A device for collecting carbon-containing waste from thermal power plants to make filling materials

Abstract

The present invention discloses a device for collecting carbon-containing waste from thermal power plants to make filling materials. The lower part and bottom surface of the pre-bin are respectively connected with the carbon sealing material making bin, a third feeding pipe is provided at one end of the drainage pipe close to the carbon sealing material making bin, the bottom surface of the pre-bin is connected with the carbon sealing material making bin through the carbon exhaust pipe, and a pH value monitor and a first liquid valve are arranged at intervals on the drainage pipe; an exhaust pipe is provided at the top of the pre-bin, and a liquid inlet pipe and a circulating liquid adsorption pipe are provided at the upper and middle parts of the side of the pre-bin, respectively, one end of the liquid inlet pipe is connected with the pre-bin, one end of the circulating liquid adsorption pipe is connected with the pre-bin, and the other end is connected with the drainage pipe; an air inlet pipe is provided at the lower part of the side of the pre-bin, and the exhaust pipe is connected with the air inlet pipe; a first feeding pipe and a second feeding pipe are provided at the upper part of the carbon sealing material making bin. The present invention directly introduces the carbon-containing waste from the power plant into it as the raw material for producing the filling material, and the cost is reduced by using local materials. The prepared filling material is filled underground to avoid its escape into the air, causing the greenhouse effect and polluting the environment.

Description

Technical Field

[0001] The invention relates to a device for making a filling material, in particular to a device for collecting carbonaceous waste from a thermal power plant to make the filling material. Background Art

[0002] In 2022, my country's cumulative power generation will be 838.863 billion kWh, of which thermal power generation accounts for 69.77% of the total power generation. Coal-fired power plants consume a large amount of coal resources during operation, while emitting waste gas containing a large amount of carbon dioxide, and produce a large amount of high-carbon-based solid waste such as fly ash, slag and desulfurization gypsum. At present, my country's main methods of dealing with these solid wastes are stacking and landfilling. These methods occupy a lot of land, are costly, and are prone to secondary pollution. Therefore, there is an urgent need for a method that can stably seal high-carbon-based solid waste and waste gas mainly composed of carbon dioxide from power plants.

[0003] In addition, the filling technology in the mining process, the backfill of building foundations and the backfill of road subgrades all require the consumption of a large amount of solid materials, but the above technologies often have the significant problem of high material production costs. Therefore, the mining and infrastructure fields are also seeking low-cost filling and backfilling methods. The high-carbon-based solid waste of power plants can be used as filling and backfilling materials. At present, there is a need for equipment that can absorb carbon dioxide gas and use high-carbon-based solid waste as aggregate to make filling materials, so as to achieve effective sealing of high-carbon-based solid waste and waste gas from power plants. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the present invention provides a device for collecting carbon-containing waste from thermal power plants to make filling materials. The device can directly collect carbon-containing waste such as high-carbon-based solid waste and exhaust gas from power plants for making filling materials, thereby greatly reducing the production cost of filling materials and effectively utilizing carbon-containing waste from power plants.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for collecting carbon-containing waste from a thermal power plant to make filling materials, comprising a front bin and a carbon sealing and material making bin, the lower side of the front bin is connected to the carbon sealing and material making bin through a drainage pipe, a third material delivery pipe is provided at one end of the drainage pipe close to the carbon sealing and material making bin, the bottom surface of the front bin is connected to the carbon sealing and material making bin through a carbon discharge pipe, a pH value monitor and a first liquid valve are arranged at intervals on the drainage pipe, and the pH value monitor is close to the front bin;

[0006] An exhaust pipe is provided at the top of the front bin, and a carbon dioxide monitor and a first gas valve are arranged in the exhaust pipe from bottom to top. A liquid inlet pipe and a circulating liquid adsorption pipe are respectively provided at the upper and middle parts of the side of the front bin. One end of the liquid inlet pipe is connected with the front bin, one end of the circulating liquid adsorption pipe is connected with the front bin, and the other end is connected with the drain pipe and the connection point is located between the pH monitor and the first liquid valve. A second liquid valve is provided on the circulating liquid adsorption pipe;

[0007] An air intake pipe is provided at the lower part of the side of the front bin, and the exhaust pipe is connected to the air intake pipe through a gas circulation adsorption pipe. The connecting point between the gas circulation adsorption pipe and the exhaust pipe is located between the carbon dioxide monitor and the first gas valve, and a second gas valve is provided on the gas circulation adsorption pipe; a first material delivery pipe and a second material delivery pipe are provided on the upper part of the carbon sealing material bin.

