Mineralization reactor for directly mineralizing and utilizing flue gas

Abstract

The utility model discloses a mineralization reactor for directly mineralizing and utilizing flue gas. Comprising a curing kettle; the curing kettle comprises a flue gas inlet section, a curing section and a flue gas outlet section; a maintenance vehicle which is consistent with the maintenance kettle in shape and is used for loading mineralized aggregate is movably arranged in the maintenance section; the outer wall of the maintenance vehicle is in sliding fit with the inner wall of the maintenance kettle; a gap communicated with the flue gas inlet section and the flue gas outlet section is formed between the maintenance vehicle and the maintenance kettle, so that flue gas of the flue gas inlet section enters the maintenance vehicle and then is discharged from the flue gas outlet section. According to the device, the space utilization rate of the curing kettle can be remarkably increased, meanwhile, flue gas can pass through the aggregate bed layer from top to bottom, the large contact area between aggregate and the flue gas in the horizontal direction can be achieved, the resistance drop of the flue gas passing through the aggregate bed layer is effectively reduced, the pressure drop of the aggregate bed layer is smaller than or equal to 0.1 kpa / m, and the service life of the curing kettle is prolonged. By adopting the conventional flue gas fan, the flue gas conveying requirement can be met, and the energy consumption is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste gas mineralization, and in particular relates to a mineralization reactor for directly mineralizing and utilizing flue gas. Background Art

[0002] Flue gas mineralization curing is a new type of building material curing method, and the selection of flue gas curing equipment is directly related to the curing effect. At present, flue gas mineralization curing is mostly carried out by pressurization operation. The pressurized flue gas is passed into the curing kettle, and the air intake is stopped when the pressure reaches the set value. After sufficient curing, the exhaust gas is discharged into other curing kettles to be cured.

[0003] At the same time, in order to improve the pressure resistance of the container, the curing kettle mostly adopts a horizontal cylindrical structure, and is equipped with a conveying track and a movable curing vehicle to facilitate the continuity of the curing operation. However, there are many problems with the curing equipment. First, the flue gas is pressurized to increase the cost of pressure utilization; second, during the curing process, the gas in the curing kettle is basically static, and the curing process mainly relies on the concentration gradient difference of CO2 and is carried out through the diffusion process. Third, the curing kettle adopts a cylindrical structure, while the curing vehicle adopts a tray-type structure, resulting in a large gap area on both sides of the curing kettle, and the volume utilization rate is low. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the utility model provides a mineralization reactor for direct mineralization utilization of flue gas, which can effectively solve the problem of low utilization rate of flue gas in the existing mineralization device.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] Provided is a mineralization reactor for direct mineralization of flue gas, comprising a curing kettle; the curing kettle comprises a flue gas inlet section, a curing section and a flue gas outlet section; a curing vehicle having the same shape as the curing kettle and used for loading mineralized aggregate is movably arranged in the curing section; and the outer wall of the curing vehicle is slidably fitted with the inner wall of the curing kettle;

[0007] There is a gap between the curing car and the curing kettle, which is connected with the smoke inlet section and the smoke outlet section, so that the smoke from the smoke inlet section enters the curing car and is then discharged from the smoke outlet section.

[0008] Preferably, the smoke inlet section is provided with a smoke inlet and an inlet baffle located at the bottom of the curing kettle; the inlet baffle is fitted with the outer wall of the curing kettle to form an inlet channel with the smoke inlet;

[0009] The smoke outlet section is provided with a smoke outlet and a smoke outlet baffle; the smoke outlet baffle is located between the top of the curing vehicle and the curing kettle. After the smoke enters the curing vehicle, it is cut off by the smoke outlet baffle, passes through the aggregate bed from top to bottom, and is then discharged from the smoke outlet.

[0010] Preferably, the height of the air inlet baffle is smaller than the height of the curing kettle and larger than the height of the curing vehicle.

[0011] Preferably, a sealing structure for preventing air leakage is provided in the maintenance section; the sealing structure comprises at least one annular inflatable sealing ring which fits tightly with the maintenance vehicle, the air outlet baffle and the air inlet baffle after being inflated.

