Dry flue gas desulfurization and denitrification device for boiler waste gas

Abstract

The utility model provides a dry flue gas desulfurization and denitrification device for boiler waste gas, which belongs to the technical field of desulfurization and denitrification and comprises a desulfurization and denitrification box, a dust removal box is mounted on the left side of the desulfurization and denitrification box, a gas inlet pipe is arranged below the left side of the dust removal box in a penetrating manner, and an air blower is mounted on the gas inlet pipe. A first dust blocking net is fixedly arranged on the lower portion of the inner side of the dust removal box, an activated carbon adsorption plate is installed in the center of the inner side of the dust removal box, an air inlet device is installed at the top of the right side of the dust removal box and penetrates through the desulfurization and denitrification box, and a liquid adding hopper penetrates through the bottom of the desulfurization and denitrification box; according to the desulfurization and denitrification device, the gas inlet device is arranged, waste gas enters the transverse pipe through the inverted L-shaped gas inlet pipe and then is exhausted through the gas exhaust hole, the gas directly enters a desulfurization and denitrification agent in the desulfurization and denitrification box, the waste gas can be in full contact with the desulfurization and denitrification agent conveniently, and the desulfurization and denitrification effect of the desulfurization and denitrification agent on the waste gas is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a winding device technical field, especially a kind of dry flue gas desulfurization and denitrification device for boiler exhaust gas. BACKGROUND

[0002] Coal-fired boiler will produce a large amount of flue gas when using, and the particles, sulfur compounds and nitrogen compounds contained in flue gas are all atmospheric pollutants, and the current treatment method of coal-fired boiler flue gas is mainly wet treatment method, which is desulfurization and denitrification treatment by spraying desulfurization and denitrification agent into exhaust gas.

[0003] For example, in the prior art, a desulfurization and denitrification device for coal-fired boiler flue gas treatment is disclosed in patent No. CN210385192U, which sets first and second spraying devices perpendicular to each other in the desulfurization and denitrification tank. Under the action of cross spraying, the airflow in the desulfurization and denitrification tank flows irregularly, so that the flue gas can be more fully contacted with the reaction agent, the reaction rate is improved, and the reaction is more complete, so the treatment of flue gas is more complete.

[0004] However, the device has a short residence time of exhaust gas in the desulfurization and denitrification tank when desulfurizing and denitrifying exhaust gas. Although the first and second spraying devices can increase the contact between the desulfurization and denitrification agent and the exhaust gas, the reaction between the desulfurization and denitrification agent and the sulfur compounds and nitrogen compounds in the exhaust gas requires time, and the short residence time of exhaust gas in the desulfurization and denitrification tank can easily lead to incomplete reaction, affecting the desulfurization and denitrification effect. Therefore, a dry flue gas desulfurization and denitrification device for boiler exhaust gas is designed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims to solve the problems in the background art and provides a dry flue gas desulfurization and denitrification device for boiler exhaust gas.

[0006] The utility model solves the problem of short residence time of exhaust gas in the desulfurization and denitrification tank in the prior art, which can easily lead to incomplete reaction between the desulfurization and denitrification agent in the exhaust gas and the sulfur compounds and nitrogen compounds in the exhaust gas, affecting the desulfurization and denitrification effect.

[0007] The utility model provides a kind of dry method flue gas desulfurization and denitrification device for boiler exhaust, including desulfurization and denitrification box, the left side of desulfurization and denitrification box is equipped with dust removal tank, the left side below of dust removal tank is equipped with air inlet pipe, air inlet pipe is equipped with air blower on, the inboard below of dust removal tank is fixedly provided with first dust screen, the inboard central of dust removal tank is equipped with activated carbon adsorption plate, the right side top of dust removal tank is equipped with air inlet device, and air inlet device is penetrated in desulfurization and denitrification box, the bottom of desulfurization and denitrification box is equipped with liquid adding hopper, the below of liquid adding hopper is equipped with first valve, the right side surface of desulfurization and denitrification box is equipped with exhaust pipe, the right end of exhaust pipe is equipped with drying box penetratingly;

[0008] The air inlet device includes an inverted L-shaped air inlet pipe, a horizontal pipe, and exhaust holes. The inverted L-shaped air inlet pipe penetrates the right side surface of the dust removal tank. The bottom of the inverted L-shaped air inlet pipe is equipped with a horizontal pipe. The bottom of the horizontal pipe is equipped with a plurality of exhaust holes.

