Medical solid waste incineration flue gas treatment system

Abstract

The utility model relates to the field of chemical production, and provides a medical solid waste incineration flue gas treatment system. Comprising a treatment system and a dosing system, wherein the treatment system comprises a semi-dry quench tower, a dry reaction tower, a cloth bag dust removal device, a spray washing tower, an absorption tower and a chimney; the dosing system comprises an activated carbon storage tank and a slaked lime storage tank, unloaders are respectively mounted at the bottoms of the activated carbon storage tank and the slaked lime storage tank, the unloaders are communicated with a dosing pipeline, a Roots blower is mounted at one end of the dosing pipeline, and the other end of the dosing pipeline is communicated with the middle of the dry reaction tower. Carrying out a neutralization reaction with acidic substances in the flue gas through a semi-dry quench tower, and controlling the temperature; and the tail gas is further purified through the dry reaction tower. According to the technical scheme, the flue gas can be fully and effectively treated, and the treated flue gas reaches the emission standard.

Description

Technical Field

[0001] The utility model relates to the field of chemical production, and in particular to a pharmaceutical solid waste incineration flue gas treatment system. Background Art

[0002] Toxic and hazardous waste generated during the pharmaceutical production process is usually treated by incineration. A large amount of flue gas will be generated during the incineration process. The flue gas needs to be fully treated to control the temperature of the flue gas and prevent the production of dioxins. At the same time, the sulfides, acid gases, particulate matter, etc. in the flue gas need to be fully treated to finally meet the emission requirements. Summary of the invention

[0003] In order to meet the emission requirements of smoke after incineration of pharmaceutical solid waste, the utility model provides a pharmaceutical solid waste incineration smoke treatment system.

[0004] The technical solution adopted by the utility model is:

[0005] A flue gas treatment system for incineration of pharmaceutical solid waste includes a treatment system and a dosing system, wherein the treatment system includes a semi-dry quenching tower, a dry reaction tower, a bag dust removal device, a spray washing tower, an absorption tower and a chimney; a flue gas inlet is provided in the middle of the semi-dry quenching tower, an alkali solution nozzle is provided at the top of the semi-dry quenching tower, an ash hopper is installed at the bottom of the semi-dry quenching tower, the bottom of the semi-dry quenching tower is connected to the middle and lower part of the dry reaction tower through a pipeline, an ash hopper is installed at the bottom of the dry reaction tower, a dosing system is connected to the middle of the dry reaction tower, a flue gas outlet is provided at the top of the dry reaction tower, and the flue gas outlet is connected to the bag dust removal device through a pipeline, The outlet of the bag dust removal device is connected to the top of the spray washing tower through a pipeline and an induced draft fan; a plurality of layers of spray devices are arranged in the spray washing tower, the spray devices are connected to a circulation pump, the circulation pump is connected to a circulation pool through a pipeline, and a pipeline connected to the circulation pool is arranged at the bottom of the spray washing tower; the bottom of the spray washing tower is connected to the absorption tower through a pipeline, a plurality of layers of fillers are installed in the absorption tower, a spray device is installed above each layer of filler, the spray device is connected to a circulation pump, the circulation pump is connected to a circulation pool through a pipeline, and a pipeline connected to the circulation pool is arranged at the bottom of the absorption tower; the top of the absorption tower is connected to the bottom of the chimney through a pipeline.

[0006] Furthermore, the dosing system includes an activated carbon storage tank and a slaked lime storage tank, and dischargers are respectively installed at the bottom of the activated carbon storage tank and the slaked lime storage tank, and the dischargers are connected to the dosing pipeline. A Roots blower is installed at one end of the dosing pipeline, and the other end of the dosing pipeline is connected to the middle of the dry reaction tower.

[0007] Furthermore, the tops of the activated carbon storage tank and the slaked lime storage tank are respectively connected to vacuum loaders.

