Low-grade limestone dephosphorization and desulfurization calcination flue gas treatment process

Abstract

The invention discloses a low-grade limestone dephosphorization and desulfurization calcination flue gas treatment process which comprises the following steps: A, conveying flue gas into a flue gas treatment mechanism, and putting limestone and water into a limestone treatment mechanism; b, the content of oxygen in a flue gas treatment mechanism is increased under the cooperation of an air blowing mechanism, dephosphorization and desulfurization treatment is conducted on flue gas under the cooperation of a limestone mixed liquid spraying mechanism, the flue gas treatment mechanism comprises an absorption tower, the lower end of the left side of the absorption tower communicates with a gas inlet pipe, and a first discharging port is formed in the middle end of the bottom of the absorption tower; a material blocking plate is inserted into the inner surface of the first discharging opening, and first supporting legs are fixedly connected to the periphery of the bottom of the absorption tower. Limestone and water are used as raw materials, and flue gas in the flue gas treatment mechanism is subjected to efficient dephosphorization and desulfurization treatment through cooperation of the air blowing mechanism and the limestone mixed liquid spraying mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas treatment, in particular to a low-grade limestone dephosphorization, desulfurization and calcination flue gas treatment process. Background Art

[0002] Flue gas treatment refers to the purification of flue gas generated in the industrial production process to reduce pollution to the environment. The main purpose of flue gas treatment is to remove harmful substances in the flue gas, such as particulate matter, sulfur dioxide and nitrogen oxides, so as to meet emission standards and protect the environment and human health. However, the existing flue gas treatment process has poor effects on flue gas dephosphorization and desulfurization, which brings inconvenience to people's use. Summary of the invention

[0003] The object of the present invention is to provide a low-grade limestone dephosphorization and desulfurization calcination flue gas treatment process to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a low-grade limestone dephosphorization and desulfurization calcination flue gas treatment process, comprising the following steps: A. Transporting flue gas to a flue gas treatment mechanism, and adding limestone and water into the limestone treatment mechanism; B. With the cooperation of the blowing mechanism, the oxygen content inside the flue gas treatment mechanism is increased, and with the cooperation of the limestone mixed liquid spraying mechanism, the flue gas is dephosphorized and desulfurized.

[0005] Preferably, the flue gas treatment mechanism includes an absorption tower, the lower end of the left side of the absorption tower is connected to an air inlet pipe, a first discharge port is opened at the middle end of the bottom of the absorption tower, a baffle plate is inserted into the inner surface of the first discharge port, and a first support leg is fixedly connected around the bottom of the absorption tower.

[0006] Preferably, the limestone processing mechanism includes a low-grade limestone processing box, second supporting legs are fixedly connected around the bottom of the low-grade limestone processing box, a feed port is opened at the right end of the top of the low-grade limestone processing box, a second discharge port is opened at the bottom of the back of the low-grade limestone processing box, a sealing cover is threadedly connected to the end of the second discharge port, a second partition is fixedly connected to the middle end of the inner cavity of the low-grade limestone processing box, and a reserved hole is opened at the left end of the inner surface of the second partition.

[0007] Preferably, the upper end of the left side of the low-grade limestone processing box is fixedly connected to a motor, the output shaft of the motor is fixedly connected to a crushing shaft, the outer surface of the crushing shaft is fixedly connected to crushing teeth, the lower end of the inner surface of the low-grade limestone processing box is movably connected to a stirring shaft, the outer surface of the stirring shaft is fixedly connected to stirring blades, and the right end of the stirring shaft is transmission-connected to the right end of the crushing shaft through a single-sided toothed synchronous belt.

[0008] Preferably, the blowing mechanism includes a second cylinder, an inner cavity of the second cylinder and a second spoiler fixedly connected to the left end of the stirring shaft, the back of the second cylinder is connected to an air inlet pipe, a one-way valve is provided on the inner surface of the air inlet pipe, and the front of the second cylinder is connected to the lower end of the front of the absorption tower through a pipeline.

