Flue gas purification active carbon injection device

Abstract

The utility model discloses a flue gas purification active carbon injection device relates to flue gas purification technical field, including flue gas purification box, conveying injection pipe, the flue gas purification box includes outer mixing jar, inner mixing jar, inlet pipe, discharge pipe, the inner mixing jar outside is fixed with the two groups spiral guide plate subassembly of distribution up and down, spiral guide plate subassembly is used for prolonging active carbon powder and flue gas contact time, the utility model discloses a flue gas purification box and spiral guide plate subassembly with inner and outer mixing jar are set up, and the spiral channel formed through two spiral guide plate subassembly, can effectively prolong the conveying path of flue gas and active carbon powder, to this reaches the effect of improving flue gas and active carbon powder contact time, simultaneously, flue gas realizes the shunting of multiple, confluence mixes, and effectively improves the mixing efficiency of flue gas and active carbon powder, can effectively improve the adsorption effect of active carbon powder to the harmful substance in the flue gas.

Description

Technical Field

[0001] This utility model relates to the field of flue gas purification technology, specifically an activated carbon injection device for flue gas purification. Background Technology

[0002] Activated carbon injection devices for flue gas purification are key equipment for treating pollutants in industrial waste gas, especially adept at adsorbing harmful substances such as dioxins, heavy metals, and acidic gases. The core of the activated carbon injection device is to utilize the huge specific surface area and abundant pore structure of activated carbon to adsorb pollutants in flue gas. Its working process mainly includes the following steps: Feeding and metering: When powdered activated carbon (usually with a particle size of 100nm-150nm) is discharged from the storage silo, it will be delivered according to the preset dosage by a precision metering device such as a frequency conversion disc feeder and a loss-in-weight feeder (with an accuracy of ±2%). Conveying and Injection: The metered activated carbon is blown into the flue through conveying pipes and injection pumps (such as Venturi injectors) under the impetus of compressed air (pressure usually 0.5-0.7MPa) or fan airflow (air pressure 30-100kPa); Mixing and Adsorption: After the activated carbon powder is sprayed through a specially designed nozzle (such as a funnel-shaped outlet or equipped with a speed-increasing cone), it can diffuse fully and mix with the flue gas, and the pollutants are adsorbed onto the surface of the activated carbon. Separation and purification: The flue gas carrying activated carbon then enters the bag filter. The fine activated carbon particles adhere to the surface of the filter bag to form a "filter bed" to further capture pollutants. The purified flue gas meets the emission standards, while the captured activated carbon powder is periodically discharged from the bottom of the dust collector.

[0003] When the activated carbon injection device for flue gas purification is in operation, the uniformity of mixing of activated carbon powder and flue gas and the contact time directly affect the adsorption efficiency of activated carbon powder on harmful substances. Based on this, in order to achieve efficient mixing of activated carbon powder and flue gas and extend the contact time between activated carbon powder and flue gas, an activated carbon injection device for flue gas purification is provided. Utility Model Content

[0004] The purpose of this invention is to provide an activated carbon injection device for flue gas purification in order to solve the problems mentioned above.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a flue gas purification activated carbon injection device, comprising a flue gas purification box and a conveying nozzle, wherein the flue gas purification box includes an outer mixing tank, an inner mixing tank, an inlet pipe, and an outlet pipe; The inner mixing tank is fixed to the bottom of the inner cavity of the outer mixing tank, the air inlet pipe is fixed to the bottom of the inner mixing tank and communicates with the inner cavity of the inner mixing tank, and the conveying nozzle passes through the top of the outer mixing tank and extends to the inside of the inner mixing tank. The flue gas and activated carbon powder are conveyed to the inside of the inner mixing tank through the air inlet pipe and the conveying nozzle to achieve the initial mixing of activated carbon powder and flue gas. Two sets of spiral guide plate assemblies are fixed on the outer side of the inner mixing tank, and the two sets of spiral guide plate assemblies divide the space between the outer mixing tank and the inner mixing tank into a secondary mixing chamber, a tertiary mixing chamber, and a quaternary mixing chamber. The discharge pipe is fixed on one side of the outer wall of the outer mixing tank near the bottom and is connected to the quaternary mixing chamber. The spiral guide plate assemblies are used to extend the contact time between activated carbon powder and flue gas. The secondary mixing chamber, tertiary mixing chamber, and quaternary mixing chamber are used to achieve multiple mixing of activated carbon powder and flue gas.

[0006] As a further embodiment of this utility model: the spiral guide plate assembly includes multiple annularly distributed spiral blades, the inner side of the spiral blades is welded and fixed to the outer wall of the inner mixing tank, and the outer side of the spiral blades is welded and fixed to the inner wall of the outer mixing tank.

