Nitrogen oxide zero-emission low-energy-consumption system
By combining flue gas cooling with a solid adsorbent regeneration device, the problems of ammonia slip and high cost in SCR technology have been solved, achieving near-zero nitrogen oxide emissions and efficient denitrification with low energy consumption, and reducing operating costs and water consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-18
- Publication Date
- 2026-03-13
AI Technical Summary
Existing SCR technology suffers from severe ammonia slip during the denitrification process, leading to air preheater blockage, high operating costs, and difficulty in achieving further recycling of nitrogen oxides and efficient denitrification.
The flue gas is cooled to 40℃-60℃ by a flue gas cooler and then separated into gas and liquid. Nitrogen oxides are adsorbed in an adsorption tank using a solid adsorbent. The adsorbent is then regenerated by a regeneration device and reused. Automated production is achieved by combining circulation pipelines and transfer vehicles.
It achieves near-zero nitrogen oxide emission control, reduces operating costs, improves denitrification efficiency, and reduces water consumption; the adsorbent can be reused.
Smart Images
Figure CN121648696A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of environmental protection and energy recycling, specifically a low-energy system with zero nitrogen oxide emissions. Background Technology
[0002] Traditional SCR (Selective Catalytic Reduction) denitrification technology is based on the mechanism of ammonia injection reduction, which reduces NOx to N2 under specific temperature conditions and with the action of a catalyst, thus achieving nitrogen oxide removal. With the implementation of ultra-low emission standards in my country's power, chemical, and steel industries, SCR technology has made rapid progress.
[0003] Current SCR technology, through a series of measures such as catalyst performance improvement, precise ammonia injection, and flow field optimization, can reduce NOx emissions to as low as 15-20 mg / Nm³. 3 However, prolonged operation at this limit has led to a series of environmental and operational problems, such as increased ammonia slip and ammonium salt blockage in the air preheater. Furthermore, due to limitations in technical principles and ammonia slip control requirements, the catalyst cannot be regenerated and reused throughout the process; the raw materials are consumed in a single step, resulting in high operating costs. Nitrogen oxides are also difficult to further recycle, and SCR is unlikely to further improve denitrification efficiency. Summary of the Invention
[0004] The purpose of this invention is to provide a low-energy consumption system with zero nitrogen oxide emissions to solve the problems mentioned in the background art. This invention first cools the flue gas to 40℃-60℃ using a flue gas cooler, then performs gas-liquid separation, and transports the dried flue gas to an adsorption tank. Through the principle of solid adsorption, it has the advantage of efficiently adsorbing and removing nitrogen oxides in the flue gas, achieving the requirements of near-zero emission control.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a low-energy consumption system with zero nitrogen oxide emissions, comprising a furnace body, a flue gas outlet pipe connected to the furnace body, a fan and a flue gas cooler for preliminary cooling of high-temperature flue gas arranged sequentially along the flue gas outlet direction on the flue gas outlet pipe, a gas-liquid separator arranged after the flue gas cooler, a first flue gas outlet arranged at the top of the gas-liquid separator, an adsorption tank connected to the first flue gas outlet through a pipe, an adsorbent for adsorbing nitrogen oxides in the flue gas arranged in the adsorption tank, the flue gas dried by the gas-liquid separator entering the adsorption tank, a clean flue gas outlet arranged at the top of the adsorption tank, a clean flue gas exhaust pipe arranged at the clean flue gas outlet, and a chimney connected to the end of the clean flue gas exhaust pipe; The bottom of the adsorption tank is equipped with an unloading port for unloading the adsorbent. The adsorbent that has fully adsorbed nitrogen oxides in the adsorption tank is unloaded through the unloading port and then transported to the regeneration device. The saturated adsorbent is regenerated in the regeneration device and then transported back to the adsorption tank.
[0006] As a further embodiment of the present invention, a flue gas detector and a flue gas valve are sequentially installed on the flue gas exhaust pipe along the exhaust direction. The flue gas detector detects that the concentration of nitrogen oxides in the flue gas is less than 3 mg / Nm³. 3 Open the exhaust valve to discharge the flue gas into the chimney.
