combustion conditions of all nozzles in the afterburning device (72-2) through the afterburning nozzle combustion observation window (72-3), and the video signal is transmitted into the afterburning intelligent control system through the video signal line. The results after being analyzed and processed by AI technology at this place are stored for standby; After the flue gas is afterburned by the afterburning device (72-2), the temperature and pressure values of the afterburned flue gas are measured by the afterburned flue gas temperature and pressure measuring instrument (72-5), and the temperature and pressure values of the afterburned flue gas are transmitted into the afterburning intelligent control system through the transmitter for standby; The temperature and pressure values of the flue gas before afterburning, the temperature and pressure values of the flue gas after afterburning, which are transmitted into the afterburning intelligent control system for standby, the results after being analyzed and processed by AI technology of the combustion conditions of all nozzles in the afterburning device (72-2) recorded by the afterburning nozzle combustion observation video monitor (72-6) and stored in the afterburning intelligent control system, the results after being analyzed and processed by AI technology of the ignition conditions of all afterburning ignition chambers in the afterburning device (72-2) recorded by the afterburning ignition video monitor record (72-7) and stored in the afterburning intelligent control system, the first afterburning air electric valve (72-2-1-7), the first afterburning electric igniter (72-2-1-8), the first afterburning gas electric valve (72-2-1-10), the mth afterburning air electric valve (72-2-m-7), the mth afterburning electric igniter (72-2-m-8) and the mth afterburning gas electric valve (72-2-m-10) form a relationship interlock, and the control logic is executed by the algorithm in the afterburning intelligent control system.

[0026] Such as Figure 5 A structural schematic diagram of an afterburner and Figure 6 is a structural schematic diagram of a nozzle shown,[[ID=X]] When the flue gas needs to be afterburned, the process of the afterburning device (72-2) from ignition to normal operation is as follows: When the flue gas needs to be afterburned, the algorithm in the afterburning intelligent control system issues an instruction to open the first afterburning air electric valve (72-2-1-7) and / or the mth afterburning air electric valve (72-2-m-7). After 1 to 2 seconds; The algorithm in the afterburning intelligent control system issues an instruction to simultaneously open the first afterburning electric igniter (72-2-1-8) and the first afterburning gas electric valve (72-2-1-10), and / or the mth afterburning electric igniter (72-2-m-8) and the mth afterburning gas electric valve (72-2-m-10); At this time, it can be observed in the first afterburning ignition observation window (72-2-1-5) and / or the mth afterburning ignition observation window (72-2-m-5) that the mixed gas in the first afterburning ignition chamber (72-2-1-4) and / or the mth afterburning ignition chamber (72-2-m-4) has been ignited. After the ignition video information is recorded by the afterburning ignition video monitor (72-7), it is transmitted to the afterburning intelligent control system for storage. The result of the video information of the ignition situation of all afterburning ignition chambers in the afterburning device (72-2) analyzed and processed by AI technology is a numerical value representing ignition. After receiving this numerical value, the algorithm in the afterburning intelligent control system issues an instruction to close the first afterburning electric igniter (72-2-1-8) and / or the mth afterburning electric igniter (72-2-m-8); At the same time, the algorithm in the afterburning intelligent control system issues an instruction to increase the opening degrees of the first afterburning air electric valve (72-2-1-7) and the first afterburning gas electric valve (72-2-1-10), and / or the mth afterburning air electric valve (72-2-m-7) and the mth afterburning gas electric valve (72-2-m-10), that is, an instruction to increase the flow rate; At this time, the flow rate of the mixed gas entering the first afterburning ignition chamber (72-2-1-4) and / or the mth afterburning ignition chamber (72-2-m-4) gradually increases. By controlling the flow rate ratio of air and gas in the mixed gas through the algorithm, the flame flows forward along with the flow of the mixed gas; the flame