TWM604666U - Reactivation equipment - Google Patents

Abstract

A reactivation equipment suitable for reactivating a deactivated denitration catalyst with a mixed solution containing carbon dioxide bubbles and a washing liquid including water. The reactivation equipment includes a cleaning device, a carbon dioxide gas supply device and a gas-liquid mixing device . The cleaning device includes a shell body and a partition used to separate the inner space of the shell body from the storage tank and the reaction tank. The gas-liquid mixing device is connected with the cleaning device and the carbon dioxide gas supply device and used for sending the mixed solution into the reaction tank of the cleaning device. The new reactivation equipment connects the cleaning device and the carbon dioxide gas supply device through the gas-liquid mixing device to prepare the mixed solution, which can effectively reactivate the deactivated denitration catalyst and reduce the production of the reactivation process The burden of waste liquid treatment.

Description

Reactivation equipment

This model relates to a catalyst reactivation equipment, in particular to a reactivation equipment for deactivated denitration catalyst.

Selective Catalytic Reduction (SCR) is a technology used to remove nitrogen oxides (NO _x ) in exhaust gas and reduce the nitrogen oxides to nitrogen and water. It is generally used in thermal power plants and boilers. The equipment is used to reduce the nitrogen oxide content in the exhaust gas to meet the exhaust gas emission standard. The selective catalytic reduction catalyst used in the selective catalytic reduction method (hereinafter referred to as SCR catalyst) is used for a long time, toxic substances and dust in the exhaust gas will be deposited on the surface of the SCR catalyst, making the SCR catalyst The activity of the medium decreases with the increase of use time, and finally the SCR catalyst is completely inactivated and can no longer be used.

U.S. Patent No. 7592283 B2 discloses a method for regenerating a honeycomb SCR catalyst using a bubble flow device, which uses a bubble flow device with one containing H ₂ SO ₄ , NH ₄ VO ₃ and 5(NH ₄ ) ₂ O· The mixture of 12WO ₃ ·5H ₂ O is used as a flowing substance and generates air bubbles with a size of 500 μm or less. The air bubbles are driven to remove the contaminants accumulated on the SCR catalyst to restore the activity of the SCR catalyst. However, in the US published patent, because the cleaning effect of air bubbles is limited, it is necessary to use H ₂ SO ₄ to remove the alkali metal compounds in the pollutants, causing the waste liquid obtained after cleaning to be discharged after additional treatment. .

Based on the above, how to make the reactivated SCR catalyst have high activity and make the reactivation method more environmentally friendly and economical are the goals that can be improved.

Therefore, the purpose of the present invention is to provide a reactivation device for activating deactivated denitration catalyst.

Therefore, the new reactivation equipment is suitable for reactivating a deactivated denitrification catalyst with a mixed solution containing carbon dioxide bubbles and a washing liquid including water. The reactivation equipment includes a cleaning device and a carbon dioxide gas supply. Device, and a gas-liquid mixing device.

The cleaning device includes a shell body and a partition plate located in the shell body and extending upward from the bottom of the shell body. The partition is used to separate the internal space of the shell body into a storage tank for accommodating the washing liquid, and a storage tank for accommodating the deactivated denitration catalyst and the mixed solution for the reactivation treatment In the reaction tank, when the mixed solution is too much, the top edge of the partition can overflow to the storage tank.

The gas-liquid mixing device is connected to the cleaning device and the carbon dioxide gas supply device and used to send the mixed solution into the reaction tank of the cleaning device, wherein the gas-liquid mixing device includes a device for supplying carbon dioxide gas from A mixing pump that mixes the carbon dioxide of the device and the washing liquid from the storage tank.

The effect of the present invention is that the reactivation equipment of the present invention connects the cleaning device and the carbon dioxide gas supply device through the gas-liquid mixing device to prepare the mixed solution, and can effectively reactivate the deactivated denitration catalyst, and It is possible to reduce the processing load of the waste liquid generated by the reactivation treatment.

As used herein, "denitration catalyst" generally refers to a catalyst generally used in selective catalytic reduction (SCR), such as, but not limited to, honeycomb SCR catalyst or flat SCR catalyst. "Deactivated denitrification catalyst" generally refers to denitrification catalysts that lose their activity or decrease their activity as the use time increases.