[0007] As a further embodiment of the present invention, the regeneration device includes a regeneration tank, the top of which is provided with a material inlet and outlet for injecting saturated adsorbent, the material inlet and outlet being manholes, and a support bed for supporting the adsorbent inside the regeneration tank, the support bed being a horizontally arranged grid plate with a wire mesh layer on the grid plate, and an air distributor below the support bed, the air distributor including an air distribution coil, the upper surface of which is provided with air holes evenly distributed along the direction of the coil, one end of the coil extending as an extension pipe, the extension pipe being provided with an air inlet valve, the extension pipe passing through the regeneration tank and connected to an external high-temperature air supply source, and the end of the coil being sealed.
[0008] As a further embodiment of the present invention, the upper part of the regeneration tank is provided with a circulation port, and a circulation pipeline is provided between the circulation port and the furnace body. A circulation check valve and a circulation valve are provided on the circulation pipeline along the gas outlet direction.
[0009] As a further embodiment of the present invention, the adsorption tank and the regeneration tank are arranged close to each other. The unloading port of the regeneration tank is connected to an unloading pipeline, and the unloading pipeline is connected to a first discharge chain bucket machine. The first discharge chain bucket machine transports the saturated adsorbent to the material inlet and outlet of the regeneration tank. A second discharge chain bucket machine is provided at the material inlet and outlet, and the second discharge chain bucket machine circulates the purified adsorbent back to the adsorption tank.
[0010] As a further embodiment of the present invention, the adsorption tanks are distributed in a dispersed manner, with multiple adsorption tanks corresponding to one regeneration tank. The unloading port of the regeneration tank is connected to an unloading pipeline, and a transfer vehicle is provided below the unloading pipeline. The saturated adsorbent is transported to the transfer vehicle through the unloading pipeline and then transferred to the regeneration tank by the transfer vehicle.
[0011] As a further embodiment of the present invention, a first smoke outlet valve is provided on the smoke outlet pipe between the furnace body and the blower, a second smoke outlet valve is provided on the smoke outlet pipe between the flue gas cooler and the gas-water separator, a third smoke outlet valve is provided between the gas-water separator and the adsorption tank, and an unloading valve is provided on the unloading pipe.
[0012] As a further embodiment of the present invention, the gas-water separator is provided with a water outlet pipe at the bottom, and the free end of the water outlet pipe is connected to an external circulating water replenishment system.
[0013] As a further embodiment of the present invention, the flue gas cooler cools the high-temperature flue gas to a temperature range of 40°C-60°C, and the flue gas condenses into flue gas condensate which is then circulated to the gas-liquid separator for gas-liquid separation.
[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The system includes a furnace body, on which a flue gas outlet pipe is connected. Along the flue gas outlet direction, a fan and a flue gas cooler for preliminary cooling of the high-temperature flue gas are sequentially installed on the flue gas outlet pipe. The flue gas cooler first cools the flue gas to 40℃-60℃, then performs gas-liquid separation, and the dried flue gas is transported to an adsorption tank. Through the principle of solid adsorption, it can efficiently adsorb and remove nitrogen oxides in the flue gas, achieving near-zero emission control requirements; and has the following advantages: (1) The furnace body is connected to a flue gas outlet pipe. Along the flue gas outlet direction, a fan and a flue gas cooler for preliminary cooling of high-temperature flue gas are installed in sequence. The fan quickly and efficiently draws in high-temperature flue gas for circulation, and the flue gas cooler cools the high-temperature flue gas to a temperature range of 40℃-60℃, which helps to fully separate the flue gas and moisture.
[0015] (2) A gas-liquid separator is installed after the flue gas cooler. The flue gas, after being dried by the gas-liquid separator, enters the adsorption tank. The adsorption tank contains an adsorbent for adsorbing nitrogen oxides in the flue gas. Based on the principle of solid adsorption, nitrogen oxides are deeply adsorbed and removed. The concentration of nitrogen oxides in the flue gas is detected by a flue gas detector to be less than 3 mg / Nm³. 3 Open the exhaust valve to discharge the flue gas into the chimney.
[0016] The removal efficiency of nitrogen oxides is high, and the generated harmless N2 is emitted into the air, minimizing environmental pollution and achieving the requirements of near-zero emission control.