[0008] Furthermore, a plurality of circumferentially distributed alkali solution spray heads are provided on the top of the semi-dry quenching tower, the alkali solution spray heads are connected to an alkali solution pump and a high-pressure air pipeline, and the alkali solution pump is connected to an alkali water pool.

[0009] Furthermore, the alkaline water pool is connected to an alkaline water tank, and the bottom of the alkaline water tank is connected to the alkaline water pool through a pipeline and a valve.

[0010] Furthermore, a bypass branch is provided between the air inlet and the air outlet of the bag dust removal device.

[0011] Furthermore, a wastewater pool is provided on one side of the circulation pool, an overflow port is provided on one side of the circulation pool, the overflow port is connected to the wastewater pool, and a wastewater pump is installed in the wastewater pool.

[0012] Furthermore, a spiral ash discharger is installed at the slag outlet at the bottom of the bag-type dust removal device, and a star-shaped ash discharge valve is installed at the end of the spiral ash discharger.

[0013] After adopting the above technical scheme, the beneficial effects of the utility model are:

[0014] The alkali solution is atomized into fine droplets through the alkali solution nozzle in the semi-dry quenching tower. Under the action of the upward hot flue gas, a high-density area of ​​suspended alkaline droplets is formed near the nozzle. The acidic substances in the flue gas undergo a neutralization reaction when passing through this area. By adjusting the amount of alkali solution, the temperature is quickly reduced to about 200°C within 1 second, thereby effectively inhibiting the regeneration of dioxins. At the same time, some sparks in the flue gas are extinguished by the sprayed water mist, protecting the subsequent bags from being burned.

[0015] The acid and dioxin in the flue gas are absorbed by the dry reaction tower. A mixture storage tank for charcoal lime is installed at the connection to the flue. Charcoal lime (a mixture of calcium hydroxide powder and activated carbon powder) is sprayed in to remove dioxins and acidic components such as SOx, HCl, NOx, etc. in the flue gas, thereby further purifying the exhaust gas.

[0016] The fine dust trapped in the flue gas is removed by the bag dust removal device. The flue gas from the bag dust removal device enters the spray scrubber and absorption tower through the induced draft fan to wash away the acidic gas in the flue gas. Finally, the purified flue gas is discharged into the atmosphere through the chimney.

[0017] This technical solution can fully and effectively treat the flue gas, and the treated flue gas meets the emission standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the processing system of the utility model.

[0019] In the figure: dry quenching tower 1, dry reaction tower 2, bag dust removal device 3, spray washing tower 4, absorption tower 5, chimney 6, alkali solution nozzle 7, high-pressure air pipeline 8, spiral ash discharger 9, star-shaped ash discharge valve 10, bypass branch 11, activated carbon storage tank 12, slaked lime storage tank 13, star-shaped discharger 14, dosing pipeline 15, Roots blower 16, vacuum feeder 17, circulating pump 18, alkali water pool 19, circulating pool 20, wastewater pool 21, wastewater pump 22, alkali water tank 23. DETAILED DESCRIPTION

[0020] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings:

[0021] like Figure 1 As shown, the pharmaceutical solid waste incineration flue gas treatment system includes a treatment system, a dosing system and a circulation system, and is used for treating flue gas after waste incineration.

[0022] The treatment system consists of a semi-dry quenching tower 1, a dry reaction tower 2, a bag dust removal device 3, a spray washing tower 4, an absorption tower 5 and a chimney 6.

[0023] A flue gas inlet is provided in the middle of the semi-dry quenching tower 1, and a plurality of alkali solution nozzles 7 are provided on the top of the semi-dry quenching tower 1. The alkali solution nozzles 7 are circumferentially distributed on the top of the semi-dry quenching tower 1, and the alkali solution nozzles 7 are connected to the alkali solution input and the high-pressure air pipeline 8. The high-pressure air and the alkali solution are atomized into fine droplets through the alkali solution nozzles 7, and a high-density area of ​​alkaline droplet suspension is formed in the middle and upper part of the semi-dry quenching tower 1. When the flue gas passes through this area, the acidic substances undergo a neutralization reaction when passing through this area, and the flue gas is rapidly cooled, thereby inhibiting the regeneration of dioxins. An ash hopper is installed at the bottom of the semi-dry quenching tower 1, and the particulate matter in the flue gas falls into the ash hopper for collection.

