CN107930324A - Device and method for adsorption and purification treatment of viscous or wet dusty flue gas - Google Patents

Abstract

The invention relates to a device and a method for carrying out adsorption purification treatment on sticky or wet dust-containing flue gas, wherein the device comprises an adsorbent storage unit, a flue gas purification unit, a pipeline unit, an adsorbent conveying unit, an air pressure balancing unit, a fan unit, a chimney and a control unit, the bottom of the adsorbent storage unit is connected with the adsorbent conveying unit, a feeding port of the adsorbent conveying unit is connected with the pipeline unit at the inlet of the flue gas purification unit, and the outlet of the flue gas purification unit, the fan unit and the chimney are connected through the pipeline unit; the top of the adsorbent storage unit is provided with an air pressure balancing unit, and the other end of the air pressure balancing unit is connected with a pipeline unit at the inlet of the flue gas purification unit; the control unit controls the whole adsorption and purification process. Compared with the prior art, the invention has the beneficial effects that: the device and the method have good purifying effect on the sticky or wet dust-containing smoke, and have the characteristics of low investment cost, simple structure, high purifying efficiency, long service life and the like.

Description

Device and method for adsorption and purification treatment of viscous or wet dusty flue gas

technical field

The invention relates to the field of flue gas dust removal, in particular to a device and method for adsorption and purification treatment of viscous or wet dust-containing flue gas.

Background technique

The flue gas discharged from the coke oven production process contains tar and other viscous substances. If the tar substances in the flue gas are not treated and directly enter the bag filter, it will inevitably cause sticky bags, which will damage the filter bag and affect the normal operation of the dust collector. . In the previous technology, the combustion + water washing method was often used for treatment, but this treatment method has disadvantages such as high energy consumption, large water consumption, and secondary pollution, especially for the implementation of the existing coke oven coal charging flue gas purification. Difficult; in addition, the flue gas during the commissioning stage of equipment in the waste incineration industry often has relatively high moisture content and low flue temperature. If the wet flue gas is not treated and directly enters the bag filter, it will also cause sticky bags and bag damage. Thus affecting the normal operation of the equipment. In the previous technology, debugging cloth bags were often used to replace them, and the working filter bags were replaced after the equipment was put into production. However, this method has the disadvantages of wasting resources, high cost, and increasing the workload of replacing filter bags.

Contents of the invention

The object of the present invention is to provide a device and method for adsorption and purification treatment of viscous or wet dust-containing flue gas. The device and method have good purification effect on viscous or wet dust-containing flue gas, and the device has a long service life.

In order to achieve the above object, the present invention adopts the following technical solutions to realize:

A device for adsorption and purification of viscous or wet dust-containing flue gas, including an adsorbent storage unit, a flue gas purification unit, a pipeline unit, an adsorbent delivery unit, an air pressure balance unit, a fan unit, a chimney, the bottom of the adsorbent storage unit and the adsorption The feed port of the adsorbent delivery unit is connected to the pipeline unit at the entrance of the flue gas purification unit, and the outlet of the flue gas purification unit, the fan unit, and the chimney are connected through the pipeline unit; the top of the adsorbent storage unit is equipped with an air pressure balance Unit, the other end of the air pressure balance unit is connected to the pipe unit at the inlet of the flue gas purification unit.

The adsorbent storage unit includes a silo, a suspender, an injector, a gate valve, a star-shaped ash unloading valve, and a metering feeder. The outlet of the silo is connected to the gate valve, the star dust discharge valve, the metering feeder, and the ejector in turn. The injection power of the ejector comes from the fan or compressed air, and the suspension is also connected to the fan or compressed air source.

The injector is a Venturi tube structure.

The suspender includes an annular pipe and a short pipe, the annular pipe is arranged around the silo, and several short pipes are evenly arranged on the inner ring of the annular pipe, and the short pipe communicates with the silo.

The blower is a Roots blower.

The feed port of the adsorbent delivery unit includes a main pipe and a short feeding pipe, the main pipe surrounds the pipe unit at the entrance of the flue gas purification unit, and a plurality of short feeding pipes and pipes at the entrance of the flue gas purification unit are arranged inside the main pipe The units are connected, and the short distribution and feeding pipes are radially inclined to the pipeline unit, and the inclination directions of all the distribution and feeding short pipes are consistent.