[0017] (3) The bottom of the adsorption tank is equipped with an unloading port for unloading the adsorbent. After the adsorbent that has fully adsorbed nitrogen oxides in the adsorption tank is unloaded through the unloading port, it is transported to the regeneration device. The saturated adsorbent is regenerated in the regeneration device and then transported back to the adsorption tank. The adsorbent can be reused after regeneration, resulting in low consumption and low operating costs.
[0018] (4) The regeneration device includes a regeneration tank. The top of the regeneration tank is provided with a material inlet and outlet for injecting saturated adsorbent. The material inlet and outlet are manholes. The manholes facilitate the loading and unloading of the internal parts of the regeneration tank, as well as the loading and unloading of the adsorbent, and facilitate transfer.
[0019] (5) The regeneration tank is equipped with a support bed for supporting the adsorbent. The support bed is a horizontally arranged grid plate with a wire mesh layer. The support bed provides stable and effective support for the adsorbent. A gas distributor is provided below the support bed. The gas distributor is set independently from the adsorbent, which helps to facilitate the effective and uniform flow of gas. The gas distributor includes a gas distribution coil. The upper surface of the gas distribution coil is provided with air holes evenly distributed along the direction of the coil.
[0020] (6) The regeneration tank is provided with a circulation port at the top, and a circulation pipeline is provided between the circulation port and the furnace body. A circulation check valve and a circulation valve are provided on the circulation pipeline along the gas outlet direction. Inside the regeneration tank, a small amount of high-temperature flue gas (around 300°C) or high-temperature air is drawn to purge and heat the adsorbent. The desorbed nitrogen oxides return to the furnace with the purge gas and are reduced by the reducing atmosphere in the furnace, thus achieving ammonia-free denitrification treatment.
[0021] (7) The adsorption tank and the regeneration tank are set close to each other. The adsorbent is automatically and efficiently transported between the two tanks by the cooperation of the first discharge chain bucket machine and the second unloading chain bucket machine. The transport efficiency is high and automated production is realized.
[0022] (8) The adsorption tanks are distributed and can be transported over long distances by a transfer vehicle. This allows for the realization of a low intensity of nitrogen oxide emissions, but with many unloading ports and a large total emission volume, thus meeting the need for centralized regeneration of nitrogen oxides collected by dispersed adsorption.
[0023] (9) The air-water separator is connected to the circulating water replenishment system through the outlet water pipe. The separated clean water is put back into the circulating water system for reuse, reducing the demand for fresh tap water or other water sources, and reducing water consumption and replenishment treatment costs. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the emission process of the large nitrogen oxide emission source of the present invention; Figure 2 This is a schematic diagram of the emission process of the dispersed nitrogen oxide emission source of the present invention; Figure 3 This is a flowchart illustrating the adsorbent regeneration process in the dispersed nitrogen oxide emission process of the present invention. Figure 4 This is a schematic diagram of the regeneration device of the present invention; Figure 5 This is a comparative analysis table of flue gas condensate and circulating water makeup water quality for the present invention.
[0025] In the diagram: 1-furnace body, 2-smoke outlet pipe, 201-first smoke outlet valve, 202-second smoke outlet valve, 3-fan, 4-gas-water separator, 401-third smoke outlet valve, 402-water outlet pipe, 5-adsorption tank, 501-unloading pipe, 512-unloading valve, 502-clean smoke exhaust pipe, 521-flue gas detector, 522-smoke exhaust valve, 503-adsorbent, 6-first discharge chain conveyor, 601-second discharge chain conveyor Chain bucket machine, 7-chimney, 8-regeneration device, 801-circulation pipeline, 811-circulation check valve, 812-circulation valve, 802-extension pipe, 821-inlet valve, 803-manhole, 804-saturated adsorbent, 805-wire mesh layer, 806-grating plate, 807-air distribution coil, 871-air vent, 808-regeneration tank, 9-transfer vehicle, 10-to-circulation water replenishment system, 11-flue gas cooler. Detailed Implementation
[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1
[0027] Please see the appendix Figure 1 -Appendix Figure 3 A low-energy system with zero nitrogen oxide emissions includes a furnace body 1, a flue gas outlet pipe 2 connected to the furnace body, a fan 3 and a flue gas cooler 11 for preliminary cooling of high-temperature flue gas arranged sequentially along the flue gas outlet direction on the flue gas outlet pipe, and a first flue gas outlet valve 201 provided on the flue gas outlet pipe between the furnace body and the fan. When the system starts to operate, the first flue gas outlet valve is opened and the fan 3 is started. The high-temperature flue gas is transported along the flue gas outlet pipe to the flue gas cooler 11, and the flue gas cooler 11 cools the high-temperature flue gas to a temperature of 40°C.