[0007] As a further embodiment of this utility model: a Venturi tube is fixed to the top of the inner mixing tank, and a flared mouth is fixed to the top of the Venturi tube. The Venturi tube and the flared mouth are distributed inside the secondary mixing chamber, and the top of the flared mouth does not contact the top of the inner wall of the outer mixing tank.

[0008] As a further embodiment of this utility model: a dispersing cone is fixed at the top center of the inner wall of the outer mixing tank, and the conveying nozzle passes through the center of the dispersing cone.

[0009] As a further improvement of this utility model, the delivery nozzle and the air intake pipe are aligned vertically.

[0010] Compared with the prior art, the beneficial effects of this utility model are: By setting up a flue gas purification box with internal and external mixing tanks and a spiral guide plate assembly, the spiral channel formed by the two sets of spiral guide plate assemblies can effectively extend the conveying path of flue gas and activated carbon powder, thereby increasing the contact time between flue gas and activated carbon powder. At the same time, the flue gas achieves multiple diversion and merging mixing, which effectively improves the mixing efficiency of flue gas and activated carbon powder, and can effectively improve the adsorption effect of activated carbon powder on harmful substances inside the flue gas. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the external mixing tank of this utility model; Figure 3This is a cross-sectional view of the outer mixing tank and the inner mixing tank of this utility model.

[0012] In the diagram: 1. Flue gas purification box; 101. External mixing tank; 102. Internal mixing tank; 103. Venturi tube; 104. Trumpet mouth; 105. Inlet pipe; 106. Dispersion cone; 107. Secondary mixing chamber; 108. Tertiary mixing chamber; 109. Quaternary mixing chamber; 110. Discharge pipe; 2. Conveying nozzle; 3. Spiral guide plate assembly. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figures 1-3 In this embodiment of the utility model, a flue gas purification activated carbon injection device includes a flue gas purification box 1 and a conveying nozzle 2. The flue gas purification box 1 includes an outer mixing tank 101, an inner mixing tank 102, an air inlet pipe 105, and an outlet pipe 110. The inner mixing tank 102 is fixed to the bottom of the inner cavity of the outer mixing tank 101. The air inlet pipe 105 is fixed to the bottom of the inner mixing tank 102 and communicates with the inner cavity of the inner mixing tank 102. The conveying nozzle 2 passes through the top of the outer mixing tank 101 and extends to the inside of the inner mixing tank 102. The flue gas and activated carbon powder are conveyed to the inside of the inner mixing tank 102 through the air inlet pipe 105 and the conveying nozzle 2 to achieve the initial mixing of activated carbon powder and flue gas. Two sets of spiral guide plate assemblies 3 are fixed on the outer side of the inner mixing tank 102, which are distributed vertically. The two sets of spiral guide plate assemblies 3 divide the space between the outer mixing tank 101 and the inner mixing tank 102 into a secondary mixing chamber 107, a tertiary mixing chamber 108, and a quaternary mixing chamber 109. The discharge pipe 110 is fixed to the outer wall of the outer mixing tank 101 near the bottom and is connected to the quaternary mixing chamber 109. The spiral guide plate assembly 3 is used to extend the contact time between activated carbon powder and flue gas. The secondary mixing chamber 107, the tertiary mixing chamber 108, and the quaternary mixing chamber 109 are used to achieve multiple mixing of activated carbon powder and flue gas. The spiral guide plate assembly 3 includes multiple annularly distributed spiral blades. The inner side of the spiral blades is welded and fixed to the outer wall of the inner mixing tank 102, and the outer side of the spiral blades is welded and fixed to the inner wall of the outer mixing tank 101.

[0015] In this embodiment, it should be noted that when the flue gas purification box 1 is in use, the conveying nozzle 2 is connected to the activated carbon feeding device, the air inlet pipe 105 is connected to the flue gas conveying device, and the discharge pipe 110 is connected to the bag filter. Its operating principle is as follows: The external activated carbon feeding device operates synchronously with the flue gas conveying device, conveying the flue gas and activated carbon powder to the inner mixing tank 101 through the air inlet pipe 105 and the conveying nozzle 2, respectively. The activated carbon powder is sprayed out through the nozzle at the bottom of the conveying nozzle 2 and is initially mixed with the flue gas. The mixed flue gas and activated carbon powder enter the secondary mixing chamber 107 upwards. Then, it enters the tertiary mixing chamber 108 along the spiral channel formed by the first set of spiral guide plate assemblies 3. Then, it enters the quaternary mixing chamber 109 along the spiral channel formed by the second set of spiral guide plate assemblies 3 (it should be noted that multiple spiral channels are formed between the multiple spiral blades of the spiral guide plate assembly 3). Finally, it is discharged to the bag filter through the discharge pipe 110. In the above process, the spiral channel formed by the two sets of spiral guide plate assemblies 3 can effectively extend the conveying path of flue gas and activated carbon powder, thereby increasing the contact time between flue gas and activated carbon powder. At the same time, in multiple mixing chambers 108, the flue gas is split and merged multiple times, which effectively improves the mixing efficiency of flue gas and activated carbon powder. Thus, the adsorption effect of activated carbon powder on harmful substances inside the flue gas can be effectively improved.