[0009] Preferably, the limestone mixture spraying mechanism includes a first cylinder and a bracket, the bracket is fixedly connected to the upper end of the inner cavity of the absorption tower, the middle end of the inner surface of the bracket is fixedly connected with a rotating joint, the bottom of the rotating joint is connected with a hollow rod, the top of the rotating joint is connected with the lower end of the left side of the first cylinder through a pipeline, the bottom of the hollow rod is connected with a plurality of equally distributed nozzles, the middle end of the inner cavity of the first cylinder is fixedly connected with a first partition, the middle end of the inner surface of the first partition is movably connected with a first spoiler, the upper end of the first spoiler is transmission-connected to the hollow rod through a single-sided toothed synchronous belt, the back of the first cylinder is connected with a pump through a pipeline, the pump is fixedly connected to the back of the absorption tower, and the input end of the pump is connected with the lower end of the back of the absorption tower through a pipeline.

[0010] Compared with the prior art, the present invention has the following beneficial effects: The invention uses limestone and water as raw materials and cooperates with an air blowing mechanism and a limestone mixed liquid spraying mechanism to carry out efficient dephosphorization and desulfurization treatment on the flue gas in the flue gas treatment mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention in the first viewing angle state; Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention in a second viewing angle state; Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention in the third viewing angle state; Figure 4 This is a schematic diagram of the cross-sectional structure of the absorption tower of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the low-grade limestone processing box of the present invention.

[0012] In the figure: absorption tower 1, air inlet pipe 2, first supporting leg 3, second cylinder 4, second supporting leg 5, low-grade limestone processing box 6, motor 7, feed port 8, first cylinder 9, pump 10, second discharge port 11, air inlet pipe 12, first discharge port 13, first spoiler 14, first partition 15, crushing shaft 16, rotary joint 17, bracket 18, hollow rod 19, nozzle 20, crushing teeth 21, reserved hole 22, second spoiler 23, stirring shaft 24, stirring blade 25, second partition 26. DETAILED DESCRIPTION

[0013] 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.

[0014] The absorption tower 1, air inlet pipe 2, first supporting leg 3, second cylinder 4, second supporting leg 5, low-grade limestone processing box 6, motor 7, feed port 8, first cylinder 9, pump 10, second discharge port 11, air inlet pipe 12, first discharge port 13, first spoiler 14, first partition 15, crushing shaft 16, rotary joint 17, bracket 18, hollow rod 19, nozzle 20, crushing teeth 21, reserved holes 22, second spoiler 23, stirring shaft 24, stirring blades 25 and second partition 26 of the present application are all universal standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or through conventional experimental methods.

[0015] See also Figure 1-Figure 5 A low-grade limestone dephosphorization and desulfurization calcination flue gas treatment process comprises the following steps: A. Transport the flue gas to the flue gas treatment mechanism, and put limestone and water into the limestone treatment mechanism; B. With the cooperation of the blowing mechanism, the oxygen content inside the flue gas treatment mechanism is increased, and with the cooperation of the limestone mixed liquid spraying mechanism, the flue gas is dephosphorized and desulfurized.

[0016] The flue gas treatment mechanism includes an absorption tower 1, the lower end of the left side of the absorption tower 1 is connected to an air inlet pipe 2, a first discharge port 13 is opened at the middle end of the bottom of the absorption tower 1, a baffle plate is inserted into the inner surface of the first discharge port 13, and first support legs 3 are fixedly connected around the bottom of the absorption tower 1.

[0017] The limestone processing mechanism includes a low-grade limestone processing box 6, and the second supporting legs 5 are fixedly connected around the bottom of the low-grade limestone processing box 6. A feed port 8 is opened at the right end of the top of the low-grade limestone processing box 6, and a second discharge port 11 is opened at the bottom of the back of the low-grade limestone processing box 6. The end of the second discharge port 11 is threadedly connected with a sealing cover, and a second partition 26 is fixedly connected to the middle end of the inner cavity of the low-grade limestone processing box 6, and a reserved hole 22 is opened at the left end of the inner surface of the second partition 26.