[0028] A gas-liquid separator 4 is installed after the flue gas cooler. A second flue gas valve 202 is installed on the flue gas outlet pipe between the flue gas cooler 11 and the gas-liquid separator 4. When the second flue gas outlet valve 202 is opened, the flue gas condensate generated during the flue gas cooling process is circulated to the gas-liquid separator for gas-liquid separation.
[0029] Please see the appendix Figure 5 The gas-water separator 4 has a water outlet pipe 402 at its bottom, and the free end of the water outlet pipe is connected to an external circulating water replenishment system 10. The clean water separated by the gas-water separator re-enters the circulating water replenishment system 10, and the quality of the clean water meets the requirements of the circulating water replenishment system.
[0030] When put into use as makeup water for circulating water, the high-temperature condensate can increase the inlet water temperature of the circulating water system, reduce the energy consumption of the circulating water heating or cooling process, and recover energy.
[0031] The gas-water separator 4 is equipped with a first exhaust port at the top, and the first exhaust port is connected to the adsorption tank 5 through a pipeline. A third exhaust valve 401 is provided between the gas-water separator and the adsorption tank.
[0032] Open the third flue gas valve 401, and the dried flue gas enters the adsorption tank 5.
[0033] After being dried by the gas-liquid separator, the flue gas enters the adsorption tank 5. The adsorption tank contains adsorbent 503, a highly efficient adsorbent specifically designed for nitrogen oxides. This adsorbent is a microcrystalline material-based denitrification adsorbent, made from high-end microcrystalline materials. High-end microcrystalline materials are inorganic high-performance adsorbents, distinct from traditional activated carbon and iron oxide adsorbents, possessing the core advantages of being non-flammable, non-explosive, hydrophobic, and moisture-proof. The adsorbent's microstructure features abundant pores and active sites, physically adsorbing nitrogen oxides and enhancing adsorption selectivity through weak chemical interactions between surface-active groups and NOx, thus meeting the deep removal requirements of low-concentration NOx at the end of the process. The adsorbent efficiently adsorbs and removes nitrogen oxides from the flue gas. It can also simultaneously adsorb residual sulfides, chlorides, tar, and other impurities in the flue gas, preventing these substances from affecting the operation of subsequent equipment or poisoning conventional denitrification catalysts.
[0034] The adsorption tank 5 is equipped with a clean smoke exhaust port at its upper part, and a clean smoke exhaust pipe 502 is installed at the clean smoke exhaust port. The end of the clean smoke exhaust pipe is connected to a chimney 7. A flue gas detector 521 and a smoke exhaust valve 522 are installed sequentially along the exhaust direction on the clean smoke exhaust pipe. The flue gas detector detects that the concentration of nitrogen oxides in the flue gas is less than 3 mg / Nm³. 3 Open the exhaust valve to discharge the flue gas into the chimney, and then into the air.
[0035] The bottom of the adsorption tank 5 is provided with an unloading port for unloading the adsorbent. The adsorbent that has fully adsorbed nitrogen oxides in the adsorption tank 5 is unloaded through the unloading port and then transported to the regeneration device 8. The saturated adsorbent is regenerated in the regeneration device and then transported back to the adsorption tank. Example 2
[0036] Please see the appendix Figure 4 The regeneration device 8 includes a regeneration tank 808. The top of the regeneration tank is provided with a material inlet and outlet for injecting saturated adsorbent. The material inlet and outlet are manholes 803. The regeneration tank is provided with a support bed for supporting the saturated adsorbent 804. The support bed is a horizontally arranged grid plate 806. The grid plate is provided with a wire mesh layer 805. Both the grid plate and the wire mesh layer are detachable structures.
