Powdered activated carbon dosing system for flue gas treatment

Abstract

The utility model discloses a kind of powder activated carbon's dosing system for flue gas disposal, separate from lime dosing system and including activated carbon ton bag, primary feed pipe, vacuum feeding machine, activated carbon bin and discharging equipment. One end of primary feed pipe is inserted activated carbon ton bag through suction tube;The feed inlet of vacuum feeding machine is connected with the other end of primary feed pipe;The import of activated carbon bin is connected with the discharge port of vacuum feeding machine through secondary feed pipe;Discharging equipment includes sequentially connected primary screw conveyor, weighing hopper, secondary screw conveyor;The import of primary screw conveyor is connected with the export of activated carbon bin through tertiary feed pipe;The import of weighing hopper is connected with the export of primary screw conveyor;The import of secondary screw conveyor is connected with the export of weighing hopper, and the export of this secondary screw conveyor is connected with flue gas washing device through quaternary feed pipe.The utility model not only eliminates the risk of dust escape, but also eliminates the possibility of impurities entering.

Description

Technical Field

[0001] This utility model relates to a powdered activated carbon dosing system for flue gas treatment in a hazardous waste incineration system. Background Technology

[0002] In hazardous waste incineration systems, activated carbon is used to adsorb heavy metal pollutants in flue gas, while lime absorbs acidic substances. Conventional activated carbon dosing systems use ton bags, and the system has a vertical structure, consisting of activated carbon ton bags, silos, weighing hoppers, and activated carbon dosing devices from top to bottom. The activated carbon ton bags discharge into the silo through an opening at the bottom; this section is typically open. The activated carbon powder is temporarily stored in the silo and then conveyed via a long-distance pipeline to the flue gas scrubbing unit of the incineration line after passing through the weighing hopper. Lime is also transported to the flue gas scrubbing unit using the same pipeline and fan. During the activated carbon dispensing process, because the section from the ton bag to the silo is open, activated carbon can escape from the silo opening, especially when the silo leaks air.

[0003] Traditional activated carbon feeding systems have the following problems:

[0004] 1. Dust leakage: The use of open-type ton bag feeding causes the activated carbon powder to escape due to vibration of the activated carbon feeding equipment, polluting the environment and causing waste;

[0005] 2. Poor system stability: Activated carbon and lime share the same pipeline. Moist air entering the pipeline will cause the lime to solidify, leading to pipeline blockage and affecting the transportation of activated carbon and lime.

[0006] 3. Impurities: Open silos are prone to contamination by fragments from ton bags, which can easily cause malfunctions in the feed screw of the activated carbon dosing device. Utility Model Content

[0007] The purpose of this invention is to overcome the defects of the prior art and provide a powdered activated carbon dosing system for flue gas treatment, which not only eliminates the risk of dust escape but also eliminates the possibility of impurities entering.

[0008] The purpose of this utility model is achieved as follows: a powdered activated carbon dosing system for flue gas treatment, separate from the lime dosing system, includes activated carbon ton bags, a primary conveying pipe, a vacuum feeder, an activated carbon silo, and a discharge device; wherein,

[0009] One end of the primary conveying pipe is inserted into the activated carbon ton bag via a suction pipe;

[0010] The inlet of the vacuum feeder is connected to the other end of the primary conveying pipe;

[0011] The inlet of the activated carbon silo is connected to the discharge port of the vacuum feeder via a secondary conveying pipe;

[0012] The feeding equipment includes a primary screw conveyor, a weighing hopper, and a secondary screw conveyor connected in sequence; the inlet of the primary screw conveyor is connected to the outlet of the activated carbon silo via a tertiary conveying pipe; the inlet of the weighing hopper is connected to the outlet of the primary screw conveyor; the inlet of the secondary screw conveyor is connected to the outlet of the weighing hopper, and the outlet of the secondary screw conveyor is connected to the flue gas scrubbing device via a quaternary conveying pipe.

[0013] The above-mentioned powdered activated carbon dosing system for flue gas treatment includes a vacuum feeder comprising a hopper, a vacuum generator, and a filter; the inlet of the hopper is connected to the other end of the primary conveying pipe, the vacuum generator is installed on the top of the hopper, and the filter is installed inside the hopper.

[0014] In the above-mentioned powdered activated carbon dosing system for flue gas treatment, a filter dust collector and a fan are sequentially installed on the top of the activated carbon silo.