[0018] The upper end of the left side of the low-grade limestone processing box 6 is fixedly connected to a motor 7, the output shaft of the motor 7 is fixedly connected to a crushing shaft 16, the outer surface of the crushing shaft 16 is fixedly connected to crushing teeth 21, the lower end of the inner surface of the low-grade limestone processing box 6 is movably connected to a stirring shaft 24, the outer surface of the stirring shaft 24 is fixedly connected to a stirring blade 25, and the right end of the stirring shaft 24 is transmission-connected to the right end of the crushing shaft 16 via a single-sided toothed synchronous belt.

[0019] The blowing mechanism includes a second cylinder 4, an inner cavity of the second cylinder 4 and a second spoiler 23 fixedly connected to the left end of the stirring shaft 24, the back of the second cylinder 4 is connected to the air inlet pipe 12, a one-way valve is provided on the inner surface of the air inlet pipe 12, and the front of the second cylinder 4 is connected to the lower end of the front of the absorption tower 1 through a pipeline.

[0020] The limestone mixed liquid spraying mechanism includes a first cylinder 9 and a bracket 18, the bracket 18 is fixedly connected to the upper end of the inner cavity of the absorption tower 1, the middle end of the inner surface of the bracket 18 is fixedly connected with a rotary joint 17, the bottom of the rotary joint 17 is connected with a hollow rod 19, the top of the rotary joint 17 is connected with the lower end of the left side of the first cylinder 9 through a pipeline, the bottom of the hollow rod 19 is connected with a plurality of equidistantly distributed nozzles 20, the middle end of the inner cavity of the first cylinder 9 is fixedly connected with a first baffle 15, the middle end of the inner surface of the first baffle 15 is movably connected with a first spoiler 14, the upper end of the first spoiler 14 is transmission-connected to the hollow rod 19 through a single-sided toothed synchronous belt, the back of the first cylinder 9 is connected with a pump 10 through a pipeline, the pump 10 is fixedly connected to the back of the absorption tower 1, and the input end of the pump 10 is connected with the lower end of the back of the absorption tower 1 through a pipeline.

[0021] The working principle of the present application is as follows: firstly, the electrical equipment is connected to the power supply and the controller, the flue gas is fed into the absorption tower 1 from the air inlet 2, the limestone and water are fed into the low-grade limestone treatment box 6 from the feed port 8, the motor 7 is turned on, the crushing shaft 16 can be driven to rotate, and the limestone can be crushed with the cooperation of the crushing teeth 21, the crushed limestone enters the lower part of the inner cavity of the low-grade limestone treatment box 6 from the reserved hole 22, when the crushing shaft 16 rotates, the stirring shaft 24 is driven to rotate through the single-sided tooth synchronous belt, and the mixed liquid can be stirred with the cooperation of the stirring blade 25, the pump 10 is turned on, and the crushing shaft 16 can be turned on. The mixed liquid is transported to the bottom of the inner cavity of the first cylinder 9 through a pipeline, and is transported to the hollow rod 19 through a pipeline and a rotary joint 17, and is sprayed out from the nozzle 20. After the mixed liquid enters the first cylinder 9, the first spoiler 14 will rotate, and the hollow rod 19 will be driven to rotate by a single-sided toothed synchronous belt, so that the nozzle 20 can evenly dephosphorize and desulfurize the flue gas in the absorption tower 1. When the stirring shaft 24 rotates, the second spoiler 23 will be driven to rotate, and with the cooperation of the air inlet pipe 12 and the second cylinder 4, air can be transported to the absorption tower 1 through the pipeline, thereby increasing the oxygen content in the absorption tower 1.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-grade limestone dephosphorization and desulfurization calcination flue gas treatment process, characterized in that: The following steps are involved: A. Transporting flue gas to a flue gas treatment mechanism, and adding limestone and water into the limestone treatment mechanism; B. With the cooperation of the blowing mechanism, the oxygen content inside the flue gas treatment mechanism is increased, and with the cooperation of the limestone mixed liquid spraying mechanism, the flue gas is dephosphorized and desulfurized.