[0009] Preferably, the horizontal height of the horizontal pipe is lower than the liquid level of the desulfurization and denitrification solvent in the desulfurization and denitrification box.

[0010] Preferably, the inner and outer surfaces of the horizontal pipe are both fixedly equipped with baffles, and there is a distance between the baffles and the inner side wall of the desulfurization and denitrification box.

[0011] Preferably, a second dust screen is installed in the central part of the inboard of the desulfurization and denitrification box, and the horizontal height of the second dust screen is higher than that of the horizontal pipe.

[0012] Preferably, the drying box includes a mesh box and a drying agent. The right end of the inside of the drying box is embedded with a mesh box, and the mesh box contains a drying agent.

[0013] Preferably, a motor is installed on the left side surface below the desulfurization and denitrification box. The output end of the motor is fixedly equipped with a material guiding auger. A liquid discharge pipe is penetrated on the right side surface of the desulfurization and denitrification box, and a second valve is installed on the liquid discharge pipe.

[0014] Preferably, the bottom of the desulfurization and denitrification box is in the shape of a circular arc that matches the material guiding auger. The material guiding auger is located at the inboard bottom of the desulfurization and denitrification box, and it extends into the liquid discharge pipe.

[0015] Preferably, a spraying assembly is also installed in the desulfurization and denitrification box. The spraying assembly includes a water pump, an inverted L-shaped water pipe, and spray heads. The water pump is fixedly installed on the right side of the inside of the desulfurization and denitrification box. The output end of the water pump is equipped with an inverted L-shaped water pipe. A plurality of spray heads are penetrated on the bottom of the inverted L-shaped water pipe.

[0016] Preferably, the horizontal height of the water pump is higher than the horizontal height of the second dust screen, and the horizontal height of the water pump is lower than the liquid level of the desulfurization and denitrification agent in the desulfurization and denitrification tank.

[0017] 1、The utility model discloses a dust removal tank is provided with, the dust in waste gas is blocked through the first dust screen in dust removal tank, and the dust falls in the bottom of dust removal tank and is collected, and through the activated carbon adsorption board, the peculiar smell in waste gas is adsorbed, prevents the dust from entering the desulfurization and denitrification tank, guarantees the desulfurization and denitrification efficiency of desulfurization and denitrification tank.

[0018] 2、The utility model discloses a gas inlet device is provided with, and waste gas enters into the horizontal pipe through the inverted L shape air inlet pipe, and then is discharged through the exhaust hole, and the gas directly enters the desulfurization and denitrification agent in the desulfurization and denitrification tank, and the waste gas is contacted with the desulfurization and denitrification agent fully, guarantees the desulfurization and denitrification effect of desulfurization and denitrification agent to waste gas.

[0019] 3、The utility model discloses a baffle is provided with, and the baffle can block the waste gas that the exhaust hole of horizontal pipe bottom discharges, so that the waste gas flows up from the gap between the baffle four -around and desulfurization and denitrification tank, increases the residence time of waste gas in the desulfurization and denitrification agent, increases the contact time of desulfurization and denitrification agent and waste gas, and increases the effect of desulfurization and denitrification.

[0020] 4、The utility model discloses a second dust screen is provided with, and the dust in the waste gas that the exhaust hole discharges is blocked and filtered through the second dust screen, prevents the dust from being in the top of second dust screen, prevents the dust in waste gas from flowing up to the exhaust pipe place and discharging along with waste gas.

[0021] 5、The utility model discloses a drying tank is provided with, and after waste gas is discharged to the drying tank through the exhaust pipe, the moisture in waste gas is adsorbed through the drying agent in the net box, avoids the existence of desulfurization and denitrification agent in waste gas and causes secondary pollution to the environment.

[0022] 6、The utility model discloses a material guiding auger is provided with, and the precipitate that the sulfide and nitride in waste gas and desulfurization and denitrification agent reaction produce deposits in the inside bottom of desulfurization and denitrification tank, and the material guiding auger is rotated through the motor, and the material guiding auger moves the precipitate to the right side, and until the drain pipe discharges, prevents the precipitate from causing the drain pipe to be blocked in the process of discharging of drain pipe.