Referring to Figure 1, the first embodiment of the new reactivation equipment is suitable for reactivating an inactivated denitration catalyst with a mixed solution containing carbon dioxide bubbles and a washing liquid including water. The equipment includes a cleaning device 1, a carbon dioxide gas supply device 2, and a gas-liquid mixing device 3.

The cleaning device 1 includes a shell body 11 and a partition plate 12 located in the shell body 11 and extending upward from the bottom of the shell body 11. The partition 12 is used to separate the internal space of the shell body 11 into a storage tank 13 for containing the washing liquid, and a storage tank 13 for containing the deactivated denitrification catalyst (not shown) and the mixing Solution to the reaction tank 14 for this reactivation treatment. The storage tank 13 has an inlet 131 and a drain 132 for the water to be injected. The cleaning device 1 also includes an overflow port 15 defined by the shell body 11 and the top end of the partition plate 12 and located at the top of the reaction tank 14. The overflow port 15 is used for the The mixed solution and the contaminants detached from the surface of the deactivated denitration catalyst after the reactivation treatment pass and overflow from the top edge of the partition 12 to the storage tank 13, so that the excessive mixed solution is recovered and combined It is mixed with the washing liquid and can be recycled and reused, and the pollutants overflowing to the storage tank 13 will be suspended on the liquid surface of the washing liquid to facilitate subsequent removal of pollutants. After the reactivation treatment is completed, the washing liquid in the storage tank 13 is discharged from the drain port 132 to a waste liquid treatment device (not shown) for subsequent waste liquid treatment operations.

It should be noted that during the reactivation treatment, the mixed solution uses carbon dioxide bubbles to remove contaminants attached to the surface of the inactivated denitration catalyst by means of bubble bursting, and the mixed solution can also The weak acidity of carbon dioxide assists in the removal of alkali metal compounds in pollutants.

The carbon dioxide gas supply device 2 is used to supply carbon dioxide gas.

The gas-liquid mixing device 3 is connected with the cleaning device 1 and the carbon dioxide gas supply device 2 to form the mixed solution and send it to the reaction tank 14 of the cleaning device 1. The gas-liquid mixing device 3 includes a mixing pump 31 and a pressurizer 32. The mixing pump 31 is used to mix the carbon dioxide from the carbon dioxide gas supply device 2 and the washing liquid from the storage tank 13. Wherein, the mixing pump 31 has a mixing chamber 311 communicating with the storage tank 13 and the carbon dioxide gas supply device 2.

The pressurizer 32 is located between the mixing pump 31 and the cleaning device 1, and is used to perform pressurization treatment after mixing the carbon dioxide gas with the cleaning liquid to obtain the mixed solution, and send the mixed solution to the cleaning In the reaction tank 14 of the device 1. The pressurizer 32 has a pressurizing tank 321 and a control valve 322 for controlling the pressure in the pressurizing tank 321.

In an operating mode of the reactivation device of the present invention, the scrubbing liquid discharged from the storage tank 13 and the carbon dioxide gas from the carbon dioxide gas supply device 2 are mixed in the mixing chamber 311 and then flow to the pressurizer 32 in the pressurized tank 321, the pressure in the pressurized tank 321 is controlled by the control valve 322 to perform the pressurization process, which can further control the size of the carbon dioxide bubbles in the mixed solution formed, and then make the mixing The solution has a better cleaning effect on the deactivated denitration catalyst.

In another operating mode of the reactivation device of the present invention, when the scrubbing liquid and the carbon dioxide gas are mixed in the mixing chamber 311 and then flow into the pressurizing tank 321 of the pressurizer 32, they may not pass through the The control valve 322 controls the pressure in the pressurization tank 321 to directly flow into the reaction tank 14, that is, the size of the carbon dioxide bubbles in the mixed solution formed is not regulated by the pressurization process. In addition, in this mode of operation, the reactivation device of the present invention may also include a pipeline (not shown) connected between the mixing chamber 311 and the reaction tank 14, and the washing liquid And the carbon dioxide gas is mixed in the mixing chamber 311 and then directly flows into the reaction tank 14.