sequentially passes through the first afterburning mixing pipe (72-2-1-3), the first afterburning branch pipe loop (72-2-1-2) and enters and sprays out from all the first afterburning nozzles (72-2-1-1), and / or sequentially passes through the mth afterburning mixing pipe (72-2-m-3), the mth afterburning branch pipe loop (72-2-m-2) and enters and sprays out from all the mth afterburning nozzles (72-2-m-1); At this time, it can be observed in the afterburning nozzle combustion observation window (72-3) the combustion situation of the mixed gas of all afterburning nozzles in the afterburning device (72-2). After the combustion situation video information is recorded by the afterburning nozzle combustion observation video monitor (72-6), it is transmitted to the afterburning intelligent control system for storage. The result of the video information of the combustion situation of the mixed gas of all afterburning nozzles in the afterburning device (72-2) analyzed and processed by AI technology is a numerical value representing ignition. After receiving this numerical value, the algorithm in the afterburning intelligent control system issues an instruction to maintain the current opening degrees of the first afterburning air electric valve (72-2-1-7) and the first afterburning gas electric valve (72-2-1-10), and / or the mth afterburning air electric valve (72-2-m-7) and the mth afterburning gas electric valve (72-2-m-10); Subsequently, the afterburning system is in a normal operation state; The results of the numerical values of the flue gas temperature and pressure before afterburning and the numerical values of the flue gas temperature and pressure after afterburning transmitted to the backup of the afterburning intelligent control system and analyzed and processed by AI technology are used as a reference for judging whether the afterburning system is operating normally.

[0027] The working principle of the afterburning device (72-2) to achieve more uniform and efficient heat transfer during afterburning inside the flue gas is as follows: Because, firstly, the pressure of the flue gas on the same isobar is the same; secondly, the axis of the first afterburning branch pipe circuit (72-2-1-2) coincides with the first isobar of the flue gas (72-1-1), and the first afterburning branch pipe circuit (72-2-1-2) is a connected circuit; the axis of the first afterburning nozzle (72-2-1-1) is along the flue gas flow direction and perpendicular to the axis of the first afterburning branch pipe circuit (72-2-1-2), and the first afterburning nozzle (72-2-1-1) is connected to the first afterburning branch pipe circuit (72-2-1-2) in a through manner, and / or the axis of the mth afterburning branch pipe circuit (72-2-m-2) coincides with the mth isobar of the flue gas (72-1-m), and the mth afterburning branch pipe circuit (72-2-m-2) is a connected circuit; the axis of the mth afterburning nozzle (72-2-m-1) is along the flue gas flow direction and perpendicular to the axis of the mth afterburning branch pipe circuit (72-2-m-2), and the mth afterburning nozzle (72-2-m-1) is connected to the mth afterburning branch pipe circuit (72-2-m-2) in a through manner; therefore, with the above layout, the pressure at each afterburning nozzle can be ensured to be the same, so that the premixed gas for afterburning can reach all the afterburning nozzles evenly for combustion; Because, firstly, the first isobar of the flue gas (72-1-1) and the mth isobar of the flue gas (72-1-m) selected at the flue gas cross-section are evenly distributed at this cross-section; secondly, multiple first afterburning nozzles (72-2-1-1) are evenly arranged along the axis of the first afterburning branch pipe circuit (72-2-1-2), and / or multiple mth afterburning nozzles (72-2-m-1) are evenly arranged along the axis of the mth afterburning branch pipe circuit (72-2-m-2); therefore, with the above layout, the heat distribution during afterburning on the flue gas cross-section can be ensured to be relatively uniform; The internal profile lines of all the afterburning nozzles in the described afterburning device (72-2) are all hyperbolas. This structure can not only improve the combustion efficiency of the premixed gas, but also improve the heat transfer efficiency of the flue gas after combustion. From large to small at the lower part, it can increase the kinetic energy of the flue gas and the exhaust speed; from small to large at the upper part, it gradually diffuses into the original flue gas, which can reduce the exhaust resistance of the flue gas generated by afterburning.