[0023] 7、The utility model discloses a spraying assembly is provided with, and the water pump is extracted to the inverted L shape water pipe through the desulfurization and denitrification agent on the top of desulfurization and denitrification tank, and then is sprayed through the nozzle, so that the waste gas that flows up from the exhaust hole is contacted with the desulfurization and denitrification agent and reacts again, further increases the reaction time of desulfurization and denitrification agent and waste gas, and increases the desulfurization and denitrification effect. DRAWINGS

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0025] Figure 1 This is a cross-sectional schematic diagram of the overall structure of this utility model.

[0026] Figure 2 This is a three-dimensional structural diagram of the air intake device of this utility model.

[0027] Figure 3 This is a three-dimensional structural diagram of the air intake device of this utility model, viewed from below.

[0028] Figure 4 This is a schematic cross-sectional view of the drying oven of this utility model.

[0029] Figure 5 This is a cross-sectional structural diagram of the spraying component of this utility model.

[0030] [Figure Labels]

[0031] 1. Desulfurization and denitrification box; 2. Dust removal box; 3. Air inlet pipe; 4. Blower; 5. First dust filter; 6. Activated carbon adsorption plate; 7. Cover; 8. Inverted L-shaped air inlet pipe; 801. Horizontal pipe; 802. Exhaust port; 803. Baffle; 9. Liquid addition hopper; 901. First valve; 10. Exhaust pipe; 11. Drying box; 1101. Wire mesh box; 1102. Desiccant; 12. Second dust filter; 13. Motor; 1301. Material guide auger; 14. Drain pipe; 1401. Second valve; 15. Water pump; 1501. Inverted L-shaped water pipe; 1502. Nozzle. Detailed Implementation Example

[0032] like Figures 1-5 As shown, an embodiment of this utility model provides a dry flue gas desulfurization and denitrification device for boiler exhaust gas, including a desulfurization and denitrification box 1, a dust removal box 2 installed on the left side of the desulfurization and denitrification box 1, an air inlet pipe 3 penetrating through the lower left side of the dust removal box 2, a blower 4 installed on the air inlet pipe 3, a first dust filter 5 fixedly installed on the lower inner side of the dust removal box 2, an activated carbon adsorption plate 6 installed in the center of the inner side of the dust removal box 2, an air inlet device installed on the top right side of the dust removal box 2, and the air inlet device penetrating through the desulfurization and denitrification box 1, a liquid addition hopper 9 penetrating through the bottom of the desulfurization and denitrification box 1, a first valve 901 installed below the liquid addition hopper 9, an exhaust pipe 10 penetrating through the upper right side surface of the desulfurization and denitrification box 1, and a drying box 11 penetrating through the right end of the exhaust pipe 10.

[0033] The air inlet device comprises an inverted L-shaped air inlet pipe 8, a horizontal pipe 801 and exhaust holes 802, the inverted L-shaped air inlet pipe 8 penetrates above the right side surface of the dust removal box 2, the bottom of the inverted L-shaped air inlet pipe 8 is provided with the horizontal pipe 801, and the bottom of the horizontal pipe 801 is provided with a plurality of exhaust holes 802.

[0034] By arranging the dust removal box 2, the dust in the waste gas is blocked by the first dust screen 5 in the dust removal box 2, and the dust falls to the bottom of the dust removal box 2 for collection, and the odor in the waste gas is adsorbed by the activated carbon adsorption plate 6, so that the dust is prevented from entering the desulfurization and denitrification tank 1, and the desulfurization and denitrification efficiency of the desulfurization and denitrification tank 1 is ensured.

[0035] By arranging the air inlet device, the waste gas enters the horizontal pipe 801 through the inverted L-shaped air inlet pipe 8, and then is discharged through the exhaust holes 802, so that the gas directly enters the desulfurization and denitrification agent in the desulfurization and denitrification tank 1, the waste gas is facilitated to fully contact with the desulfurization and denitrification agent, and the desulfurization and denitrification effect of the desulfurization and denitrification agent on the waste gas is ensured.

[0036] In the embodiment, the horizontal height of the horizontal pipe 801 is lower than the horizontal height of the desulfurization and denitrification solvent liquid surface in the desulfurization and denitrification tank 1, so that the waste gas discharged from the exhaust holes 802 on the horizontal pipe 801 directly enters the desulfurization and denitrification solvent in the desulfurization and denitrification tank 1, the waste gas is facilitated to fully contact with the desulfurization and denitrification solvent, and the desulfurization and denitrification efficiency is increased.