[0008] Furthermore, one end of the liquid inlet pipe connected to the forward bin extends to the interior of the forward bin and spray ports are evenly spaced apart on the liquid inlet pipe located inside the forward bin.

[0009] Furthermore, one end of the circulating liquid adsorption pipe connected to the forward bin extends into the forward bin and spray ports are evenly spaced apart on the circulating liquid adsorption pipe located inside the forward bin.

[0010] Furthermore, the height of the position where the air intake pipe is connected to the front compartment is higher than the height of the position where the drain pipe is connected to the front compartment.

[0011] Compared with the prior art, the present invention can directly introduce carbon-containing waste from power plants as raw materials for producing filling materials used in mines or infrastructure fields. Local materials do not need to be transported to reduce costs, while eliminating the procedure of stacking and landfilling solid waste, and will not occupy a large amount of land to cause secondary pollution. The filling materials made from carbon-containing waste from power plants absorb carbon dioxide, and the filling materials are filled underground. Therefore, the carbon dioxide will also be more firmly sealed underground, preventing it from escaping into the air, causing a greenhouse effect and polluting the environment, thereby achieving effective sealing of high-carbon-based solid waste and exhaust gas from power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention;

[0013] In the figure: 0, front warehouse, 1, air inlet pipe, 2, liquid inlet pipe, 3, sprinkler head, 4, carbon dioxide monitor, 5-1, first gas valve, 5-2, second gas valve, 6, exhaust pipe, 7, gas circulation adsorption tube, 8, pH value monitor, 9-1, first liquid valve, 9-2, second liquid valve, 10, drain pipe, 11, circulating liquid adsorption tube, 12, carbon exhaust pipe, 13, high carbon-based slurry, 14, carbon sealing silo, 15, first feed pipe, 16, second feed pipe, 17, third feed pipe, 18, filling material. Implementation

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] like Figure 1 As shown, the present invention provides a technical solution: it includes a forward bin 0 and a carbon sealing and material making bin 14, the lower side of the forward bin 0 is connected with the carbon sealing and material making bin 14 through a drainage pipe 10, and a third feed pipe 17 is provided at one end of the drainage pipe 10 close to the carbon sealing and material making bin 14, the bottom surface of the forward bin 0 is connected with the carbon sealing and material making bin 14 through a carbon discharge pipe 12, a pH value monitor 8 and a first liquid valve 9-1 are arranged on the drainage pipe 10 at intervals, the pH value monitor 8 is close to the forward bin 0, the drainage port 10 is used to output excess water after adsorbing carbon dioxide and smoke, and the carbon discharge port 12 is used to output high-carbon-based slurry 13 formed after adsorbing carbon dioxide and smoke; an exhaust pipe 6 is provided at the top of the forward bin 0, and a carbon dioxide monitor 4 and a first gas valve 5-1 are arranged at intervals from bottom to top in the exhaust pipe 6, and the exhaust pipe 6 is used to discharge the gas after adsorbing carbon dioxide and smoke, and a liquid inlet pipe 2 and a circulating liquid are respectively provided at the upper and middle parts of the side of the forward bin 0. An adsorption tube 11 and a liquid inlet pipe 2 are used for injecting adsorption solution, one end of the liquid inlet pipe 2 is connected to the forward bin 0, one end of the circulating liquid adsorption tube 11 is connected to the forward bin 0, and the other end is connected to the drain pipe 10 and the connecting point is located between the pH value monitor 8 and the first liquid valve 9-1, and a second liquid valve 9-2 is provided on the circulating liquid adsorption tube 11; an air inlet pipe 1 is provided at the lower part of the side of the forward bin 0, and the air inlet pipe 1 is used to feed the waste gas generated by the power plant, and the height of the connecting position of the air inlet pipe 1 and the forward bin 0 is higher than the height of the connecting position of the drain pipe 10 and the forward bin 0, the exhaust pipe 6 is connected to the air inlet pipe 1 through a gas circulation adsorption tube 7, and the connecting point of the gas circulation adsorption tube 7 and the exhaust pipe 6 is located between the carbon dioxide monitor 4 and the first gas valve 5-1, and a second gas valve 5-2 is provided on the gas circulation adsorption tube 7; a first feed pipe 15 and a second feed pipe 16 are provided on the upper part of the carbon sealing material bin 14.