The feed port of the adsorbent delivery unit is connected to the pipeline unit at the inlet of the flue gas purification unit, where the pipeline unit has a Venturi tube structure.

The flue gas purification unit uses a filter bag to filter.

A method for adsorption and purification of flue gas, which uses adsorption and bag purification to adsorb and purify viscous or wet dust-containing flue gas. When the signal is received, the adsorbent storage unit and fan unit are turned on; Roots blower or compressed air starts to work, and the suspender suspends the adsorbent in the silo to form a more uniformly dispersed medium; the air pressure balance unit effectively balances the pressure to ensure that the adsorbent passes through the plugboard smoothly The valve, star-shaped ash unloading valve, and metering feeder enter the ejector, and are driven by the Roots blower or compressed air to enter the pipeline unit at the entrance of the flue gas purification unit through the adsorbent delivery unit, and reach the flue gas purification unit first. The outer surface of the filter bag is pre-sprayed. On this basis, it can be evenly mixed with the flue gas, effectively remove sticky dust and wet dust, and ensure the long-term stability and high efficiency of the filter bag.

Compared with prior art, the beneficial effect of the present invention is:

The present invention can not only effectively purify viscous or wet dust-containing flue gas, but also has the advantages of simple equipment, less investment, and convenient equipment maintenance. The specific description is as follows:

1) The structure of the annular suspender arranged at the cone bucket of the silo makes the adsorbent in the silo suspended when the adsorbent feeding is started, ensuring that the adsorbent is not compacted and the feeding is smooth;

2) The combination of star-shaped ash unloading valve and quantitative screw feeder ensures accurate feeding and has the function of airtight and air-tight;

3) The Venturi tube injector has a simple structure and is durable, which is conducive to the feeding of the adsorbent;

4) The circular structure of the feeding port ensures that the adsorbent and the flue gas can be mixed quickly and evenly, which improves the removal rate of viscous substances and wet dust in the flue gas, and prolongs the service life of the filter bag;

5) The air pressure balance unit effectively balances the pressure of the adsorbent feeding process to ensure the smooth feeding of the adsorbent;

6) The pipe unit at the feeding port is made into a Venturi tube structure so that the velocity of the flue gas increases when it passes through the throat, resulting in highly turbulent flow and gas-solid mixing to ensure that the adsorbent is fully mixed with the flue gas;

7) Roots blower or compressed air is used as the delivery power to ensure the smooth delivery of the adsorbent to the pipeline unit;

8) The flue gas purification unit adopts the structural form of multiple air inlet and outlet manifolds with valves, which is conducive to the uniform distribution of gas flow and the reduction of pressure loss;

9) The fan unit adopts the structural form of frequency conversion or coupler speed regulation, which is conducive to resource saving and environmental protection.

Description of drawings

Figure 1 is a schematic structural view of the device for adsorption and purification of viscous or wet dust-containing flue gas according to the present invention.

Fig. 2 is a structural schematic diagram of the feeding port of the adsorbent delivery unit in the present invention.

In the figure: 1-adsorbent storage unit; 2-flue gas purification unit; 3-pipeline unit; 4-adsorbent delivery unit; 5-air pressure balance unit; 6-fan unit; 7-chimney; 8-control unit; 9 -Storage bin; 10-suspension device; 11-ejector; 12-flap valve; 13-star ash discharge valve; 14-metering feeder; 15-feeding port; 16-feeding port; 18-distribute the short pipe for feeding.

Detailed ways

The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

See Figure 1-2, the device for adsorption and purification of viscous or wet dust-containing flue gas, including adsorbent storage unit 1, flue gas purification unit 2, pipeline unit 3, adsorbent delivery unit 4, air pressure balance unit 5, Fan unit 6, chimney 7, control unit 8, the bottom of the adsorbent storage unit 1 is connected to the adsorbent delivery unit 4, the feed port 16 of the adsorbent delivery unit 4 is connected to the pipeline unit 3 at the entrance of the flue gas purification unit 2, and the flue gas The outlet of the purification unit 2, the fan unit 6, and the chimney 7 are connected through the pipeline unit 3; the top of the adsorbent storage unit 1 is provided with an air pressure balance unit 5, and the other end of the air pressure balance unit 5 is connected to the pipeline unit 3 at the entrance of the flue gas purification unit 2 ; The control unit 8 controls the entire adsorption purification process.

