Flue gas spray cooling adsorption system

Abstract

The invention discloses a flue gas spray cooling adsorption system, the flue gas spray cooling adsorption system comprises a spray tower, an adsorption tower and a multi-stage refrigeration device, the spray tower is provided with a multi-stage spray cavity, the spray tower is provided with a flue gas inlet and a flue gas outlet, a spray assembly is arranged in the spray cavity, the flue gas inlet of the adsorption tower is communicated with the flue gas outlet, and the flue gas inlet of the adsorption tower is communicated with the flue gas outlet. The multiple stages of refrigerating devices are in one-to-one correspondence with the multiple stages of spraying cavities, the spraying cavities are provided with liquid outlets, inlets of the refrigerating devices are communicated with the liquid outlets of the corresponding spraying cavities, and outlets of the refrigerating devices are communicated with inlets of the spraying assemblies in the corresponding spraying cavities. Coal-fired flue gas enters the spray tower through the flue gas inlet and sequentially passes through all stages of spray cavities to be cooled to a subzero temperature zone in a stepped mode, and the cooled flue gas is conveyed to the adsorption tower through the flue gas outlet and is subjected to low-temperature adsorption and purification in the adsorption tower to form clean flue gas, so that various pollutants such as SO2, NOx, SO3, Hg, HCl and HF in the flue gas are integrally adsorbed and removed; the removal efficiency of various pollutants in the flue gas is improved.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas treatment, and in particular to a flue gas spray cooling adsorption system. Background Art

[0002] Sulfur dioxide and nitrogen oxides in flue gas generated by coal-fired power plants are important factors that harm the atmospheric environment. Traditional coal-fired power plants often use spray towers to wet flue gas desulfurization, using limestone suspension slurry to directly contact sulfur dioxide in flue gas, so that the limestone slurry reacts with sulfur dioxide and is absorbed, thereby achieving the purpose of desulfurization. The desulfurized flue gas is then transported to an adsorption tower, where the adsorbent is used to adsorb the flue gas, thereby removing nitrogen oxides from the flue gas.

[0003] However, the relevant technologies are mainly aimed at the removal of the three major conventional pollutants: sulfur dioxide, nitrogen oxides and smoke. The removal efficiency of heavy metals such as sulfur trioxide and mercury is not high, and the removal efficiency of trace unconventional pollutants such as volatile organic compounds (VOCs) is relatively low. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention proposes a flue gas spray cooling adsorption system, which allows flue gas to be adsorbed and purified in a sub-zero temperature zone, thereby achieving integrated removal of multiple pollutants.

[0006] The smoke spray cooling adsorption system of the embodiment of the present invention comprises: a spray tower, an adsorption tower and a multi-stage refrigeration device, wherein the spray tower has a multi-stage spray chamber arranged in sequence along the vertical direction, and the spray tower is provided with a smoke inlet connected to the spray chamber located at the lowest level among the multi-stage spray chambers and a smoke outlet connected to the spray chamber located at the highest level among the multi-stage spray chambers, and a spray assembly is provided in the spray chamber to spray and cool the smoke entering the spray tower through the smoke inlet to a sub-zero temperature zone through the spray assemblies in the multi-stage spray chambers in sequence, and discharge the cooled smoke through the smoke outlet. The spray tower, the smoke inlet of the adsorption tower is connected with the smoke outlet, so that the cooled smoke is transported to the adsorption tower for adsorption and purification into clean smoke, the multi-stage refrigeration device corresponds to the multi-stage spray chamber one by one, the spray chamber has a drain port, the inlet of the refrigeration device is connected with the corresponding drain port of the spray chamber, and the outlet of the refrigeration device is connected with the inlet of the spray assembly in the corresponding spray chamber, so that the spray liquid in the spray chamber after heat exchange with the smoke is transported to the refrigeration device through the drain port for cooling, and the cooled spray liquid is transported to the spray assembly.