[0037] In the embodiment, the inner and outer side surfaces of the horizontal pipe 801 are both fixedly provided with the baffle 803, and a distance exists between the baffle 803 and the inner side wall of the desulfurization and denitrification tank 1.

[0038] By arranging the baffle 803, the baffle 803 can block the waste gas discharged from the exhaust holes 802 at the bottom of the horizontal pipe 801, so that the waste gas flows upward from the gap between the baffle 803 and the desulfurization and denitrification tank 1, the residence time of the waste gas in the desulfurization and denitrification agent is increased, the contact time between the desulfurization and denitrification agent and the waste gas is increased, and the desulfurization and denitrification effect is increased.

[0039] In the embodiment, the inner side of the desulfurization and denitrification tank 1 is centrally provided with the second dust screen 12, and the horizontal height of the second dust screen 12 is higher than the horizontal height of the horizontal pipe 801.

[0040] By arranging the second dust screen 12, the second dust screen 12 can block and filter the dust in the waste gas discharged from the exhaust holes 802, so that the dust is prevented from being above the second dust screen 12, and the dust in the waste gas is prevented from flowing upward to the exhaust pipe 10.

[0041] In the embodiment, the drying tank 11 comprises a mesh tank 1101 and a drying agent 1102, the mesh tank 1101 is embedded at the inner right end of the drying tank 11, and the mesh tank 1101 is provided with the drying agent 1102.

[0042] By setting the drying box 11, the exhaust gas is discharged into the drying box 11 through the exhaust pipe 10, and the moisture in the exhaust gas is adsorbed by the drying agent 1102 in the net box 1101, avoiding the secondary pollution of the desulfurization and denitrification agent in the exhaust gas to the environment.

[0043] In this embodiment, a motor 13 is installed below the left side surface of the desulfurization and denitrification box 1, and a material guiding auger 1301 is fixedly arranged at the output end of the motor 13. A liquid discharge pipe 14 is arranged through the right side surface of the desulfurization and denitrification box 1, and a second valve 1401 is installed on the liquid discharge pipe 14.

[0044] In this embodiment, the bottom of the desulfurization and denitrification box 1 is in the shape of a circular arc matching the material guiding auger 1301, and the material guiding auger 1301 is located at the inner bottom of the desulfurization and denitrification box 1, and extends into the liquid discharge pipe 14.

[0045] By setting the material guiding auger 1301, the precipitates generated by the reaction of sulfides and nitrides in the exhaust gas with the desulfurization and denitrification agent are deposited at the inner bottom of the desulfurization and denitrification box 1. The material guiding auger 1301 is driven to rotate by the motor 13, and the precipitates are moved to the right side by the material guiding auger 1301, and are discharged through the liquid discharge pipe 14, preventing the precipitates from blocking the liquid discharge pipe 14 during the liquid discharge process.

[0046] In this embodiment, a spraying assembly is further installed in the desulfurization and denitrification box 1, which comprises a water pump 15, an inverted L-shaped water pipe 1501, and a plurality of spray heads 1502. The water pump 15 is fixedly arranged at the right side of the interior of the desulfurization and denitrification box 1, the inverted L-shaped water pipe 1501 is installed at the output end of the water pump 15, and the plurality of spray heads 1502 are arranged through the lower portion of the inverted L-shaped water pipe 1501.

[0047] In this embodiment, the horizontal height of the water pump 15 is higher than the horizontal height of the second dust screen 12, and the horizontal height of the water pump 15 is lower than the liquid level of the desulfurization and denitrification agent in the desulfurization and denitrification box 1.

[0048] By setting the spraying assembly, the desulfurization and denitrification agent above the desulfurization and denitrification box 1 is pumped into the inverted L-shaped water pipe 1501 by the water pump 15, and is sprayed out through the spray heads 1502, so that the exhaust gas flowing upward from the exhaust hole 802 is in contact with the desulfurization and denitrification agent again, further increasing the reaction time of the desulfurization and denitrification agent with the exhaust gas, and increasing the desulfurization and denitrification effect.

[0049] The above is only a preferred embodiment of the present application, and it should be pointed out that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which should also be considered as the protection range of the present application, and these will not affect the effect and practicality of the present application.