[0016] Please refer to this carefully. Figures 2-3 The top of the inner mixing tank 102 is fixed with a Venturi tube 103, and the top of the Venturi tube 103 is fixed with a bell mouth 104. The Venturi tube 103 and the bell mouth 104 are distributed inside the secondary mixing chamber 107, and the top of the bell mouth 104 does not contact the top of the inner wall of the outer mixing tank 101. A dispersing cone 106 is fixed at the top center of the inner wall of the outer mixing tank 101, and a conveying nozzle 2 passes through the center of the dispersing cone 106.

[0017] In this embodiment: after the flue gas and activated carbon powder are initially mixed in the inner mixing tank 102, they are conveyed upward through the venturi tube 103 and the bell mouth 104 and impact the dispersing cone 106. This allows the flue gas and activated carbon powder to be dispersed in all directions and enter the interior of the secondary mixing chamber 107. The flue gas and activated carbon powder tumble and mix in the secondary mixing chamber 107 to achieve secondary mixing. Then, the flow is diverted to multiple spiral channels of the first set of spiral guide plate assembly 3, and converges in the three-stage mixing chamber 108 to achieve the third mixing; Then, the flow is diverted to multiple spiral channels of the second set of spiral guide plate assembly 3, and finally converges in the fourth mixing chamber 108 to achieve the fourth mixing, thus realizing the efficient mixing of flue gas and activated carbon powder.

[0018] Please refer to this carefully. Figures 2-3 The delivery nozzle 2 and the air intake pipe 105 are aligned vertically.

[0019] In this embodiment: This structure allows the flue gas to counteract the sprayed activated carbon powder when it enters the inner mixing tank 102, thereby improving the diffusion effect of the activated carbon powder and increasing the uniformity of the mixing between the activated carbon powder and the flue gas.

[0020] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A flue gas cleaning activated carbon injection device comprising a flue gas cleaning tank (1), a delivery lance (2), characterized in that, The flue gas purification box (1) includes an outer mixing tank (101), an inner mixing tank (102), an air inlet pipe (105), and an exhaust pipe (110). The inner mixing tank (102) is fixed to the bottom of the inner cavity of the outer mixing tank (101), the air inlet pipe (105) is fixed to the bottom of the inner mixing tank (102) and communicates with the inner cavity of the inner mixing tank (102), and the conveying nozzle (2) passes through the top of the outer mixing tank (101) and extends to the inside of the inner mixing tank (102). The flue gas and activated carbon powder are conveyed to the inner mixing tank (102) through the air inlet pipe (105) and the conveying nozzle (2) respectively to achieve the initial mixing of activated carbon powder and flue gas. Two sets of spiral guide plate assemblies (3) are fixed on the outside of the inner mixing tank (102) and distributed vertically. The two sets of spiral guide plate assemblies (3) divide the space between the outer mixing tank (101) and the inner mixing tank (102) into a secondary mixing chamber (107), a tertiary mixing chamber (108), and a quaternary mixing chamber (109). The discharge pipe (110) is fixed on the outer wall of the outer mixing tank (101) near the bottom and is connected to the quaternary mixing chamber (109). The spiral guide plate assembly (3) is used to extend the contact time between activated carbon powder and flue gas. The secondary mixing chamber (107), tertiary mixing chamber (108), and quaternary mixing chamber (109) are used to realize multiple mixing of activated carbon powder and flue gas.

2. The flue gas cleaning activated carbon injection apparatus according to claim 1, characterized by The spiral guide plate assembly (3) includes multiple annularly distributed spiral blades. The inner side of the spiral blades is welded and fixed to the outer wall of the inner mixing tank (102), and the outer side of the spiral blades is welded and fixed to the inner wall of the outer mixing tank (101).

3. The flue gas cleaning activated carbon injection apparatus according to claim 1, wherein The top of the inner mixing tank (102) is fixed with a Venturi tube (103), and the top of the Venturi tube (103) is fixed with a bell mouth (104). The Venturi tube (103) and the bell mouth (104) are distributed inside the secondary mixing chamber (107), and the top of the bell mouth (104) does not contact the top of the inner wall of the outer mixing tank (101).

4. The flue gas cleaning activated carbon injection apparatus according to claim 1, wherein A dispersing cone (106) is fixed at the top center of the inner wall of the outer mixing tank (101), and the conveying nozzle (2) passes through the center of the dispersing cone (106).

5. The flue gas cleaning activated carbon injection apparatus according to claim 1, wherein The delivery nozzle (2) and the air inlet pipe (105) are aligned vertically.

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