[0017] The exhaust gas generated by the power plant is sent into the forward bin 0 from the bottom through the air inlet pipe 1 for adsorption of carbon dioxide and smoke particles. The adsorption process uses an adsorption solution, which is injected into the forward bin 0 from the top through the liquid inlet pipe 2. One end of the liquid inlet pipe 2 connected to the forward bin 0 extends to the interior of the forward bin 0 and spray ports 3 are evenly spaced on the liquid inlet pipe 2 located inside the forward bin 0. The exhaust gas is evenly sprayed in the forward bin 0 through the spray ports 3. During the descent of the adsorption solution, it is fully mixed with the exhaust gas moving upward from the bottom to achieve full adsorption of carbon dioxide and smoke particles.

[0018] The adsorbed gas continues to move upward until it reaches the upper end of the forward bin 0, and the carbon dioxide monitor 4 detects the concentration of the adsorbed gas in real time. When the concentrations of carbon dioxide and smoke particles detected by the carbon dioxide monitor 4 have not reached the emission standard, the first gas valve 5-1 is controlled to be in a closed state, and the second gas valve 5-2 is controlled to be in an open state. The substandard gas is sent to the bottom of the forward bin 0 again through the circulating adsorption tube 7 for secondary adsorption. When the concentrations of carbon dioxide and smoke particles detected by the carbon dioxide monitor 4 reach the emission standard, the second gas valve 5-2 is controlled to be in a closed state, and the first gas valve 5-1 is controlled to be in an open state, and the qualified gas is discharged into the atmosphere through the exhaust pipe 6; the carbon dioxide monitor 4 detects the concentration of the adsorbed gas in real time, and adjusts the opening and closing of the first gas valve 5-1 and the second gas valve 5-2 accordingly according to the detection results.

[0019] The initial concentration of the adsorption solution is relatively high. During one adsorption process, the effective utilization rate of the adsorption solution is less than 100%. Therefore, the pH monitor 8 is used to test the pH value of the adsorption solution sprayed to the bottom of the forward bin 0. When the pH monitor 8 detects that the adsorption solution is still alkaline, the first liquid valve 9-1 is controlled to be in a closed state, and the second liquid valve 9-2 is controlled to be in an open state, and the adsorption solution is pumped into the circulating liquid adsorption pipe 11 for secondary adsorption. One end of the circulating liquid adsorption pipe 11 connected to the forward bin 0 extends to the interior of the forward bin 0 and spray ports are evenly spaced on the circulating liquid adsorption pipe 11 located inside the forward bin 0. The secondary adsorption solution is evenly sprayed in the forward bin 0 through the spray ports to achieve sufficient adsorption of carbon dioxide and smoke particles in the exhaust gas. When the pH monitor 8 detects that the pH value of the adsorption solution reaches neutral, the second liquid valve 9-2 is controlled to be in a closed state, and the first liquid valve 9-1 is controlled to be in an open state, so that the adsorption solution is injected into the carbon sealing silo 14 through the drain pipe 10.

[0020] Through the cyclic adsorption of the exhaust gas from the power plant by the adsorption solution, the particles in the exhaust gas are adsorbed by the adsorption solution, and at the same time, the carbon dioxide reacts chemically with the alkaline components in the adsorption solution to form a high-carbon-based slurry 13; thus, the purpose of converting carbon dioxide from gas to solid is achieved for easy storage. After the high-carbon-based slurry 13 precipitated at the bottom of the front bin 0 accumulates to a certain volume, it is input into the carbon sealing material bin 14 through the carbon discharge port 12 for preparing the paste.

