Ring set desulfurization lead-out liquid oxidation system
By designing the ring collector desulfurization effluent oxidation system and using high-pressure injection technology to form a gas-liquid mixture to enhance the oxidation effect, the problem of high MgSO3 and MgHSO3 content in the ring collector desulfurization effluent was solved and the drainage indicators were met.
Patent Information
- Application Number
- CN202421192292.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-28
AI Technical Summary
In the gas purification process, the ring-collection desulfurization extract still contains a large amount of MgSO3 and MgHSO3, which fails to completely oxidize, resulting in a high sulfide content and a high risk of exceeding the standard, which cannot meet the requirements of drainage indicators.
A ring-collecting desulfurization effluent oxidation system is designed, including a reaction tank, a liquid inlet hopper, an oxidation pump and an aeration ejector. The ring-collecting desulfurization effluent is sent to the aeration ejector through the oxidation pump, and a high-pressure nozzle is used to spray the liquid at high speed. Spray out to form a gas-liquid mixture, forming a large number of bubbles in the reaction tank to enhance the oxidation effect.
Through the full oxidation treatment of this system, the MgSO3 and MgHSO3 contents in the ring collector desulfurization effluent can be effectively reduced, meeting the requirements of drainage indicators and reducing the risk of exceeding standards.
Smart Images
Figure CN222374476U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of wastewater treatment, and in particular relates to a ring-collecting desulfurization outlet liquid oxidation system. Background Art
[0002] At present, the desulfurization in the coal gas purification process in China is divided into wet desulfurization and dry desulfurization. In the wet desulfurization project, a large part of the desulfurization technology uses various alkalis or ammonia water as the alkali source. This technology absorbs hydrogen sulfide in the coal gas through the desulfurization outlet liquid after adding the catalyst, and then oxidizes the incoming ring-collected desulfurization outlet liquid through a high-efficiency oxidation device through a large-flow chemical pump and circulates the liquid in the reaction tank to oxidize MgSO3 and MgHSO3 into MgSO4, and then the sulfide is processed later. The desulfurization outlet liquid after the sulfide is removed is regenerated and recycled. However, in actual production, the ring-collected desulfurization outlet liquid in the neutralization process, although it has been oxidized twice, still contains a large amount of MgSO3 and MgHSO3. If it is not thoroughly oxidized, the sulfide content of the desulfurization outlet liquid will be high and there will be a risk of exceeding the standard, and the drainage index requirements will not be met. Utility Model Content
[0003] The utility model provides a ring-collecting desulfurization outlet liquid oxidation system, which aims to fully oxidize the ring-collecting desulfurization outlet liquid to meet the requirements of drainage indicators.
[0004] A ring-collecting desulfurization lead liquid oxidation system comprises a reaction tank, a liquid inlet hopper, an oxidation pump and an aeration ejector. The ring-collecting desulfurization lead liquid is transported to the liquid inlet hopper. The liquid inlet hopper and the oxidation pump are connected to the aeration ejector through a liquid discharge pipeline. The ring-collecting desulfurization lead liquid pumped to the aeration ejector by the oxidation pump is discharged to the reaction tank by the aeration ejector.
[0005] In the above scheme, the effluent from the ring-collecting desulfurization is transported to the liquid inlet hopper, and the liquid inlet hopper is connected to the oxidation pump and the oxidation pump is connected to the aeration injector by a drainage pipeline. The oxidation pump delivers the effluent from the ring-collecting desulfurization entering the liquid inlet hopper to the aeration injector, and the liquid with a certain pressure is ejected from the nozzle at a high speed and discharged to the reaction tank, thereby enhancing the oxidation effect, aiming to fully oxidize the effluent from the ring-collecting desulfurization and meet the requirements of drainage indicators. BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Figure 1 This is a flow chart of the desulfurization outlet liquid oxidation system of the utility model. DETAILED DESCRIPTION
[0007] A ring-collecting desulfurization effluent oxidation system comprises a reaction tank 1, a liquid inlet hopper 2, an oxidation pump 3, and an aeration injector 4. The ring-collecting desulfurization effluent is transported to the liquid inlet hopper 2. The liquid inlet hopper 2 and the oxidation pump 3 are connected to the aeration injector 4 through a discharge pipeline 5. The ring-collecting desulfurization effluent pumped to the aeration injector 4 by the oxidation pump 3 is discharged to the reaction tank 1 by the aeration injector 4.
[0008] In the above scheme, the oxidation pump 3 delivers the ring-collecting desulfurization effluent liquid entering the liquid inlet hopper 2 to the aeration injector 4. The aeration injector 4 ejects the ring-collecting desulfurization effluent liquid with a certain pressure from the nozzle at a high speed, and forms a vacuum in the nozzle outlet area of the aeration injector 4, so that a large amount of air is drawn in and mixed with the desulfurization effluent liquid in the diffuser to form a gas-liquid mixture. The desulfurization effluent liquid is finally discharged at a pressure higher than the atmospheric pressure, and a large number of bubbles are formed in the reaction tank 1, thereby enhancing the oxidation effect of the ring-collecting desulfurization effluent liquid, fully oxidizing the ring-collecting desulfurization effluent liquid, and meeting the requirements of the drainage index.
[0009] Furthermore, the liquid inlet hopper 2 is located above the reaction tank 1, and the oxidation pump 4 is located below the reaction tank 1. The discharge pipeline 5 between the liquid inlet hopper 2 and the oxidation pump 4 is connected to the lower middle position of the reaction tank 1 by a connecting pipe 6.
