Dehumidification and ammonia removal device in desulfurization and denitrification waste gas collection process

Abstract

The utility model relates to the field of flue gas treatment, in particular to a dehumidification and ammonia removal device in a desulfurization and denitrification waste gas collection process, which comprises an acquisition probe connected with a flue gas dehumidification and ammonia removal system, the flue gas dehumidification and ammonia removal system is connected with a CEMS (continuous emission monitoring system), the CEMS is connected with an air compressor, the air compressor is connected with an oil-water separator, and the oil-water separator is connected with the flue gas dehumidification and ammonia removal system. The smoke dehumidification and ammonia removal system comprises a filtering system, the filtering system is connected with a dew-point meter, the dew-point meter is connected with a one-way valve, the one-way valve is connected with a first tee joint, the first tee joint is connected with a CEMS system, the other end of the first tee joint is connected with a three-way valve of the filtering system, and a fourth tee joint of the filtering system is connected with a jet pump through a third tee joint. According to the device, moisture, acid mist and ammonia gas in the flue gas are effectively removed, ammonia salt crystallization and pipeline corrosion are reduced, and measured data of a CEMS online system are real and stable. The system can regularly perform back flushing on the pipeline, discharge water in the pipeline and adsorb ammonium salt crystals.

Description

Technical Field

[0001] This utility model relates to the field of flue gas treatment technology, specifically a dehumidification and ammonia removal device for the collection process of desulfurization and denitrification waste gas. Background Technology

[0002] The oil furnace carbon black production process involves the incomplete combustion and high-temperature cracking of hydrocarbon feedstock oil. The main product is carbon black, and the byproduct is low-calorific-value carbon black tail gas. This tail gas is typically used as fuel in the carbon black company's self-owned power plant. It is then sent to the waste heat boiler in the power workshop for combustion. The steam produced after combustion is used for turbine power generation. The remaining exhaust gas undergoes SCR treatment before entering a desulfurization and denitrification tower for sulfur and dust reduction. After being monitored by a real-time online CEMS monitoring system and meeting emission standards, it is released into the atmosphere.

[0003] The CEMS system is a continuous emission monitoring device for flue gas, monitoring the concentrations of particulate matter, sulfur dioxide, and nitrogen oxides in flue gas. Typically, the flue gas to be monitored is fed into the CEMS system; however, the flue gas contains large amounts of water vapor and ammonia, which can damage pipelines and equipment, leading to distorted monitoring data. Utility Model Content

[0004] This utility model provides a dehumidification and ammonia removal device for the collection process of desulfurization and denitrification waste gas, including a sampling probe connected to a flue gas dehumidification and ammonia removal system, the flue gas dehumidification and ammonia removal system connected to a CEMS system, the CEMS system connected to an air compressor, the air compressor connected to an oil-water separator, and the oil-water separator connected to the flue gas dehumidification and ammonia removal system.

[0005] Preferably, the flue gas dehumidification and ammonia removal system includes a filtration system, the filtration system is connected to a dew point meter, the dew point meter is connected to a one-way valve, the one-way valve is connected to a first three-way valve, the first three-way valve is connected to a CEMS system, the other end of the first three-way valve is connected to a three-way valve of the filtration system, and the fourth three-way valve of the filtration system is connected to a jet pump through a third three-way valve.

[0006] Preferably, the oil-water separator is connected to a second three-way valve, which is connected to a regenerative non-heated dryer. The regenerative non-heated dryer is connected to a compressed air membrane dryer. The compressed air membrane dryer is connected to a flow meter, which is connected to a hollow fiber membrane gas dryer. The hollow fiber membrane gas dryer is connected to a vacuum gauge, which is connected to the third three-way valve. The second three-way valve is connected to a pressure reducing valve, which is connected to a jet pump.

[0007] Preferably, the filtration system includes an extractable hygrometer connected to a three-way valve, which is connected to a condensing filter. The condensing filter is connected to a first ammonia remover, which is connected to a second ammonia remover. The second ammonia remover is connected to an acid mist remover, which is connected to a hollow fiber membrane gas dryer.

[0008] Preferably, the fourth three-way valve is connected to the second drain solenoid valve and the first drain solenoid valve, the second drain solenoid valve is connected to the coagulation filter, and the first drain solenoid valve is connected to the acid mist remover.

[0009] Preferably, the filtration system is integrated into a constant temperature chamber.