The adsorbent storage unit 1 includes a silo 9, a suspender 10, an injector 11, a gate valve 12, a star-shaped ash discharge valve 13, and a metering feeder 14. The top of the silo 9 is provided with a feed port 15, A suspender 10 is provided at the cone bucket at the lower part of the silo 9, and the outlet of the silo 9 is sequentially connected with a gate valve 12, a star-shaped ash discharge valve 13, a metering feeder 14, and an injector 11. The injection power source of the injector 11 is For fans or compressed air, the levitator 10 is also connected to a source of fans or compressed air. The flapper valve 12 is only used for maintenance of the adsorbent storage unit, and is in an open state under normal working conditions.

The injector 11 is a Venturi tube structure. Both the injector 11 and the adsorbent delivery unit 4 are lined with wear-resistant materials.

The suspender 10 includes an annular pipe and a short pipe. The annular pipe is arranged around the silo 9. Several short pipes are evenly arranged on the inner ring of the annular pipe. The short pipes communicate with the silo 9. The annular pipe is connected to a fan or compressed air. source.

The blower is a Roots blower.

The feed port 16 of the adsorbent delivery unit 4 includes a main pipe 17 and a short delivery pipe 18. The main pipe 17 surrounds the pipe unit 3 at the entrance of the flue gas purification unit 2. A plurality of short pipes 18 are arranged inside the main pipe 17 It communicates with the pipeline unit 3 at the entrance of the flue gas purification unit 2, and the distribution short pipe 18 is radially inclined to the pipeline unit 3, and the inclination direction of all the distribution short pipes 18 is the same.

The feed port 16 of the adsorbent delivery unit 4 is connected to the pipeline unit 3 at the entrance of the flue gas purification unit 2, where the pipeline unit 3 has a Venturi tube structure. The main pipe 17 can be wound around the piping unit 3 of the Venturi tube in a circular structure; it can also be wound around the piping unit 3 of the Venturi tube in a spiral structure, and the helical direction and the inclination of the distribution short pipe 18 The square shape is consistent with the flue gas flow direction, forming a high-speed swirl wind, which can promote the flue gas flow and speed up the uniform mixing of the adsorbent and the flue gas.

The flue gas purification unit 2 uses a filter bag to filter. The air inlet and outlet collection pipe of the flue gas purification unit 2 is provided with multiple inlet and outlet outlets with valves connected to each bag dust removal unit, which can individually control the wind pressure of each bag dust removal unit, effectively controlling the uniform distribution of air flow and stabilizing the flow field.

A method for adsorption and purification of flue gas, which uses adsorption and bag purification to adsorb and purify viscous or wet dust-containing flue gas. After receiving the signal, the adsorbent storage unit 1 and the fan unit 6 are turned on; the Roots blower or compressed air starts to work, and the suspender 10 suspends the adsorbent in the silo 9 to form a more uniformly dispersed medium; the air pressure balance unit 5 effectively balances the pressure to ensure The adsorbent enters the ejector 11 smoothly through the gate valve 12, the star unloading valve 13, and the metering feeder 14, and enters the entrance of the flue gas purification unit 2 through the adsorbent delivery unit 4 driven by the Roots blower or compressed air. In the pipeline unit 3, it will first reach the flue gas purification unit 2 to realize pre-spraying on the outer surface of the filter bag. On this basis, it can evenly mix with the flue gas, effectively remove sticky dust and wet dust, and ensure long-term stability and high efficiency of the filter bag.

The adsorbent storage unit 1 adopts an adsorbent with relatively high activity, such as activated carbon powder, slaked lime powder, diatomaceous earth and the like. When this method is applied to the coke oven coal charging dust removal and purification system, the coke powder collected during coke discharge or CDQ and coke treatment and dust removal is usually used.

When the viscous dust increases or the humidity in the flue gas increases during the coal loading process, quantitative feeding can be realized through the star-shaped ash unloading valve 13 and the metering screw feeder 14, while effectively ensuring airtight sealing.

The structure of the venturi-type injector 11 ensures that the adsorbent is unobstructed and not easily blocked.