Claims

1. A dry flue gas desulfurization and denitrification device for boiler exhaust gas, characterized by: The utility model provides a desulfurization and denitrification box (1), the left side of desulfurization and denitrification box (1) is equipped with dust removal box (2), the left side below of dust removal box (2) is equipped with the through arrangement of air inlet pipe (3), air inlet pipe (3) is equipped with air blower (4) on, the inboard lower side of dust removal box (2) is fixedly arranged with first dust screen (5), the inboard central of dust removal box (2) is equipped with activated carbon adsorption plate (6), the right side top of dust removal box (2) is equipped with air inlet device, and air inlet device is through in desulfurization and denitrification box (1), the bottom of desulfurization and denitrification box (1) is equipped with the through arrangement of liquid adding hopper (9), the below of liquid adding hopper (9) is equipped with first valve (901), the right side surface of desulfurization and denitrification box (1) is equipped with the through arrangement of exhaust pipe (10) on the top, the right end of exhaust pipe (10) is equipped with drying box (11) through, The air inlet device includes an inverted L-shaped air inlet pipe (8), a horizontal pipe (801), and exhaust holes (802). The inverted L-shaped air inlet pipe (8) is through the right side surface of the dust removal box (2) on the top. The bottom of the inverted L-shaped air inlet pipe (8) is equipped with a horizontal pipe (801). The bottom of the horizontal pipe (801) is equipped with multiple exhaust holes (802).

2. The dry flue gas desulfurization and denitrification device for boiler exhaust gas according to claim 1, characterized in that: The horizontal height of the horizontal pipe (801) is lower than the liquid level of the desulfurization and denitrification solvent in the desulfurization and denitrification box (1).

3. The dry flue gas desulfurization and denitrification device for boiler exhaust gas according to claim 2, characterized in that: The inner and outer side surfaces of the horizontal pipe (801) are both fixedly equipped with baffles (803). There is a distance between the baffles (803) and the inner side wall of the desulfurization and denitrification box (1).

4. The dry flue gas desulfurization and denitrification device for boiler exhaust gas according to claim 1, characterized by: The inboard central of desulfurization and denitrification box (1) is equipped with second dust screen (12), the horizontal height of second dust screen (12) is higher than the horizontal high of horizontal pipe (801).

5. The dry flue gas desulfurization and denitrification device for boiler exhaust gas according to claim 1, characterized by: The drying box (11) includes a mesh box (1101) and a drying agent (1102). The right end of the inside of the drying box (11) is embedded with a mesh box (1101). The mesh box (1101) contains a drying agent (1102).

6. The dry flue gas desulfurization and denitrification device for boiler exhaust gas according to claim 1, characterized by: The left side surface of the desulfurization and denitrification box (1) is equipped with a motor (13) below. The output end of the motor (13) is fixedly equipped with a material guiding auger (1301). The right side surface of the desulfurization and denitrification box (1) is equipped with a liquid discharge pipe (14) through. The liquid discharge pipe (14) is equipped with a second valve (1401).

7. The dry flue gas desulfurization and denitrification device for boiler exhaust gas according to claim 6, characterized in that: The bottom of the desulfurization and denitrification box (1) is in the shape of a circular arc that matches the material guiding auger (1301). The material guiding auger (1301) is at the inboard bottom of the desulfurization and denitrification box (1). The material guiding auger (1301) extends into the liquid discharge pipe (14).

8. The dry flue gas desulfurization and denitrification device for boiler exhaust gas according to claim 4, characterized by: The inside of the desulfurization and denitrification box (1) is also equipped with a spraying assembly. The spraying assembly includes a water pump (15), an inverted L-shaped water pipe (1501), and spray heads (1502). The water pump (15) is fixedly arranged at the right side of the inside of the desulfurization and denitrification box (1). The output end of the water pump (15) is equipped with an inverted L-shaped water pipe (1501). The bottom of the inverted L-shaped water pipe (1501) is equipped with multiple spray heads (1502) through.

9. The dry flue gas desulfurization and denitrification device for boiler exhaust gas according to claim 8, characterized by: The water pump (15) is higher than the second dust screen (12) in height, and the water pump (15) is lower than the liquid level of the desulfurization and denitrification agent in the desulfurization and denitrification tank (1) in height.

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