[0010] Gain Effect: A dehumidification and ammonia removal device in the desulfurization and denitrification waste gas collection process effectively removes moisture, acid mist, and ammonia from the flue gas while retaining the target gases (e.g., SO2, NOx, O2), reducing ammonia salt crystallization and pipeline corrosion, thus ensuring accurate and stable measurement data from the CEMS online system. The system can periodically backflush the pipelines to remove moisture and adsorbed ammonium salt crystals. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 Schematic diagram of the flue gas dehumidification and ammonia removal system of this utility model;

[0014] Figure label:

[0015] The system includes: a sampling probe 100, a flue gas dehumidification and ammonia removal system 200, a CEMS system 300, an air compressor 400, an oil-water separator 500, a filtration system 1, an extraction humidity meter 2, a three-way valve 3, a condensing filter 4, a first ammonia remover 5, a second ammonia remover 6, a first drain solenoid valve 7, an acid mist remover 8, a hollow fiber membrane gas dryer 9, a dew point meter 10, a one-way valve 11, a first three-way valve 12, a flow meter 13, a vacuum gauge 14, a compressed air membrane dryer 15, a regenerative non-heated dryer 16, a second three-way valve 17, a pressure reducing valve 18, a jet pump 19, a third three-way valve 20, a fourth three-way valve 21, and a second drain solenoid valve 22. Detailed Implementation

[0016] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0017] This utility model provides the following embodiment: a dehumidification and ammonia removal device for the collection process of desulfurization and denitrification waste gas, including a sampling probe 100 connected to a flue gas dehumidification and ammonia removal system 200, the flue gas dehumidification and ammonia removal system 200 connected to a CEMS system 300, the CEMS system 300 connected to an air compressor 400, the air compressor 400 connected to an oil-water separator 500, and the oil-water separator 500 connected to the flue gas dehumidification and ammonia removal system 200;

[0018] The flue gas dehumidification and ammonia removal system 200 includes a filtration system 1, which is connected to a dew point meter 10. The dew point meter 10 is connected to a one-way valve 11, which is connected to a first three-way valve 12. The first three-way valve 12 is connected to a CEMS system 300, and the other end of the first three-way valve 12 is connected to a three-way valve 3 of the filtration system 1. The fourth three-way valve 21 of the filtration system 1 is connected to a jet pump 19 through a third three-way valve 20.

[0019] The oil-water separator 500 is connected to a second three-way valve 17, which in turn connects to a regenerable non-heated dryer 16. The regenerable non-heated dryer 16 is connected to a compressed air membrane dryer 15, which is connected to a flow meter 13. The flow meter 13 is connected to a hollow fiber membrane gas dryer 9, which is connected to a vacuum gauge 14. The vacuum gauge 14 is connected to a third three-way valve 20. The second three-way valve 17 is connected to a pressure reducing valve 18, which is connected to a jet pump 19. This allows dried air to be delivered to the outer pipe of the hollow fiber membrane gas dryer 9. If the pressure in the pipe is too high, opening the pressure reducing valve 18 will release the excess air.

[0020] The filtration system 1 includes an extractable humidifier 2, which is connected to a three-way valve 3. The three-way valve 3 is connected to a condensing filter 4, which is connected to a first ammonia remover 5. The first ammonia remover 5 is connected to a second ammonia remover 6, which is connected to an acid mist remover 8, and the acid mist remover 8 is connected to a hollow fiber membrane gas dryer 9.

[0021] The fourth three-way valve 21 is connected to the second drain solenoid valve 22 and the first drain solenoid valve 7 respectively. The second drain solenoid valve 22 is connected to the coagulation filter 4, and the first drain solenoid valve 7 is connected to the acid mist remover 8.

[0022] The filtration system 1 is integrated into a constant temperature chamber, where the temperature is higher than that of the flue gas, ensuring that no condensate is formed during the entire pretreatment process.

[0023] The coagulation filter 4 has a filter element made of silica borate and PTFE composite material, which can remove droplets and particles with a diameter of less than 0.1um with an efficiency of over 95%.

[0024] The ammonia remover reacts with ammonia gas using a high-temperature resistant solid phosphoric acid compound to generate ammonium phosphate, thus removing the ammonia gas. This reaction is highly selective and does not cause any loss to the target gas being tested.