[0007] In the flue gas spray cooling adsorption system of the embodiment of the present invention, coal-fired flue gas enters the spray tower through the smoke inlet, is step-cooled to the sub-zero temperature zone through each level of spray chamber in turn, and the cooled flue gas is transported to the adsorption tower through the smoke outlet, where it is adsorbed and purified into clean flue gas through low-temperature adsorption, thereby realizing integrated adsorption and removal of multiple pollutants such as SO2, NOx, SO3, Hg, HCl, HF, etc. in the flue gas, thereby improving the removal efficiency of multiple pollutants in the flue gas.

[0008] In some embodiments, a filling assembly is further provided in the spray chamber, and the filling assembly is located below the spray assembly.

[0009] In some embodiments, the packing density of the packing components in the multi-stage spray chamber decreases from bottom to top.

[0010] In some embodiments, the multi-level spray chamber includes a first-level spray chamber, a second-level spray chamber, and a third-level spray chamber arranged in sequence from bottom to top, and the multi-stage refrigeration device includes a first-level refrigeration device corresponding to the first-level spray chamber, a second-level refrigeration device corresponding to the second-level spray chamber, and a third-level refrigeration device corresponding to the third-level spray chamber.

[0011] In some embodiments, a liquid collector is provided at the bottom of each of the second-stage spray chamber and the third-stage spray chamber, and the liquid collector has a liquid collecting tank and a vent;

[0012] The liquid collecting tank in the second-stage spray chamber is used to receive the spray liquid sprayed by the spray assembly in the second-stage spray chamber, the liquid collecting tank in the second-stage spray chamber is connected with the liquid discharge port of the second-stage spray chamber, and the vent in the second-stage spray chamber is used to allow the smoke in the first-stage spray chamber to flow into the second-stage spray chamber and prevent the spray liquid in the second-stage spray chamber from flowing into the first-stage spray chamber;

[0013] The liquid collecting tank in the third-level spray chamber is used to receive the spray liquid sprayed by the spray assembly in the third-level spray chamber, the liquid collecting tank in the third-level spray chamber is connected to the discharge port of the third-level spray chamber, and the ventilation part in the third-level spray chamber is used to allow the smoke in the second-level spray chamber to flow into the third-level spray chamber and prevent the spray liquid in the third-level spray chamber from flowing into the second-level spray chamber.

[0014] In some embodiments, the first-stage spray chamber further has a liquid inlet, and the liquid outlet of the second-stage spray chamber and the liquid outlet of the third-stage spray chamber are respectively connected to the liquid inlet of the first-stage spray chamber through pipelines;

[0015] The flue gas spray cooling adsorption system also includes a circulation pump, the discharge port of the first-stage spray chamber is connected to the inlet of the circulation pump via a pipeline, and the outlet of the circulation pump is connected to the inlet of the first-stage refrigeration device, the inlet of the second-stage refrigeration device and the inlet of the third-stage refrigeration device via a pipeline.

[0016] In some embodiments, the liquid inlet of the first-stage spray chamber is located above the liquid outlet of the first-stage spray chamber.

[0017] In some embodiments, the flue gas spray cooling adsorption system also includes an MVR evaporation device, the outlet of the circulation pump is also connected to the inlet of the MVR evaporation device via a pipeline, and the outlet of the MVR evaporation device is connected to the inlet of the third-stage refrigeration device via a pipeline.

[0018] In some embodiments, valve groups are provided on pipelines between the circulation pump and the first-stage refrigeration device, the second-stage refrigeration device, the third-stage refrigeration device, and the MVR evaporation device.

[0019] In some embodiments, the bottom of the first-stage spray chamber also has a sewage outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of a flue gas spray cooling adsorption system according to an embodiment of the present invention.