[0010] In the above scheme, the liquid inlet hopper 2 is located at the upper position of the reaction tank 1, the oxidation pump 3 is located at the lower position of the reaction tank 1, and the discharge pipeline 5 between the liquid inlet hopper 2 and the oxidation pump 4 is connected to the lower middle position of the reaction tank 1 by a connecting pipe 6. When the ring-collecting desulfurization effluent liquid is cut off, the liquid in the reaction tank 1 can be circulated and oxidized to avoid damage to the equipment by the oxidation pump 4 when it is idle; or when the oxidation pump 3 fails and the discharge pipeline 5 is blocked, the liquid inlet hopper 2 can be connected to the reaction tank 1 to prevent the ring-collecting desulfurization effluent liquid from overflowing.
[0011] Preferably, the pumping capacity of the oxidation pump 3 is greater than the liquid output of the annular desulfurization outlet liquid of the liquid inlet hopper 2.
[0012] In the above scheme, the pumping volume of the oxidation pump 3 is greater than the liquid output of the ring-collecting desulfurization effluent from the liquid inlet hopper 2. The ring-collecting desulfurization effluent in the reaction tank 1 can be pumped for multiple cycles of oxidation while the ring-collecting desulfurization effluent in the liquid inlet hopper 2 is pumped. At the same time, aeration oxidation of the ring-collecting desulfurization effluent in the liquid inlet hopper 2 and cyclic aeration oxidation of part of the ring-collecting desulfurization effluent in the reaction tank 1 are performed, thereby further increasing the overall oxidation effect of the ring-collecting desulfurization effluent.
[0013] Preferably, the liquid inlet hopper 2 is connected to a liquid inlet hopper overflow pipe 7, and the lower end of the liquid inlet hopper overflow pipe 7 is connected to the reaction tank 1, thereby ensuring that when there is a problem with the liquid inlet hopper 2, the oxidation pump 3 fails, or the discharge pipeline 5 is blocked, the annular desulfurization lead liquid in the liquid inlet hopper 2 enters the reaction tank through the liquid inlet hopper overflow pipe 7 and does not overflow.
[0014] Furthermore, in order to facilitate the aeration injector 4 to spray the ring-collecting desulfurization effluent into the reaction tank 1 , the aeration injector 4 is located directly above the slot of the reaction tank 1 , and the liquid outlet of the aeration injector 4 discharges the ring-collecting desulfurization effluent into the reaction tank 1 .
[0015] Furthermore, an overflow outlet 11 is provided on the upper part of the tank wall of the reaction tank 1, and the ring-collected desulfurization lead liquid in the reaction tank 1 is discharged by overflow.
[0016] Specifically, in the present ring-collecting desulfurization effluent oxidation system, the liquid inlet hopper 2 is located above the reaction tank 1, and the oxidation pump 3 is located below the reaction tank 1. The oxidation pump 3 delivers the ring-collecting desulfurization effluent entering the liquid inlet hopper 2 and part of the liquid in the reaction tank 1 to the aeration injector 4. The aeration injector 4 ejects the ring-collecting desulfurization effluent with a certain pressure from the nozzle at a high speed, and forms a vacuum in the nozzle outlet area of the aeration injector 4, so that a large amount of air is drawn in to mix with the ring-collecting desulfurization effluent in the diffuser to form a gas-liquid mixture, and a large number of bubbles are formed in the reaction tank 1, thereby achieving the enhancement of the oxidation effect of the ring-collecting desulfurization effluent.
Claims
1. A ring-collecting desulfurization outlet liquid oxidation system, characterized in that: The invention comprises a reaction tank (1), a liquid inlet hopper (2), an oxidation pump (3), and an aeration ejector (4); the ring-collected desulfurization effluent is transported to the liquid inlet hopper (2); the liquid inlet hopper (2) and the oxidation pump (3) and the oxidation pump (3) and the aeration ejector (4) are connected by a liquid discharge pipeline (5); the ring-collected desulfurization effluent pumped by the oxidation pump (3) to the aeration ejector (4) is discharged by the aeration ejector (4) to the reaction tank (1).
2. The ring collection desulfurization outlet liquid oxidation system according to claim 1 is characterized in that: The liquid inlet hopper (2) is located above the reaction tank (1), the oxidation pump (4) is located below the reaction tank (1), and the liquid discharge pipeline (5) between the liquid inlet hopper (2) and the oxidation pump (4) is connected to the lower middle part of the reaction tank (1) by a connecting pipe (6).
3. The ring collection desulfurization outlet liquid oxidation system according to claim 2 is characterized in that: The pumping capacity of the oxidation pump (3) is greater than the liquid output of the ring-collected desulfurization outlet liquid of the liquid inlet hopper (2).
4. The ring collection desulfurization outlet liquid oxidation system according to claim 3 is characterized in that: The liquid inlet hopper (2) is connected to a liquid inlet hopper overflow pipe (7), and the lower end of the liquid inlet hopper overflow pipe (7) is connected to the reaction tank (1).
5. The ring collection desulfurization outlet liquid oxidation system according to claim 1 is characterized in that: The aeration injector (4) is located just above the notch of the reaction tank (1), and the liquid outlet of the aeration injector (4) discharges the ring-collected desulfurization effluent into the reaction tank (1).
6. The ring collection desulfurization outlet liquid oxidation system according to claim 1 is characterized in that: An overflow drain port (11) is provided on the upper part of the tank wall of the reaction tank (1).