[0028] The above has specifically described an embodiment of the present invention, but the content described is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. Any simple modification, equivalent change and modification made according to the scope of the present invention application should still be within the scope covered by the patent of the present invention.

Claims

1. A combustion-type flue gas molten salt heat exchanger denitrification integrated device, characterized in that: It includes a burner system (72), a primary flue gas molten salt heat exchange assembly (73-1), a flue gas denitrification assembly (74), and a tertiary flue gas molten salt heat exchange assembly (73-3); the flue gas is the exhaust gas generated after the gas turbine generates electricity; The afterburner system (72) is located near the flue gas inflow point of the afterburner type flue gas molten salt heat exchanger integrated device (71); along the direction of flue gas inflow: the afterburner system (72) is connected to the first-stage flue gas molten salt heat exchanger assembly (73-1) through the flue gas pipeline (60); the first-stage flue gas molten salt heat exchanger assembly (73-1) is connected to the SCR flue gas denitrification assembly (74) through the flue gas pipeline (60); the SCR flue gas denitrification assembly (74) is connected to the third-stage flue gas molten salt heat exchanger assembly (73-3) through the flue gas pipeline (60). The molten salt inlet of the third-stage flue gas molten salt heat exchanger assembly (73-3) is connected to the molten salt outlet of the low-temperature molten salt storage tank (70-2) via a molten salt pipeline (70-0); the molten salt outlet of the third-stage flue gas molten salt heat exchanger assembly (73-3) is connected to the molten salt inlet of the first-stage flue gas molten salt heat exchanger assembly (73-1) via a molten salt pipeline (70-0); the molten salt outlet of the first-stage flue gas molten salt heat exchanger assembly (73-1) is connected to the molten salt inlet of the high-temperature molten salt storage tank (70-1) via a molten salt pipeline (70-0). The afterburner system (72) includes at least one afterburner device (72-2); The aforementioned afterburning device (72-2) is used to afterburn the exhaust gas generated after the gas turbine generates electricity; The cross-section of the high-temperature exhaust gas duct of the gas turbine has the first isobaric line (72-1-1) to the m-th isobaric line (72-1-m); the pressure of the flue gas on the same isobaric line is the same; the position of the first isobaric line (72-1-1) to the m-th isobaric line (72-1-m) is obtained by numerical simulation calculation; The afterburning device (72-2) includes at least one first afterburning nozzle (72-2-1-1), a first afterburning branch circuit (72-2-1-2), a first afterburning mixing pipe (72-2-1-3), a first afterburning ignition chamber (72-2-1-4), a first afterburning ignition observation window (72-2-1-5), a first afterburning air pipe (72-2-1-6), a first afterburning air electric valve (72-2-1-7), a first afterburning electric igniter (72-2-1-8), a first afterburning gas pipe (72-2-1-9), a first afterburning gas electric valve (72-2-1-10), at least one m-th afterburning nozzle (72-2-m-1), and the m-th afterburning branch circuit (72-2-1-2). The combustion device (72-2) comprises m combustion branch circuits, combustion mixing pipes (72-2-m-3), combustion ignition chambers (72-2-m-4), combustion ignition observation windows (72-2-m-5), combustion air pipes (72-2-m-6), combustion air electric valves (72-2-m-7), combustion electric igniters (72-2-m-8), combustion gas pipes (72-2-m-9), and combustion gas electric valves (72-2-m-10); the combustion device (72-2) consists of m combustion branch circuits, combustion mixing pipes, combustion ignition chambers, combustion air pipes, combustion air electric valves, combustion electric igniters, combustion gas pipes, and combustion gas electric valves; where m is a natural number. The axis of the first supplementary combustion branch circuit (72-2-1-2) coincides with the first equal pressure line of flue gas (72-1-1), and the first supplementary combustion branch circuit (72-2-1-2) is a connected circuit; The axis of the first afterburning nozzle (72-2-1-1) is along the flue gas flow direction and perpendicular to the axis of the