2. A low-grade limestone dephosphorization and desulfurization calcination flue gas treatment process according to claim 1, characterized in that: The flue gas treatment mechanism comprises an absorption tower (1), the lower end of the left side of the absorption tower (1) is connected to an air inlet pipe (2), a first discharge port (13) is provided at the middle end of the bottom of the absorption tower (1), a baffle plate is inserted into the inner surface of the first discharge port (13), and first support legs (3) are fixedly connected to the four sides of the bottom of the absorption tower (1).

3. A low-grade limestone dephosphorization and desulfurization calcination flue gas treatment process according to claim 2, characterized in that: The limestone processing mechanism comprises a low-grade limestone processing box (6), the bottom of the low-grade limestone processing box (6) is fixedly connected to second support legs (5) on all sides, a feed port (8) is provided at the right end of the top of the low-grade limestone processing box (6), a second discharge port (11) is provided at the bottom of the back of the low-grade limestone processing box (6), a sealing cover is threadedly connected to the end of the second discharge port (11), a second partition (26) is fixedly connected to the middle end of the inner cavity of the low-grade limestone processing box (6), and a reserved hole (22) is provided at the left end of the inner surface of the second partition (26).

4. A low-grade limestone dephosphorization and desulfurization calcination flue gas treatment process according to claim 3, characterized in that: The upper end of the left side of the low-grade limestone processing box (6) is fixedly connected to a motor (7), the output shaft of the motor (7) is fixedly connected to a crushing shaft (16), the outer surface of the crushing shaft (16) is fixedly connected to crushing teeth (21), the lower end of the inner surface of the low-grade limestone processing box (6) is movably connected to a stirring shaft (24), the outer surface of the stirring shaft (24) is fixedly connected to a stirring blade (25), and the right end of the stirring shaft (24) is transmission-connected to the right end of the crushing shaft (16) via a single-sided toothed synchronous belt.

5. A low-grade limestone dephosphorization and desulfurization calcination flue gas treatment process according to claim 4, characterized in that: The air blowing mechanism comprises a second cylinder (4); a second spoiler (23) is fixedly connected to the inner cavity of the second cylinder (4) and located at the left end of the stirring shaft (24); the back of the second cylinder (4) is connected to an air inlet pipe (12); a one-way valve is provided on the inner surface of the air inlet pipe (12); and the front of the second cylinder (4) is connected to the lower end of the front of the absorption tower (1) through a pipeline.

6. A low-grade limestone dephosphorization and desulfurization calcination flue gas treatment process according to claim 4, characterized in that: The limestone mixed liquid spraying mechanism comprises a first cylinder (9) and a bracket (18), wherein the bracket (18) is fixedly connected to the upper end of the inner cavity of the absorption tower (1), a rotating joint (17) is fixedly connected to the middle end of the inner surface of the bracket (18), the bottom of the rotating joint (17) is connected to a hollow rod (19), the top of the rotating joint (17) is connected to the lower end of the left side of the first cylinder (9) through a pipeline, the bottom of the hollow rod (19) is connected to a plurality of equally spaced spray heads (20), and the first cylinder (9) is connected to the bottom of the hollow rod (19). A first baffle (15) is fixedly connected to the middle end of the inner cavity of the cylinder (9), a first spoiler (14) is movably connected to the middle end of the inner surface of the first baffle (15), the upper end of the first spoiler (14) is transmission-connected to the hollow rod (19) via a single-sided toothed synchronous belt, the back of the first cylinder (9) is connected to a pump (10) via a pipeline, the pump (10) is fixedly connected to the back of the absorption tower (1), and the input end of the pump (10) is connected to the lower end of the back of the absorption tower (1) via a pipeline.

Images