[0037] A gas distributor is provided below the support bed. The gas distributor includes a gas distribution coil 807, which is composed of multiple half-pipes sealed together. The upper surface of the gas distribution coil is provided with air holes 871 evenly distributed along the direction of the coil. One end of the coil extends into an extension pipe 802, which is equipped with an air inlet valve 821. The extension pipe passes through the regeneration tank and is connected to an external high-temperature air supply source. The end of the coil is sealed.
[0038] High-temperature air is supplied from a high-temperature air source and enters the air distribution coil. It is then blown out at high speed through each air distribution hole, passing upwards through the grid plate 806 and the wire mesh layer 805, subjecting the adsorbent to high-temperature purging at temperatures reaching 120-250℃. This weakens the adsorption force between the adsorbent and nitrogen oxides and sulfides, causing pollutants to detach from the adsorption sites. The upward airflow carries away the desorbed gaseous nitrogen oxides and sulfides, preventing re-adsorption within the bed. Simultaneously, it washes away residual dust and impurities on the adsorbent surface, completing the regeneration of the adsorbent. The regenerated adsorbent can then be reused.
[0039] The regeneration tank 808 is provided with a circulation port at the top, and a circulation pipeline 801 is provided between the circulation port and the furnace body. A circulation check valve 811 and a circulation valve 812 are provided on the circulation pipeline along the gas outlet direction.
[0040] During the adsorbent regeneration process, the circulation valve 812 is opened, and the gas containing nitrogen oxides and sulfides flows back into the furnace for reduction treatment, or is recycled by resource utilization into nitric acid and nitrate products. Example 3
[0041] The adsorption tank 5 and the regeneration tank 808 are located close to each other. The unloading port of the regeneration tank is connected to an unloading pipeline, which is connected to a first discharge chain bucket machine 6. The first discharge chain bucket machine transports the saturated adsorbent to the material inlet and outlet of the regeneration tank 808. A second discharge chain bucket machine 601 is provided at the material inlet and outlet. The second discharge chain bucket machine circulates the purified adsorbent back to the adsorption tank.
[0042] In the denitrification process of large nitrogen oxide emission sources, the adsorbent after adsorption saturation is conveyed to the regeneration tank by the first discharge chain bucket elevator 6 for heating and regeneration. The regenerated adsorbent is then recycled to the adsorption tank 5 by the second discharge chain bucket elevator 601. Example 4
[0043] The adsorption tanks 5 are distributed in a dispersed manner, with multiple adsorption tanks corresponding to one regeneration tank 808. The unloading port of the regeneration tank is connected to an unloading pipeline, and an unloading valve 512 is installed on the unloading pipeline. A transfer vehicle is installed below the unloading pipeline. The saturated adsorbent is transported to the transfer vehicle through the unloading pipeline and then transferred to the regeneration tank 808 by the transfer vehicle.
[0044] Dispersed, small-scale nitrogen oxide emission sources have low individual emission intensity from each outlet, but a large number of outlets result in a large total emission volume. The solution involves dispersed adsorption to collect nitrogen oxides and centralized regeneration treatment.
[0045] Please see the appendix Figure 2 The collection points are scattered across various small-scale nitrogen oxide emission sources within the factory area. After adsorption saturation, the adsorbent in the adsorption tanks (5) at each collection point is transported via dedicated transfer vehicles to a centralized regeneration tank for centralized regeneration. The regenerated adsorbent is then transported back to each collection point via transfer vehicles to replenish the adsorption tanks. Fresh adsorbent replenishment and saturated adsorbent transfer are carried out weekly or monthly, depending on the amount of nitrogen oxide emissions.
[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A low-energy system with zero nitrogen oxide emissions, characterized in that: The furnace includes a furnace body (1), a flue gas pipe (2) connected to the furnace body, a fan (3) and a flue gas cooler (11) for preliminary cooling of high-temperature flue gas are arranged in sequence along the flue gas outlet direction on the flue gas pipe, a gas-water separator (4) is arranged after the flue gas cooler, a first flue gas outlet is arranged at the top of the gas-water separator, an adsorption tank (5) is connected to the first flue gas outlet through a pipe, an adsorbent (503) for adsorbing nitrogen oxides in the flue gas is arranged in the adsorption tank, the flue gas after being dried by the gas-water separator enters the adsorption tank (5), a clean flue gas outlet is arranged at the top of the adsorption tank, a clean flue gas pipe (502) is arranged at the clean flue gas outlet, and a chimney (7) is connected to the end of the clean flue gas pipe; The bottom of the adsorption tank is provided with an unloading port for unloading the adsorbent. The adsorbent that has fully adsorbed nitrogen oxides in the adsorption tank is unloaded along the unloading port and then transported to the regeneration device (8). The saturated adsorbent is regenerated in the regeneration device and then transported back to the adsorption tank (5).