[0024] The bottom of the semi-dry quenching tower 1 is connected to the middle and lower part of the dry reaction tower 2 through a pipeline. The flue gas after quenching enters the dry reaction tower 2. The middle part of the dry reaction tower 2 is connected to a dosing system, and activated carbon and slaked lime powder are sent to the dry reaction tower to remove dioxins and SOx, HCl, NOx and other components in the flue gas. An ash hopper is installed at the bottom of the dry reaction tower 2 to receive the powder in the reactor. A flue gas outlet is provided at the top of the dry reaction tower 2, and the flue gas outlet is connected to the bag dust removal device 3 through a pipeline.

[0025] The bag dust collector 3 is a pulse bag dust collector. The treated flue gas mixed with slaked lime and other powders enters the bag dust collector 3. The bag filters the powders and the like therein. Under the action of the airflow pulse, the intercepted powder enters the spiral ash discharger 9 from the slag outlet at the bottom. The end of the spiral ash discharger 9 is equipped with a star-shaped ash discharge valve 10. The slag is discharged through the star-shaped ash discharge valve 10 to maintain the sealing. The filtered flue gas is sent to the spray washing tower 4 from the air outlet of the bag dust collector 3 through the pipeline and the induced draft fan. A bypass branch 11 is provided between the air inlet and the air outlet of the bag dust collector 3. When the flue gas temperature is high, it is bypassed through the bypass branch 11 to prevent the bag from being scalded.

[0026] The spray washing tower 4 is provided with multiple layers of spray devices, which are connected to the input of alkali solution. The bottom of the spray washing tower 4 is connected to the absorption tower 5 through a pipeline. The absorption tower 5 is provided with multiple layers of fillers, and each layer of fillers is provided with a spray device above it. The top of the absorption tower 5 is connected to the bottom of the chimney 6 through a pipeline. The acidic components in the flue gas are further absorbed by the spray washing tower 4 and the absorption tower 5, and finally the emission requirements are met.

[0027] The dosing system is used to provide reagents to the dry reaction tower. The dosing system includes an activated carbon storage tank 12 and a slaked lime storage tank 13. The bottoms of the activated carbon storage tank 12 and the slaked lime storage tank 13 are respectively installed with star-shaped dischargers 14. Each star-shaped discharger 14 is respectively connected to a dosing pipeline 15. A Roots blower 16 is installed at one end of the dosing pipeline 15. The other end of the dosing pipeline 15 is connected to the middle of the dry reaction tower 2. The reagent is sent into the dosing pipeline 15 through the star-shaped discharger 14, and then the Roots blower 16 sends the reagent into the reaction tower 2 to participate in the reaction. The tops of the activated carbon storage tank 12 and the slaked lime storage tank 13 are respectively connected with vacuum loaders 17 for replenishing the reagents.

[0028] The circulation system is used for supplying alkali solution to the semi-dry quenching tower 1, the spray washing tower 4 and the absorption tower 5. The circulation system includes a plurality of circulation pumps 18, an alkali water pool 19 and a circulation pool 20. The alkali solution is extracted from the alkali water pool 19 by each circulation pump 18 and sent to the alkali solution nozzle 7 and the spraying device in the spray washing tower 4 and the absorption tower 5. The bottom of the spray washing tower 4 and the absorption tower 5 are respectively connected to the circulation pool 20 through pipelines to realize the circulation of the alkali solution. The alkali water pool 19 is connected to an alkali water tank 23, and the bottom of the alkali water tank 23 is connected to the alkali water pool 19 through pipelines and valves for replenishing the alkali solution. A wastewater pool 21 is provided on one side of the circulation pool 20, and an overflow port is provided on one side of the circulation pool 20, and the overflow port is connected to the wastewater pool 21. A wastewater pump 22 is installed in the wastewater pool 21 to discharge the wastewater overflowing from the circulation pool 20.