[0025] Acid mist remover 8 removes acid mist and protects hollow fiber membrane gas dryer 9.

[0026] The gaseous dehumidification function is achieved through a hollow fiber membrane gas dryer 9, which consists of an inner tube and an outer tube. The inner tube carries the sample gas, while the outer tube carries the drying backflushing gas. The inner tube wall material has a strong affinity for water molecules, allowing them to pass freely. Under the influence of the moisture concentration difference between the inner and outer tubes, water molecules in the inner tube diffuse to the outer tube and are carried away by the backflushing gas, while the target gas molecules are trapped in the inner tube, thus achieving the drying of the sample gas.

[0027] Dew point meter 10 can monitor the dew point of dried sample gas, regenerable non-heated dryer 16 can dry compressed air, and compressed air membrane dryer 15 can dry backflush gas.

[0028] Stop the flue gas supply, operate the three-way valve 3, and the air compressor 400 intermittently delivers gas to the CEMS system 300 through the first three-way valve 12 to the three-way valve 3 to purge the filter system 1 until it returns to the CEMS system 300. The water in the pipeline that was purged out is discharged in the CEMS system 300, and the ammonium salt crystals adhere to the filter element of the CEMS system 300.

[0029] The function of the three-way valve is to control the backflush gas, and to periodically backflush the pipeline to remove moisture and ammonium salt crystals.

[0030] The advantages of this invention are as follows: A dehumidification and ammonia removal device for the collection of desulfurization and denitrification waste gas effectively removes moisture, acid mist, and ammonia from the flue gas while retaining the target gas (e.g., SO2, NOx, O2), reducing ammonia salt crystallization and pipeline corrosion, thus ensuring accurate and stable measurement data from the CEMS online system. The system can periodically backflush the pipeline to remove moisture and adsorbed ammonium salt crystals.

[0031] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A dehumidification and ammonia removal device for the collection process of desulfurization and denitrification waste gas, characterized in that, The collecting probe is connected with a flue gas dehumidification and ammonia removal system, the flue gas dehumidification and ammonia removal system is connected with a CEMS system, the CEMS system is connected with an air compressor, the air compressor is connected with an oil-water separator, and the oil-water separator is connected with the flue gas dehumidification and ammonia removal system. The flue gas dehumidification and ammonia removal system comprises a filtering system, the filtering system is connected with a dew point instrument, the dew point instrument is connected with a one-way valve, the one-way valve is connected with a first three-way pipe, the first three-way pipe is connected with the CEMS system, the first three-way pipe is connected with a three-way valve of the filtering system at the other end, and a fourth three-way pipe of the filtering system is connected with a jet pump through a third three-way pipe.

2. A device for dehumidification and deamination in a desulfurization and denitrification exhaust gas collection process according to claim 1, characterized in that, The oil-water separator is connected with a second three-way pipe, the second three-way pipe is connected with a renewable non-heating dryer, the renewable non-heating dryer is connected with a compressed air membrane dryer, the compressed air membrane dryer is connected with a flow meter, the flow meter is connected with a hollow fiber membrane gas dryer, the hollow fiber membrane gas dryer is connected with a vacuum gauge, the vacuum gauge is connected with the third three-way pipe, the second three-way pipe is connected with a pressure reducing valve, and the pressure reducing valve is connected with the jet pump.

3. A device for dehumidification and deamination in a desulfurization and denitrification exhaust gas collection process according to claim 1, characterized in that, The filtering system comprises a removable humidity meter, the removable humidity meter is connected with a three-way valve, the three-way valve is connected with a coagulation filter, the coagulation filter is connected with a first ammonia gas remover, the first ammonia gas remover is connected with a second ammonia gas remover, the second ammonia gas remover is connected with an acid mist remover, and the acid mist remover is connected with the hollow fiber membrane gas dryer.

4. A device for dehumidification and deamination in a desulfurization and denitrification exhaust gas collection process according to claim 1, characterized in that, The fourth three-way pipe is connected with a second liquid discharge electromagnetic valve and a first liquid discharge electromagnetic valve respectively, the second liquid discharge electromagnetic valve is connected with the coagulation filter, and the first liquid discharge electromagnetic valve is connected with the acid mist remover.

5. A device for dehumidification and deamination in a desulfurization and denitrification exhaust gas collection process according to claim 1, characterized in that, The filtering system is integrated in a thermostat.

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