[0021] Reference numerals:

[0022] Spray tower 1, first-stage spray chamber 101, second-stage spray chamber 102, third-stage spray chamber 103, smoke inlet 104, smoke outlet 105, liquid inlet 106, sewage outlet 107, spray assembly 11, filler assembly 12, liquid collector 13, first-stage refrigeration device 14, second-stage refrigeration device 15, third-stage refrigeration device 16, circulation pump 17, MVR evaporation device 18,

[0023] Adsorption tower 2. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0025] The flue gas spray cooling adsorption system according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0026] like Figure 1 As shown, the flue gas spray cooling adsorption system of the embodiment of the present invention comprises: a spray tower 1, an adsorption tower 2 and a multi-stage refrigeration device.

[0027] The spray tower 1 has a multi-stage spray chamber arranged in sequence along the vertical direction. A smoke inlet 104 and a smoke outlet 105 are provided on the spray tower 1. The smoke inlet 104 of the spray tower 1 is connected to the spray chamber located at the lowest level in the multi-stage spray chamber, and the smoke outlet 105 of the spray tower 1 is connected to the spray chamber located at the uppermost level in the multi-stage spray chamber, so that the smoke enters the spray tower 1 through the smoke inlet 104, and the smoke flows upward in the spray tower 1, passes through the spray chambers of each level in sequence, and finally is discharged from the spray tower 1 through the smoke outlet 105.

[0028] A spray assembly 11 is provided in the spray chamber, and the spray assembly 11 is used to spray a spray liquid (for example, a coolant such as a calcium chloride solution, ethylene glycol, etc.) to spray and cool the flue gas in the spray chamber, and the flue gas is stepped and cooled to a sub-zero temperature zone through each level of the spray chamber. For example, the spray assembly 11 is composed of a spray liquid delivery pipe and a plurality of nozzles provided on the pipe. The flue gas inlet of the adsorption tower 2 is connected to the smoke outlet 105 to deliver the cooled flue gas to the adsorption tower 2 for adsorption and purification into clean flue gas.

[0029] It should be understood that the inventors found that in the sub-zero temperature zone, the NO in the flue gas can undergo low-temperature oxidation adsorption on the surface of the adsorbent, and NO combines with O2 to be converted into NO2, thereby being adsorbed and fixed. At the same time, the SO2 adsorption capacity and purification efficiency are increased in magnitude under low-temperature environments, SO2 is mainly physically adsorbed, and the saturated adsorption sulfur capacity is greatly increased, achieving near-zero emissions of SO2 and NOx. In addition, since the present invention is a physical adsorption process, cooling can also significantly increase the adsorption of other pollutants such as SO3, Hg, VOCs and dust.

[0030] The multi-stage refrigeration device corresponds to the multi-stage spray chamber one by one. The spray chamber has a drain port, which is used to discharge the spray liquid in the spray chamber after heat exchange with the flue gas. The inlet of the refrigeration device is connected to the drain port of the corresponding spray chamber, and the outlet of the refrigeration device is connected to the inlet of the spray assembly 11 in the corresponding spray chamber. The spray liquid in the spray chamber after heat exchange with the flue gas is transported to the refrigeration device through the drain port. The refrigeration device recools the spray liquid and then transports it back to the spray assembly 11.

[0031] Optionally, the temperature of the spray liquid sprayed by the spray assembly 11 in the spray chamber from bottom to top is gradually reduced, that is, the refrigeration temperature of the refrigeration device corresponding to each level of spray chamber is also different, thereby achieving step-by-step cooling of the flue gas.

[0032] Therefore, in the flue gas spray cooling adsorption system of the embodiment of the present invention, the coal-fired flue gas enters the spray tower 1 through the smoke inlet 104, is cooled to the sub-zero temperature zone through the spray chambers of each level in turn, and the cooled flue gas is transported to the adsorption tower 2 through the smoke outlet 105, and is low-temperature adsorbed and purified into clean flue gas in the adsorption tower 2, thereby realizing integrated adsorption and removal of various pollutants such as SO2, NOx, SO3, Hg, HCl, HF, etc. in the flue gas, thereby improving the removal efficiency of various pollutants in the flue gas.

[0033] In some embodiments, Figure 1 As shown, a packing assembly 12 is further provided in the spray chamber, and the packing assembly 12 is located below the spray assembly 11 .