Referring to Figure 2, the second embodiment of the reactivation equipment of the present invention, the reactivation equipment also includes an ultrasonic oscillation device 4 connected with the cleaning device 1, the ultrasonic oscillation device 5 includes a set of ultrasonic A high-power ultrasonic host 41, and an oscillating member 42 arranged in the reaction tank 14 of the shell body 11 and used for receiving a signal from the ultrasonic host 41 to generate vibration.

When performing the reactivation treatment of the deactivated denitrification catalyst in the second embodiment, after the mixed solution is injected into the reaction tank 14, the ultrasonic host 41 activates the oscillating member 42 to deactivate the denitrification catalyst. The nitrate catalyst can be cleaned under the environment of ultrasonic vibration, so that the contaminants attached to the surface of the deactivated denitration catalyst are more easily eluted, and the denitration catalyst activity after reactivation is improved.

In summary, the reactivation device of the present invention connects the cleaning device 1 and the carbon dioxide gas supply device 2 through the gas-liquid mixing device 3, so that the washing liquid and carbon dioxide can be mixed to form the mixed solution, which can effectively make the The live denitration catalyst is reactivated to obtain a reactivated denitration catalyst with better denitration efficiency, and can reduce the processing burden of the waste liquid generated by the reactivation treatment. Therefore, it can indeed achieve the purpose of cost-new type.

However, the above-mentioned are only examples of the present model, and should not be used to limit the scope of implementation of the present model, all simple equivalent changes and modifications made in accordance with the patent scope of the present model application and the contents of the patent specification still belong to This new patent covers the scope.

1: Cleaning device 11: Shell body 12: Partition 13: storage tank 131: Inlet 132: Drain 14: reaction tank 15: Overflow port 2: Carbon dioxide gas supply device 3: Gas-liquid mixing device 31: Hybrid pump 311: mixing room 32: pressurizer 321: Pressure tank 322: control valve 4: Ultrasonic oscillator 41: Ultrasonic host 42: Oscillating parts

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a schematic diagram illustrating the first implementation aspect of the new reactivation device; and Figure 2 is a schematic diagram illustrating the second embodiment of the new reactivation device.

1: Cleaning device

11: Shell body

12: Partition

13: storage tank

131: Inlet

132: Drain

14: reaction tank

15: Overflow port

2: Carbon dioxide gas supply device

3: Gas-liquid mixing device

31: Hybrid pump

311: mixing room

32: pressurizer

321: Pressure tank

322: control valve

Claims (4)

A reactivation device is suitable for reactivating an inactivated denitrification catalyst with a mixed solution containing carbon dioxide bubbles and a washing liquid including water. The reactivation device includes: A cleaning device includes a shell body, and a partition plate located in the shell body and extending upward from the bottom of the shell body. The partition plate is used to partition the inner space of the shell body to contain the washing liquid A storage tank for containing the deactivated denitration catalyst and the mixed solution for the reactivation treatment. When the mixed solution is too much, the top edge of the partition can overflow to the storage tank ； A carbon dioxide gas supply device; and A gas-liquid mixing device connected to the cleaning device and the carbon dioxide gas supply device and used to send the mixed solution into the reaction tank of the cleaning device, wherein the gas-liquid mixing device includes a device for supplying carbon dioxide gas from A mixing pump that mixes the carbon dioxide of the device and the washing liquid from the storage tank. According to the reactivation equipment of claim 1, the gas-liquid mixing device further includes a pressurizer located between the mixing pump and the cleaning device for pressurizing treatment after the carbon dioxide gas is mixed with the cleaning liquid The mixed solution is obtained, and the mixed solution is sent to the reaction tank of the cleaning device. The reactivation device according to claim 1, further comprising an ultrasonic oscillation device connected to the cleaning device, the ultrasonic oscillation device including an ultrasonic main body for setting the ultrasonic power, and an ultrasonic main body arranged on the casing body In the reaction tank and used to receive the signal from the ultrasonic host to generate vibration. The reactivation device according to claim 1, wherein the housing body of the cleaning device cooperates with the top of the partition to define an overflow at the top of the reaction tank.

Images