[0012] Preferably, a sealing cavity located at the same horizontal plane is opened on the curing kettle, the air inlet baffle and the air outlet baffle, and an inflatable sealing ring is embedded therein, which fits tightly with the sealing surface of the outer wall of the curing vehicle after inflation.

[0013] Preferably, the smoke inlet section is also provided with a water spray atomization nozzle and a gas heater located in the air inlet passage, and the gas heater is a tube-in-tube heater.

[0014] Preferably, the top of the maintenance vehicle is an open structure, the side walls are connected by plates with thermal insulation effect, and the bottom is composed of grille plates and wire mesh.

[0015] Preferably, the maintenance vehicle is a box-type structure.

[0016] Preferably, a gas distributor for adjusting the flue gas distribution is provided between the top of the curing vehicle and the curing kettle; the gas distributor is a plate-like structure with a plurality of through holes formed thereon; the number of through holes increases in the direction away from the flue gas inlet section.

[0017] Preferably, the bottom of the curing vehicle is provided with rollers, and the bottom of the curing kettle is provided with tracks matching with the rollers.

[0018] Preferably, a plurality of temperature and humidity sensor interfaces are provided on the curing kettle for detecting the temperature and humidity of the flue gas.

[0019] Preferably, the outer wall of the maintenance vehicle is provided with a plurality of reinforcing ribs.

[0020] Preferably, a condensate collection tank located at the bottom of the curing kettle is also provided in the flue gas outlet section.

[0021] The beneficial effects of the utility model are:

[0022] 1. In the present application, the curing kettle and the curing kettle have the same appearance, and are preferably of a box-type structure, which can maximize the space utilization of the curing kettle. At the same time, the aggregate filling height can be reduced by adjusting the length and width while ensuring the filling volume. For the situation where the aggregate strength is low in the initial stage of curing, the filling height is generally controlled within the range of 1-3 meters, which reduces the requirements for the initial strength of the aggregate and can meet the filling height requirements for direct flue gas curing of fresh aggregates; at the same time, due to the low filling height, the uniform temperature distribution of the aggregates and the flue gas CO2 concentration distribution in the vertical direction of the curing vehicle can be ensured, which is conducive to ensuring the uniform curing effect of aggregates in different areas during the curing period.

[0023] 2. The gas heater can prevent the flue gas from condensing due to heat loss during the flow process, which affects the curing effect; at the same time, the structural design allows the flue gas to pass through the aggregate bed from top to bottom, which can achieve a larger contact area between the aggregate and the flue gas in the horizontal direction, effectively reducing the resistance drop of the flue gas passing through the aggregate bed. The pressure drop of the aggregate bed is ≤0.1kpa / m. The use of conventional flue gas fans can meet the flue gas transportation requirements and save energy. In the early stage of curing, the condensed water generated by the contact between the flue gas and the low-temperature aggregate is enriched in the bottom area of ​​the curing kettle with the flow of the flue gas, and then collected by the collection tank set at the bottom of the flue gas outlet area.

[0024] 3. This application can realize the flue gas passing through the aggregate bed from top to bottom, ensuring the effective contact between the flue gas and the aggregate, and realizing the automatic separation of the flue gas and condensed water during the curing process. At the same time, the flue gas passes through the aggregate bed as a mobile phase. Compared with the closed curing after the flue gas is pressurized, the heat and mass transfer between the flue gas and the aggregate belongs to forced convection transfer, and the heat and mass transfer efficiency is higher.

[0025] 4. This application adjusts the number of through holes in different areas of the gas distributor so that the flue gas has better gas distribution in different areas, ensuring the contact effect between the flue gas and the aggregate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the device;

[0027] Figure 2 This is a schematic diagram of the maintenance vehicle structure;

[0028] Figure 3 Schematic diagram of the gas distributor structure;

[0029] Figure 4 This is the diagram of the sealing ring being inflated;

[0030] Figure 5 This is the diagram of the sealing ring deflation state;

[0031] Figure 6 Schematic diagram of flue gas flow during the maintenance process.