[0034] It can be understood that the spray liquid sprayed by the spray component 11 falls into the packing component 12, and the flue gas fully contacts the spray liquid in the packing component 12 for heat exchange, thereby improving the heat exchange effect.

[0035] Furthermore, if Figure 1 As shown, the packing density of the packing assembly 12 in the multi-stage spray chamber decreases from bottom to top, that is, the lower the heat exchange temperature, the smaller the packing density of the packing assembly 12 is required, thereby ensuring the heat exchange effect.

[0036] In some embodiments, Figure 1 As shown, the multi-stage spray chamber includes a first-stage spray chamber 101, a second-stage spray chamber 102, and a third-stage spray chamber 103 arranged in sequence from bottom to top. The multi-stage refrigeration device includes a first-stage refrigeration device 14 corresponding to the first-stage spray chamber 101, a second-stage refrigeration device 15 corresponding to the second-stage spray chamber 102, and a third-stage refrigeration device 16 corresponding to the third-stage spray chamber 103.

[0037] For example, the 100°C flue gas entering the spray tower 1 through the smoke inlet 104 is cooled to 30°C to 50°C in the first-stage spray chamber 101, cooled to 5°C to 25°C in the second-stage spray chamber 102, and cooled to -25°C to -15°C in the third-stage spray chamber 103. That is, the temperature of the spray liquid delivered to the spray assembly 11 in the first-stage spray chamber 101 by the first-stage cooling device is 20°C to 40°C, the temperature of the spray liquid delivered to the spray assembly 11 in the second-stage spray chamber 102 by the second-stage cooling device is 0°C to 15°C, and the temperature of the spray liquid delivered to the spray assembly 11 in the third-stage spray chamber 103 by the third-stage cooling device is -30°C to -20°C.

[0038] In some embodiments, Figure 1 As shown, a liquid collector 13 is provided at the bottom of the second-stage spray chamber 102 and the third-stage spray chamber 103. The liquid collector 13 has a liquid collecting tank and a vent (eg, an air lifting cap).

[0039] The liquid collecting tank in the second-stage spray chamber 102 is used to receive the spray liquid sprayed by the spray assembly 11 in the second-stage spray chamber 102, and the liquid collecting tank in the second-stage spray chamber 102 is connected to the liquid discharge port of the second-stage spray chamber 102. The vent in the second-stage spray chamber 102 is used to allow the smoke in the first-stage spray chamber 101 to flow into the second-stage spray chamber 102 and prevent the spray liquid in the second-stage spray chamber 102 from flowing into the first-stage spray chamber 101.

[0040] The liquid collecting tank in the third-level spray chamber 103 is used to receive the spray liquid sprayed by the spray assembly 11 in the third-level spray chamber 103, and the liquid collecting tank in the third-level spray chamber 103 is connected to the liquid discharge port of the third-level spray chamber 103. The vent in the third-level spray chamber 103 is used to allow the smoke in the second-level spray chamber 102 to flow into the third-level spray chamber 103 and prevent the spray liquid in the third-level spray chamber 103 from flowing into the second-level spray chamber 102.

[0041] It can be understood that the spray liquid sprayed by the spray component 11 in the first-stage spray chamber 101 falls to the bottom of the first-stage spray chamber 101, the spray liquid sprayed by the spray component 11 in the second-stage spray chamber 102 falls into the liquid collecting tank at the bottom of the second-stage spray chamber 102, and the spray liquid sprayed by the spray component 11 in the third-stage spray chamber 103 falls into the liquid collecting tank at the bottom of the third-stage spray chamber 103.

[0042] The smoke cooled in the first-stage spray chamber 101 flows into the second-stage spray chamber 102 through the ventilation part of the second-stage spray chamber 102 , and the smoke cooled in the second-stage spray chamber 102 flows into the third-stage spray chamber 103 through the ventilation part of the third-stage spray chamber 103 .

