Combined treatment equipment for desulfurization wastewater of thermal power plant
By integrating desulfurization wastewater treatment equipment and combining a high-efficiency filtration structure of filter screens and scrapers, the problems of low energy utilization and poor filter screen filtration effect in existing equipment have been solved, achieving efficient wastewater treatment and energy saving.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-03-31
AI Technical Summary
In existing desulfurization wastewater treatment equipment for thermal power plants, the energy recycling effect is low, the filtration effect of the filter screen is limited, and impurities enter the next process, affecting the treatment efficiency.
The integrated desulfurization wastewater treatment equipment includes a desulfurization wastewater tank, a neutralization tank, a flocculation sedimentation tank, a heavy metal removal tank, and an evaporation crystallization structure. The connecting pipes are equipped with filters and scrapers, with filter cloth on the filters. The upper side wall of the connecting pipes is equipped with a telescopic structure. The combination of filters and scrapers achieves high-efficiency filtration, and heat exchange is carried out at the steam generator to save energy.
It improves the efficiency of desulfurization wastewater treatment, reduces the amount of impurities entering the next process, saves energy, and improves overall treatment efficiency.
Smart Images
Figure CN224062627U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of desulfurization wastewater treatment technology, specifically to a combined treatment device for desulfurization wastewater from thermal power plants. Background Technology
[0002] Flue gas generated by the combustion of thermal power plants must undergo desulfurization, denitrification, and dust removal to meet standards before it can be emitted into the air. Existing desulfurization technologies mostly adopt wet desulfurization, which produces wastewater containing a large amount of suspended solids, heavy metal ions, sulfates, and other pollutants that require treatment before discharge. Common desulfurization wastewater treatment methods include neutralization, flocculation, heavy metal removal, and evaporation crystallization. However, these combined treatment devices are generally used individually, resulting in low energy recycling efficiency. Furthermore, impurity filtration during the treatment process typically relies solely on filter screens, which have limited filtration effectiveness. Moreover, impurities entering the next process can affect the processing efficiency of that process, indicating room for improvement. Utility Model Content
[0003] The purpose of this invention is to address the shortcomings of the aforementioned background technology by providing a combined treatment equipment for desulfurization wastewater from thermal power plants that ensures treatment efficiency and improves energy utilization.
[0004] To achieve the above objectives, this utility model provides a combined treatment device for desulfurization wastewater from thermal power plants, which adopts the following technical solution:
[0005] A combined treatment device for desulfurization wastewater from a thermal power plant includes a desulfurization wastewater tank, which is connected to a neutralization tank via a connecting pipe. The neutralization tank is connected to a flocculation sedimentation tank, which is connected to a heavy metal removal tank. The heavy metal removal tank is connected to an evaporation crystallization structure, which is connected to a steam generator. The outer wall of the neutralization tank is provided with a chamber filled with water, and the chamber is connected to the steam generator.
[0006] A further improvement of this utility model of a combined treatment equipment for desulfurization wastewater in thermal power plants is that a protective shell is provided on the outside of the connecting pipe, the connecting pipe has a square cross-section, a notch is provided on the upper side wall of the connecting pipe, a filter screen is inserted into the notch, a fixing groove is provided on the front and rear side walls of the connecting pipe, the front and rear ends of the filter screen are inserted into the fixing groove, and a groove is provided on the lower side wall of the connecting pipe, which is close to the filter screen.
[0007] A further improvement of this utility model of a combined treatment equipment for desulfurization wastewater in thermal power plants is that a filter cloth is provided on the filter screen, and a telescopic structure is provided on the outer side of the upper side wall of the connecting pipe. The telescopic structure is connected to a scraper that extends into the connecting pipe. The scraper is used to scrape the impurities remaining on the filter cloth into the groove.
[0008] A further improvement of this utility model of a combined treatment equipment for desulfurization wastewater in thermal power plants is that a desulfurization tower is also provided on one side of the desulfurization wastewater tank. The desulfurization tower is connected to a flue gas inlet pipe. A heat exchange chamber is provided on the flue gas inlet pipe. The heat exchange chamber is provided with an inlet and an outlet. The outlet is connected to a steam generator.