first afterburning branch circuit (72-2-1-2). The first afterburning nozzle (72-2-1-1) is connected to the first afterburning branch circuit (72-2-1-2). Multiple first afterburning nozzles (72-2-1-1) are evenly arranged along the axis of the first afterburning branch circuit (72-2-1-2). The axis of the first afterburning mixing pipe (72-2-1-3) is connected to the axis of the first afterburning branch pipe circuit (72-2-1-2), and the first afterburning mixing pipe (72-2-1-3) and the first afterburning branch pipe circuit (72-2-1-2) are connected in a continuous manner; The symmetry line of the first afterburning ignition chamber (72-2-1-4) is connected in the same direction as the axis of the first afterburning mixing pipe (72-2-1-3), and the first afterburning ignition chamber (72-2-1-4) and the first afterburning mixing pipe (72-2-1-3) are connected in a through manner; The first afterburning observation window (72-2-1-5) is set on the first afterburning chamber (72-2-1-4), and its setting method and number are to facilitate the observation and determination of the ignition situation in the first afterburning chamber (72-2-1-4); The axis of the first afterburning air pipe (72-2-1-6) is obliquely connected to the symmetrical line of the first afterburning ignition chamber (72-2-1-4), and the first afterburning air pipe (72-2-1-6) and the first afterburning ignition chamber (72-2-1-4) are obliquely connected; a first afterburning air electric valve (72-2-1-7) is provided on the first afterburning air pipe (72-2-1-6) to control the air flow. The axis of the first supplementary combustion gas pipe (72-2-1-9) is connected in the same direction as the symmetrical line of the first supplementary combustion ignition chamber (72-2-1-4). The first supplementary combustion gas pipe (72-2-1-9) is inserted into the first supplementary combustion ignition chamber (72-2-1-4) for a certain length and then connected to it. The first supplementary combustion gas pipe (72-2-1-9) is equipped with a first supplementary combustion gas electric valve (72-2-1-10) to control the gas flow rate. The first supplementary combustion electric igniter (72-2-1-8) is connected at one end to the wall of the first supplementary combustion gas pipe (72-2-1-9) via a wire, and at the other end is equipped with at least one ignition probe. One end of the ignition probe is connected to the first supplementary combustion electric igniter (72-2-1-8) via a wire, and the other end is not in contact with the opening of the first supplementary combustion gas pipe (72-2-1-9) after it has been inserted into the first supplementary combustion ignition chamber (72-2-1-4) for a certain length. The distance is suitable for generating an electric spark after being energized. The first supplementary combustion electric igniter (72-2-1-8) is equipped with a low-voltage power supply. The axis of the m-th supplementary combustion branch circuit (72-2-m-2) coincides with the m-th isobaric line of the flue gas (72-1-m), and the m-th supplementary combustion branch circuit (72-2-m-2) is a connected circuit; The axis of the m-th afterburning nozzle (72-2-m-1) is along the flue gas flow direction and perpendicular to the axis of the m-th afterburning branch circuit (72-2-m-2). The m-th afterburning nozzle (72-2-m-1) is connected to the m-th afterburning branch circuit (72-2-m-2). Multiple m-th afterburning nozzles (72-2-m-1) are evenly arranged along the axis of the m-th afterburning branch circuit (72-2-m-2). The axis of the m-th supplementary combustion mixing pipe (72-2-m-3) is connected to the axis of the m-th supplementary combustion branch pipe circuit (72-2-m-2), and the m-th supplementary combustion mixing pipe (72-2-m-3) and the m-th supplementary combustion branch pipe circuit (72-2-m-2) are connected in a continuous manner; The symmetry line of the m-th afterburning ignition chamber (72-2-m-4) is connected in the same direction as the axis of the m-th afterburning mixing pipe (72-2-m-3), and the m-th afterburning ignition chamber (72-2-m-4) and the m-th afterburning mixing pipe (72-2-m-3) are connected in a through manner; The m-th supplementary combustion ignition observation window (72-2-m-5) is set on the m-th supplementary combustion ignition chamber (72-2-m-4), and the way and number of its setting are to facilitate the observation and determination of the ignition situation