[0015] The features of the powdered activated carbon dosing system for flue gas treatment of this utility model are:

[0016] The fully enclosed structure not only eliminates the risk of dust escaping and avoids the waste of activated carbon powder, but also eliminates the possibility of impurities entering, effectively improving the stability of the activated carbon dosing system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the powdered activated carbon dosing system for flue gas treatment according to this utility model. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Please see Figure 1 The powdered activated carbon dosing system for flue gas treatment of this utility model is separate from the lime dosing system and includes an activated carbon ton bag 1, a primary conveying pipe 3, a vacuum feeder 4, an activated carbon silo 6, and a discharge device.

[0020] One end of the primary conveying pipe 3 is connected to a suction pipe 2, and the lower part of the suction pipe 2 is inserted into the activated carbon ton bag 1.

[0021] The vacuum feeder 4 includes a hopper 40, a vacuum generator 41, and a filter; the inlet of the hopper 40 is connected to the other end of the primary conveying pipe 3, the vacuum generator 41 is installed on the top of the hopper 40, and the filter is installed inside the hopper 40.

[0022] The inlet of the activated carbon silo 6 is connected to the discharge port 42 of the vacuum feeder 4 through the secondary conveying pipe 5. The activated carbon silo 6 is a fully enclosed structure. The top of the activated carbon silo 6 is equipped with a filter dust collector 61 and a fan 62 in sequence, so that the air in the activated carbon silo 6 is first filtered and dust removed by the filter dust collector 61, and then discharged into the environment by the fan 62, so as not to cause dust emission.

[0023] The feeding equipment includes a primary screw conveyor 81, a weighing hopper 82, and a secondary screw conveyor 83 connected in sequence. The inlet of the primary screw conveyor 81 is connected to the outlet of the activated carbon silo 6 through a tertiary conveying pipe 7. The inlet of the weighing hopper 82 is connected to the outlet of the primary screw conveyor 81. The inlet of the secondary screw conveyor 83 is connected to the outlet of the weighing hopper 82, and the outlet of the secondary screw conveyor 83 is connected to the flue gas scrubbing device 10 through a quaternary conveying pipe 9.

[0024] The working process of the powdered activated carbon addition system for flue gas treatment of this utility model is as follows: First, the vacuum generator 41 of the vacuum feeder 4 generates negative pressure, and the powdered activated carbon in the activated carbon ton bag 1 is sucked into the hopper 40 through the primary conveying pipe 3 and the suction pipe 2. The powdered activated carbon enters the activated carbon silo 6 through the discharge port 42 of the vacuum feeder 4 and the secondary conveying pipe 5 for storage. Then, it enters the weighing hopper 82 through the tertiary conveying pipe 7 and the primary screw conveyor 81 in sequence. The feed rate of the secondary screw conveyor 83 is controlled by the precision batching control system. Then, the activated carbon is transported to the flue gas scrubbing device 10 through the secondary screw conveyor 83 and the quaternary conveying pipe 9.

[0025] The above embodiments are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and should be defined by the claims.

Claims

1. A powdered activated carbon dosing system for flue gas treatment, separate from a lime dosing system, comprising activated carbon ton bags, a primary conveying pipe, a vacuum feeder, an activated carbon silo, and a discharge device; characterized in that, One end of the primary conveying pipe is inserted into the activated carbon ton bag via a suction pipe; The inlet of the vacuum feeder is connected to the other end of the primary conveying pipe; The inlet of the activated carbon silo is connected to the discharge port of the vacuum feeder via a secondary conveying pipe; The feeding equipment includes a primary screw conveyor, a weighing hopper, and a secondary screw conveyor connected in sequence; the inlet of the primary screw conveyor is connected to the outlet of the activated carbon silo via a tertiary conveying pipe; the inlet of the weighing hopper is connected to the outlet of the primary screw conveyor; the inlet of the secondary screw conveyor is connected to the outlet of the weighing hopper, and the outlet of the secondary screw conveyor is connected to the flue gas scrubbing device via a quaternary conveying pipe.

2. The powdered activated carbon dosing system for flue gas treatment according to claim 1, characterized in that, The vacuum feeder includes a hopper, a vacuum generator, and a filter; the inlet of the hopper is connected to the other end of the primary conveying pipe, the vacuum generator is installed on the top of the hopper, and the filter is installed inside the hopper.

3. The powdered activated carbon dosing system for flue gas treatment according to claim 1, characterized in that, A filter dust collector and a fan are installed sequentially on the top of the activated carbon silo.

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