[0043] In some embodiments, Figure 1 As shown, the first-stage spray chamber 101 also has a liquid inlet 106, and the liquid inlet 106 of the first-stage spray chamber 101 is located above the liquid discharge port of the first-stage spray chamber 101. The liquid discharge port of the second-stage spray chamber 102 and the liquid discharge port of the third-stage spray chamber 103 are respectively connected to the liquid inlet 106 of the first-stage spray chamber 101 through pipelines, that is, the spray liquid in the liquid collection tank of the second-stage spray chamber 102 and the spray liquid in the liquid collection tank of the third-stage spray chamber 103 are respectively transported to the first-stage spray chamber 101 through pipelines.

[0044] The flue gas spray cooling adsorption system of the embodiment of the present invention also includes a circulation pump 17. The discharge port of the first-stage spray chamber 101 is connected to the inlet of the circulation pump 17 via a pipeline, and the outlet of the circulation pump 17 is connected to the inlet of the first-stage refrigeration device 14, the inlet of the second-stage refrigeration device 15 and the inlet of the third-stage refrigeration device 16 via a pipeline to form an overall spray liquid circulation loop.

[0045] It can be understood that the spray liquid in each spray chamber is collected at the bottom of the first spray chamber, and the spray liquid accumulated at the bottom of the first spray chamber is pumped to each refrigeration device for cooling by the circulating pump 17, and then sent to the spray assembly 11 in each spray chamber. Therefore, the flue gas spray cooling adsorption system of the embodiment of the present invention only uses one circulating pump 17 to transport the spray liquid to the spray assembly 11 in each spray chamber, thereby reducing the investment cost.

[0046] Furthermore, if Figure 1 As shown, the flue gas spray cooling adsorption system of the embodiment of the present invention also includes an MVR evaporator 18, the outlet of the circulating pump 17 is also connected to the inlet of the MVR evaporator 18 through a pipeline, and the outlet of the MVR evaporator 18 is connected to the inlet of the third-stage refrigeration device 16 through a pipeline.

[0047] After the flue gas is cooled, the moisture in the flue gas will condense and dissolve in the spray liquid, resulting in a decrease in the concentration of the spray liquid. The required cooling temperature in the third-stage spray chamber 103 is below zero. In order to avoid the spray liquid concentration being too low, resulting in a large number of ice crystals in the third-stage spray chamber 103, a bypass MVR evaporation device 18 is set to concentrate the spray liquid in the third-stage spray chamber 103, so that the high-concentration spray liquid is mixed into the spray liquid circulation loop to increase the overall concentration of the spray liquid.

[0048] In some embodiments, valve groups (not shown) are provided on the pipelines between the circulating pump 17 and the first-stage refrigeration device 14, the second-stage refrigeration device 15, the third-stage refrigeration device 16, and the MVR evaporation device 18. For example, the valve group includes control valves such as butterfly valves and check valves to control the flow and on-off of the pipelines.

[0049] In some embodiments, Figure 1 As shown, the bottom of the first spray chamber 101 also has a drain port 107. While cooling the flue gas, the spray liquid also removes most of the smoke dust in the flue gas, so that it is deposited at the bottom of the first spray chamber, and the silt at the bottom of the first spray chamber is discharged from the spray tower 1 through the drain port 107.

[0050] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0054] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0055] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A flue gas spray cooling adsorption system, characterized in that: include: A spray tower, wherein the spray tower has a plurality of spray chambers arranged in sequence along the vertical direction, the spray tower is provided with a smoke inlet connected to the spray chamber at the lowest level among the plurality of spray chambers and a smoke outlet connected to the spray chamber at the highest level among the plurality of spray chambers, a spray assembly is provided in the spray chamber, so that the smoke entering the spray tower through the smoke inlet is sprayed and cooled to a sub-zero temperature zone through the spray assemblies in the plurality of spray chambers in sequence, and the cooled smoke is discharged from the spray tower through the smoke outlet; An adsorption tower, wherein the flue gas inlet of the adsorption tower is connected to the flue gas outlet, so as to transport the cooled flue gas to the adsorption tower for adsorption and purification into clean flue gas; A multi-stage refrigeration device, wherein the multi-stage refrigeration device corresponds to the multi-stage spray chamber one by one, the spray chamber has a drain port, the inlet of the refrigeration device is connected to the corresponding drain port of the spray chamber, and the outlet of the refrigeration device is connected to the inlet of the spray assembly in the corresponding spray chamber, so that the spray liquid in the spray chamber after heat exchange with the flue gas is transported to the refrigeration device through the drain port for cooling and the cooled spray liquid is transported to the spray assembly.