[0032] Among them, 1. curing kettle; 2. condensate collection tank; 3. curing vehicle; 4. track; 5. air inlet baffle; 6. flue gas inlet; 7. water spray atomization nozzle; 8. gas heater; 9. temperature and humidity sensor interface; 10. gas distributor; 11. air outlet baffle; 12. flue gas outlet; 13. inflatable sealing ring; 14. through hole; 15. roller; 16. support; 17. reinforcing rib; 18. sealing surface. DETAILED DESCRIPTION

[0033] The specific implementation methods of the utility model are described below to facilitate technical personnel in this technical field to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.

[0034] like Figure 1 and 2 As shown, the mineralization reactor capable of directly mineralizing and utilizing flue gas includes a curing kettle 1, which is a horizontal structure and is divided into a flue gas inlet section, a curing section and a flue gas outlet section. The curing section is located between the flue gas inlet section and the flue gas outlet section, and mainly includes a curing vehicle 3.

[0035] There are gaps between the bottom and top of the curing vehicle 3 and the curing kettle 1, wherein a plurality of rollers 15 are arranged at the bottom of the curing vehicle 3, and a track 4 is arranged at the bottom of the curing kettle 1. The sliding cooperation between the rollers 15 and the track 4 enables the curing vehicle 3 to enter and exit the curing kettle 1.

[0036] Furthermore, in order to improve the space utilization of the curing kettle 1 , the curing kettle 1 and the curing vehicle 3 are kept in the same shape, and preferably both are box-type structures and are slidably fitted with the inner wall of the curing kettle 1 .

[0037] like Figure 2 As shown, the curing vehicle 3 is a box-type structure with an open top, which is used to load aggregates to be mineralized. Its side walls are connected by plates with heat-insulating effect, and the bottom is composed of grid plates and wire mesh, so that the smoke can flow through the curing vehicle 3 from top to bottom. In addition, reinforcing ribs 17 are provided on the outer wall of the curing vehicle 3 to improve the strength and stability of the curing vehicle 3.

[0038] like Figure 1 As shown, the smoke inlet section is provided with a smoke inlet 6 and a water spray atomization nozzle 7 for humidifying the smoke. There is also an air inlet baffle 5, according to the present application Figure 1As shown, the air inlet baffle 5 is fixed to the bottom of the curing kettle 1 and fits the outer wall of the curing vehicle 3. Its height is greater than or equal to the height of the curing vehicle 3, so that the smoke can only enter the curing vehicle 3 from top to bottom ( Figure 6 ) to prevent smoke from entering or flowing through the maintenance vehicle from other directions 3.

[0039] An air inlet passage is formed between the air inlet baffle 5 and the side wall of the curing kettle 1 having the fume inlet 5, and a gas heater 8 is arranged in the air inlet passage.

[0040] At the same time, an exhaust baffle 11 is arranged between the top of the curing vehicle 3 and the curing kettle 1 at the exhaust section of the flue gas, and the exhaust baffle 11 is used to block the flue gas to prevent the flue gas from being discharged directly through the flue gas outlet 12 opened in the exhaust section of the flue gas without passing through the curing vehicle 3.

[0041] like Figure 1 and Figure 3 As shown, a gas distributor 10 is also provided in the curing section. The gas distributor 10 is a plate-like structure with a plurality of through holes 14, which is located between the top of the curing vehicle 3 and the curing kettle 1. The number of through holes 14 distributed per unit area is adjusted according to the distance from the air inlet direction. Close to the air inlet end side, due to the small gas resistance, the number of through holes 14 per unit area is small, and far away from the air inlet end side, due to the long gas flow distance, the number of through holes 14 per unit area is large, thereby achieving uniform distribution of gas flow in different areas.

[0042] At the same time, in order to ensure that the flue gas entering the flue gas inlet section can only be regulated by the gas distributor 10 to enter the curing vehicle 3, the side edges of the gas distributor 10 are fixedly connected to the air inlet baffle 5, the air outlet baffle 11 and the inner wall of the curing kettle 1 to prevent the flue gas from entering the curing vehicle 3 or the flue gas outlet section without passing through the gas distributor 10.