The structural form of the feeding port 16 is arranged in a ring and the structural form of the pipeline unit 3 here is made of a Venturi tube to ensure that the adsorbent and the flue gas are fully and uniformly mixed and the removal efficiency is improved.

The flue gas purification unit 2 is made into a plurality of air inlet and outlet collection pipes, which is conducive to the uniform distribution of gas flow and the stability of the flow field.

The fan unit 6 can realize speed regulation, which can effectively save energy.

The present invention is a device and method for adsorbing and purifying viscous or wet dust-containing flue gas, which has the characteristics of low investment cost, simple structure, high purification efficiency, long service life, etc., and can handle viscous or wet dust well. smoke.

Claims (9)

1. A device for adsorption and purification of viscous or wet dust-containing flue gas, characterized in that it includes an adsorbent storage unit, a flue gas purification unit, a pipeline unit, an adsorbent delivery unit, an air pressure balance unit, a fan unit, a chimney, and an adsorption The bottom of the agent storage unit is connected to the adsorbent delivery unit, the feed port of the adsorbent delivery unit is connected to the pipe unit at the entrance of the flue gas purification unit, and the outlet of the flue gas purification unit, the fan unit, and the chimney are connected through the pipe unit; the adsorbent storage unit An air pressure balance unit is arranged on the top of the unit, and the other end of the air pressure balance unit is connected to the pipeline unit at the entrance of the flue gas purification unit. 2. The device for adsorbing and purifying viscous or wet dust-containing flue gas according to claim 1, wherein the adsorbent storage unit includes a silo, a suspender, an injector, a gate valve, a star-shaped Ash unloading valve, metering feeder, the top of the silo is equipped with a feed inlet, the lower part of the silo is equipped with a suspender, and the outlet of the silo is connected to the gate valve, star-shaped ash unloading valve, metering feeder, The ejector is powered by a fan or compressed air, and the suspension is also connected to a fan or compressed air source. 3. The device for adsorbing and purifying viscous or wet dust-containing flue gas according to claim 2, characterized in that the injector is a Venturi tube structure. 4. The device for adsorption and purification treatment of viscous or wet dust-containing flue gas according to claim 2, characterized in that, the suspender includes an annular pipe and a short pipe, and the annular pipe is arranged around the silo, and at the center of the annular pipe Several short pipes are evenly arranged in the inner ring, and the short pipes communicate with the silo. 5. The device for adsorption and purification treatment of viscous or wet dusty flue gas according to claim 2, characterized in that the fan is a Roots fan. 6. The device for adsorption and purification treatment of viscous or wet dust-containing flue gas according to claim 1, wherein the feed port of the adsorbent delivery unit includes a main pipe and a short pipe for distributing materials, and the main pipe is surrounded by the flue gas On the pipe unit at the entrance of the purification unit, a plurality of short feeding pipes are arranged on the inner side of the main pipe to communicate with the pipe unit at the entrance of the flue gas purification unit. The inclination directions of the short feeding pipes are consistent. 7. The device for adsorption and purification treatment of viscous or wet dust-containing flue gas according to claim 1, wherein the feed port of the adsorbent delivery unit is connected to the pipeline unit at the entrance of the flue gas purification unit, the The piping unit at is a Venturi tube structure. 8 . The device for adsorbing and purifying viscous or wet dusty flue gas according to claim 1 , wherein the flue gas purification unit uses a filter bag for filtration. 9. The method for adsorption and purification of flue gas by using the device according to any one of claims 1-8, characterized in that the method adopts adsorption and bag purification to carry out adsorption and purification treatment for viscous or wet dust-containing flue gas , when the coke oven starts to charge coal or the equipment debugging of the waste incineration plant starts, the control unit receives a signal to turn on the adsorbent storage unit and the fan unit; the Roots blower or compressed air starts to work, and the suspender suspends the adsorbent in the silo to form More uniformly dispersed medium; the air pressure balance unit effectively balances the pressure to ensure that the adsorbent smoothly passes through the gate valve, star unloading valve, and metering feeder into the ejector, and is driven by the Roots blower or compressed air through the adsorbent delivery unit It enters the pipeline unit at the entrance of the flue gas purification unit, and first reaches the flue gas purification unit to realize pre-spraying on the outer surface of the filter bag. Long-term stability and high efficiency.