2. The flue gas spray cooling adsorption system according to claim 1, characterized in that: A filling component is also provided in the spray chamber, and the filling component is located below the spray component.

3. The flue gas spray cooling adsorption system according to claim 2, characterized in that: The packing density of the packing components in the multi-stage spray chamber decreases successively from bottom to top.

4. The flue gas spray cooling adsorption system according to any one of claims 2 or 3, characterized in that: The multi-stage spray chamber includes a first-stage spray chamber, a second-stage spray chamber and a third-stage spray chamber arranged in sequence from bottom to top, and the multi-stage refrigeration device includes a first-stage refrigeration device corresponding to the first-stage spray chamber, a second-stage refrigeration device corresponding to the second-stage spray chamber and a third-stage refrigeration device corresponding to the third-stage spray chamber.

5. The flue gas spray cooling adsorption system according to claim 4, characterized in that: The bottom of the second-stage spray chamber and the third-stage spray chamber are both provided with a liquid collector, and the liquid collector has a liquid collecting tank and a vent; The liquid collecting tank in the second-stage spray chamber is used to receive the spray liquid sprayed by the spray assembly in the second-stage spray chamber, the liquid collecting tank in the second-stage spray chamber is connected with the liquid discharge port of the second-stage spray chamber, and the vent in the second-stage spray chamber is used to allow the smoke in the first-stage spray chamber to flow into the second-stage spray chamber and prevent the spray liquid in the second-stage spray chamber from flowing into the first-stage spray chamber; The liquid collecting tank in the third-level spray chamber is used to receive the spray liquid sprayed by the spray assembly in the third-level spray chamber, the liquid collecting tank in the third-level spray chamber is connected to the discharge port of the third-level spray chamber, and the ventilation part in the third-level spray chamber is used to allow the smoke in the second-level spray chamber to flow into the third-level spray chamber and prevent the spray liquid in the third-level spray chamber from flowing into the second-level spray chamber.

6. The flue gas spray cooling adsorption system according to claim 5, characterized in that: The first-stage spray chamber also has a liquid inlet, and the liquid discharge port of the second-stage spray chamber and the liquid discharge port of the third-stage spray chamber are respectively connected to the liquid inlet of the first-stage spray chamber through pipelines; The flue gas spray cooling adsorption system also includes a circulation pump, the discharge port of the first-stage spray chamber is connected to the inlet of the circulation pump via a pipeline, and the outlet of the circulation pump is connected to the inlet of the first-stage refrigeration device, the inlet of the second-stage refrigeration device and the inlet of the third-stage refrigeration device via a pipeline.

7. The flue gas spray cooling adsorption system according to claim 6, characterized in that: The liquid inlet of the first-stage spray chamber is located above the liquid outlet of the first-stage spray chamber.

8. The flue gas spray cooling adsorption system according to claim 6, characterized in that: It also includes an MVR evaporation device, the outlet of the circulation pump is also connected to the inlet of the MVR evaporation device through a pipeline, and the outlet of the MVR evaporation device is connected to the inlet of the third-stage refrigeration device through a pipeline.

9. The flue gas spray cooling adsorption system according to claim 8, characterized in that: A valve group is provided on the pipelines between the circulation pump and the first-stage refrigeration device, the second-stage refrigeration device, the third-stage refrigeration device and the MVR evaporation device.

10. The flue gas spray cooling adsorption system according to claim 4, characterized in that: The bottom of the first-stage spray chamber is also provided with a sewage outlet.

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