[0043] like Figure 1 , Figure 4 and Figure 5 As shown, an annular sealing structure is also designed between the curing car 3 and the curing kettle 1, which is composed of a sealing cavity and an inflatable sealing ring 13 in the sealing cavity. The sealing cavity is opened at the same horizontal position of the curing kettle 1, the air outlet baffle 11 and the air inlet baffle 5 to form an annular structure. The inflatable sealing ring 13 adopts a one-stage or multi-stage structure to achieve effective isolation and sealing between the curing kettle 1 box and the sealing surface 18 of the curing car 3 in the inflated state, ensuring effective control of the direction of the flue gas flow. By inflating and deflating the inflatable sealing ring 13, the inflatable sealing ring 13 and the sealing surface 18 of the curing car 3 are compressed and relaxed, thereby realizing the connection and separation of the curing car 3 and the curing kettle 1, which is convenient for aggregate curing in the curing car 3 and moving in and out of the curing kettle 1.

[0044] like Figure 1As shown, a plurality of temperature and humidity sensor interfaces 9 are also provided on the curing kettle 1, so as to detect the flue gas concentration, temperature, humidity, etc. in each area of ​​the curing kettle 1. In addition, a condensate collecting tank 2 is also provided at the bottom of the curing kettle 1 at the flue gas outlet section. The condensate is enriched in the bottom area of ​​the curing kettle 1 along with the flow of the flue gas, and then collected by the condensate collecting tank 2.

[0045] The specific implementation method is described in detail, but it should not be understood as limiting the protection scope of this patent. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the protection scope of this patent.

Claims

1. A mineralization reactor for direct mineralization of flue gas, characterized in that: It includes a curing kettle; the curing kettle includes a flue gas inlet section, a curing section and a flue gas outlet section; a curing vehicle having the same shape as the curing kettle and used for loading mineralized aggregate is movably arranged in the curing section; A gap connected to the smoke inlet section and the smoke outlet section is provided between the curing vehicle and the curing kettle, so that smoke from the smoke inlet section enters the curing vehicle and is then discharged from the smoke outlet section.

2. The mineralization reactor for direct mineralization of flue gas according to claim 1, characterized in that: The smoke inlet section is provided with a smoke inlet and an air inlet baffle located at the bottom of the curing kettle; the air inlet baffle is in contact with the outer wall of the curing kettle to form an air inlet channel with the smoke inlet; The smoke outlet section is provided with a smoke outlet and a smoke outlet baffle; the smoke outlet baffle is located between the top of the curing vehicle and the curing kettle. After the smoke enters the curing vehicle, it is blocked by the smoke outlet baffle, passes through the aggregate bed from top to bottom, and then is discharged from the smoke outlet.

3. The mineralization reactor for direct mineralization of flue gas according to claim 2, characterized in that: The height of the air intake baffle is smaller than the height of the curing kettle and larger than the height of the curing vehicle.

4. The mineralization reactor for direct mineralization of flue gas according to claim 1 or 2, characterized in that: A sealing structure for preventing air leakage is arranged in the maintenance section; the sealing structure comprises at least one annular inflatable sealing ring, which fits tightly with the maintenance vehicle, the air outlet baffle and the air inlet baffle after being inflated.

5. The mineralization reactor for direct mineralization of flue gas according to claim 2, characterized in that: The smoke inlet section is also provided with a water spray atomization nozzle and a gas heater located in the air inlet channel.

6. The mineralization reactor for direct mineralization of flue gas according to claim 1 or 2, characterized in that: The top of the maintenance vehicle is an open structure, the side walls are connected by plates with heat-insulating effect, and the bottom is composed of grille plates and wire mesh.

7. The mineralization reactor for direct mineralization of flue gas according to claim 6, characterized in that: A gas distributor for adjusting the distribution of flue gas is arranged between the top of the curing vehicle and the curing kettle; the gas distributor is a plate-like structure with a plurality of through holes formed thereon; the number of the through holes increases in a direction away from the flue gas inlet section.

8. The mineralization reactor for direct mineralization of flue gas according to claim 1, characterized in that: The bottom of the curing vehicle is provided with rollers, and the bottom of the curing kettle is provided with tracks matching with the rollers.

9. The mineralization reactor for direct mineralization of flue gas according to claim 1, characterized in that: The curing kettle is provided with a plurality of temperature and humidity sensor interfaces for detecting the temperature and humidity of the flue gas.

10. The mineralization reactor for direct mineralization and utilization of flue gas according to claim 1, characterized in that: The flue gas outlet section is provided with a condensed water collecting tank located at the bottom of the curing kettle.

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