[0009] Compared with the prior art, the beneficial effects of this utility model are:
[0010] This invention improves efficiency and saves energy by exchanging heat with the water inlet of the steam generator; on the other hand, it achieves efficient filtration through connecting pipes, reducing the impurities in the wastewater entering the next process and improving treatment efficiency. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of this utility model;
[0012] Figure 2 for Figure 1 A magnified view of a portion of the image;
[0013] In the diagram: 1. Desulfurization wastewater tank, 2. Connecting pipe, 3. Neutralization tank, 4. Flocculation sedimentation tank, 5. Heavy metal removal tank, 6. Evaporation crystallization structure, 7. Steam generator, 8. Desulfurization tower, 9. Flue gas inlet pipe, 10. Protective shell, 11. Filter screen, 12. Groove, 13. Scraper, 14. Chamber. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] like Figure 1 and Figure 2 As shown, a combined treatment device for desulfurization wastewater from a thermal power plant includes a desulfurization wastewater tank 1, which is connected to a neutralization tank 3 via a connecting pipe 2. The neutralization tank is connected to a flocculation sedimentation tank 4, which is connected to a heavy metal removal tank 5. The heavy metal removal tank is connected to an evaporation crystallization structure 6, which is connected to a steam generator 7. A chamber 14 is provided on the outer wall of the neutralization tank, and the chamber is filled with water and connected to the steam generator.
[0016] Specifically, a protective shell 10 is provided on the outside of the connecting pipe 2. The connecting pipe has a square cross-section. A notch is provided on the upper side wall of the connecting pipe, and a filter screen is inserted into the notch. Fixing grooves are provided on the front and rear side walls of the connecting pipe, and the front and rear ends of the filter screen are inserted into the fixing grooves. A groove 12 is provided on the lower side wall of the connecting pipe, close to the filter screen. A sealing structure can be set after the filter screen is installed. A filter cloth is provided on the filter screen. A telescopic structure is provided on the outer side of the upper side wall of the connecting pipe. The telescopic structure is connected to a scraper 13 that extends into the connecting pipe. The scraper is used to scrape the impurities remaining on the filter cloth into the groove. The connecting pipe can be installed at an angle. The protective shell can be composed of four sets of side walls that are detachably connected to each other. A discharge port can be provided at the lower end of the groove. A notch can be provided on the side wall of the protective shell, and a baffle is provided at the notch to facilitate the replacement of the filter screen or the cleaning of impurities at the discharge port.
[0017] Furthermore, a desulfurization tower 8 is also provided on one side of the desulfurization wastewater tank. The desulfurization tower is connected to a flue gas inlet pipe 9. A heat exchange chamber is provided on the flue gas inlet pipe. The heat exchange chamber is provided with an inlet and an outlet. The outlet is connected to a steam generator.
[0018] The working principle of this utility model is as follows: Desulfurization wastewater enters the desulfurization wastewater tank, then passes through a connecting pipe to filter out most of the suspended impurities, enters the neutralization tank for pH adjustment, and then enters the flocculation sedimentation tank. The connecting pipe can be equipped with a filter structure. After entering the flocculation sedimentation tank, flocculation and sedimentation occur, followed by heavy metal removal. Finally, it enters the evaporation crystallization structure for crystallization. At this time, the steam for evaporation crystallization is generated by a steam generator. The water entering the steam generator exchanges heat with the flue gas pipe and the heat generated by the neutralization reaction, saving energy and improving efficiency.
[0019] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A combined treatment equipment for desulfurization wastewater from thermal power plants, characterized in that: The desulfurization wastewater tank is connected to the neutralization tank through a connecting pipeline, the neutralization tank is connected to the flocculation and precipitation tank, the flocculation and precipitation tank is connected to the heavy metal removal tank, the heavy metal removal tank is connected to the evaporation and crystallization structure, the evaporation and crystallization structure is connected to the steam generator, and the outer wall of the neutralization tank is provided with a cavity which is filled with water and is communicated with the steam generator.
2. A combined treatment device for desulfurization wastewater of a thermal power plant according to claim 1, characterized in that: The connecting pipeline is provided with a protective shell outside, the cross section of the connecting pipeline is square, a notch is arranged on the upper wall of the connecting pipeline, a filter screen is arranged in the notch, and fixing grooves are arranged on the front and rear walls of the connecting pipeline, the front and rear ends of the filter screen are clamped into the fixing grooves, and a recess is arranged on the lower wall of the connecting pipeline and is close to the filter screen.
3. A combined treatment device for desulfurization wastewater of a thermal power plant according to claim 2, characterized in that: A filter cloth is arranged on the filter screen, an extension structure is arranged outside the upper wall of the connecting pipeline, the extension structure is connected to a scraper which extends into the connecting pipeline, and the scraper is used for scraping the impurities remaining on the filter cloth to the recess.
4. A combined treatment device for desulfurization wastewater of a thermal power plant according to claim 3, characterized in that: The desulfurization wastewater tank is further provided with a desulfurization tower on one side, the desulfurization tower is connected with a flue gas inlet pipe, the flue gas inlet pipe is provided with a heat exchange cavity, the heat exchange cavity is provided with a water inlet and a water outlet, and the water outlet is connected to the steam generator.