[0021] A certain amount of aqueous solution and high carbon-based slurry 13 are respectively input into the carbon sealing material storage bin 14 from the drainage pipe 10 and the carbon discharge port 12. These two substances are two raw materials for making filling paste. However, on the one hand, the quantity of these two raw materials is relatively small, and on the other hand, the variety of materials is insufficient. Therefore, other materials need to be added to meet the conditions for making the paste. Solid wastes such as desulfurized gypsum, waste residue and carbon dioxide adsorbent are respectively input from the first feed pipe 15 as aggregates for making the paste. These solid waste aggregates have been crushed to a reasonable size before input; fly ash or cement is input from the second feed pipe 16 as a binder to improve the strength of the paste; water is input from the third feed pipe 17 to supplement the water volume lacking in the paste production. The mass ratio of solid materials such as desulfurized gypsum, waste residue, carbon dioxide adsorbent, fly ash or cement to water should be greater than 3:1; after all materials enter the carbon sealing material silo 14, they are mixed and continuously stirred in the silo to fully mix the materials to form a uniform paste or slurry filling material 18 for sealing carbon dioxide; the filling material 18 can be used for filling the goaf of underground mines or the sidewall mining of open-pit mines. After the filling material 18 solidifies, the carbon dioxide adsorbed by it will be more firmly sealed underground, preventing it from escaping into the air, causing a greenhouse effect and polluting the environment.

[0022] The compressive strength of the prepared filling material after curing for 28 days E Should satisfy E≥ s ,in s = H ` c , H Refers to the thickness of the overlying rock layer above the filling material 18, ` c Refers to the average bulk density of the overlying rock layer of the filling material 18; by adjusting the proportion of the binder, the compressive strength E of the filling material 18 can be adjusted to meet the filling needs of goafs and mining tunnels with different burial depths and geological conditions.

[0023] 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 the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any slight modification, equivalent substitution and improvement made to the above embodiment based on the technical essence of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. A device for collecting carbonaceous waste from thermal power plants to make filling materials, characterized in that: The invention comprises a pre-bin (0) and a carbon sealing and material making bin (14); the lower side of the pre-bin (0) is connected to the carbon sealing and material making bin (14) via a drainage pipe (10); a third material delivery pipe (17) is provided at one end of the drainage pipe (10) close to the carbon sealing and material making bin (14); the bottom surface of the pre-bin (0) is connected to the carbon sealing and material making bin (14) via a carbon discharge pipe (12); a pH value monitor (8) and a first liquid valve (9-1) are arranged at intervals on the drainage pipe (10); and the pH value monitor (8) is close to the pre-bin (0); An exhaust pipe (6) is provided at the top of the front bin (0), a carbon dioxide monitor (4) and a first gas valve (5-1) are arranged in intervals from bottom to top in the exhaust pipe (6), a liquid inlet pipe (2) and a circulating liquid adsorption pipe (11) are respectively provided at the upper part and the middle part of the side of the front bin (0), one end of the liquid inlet pipe (2) is connected to the front bin (0), one end of the circulating liquid adsorption pipe (11) is connected to the front bin (0), and the other end is connected to the drain pipe (10), and the connection point is located between the pH monitor (8) and the first liquid valve (9-1), and a second liquid valve (9-2) is provided on the circulating liquid adsorption pipe (11); An air intake pipe (1) is provided at the lower part of the side of the front compartment (0); the exhaust pipe (6) is connected to the air intake pipe (1) via a gas circulation adsorption pipe (7); the connection point between the gas circulation adsorption pipe (7) and the exhaust pipe (6) is located between the carbon dioxide monitor (4) and the first gas valve (5-1); and a second gas valve (5-2) is provided on the gas circulation adsorption pipe (7); A first material delivery pipe (15) and a second material delivery pipe (16) are provided on the upper part of the carbon sealing material making bin (14).

2. The device for collecting carbonaceous waste from thermal power plants to make filling materials according to claim 1, characterized in that: One end of the liquid inlet pipe (2) connected to the front bin (0) extends into the interior of the front bin (0), and spray ports (3) are evenly spaced apart on the liquid inlet pipe (2) located inside the front bin (0).

3. The device for collecting carbonaceous waste from thermal power plants to make filling materials according to claim 1, characterized in that: One end of the circulating liquid adsorption pipe (11) connected to the forward bin (0) extends into the interior of the forward bin (0), and spray ports are evenly spaced apart on the circulating liquid adsorption pipe (11) located inside the forward bin (0).

4. The device for collecting carbonaceous waste from thermal power plants to make filling materials according to claim 1, characterized in that: The height of the position where the air intake pipe (1) is connected to the front chamber (0) is higher than the height of the position where the drainage pipe (10) is connected to the front chamber (0).

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