2. The low-energy system with zero nitrogen oxide emissions according to claim 1, characterized in that: The clean smoke exhaust pipe (502) is equipped with a smoke detector (521) and a smoke exhaust valve (522) sequentially along the smoke exhaust direction. The smoke detector (521) detects that the concentration of nitrogen oxides in the smoke is less than 3 mg / Nm³. 3 Open the exhaust valve (522) to discharge the flue gas into the chimney (7).
3. The low-energy system with zero nitrogen oxide emissions according to claim 2, characterized in that: The regeneration device (8) includes a regeneration tank (808), the top of which is provided with a material inlet and outlet for injecting saturated adsorbent (804), the material inlet and outlet being manholes (803), a support bed for supporting the adsorbent inside the regeneration tank, the support bed being a horizontally arranged grid plate (806), the grid plate being provided with a wire mesh layer (805), a gas distributor being provided below the support bed, the gas distributor including a gas distribution coil (807), the upper surface of the gas distribution coil being provided with air holes (871) evenly distributed along the direction of the coil, one end of the coil extending as an extension pipe (802), the extension pipe being provided with an air inlet valve (821), the extension pipe passing through the regeneration tank and connected to an external high-temperature gas supply source, the end of the coil being sealed.
4. The low-energy system with zero nitrogen oxide emissions according to claim 3, characterized in that: The regeneration tank (808) is provided with a circulation port at the top, and a circulation pipeline (801) is provided between the circulation port and the furnace body. A circulation check valve (811) and a circulation valve (812) are provided on the circulation pipeline along the gas outlet direction.
5. The low-energy system with zero nitrogen oxide emissions according to claim 4, characterized in that: The adsorption tank (5) and the regeneration tank (808) are arranged close to each other. The unloading port of the regeneration tank is connected to an unloading pipeline (501), and the unloading pipeline is connected to a first discharge chain bucket machine (6). The first discharge chain bucket machine (6) transports the saturated adsorbent to the material inlet and outlet of the regeneration tank. A second discharge chain bucket machine (601) is provided at the material inlet and outlet. The second discharge chain bucket machine (601) circulates the purified adsorbent to the adsorption tank (5).
6. The low-energy system with zero nitrogen oxide emissions according to claim 5, characterized in that: The adsorption tanks (5) are arranged in a dispersed manner, with multiple adsorption tanks corresponding to one regeneration tank (808). The unloading port of the regeneration tank is connected to an unloading pipeline (501). A transfer vehicle (9) is provided below the unloading pipeline. The saturated adsorbent is transported to the transfer vehicle through the unloading pipeline (501) and then transferred to the regeneration tank (808) by the transfer vehicle.
7. The low-energy system with zero nitrogen oxide emissions according to claim 6, characterized in that: A first smoke outlet valve (201) is provided on the smoke outlet pipe (2) between the furnace body (1) and the blower (3), a second smoke outlet valve (202) is provided on the smoke outlet pipe between the flue gas cooler (11) and the gas-water separator (4), a third smoke outlet valve (401) is provided between the gas-water separator (4) and the adsorption tank (5), and an unloading valve (512) is provided on the unloading pipe (501).
8. The low-energy system with zero nitrogen oxide emissions according to claim 1, characterized in that: The gas-water separator (4) is provided with a water outlet pipe (402) at the bottom, and the free end of the water outlet pipe is connected to an external circulating water replenishment system (10).
9. The low-energy system with zero nitrogen oxide emissions according to claim 1, characterized in that: The flue gas cooler (11) cools the high-temperature flue gas to a temperature range of 40℃-60℃, and the flue gas condenses into flue gas condensate, which is then circulated to the gas-liquid separator for gas-liquid separation.