Claims

1. The flue gas treatment system for incineration of pharmaceutical solid waste includes a treatment system and a dosing system, which is characterized by: The treatment system includes a semi-dry quenching tower, a dry reaction tower, a bag dust removal device, a spray washing tower, an absorption tower and a chimney; a flue gas inlet is provided in the middle of the semi-dry quenching tower, an alkali solution nozzle is provided at the top of the semi-dry quenching tower, an ash hopper is installed at the bottom of the semi-dry quenching tower, the bottom of the semi-dry quenching tower is connected to the middle and lower part of the dry reaction tower through a pipeline, an ash hopper is installed at the bottom of the dry reaction tower, a dosing system is connected to the middle of the dry reaction tower, a flue gas outlet is provided at the top of the dry reaction tower, the flue gas outlet is connected to the bag dust removal device through a pipeline, and the outlet of the bag dust removal device is connected to the bag dust removal device through a pipeline. The top of the spray washing tower is connected to the induced draft fan; multiple layers of spray devices are arranged in the spray washing tower, the spray devices are connected to a circulation pump, the circulation pump is connected to a circulation pool through a pipeline, and a pipeline connected to the circulation pool is arranged at the bottom of the spray washing tower; the bottom of the spray washing tower is connected to the absorption tower through a pipeline, multiple layers of fillers are installed in the absorption tower, spray devices are respectively installed above each layer of fillers, the spray devices are connected to a circulation pump, the circulation pump is connected to a circulation pool through a pipeline, and a pipeline connected to the circulation pool is arranged at the bottom of the absorption tower; the top of the absorption tower is connected to the bottom of the chimney through a pipeline.

2. The pharmaceutical solid waste incineration flue gas treatment system according to claim 1 is characterized in that: The dosing system includes an activated carbon storage tank and a slaked lime storage tank. Dischargers are respectively installed at the bottom of the activated carbon storage tank and the slaked lime storage tank. The dischargers are connected to a dosing pipeline. A Roots blower is installed at one end of the dosing pipeline, and the other end of the dosing pipeline is connected to the middle of the dry reaction tower.

3. The pharmaceutical solid waste incineration flue gas treatment system according to claim 2 is characterized in that: The tops of the activated carbon storage tank and the slaked lime storage tank are respectively connected with vacuum feeders.

4. The pharmaceutical solid waste incineration flue gas treatment system according to claim 1 is characterized in that: A plurality of circumferentially distributed alkali solution spray heads are arranged on the top of the semi-dry quenching tower, the alkali solution spray heads are connected to an alkali solution pump and a high-pressure air pipeline, and the alkali solution pump is connected to an alkali water pool.

5. The pharmaceutical solid waste incineration flue gas treatment system according to claim 4 is characterized in that: The alkaline water pool is connected with an alkaline water tank, and the bottom of the alkaline water tank is connected with the alkaline water pool through a pipeline and a valve.

6. The pharmaceutical solid waste incineration flue gas treatment system according to claim 1 is characterized in that: A bypass branch is provided between the air inlet and the air outlet of the bag dust removal device.

7. The pharmaceutical solid waste incineration flue gas treatment system according to claim 1 is characterized in that: A wastewater pool is arranged on one side of the circulation pool, an overflow port is arranged on one side of the circulation pool, the overflow port is connected to the wastewater pool, and a wastewater pump is installed in the wastewater pool.

8. The pharmaceutical solid waste incineration flue gas treatment system according to claim 1 is characterized in that: A spiral ash discharging machine is installed at the slag outlet at the bottom of the bag dust removal device, and a star-shaped ash discharging valve is installed at the end of the spiral ash discharging machine.

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