in the m-th supplementary combustion ignition chamber (72-2-m-4); The axis of the m-th supplementary combustion air pipe (72-2-m-6) intersects the symmetry line of the m-th supplementary combustion ignition chamber (72-2-m-4) and is obliquely connected; the m-th supplementary combustion air pipe (72-2-m-6) and the m-th supplementary combustion ignition chamber (72-2-m-4) are obliquely connected; the m-th supplementary combustion air pipe (72-2-m-6) is equipped with an m-th supplementary combustion air electric valve (72-2-m-7) to control the air flow. The axis of the m-th supplementary combustion gas pipe (72-2-m-9) is connected in the same direction as the symmetry line of the m-th supplementary combustion ignition chamber (72-2-m-4). The m-th supplementary combustion gas pipe (72-2-m-9) is inserted into the m-th supplementary combustion ignition chamber (72-2-m-4) for a certain length and then connected to it. The m-th supplementary combustion gas pipe (72-2-m-9) is equipped with an m-th supplementary combustion gas electric valve (72-2-m-10) to control the gas flow rate. The m-th supplementary combustion electric igniter (72-2-m-8) has one end connected to the wall of the m-th supplementary combustion gas pipe (72-2-m-9) via a wire, and the other end is equipped with at least one ignition probe. One end of the ignition probe is connected to the m-th supplementary combustion electric igniter (72-2-m-8) via a wire, and the other end is not in contact with the opening of the m-th supplementary combustion gas pipe (72-2-m-9) after it has been inserted into the m-th supplementary combustion ignition chamber (72-2-m-4) for a certain length. The distance is suitable for generating an electric spark after being energized. The m-th supplementary combustion electric igniter (72-2-m-8) is equipped with a low-voltage power supply. The inner contour line (72-1-0) of the flue section is a circle, a square, or a multi-segment closed broken line.

2. The integrated flue gas molten salt heat exchange and denitrification device according to claim 1, characterized in that: The afterburner system (72) includes at least one afterburner device (72-2), at least one afterburner ignition video monitor (72-7), at least one afterburner nozzle combustion observation window (72-3), at least one afterburner nozzle combustion observation video monitor (72-6), a flue gas temperature and pressure measuring instrument before afterburner (72-4), and a flue gas temperature and pressure measuring instrument after afterburner (72-5). Along the direction of the flue gas, at least one hole is opened on the flue wall downstream of the combustion device (72-2), and a combustion observation window (72-3) for the combustion of the combustion nozzle is embedded in each hole; the combustion observation video monitor (72-6) for the combustion of the combustion nozzle is arranged at a certain position outside the flue, and its position and number are determined so as to be able to observe the combustion of all combustion nozzles. An instrument for measuring the temperature and pressure of flue gas before combustion (72-4) is arranged upstream of the combustion device (72-2), with its probe inserted into the flue through the flue wall in the radial direction of the flue. A flue gas temperature and pressure measuring instrument (72-5) is arranged downstream of the afterburning device (72-2), with its probe inserted into the flue through the flue wall in the radial direction of the flue; when the flue gas temperature and pressure measuring instrument (72-5) is arranged upstream of the combustion observation window (72-3) of the afterburning nozzle, it is determined so as not to affect the observation of the combustion of the afterburning nozzle. The aforementioned afterburning ignition video monitor (72-7) is arranged at a certain position outside the flue. The position and number of the monitor are determined so that the ignition situation inside the afterburning ignition chamber of all afterburning devices can be observed. The combustion nozzle, combustion branch circuit and part of the combustion mixing pipe in the combustion device (72-2) are arranged inside the flue and connected to the inner wall of the flue through a support structure; the combustion mixing pipe in the combustion device passes through the flue wall in the radial direction of the flue.

Images