Desulfurization wastewater flue gas evaporation and concentration device
By using scrapers and spiral feed pipes in the desulfurization wastewater evaporation and concentration device to prevent crystallization blockage, and using high-temperature waste gas to preheat wastewater, the problems of high energy consumption and pipeline blockage in the prior art are solved, and energy consumption reduction and treatment are achieved Improve efficiency.
Patent Information
- Application Number
- CN202323451933.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-18
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2033-12-18
AI Technical Summary
The existing desulfurization wastewater evaporation and concentration devices have high energy consumption and are prone to pipeline blockage.
A device including an evaporation box, heater, scraper, screw feed pipe and wastewater preheating box is designed to prevent crystallization blockage through scraper and screw feed pipe, and to preheat wastewater with high temperature exhaust gas to reduce energy consumption.
It effectively prevents pipeline blockage, reduces energy consumption in the evaporation box, and improves the efficiency of wastewater treatment.
Smart Images
Figure CN222274167U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of desulfurization wastewater treatment, in particular to a desulfurization wastewater flue gas evaporation and concentration device. Background Art
[0002] In order to maintain the material balance of the desulfurization device slurry circulation system, prevent the soluble part of the flue gas, namely the chlorine concentration, from exceeding the specified value and ensure the quality of gypsum, a certain amount of wastewater must be discharged from the system. The wastewater mainly comes from the gypsum dehydration and cleaning system.
[0003] In the treatment of desulfurization wastewater, evaporation concentration is more commonly used, that is, evaporation is performed by heating, and then the wastewater and crystallized waste are concentrated for subsequent treatment. However, the evaporation concentration devices in the prior art have the problems of high energy consumption and crystallization blockage. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a desulfurization wastewater flue gas evaporation and concentration device with low energy consumption and reduced pipeline blockage in view of the deficiencies raised in the above-mentioned background technology.
[0005] In order to solve the above technical problems, the technical solution provided by the utility model is: a desulfurization wastewater flue gas evaporation and concentration device, including an evaporation box, the top of the evaporation box is connected to a sealed top cover, the bottom of the evaporation box is connected to a heater, the top of the sealed top cover is connected to a water supply pipe and a driving motor, the water supply pipe is externally connected to a wastewater preheating box, the bottom power end of the driving motor is connected to a supporting shaft extending to the top of the evaporation box, the bottom sides of the supporting shaft are connected to support rods, the bottom of the support rods is connected to a scraper close to the evaporation box, the bottom of the evaporation box is connected to a waste pipe, the bottom of the waste pipe is connected to a spiral feed pipe, the rear side of the spiral feed pipe is connected to a servo motor, the top of the evaporation box is connected to an exhaust pipe, and the exhaust pipe is connected to an exhaust valve.
[0006] Furthermore, a rotating rod is connected to the bottom of the support rod, a plurality of auxiliary stirring rods are connected to the outside of the rotating rod, and the bottom of the rotating rod extends into the waste pipe and is connected to an auger blade, which is convenient for auxiliary stirring and auxiliary cleaning of the waste pipe.
[0007] Furthermore, a first temperature sensor and a pressure sensor are connected to the top of the evaporator box to facilitate sensing of internal temperature and pressure.
[0008] Furthermore, the middle of the wastewater preheating box is an external high-temperature exhaust gas pipe, the top of the wastewater preheating box is connected to a sewage input pipe, the sewage input pipe extends into the wastewater preheating box and is connected to a water supply coil that wraps the high-temperature exhaust gas pipe, and the rear side of the water supply coil is connected to a water supply pipe to facilitate external preheating operations and reduce energy consumption.
[0009] Furthermore, the water supply pipe is connected to a second temperature sensor, and the sewage input pipe is connected to an electrically controlled flow control valve electrically connected to the second temperature sensor, so as to facilitate the control of sewage inflow.
[0010] The advantages of the desulfurization wastewater flue gas evaporation and concentration device of the utility model compared with the prior art are: the utility model can prevent the crystallization of evaporation and concentration from causing pipeline blockage through the internal scraper and the spiral feed pipe at the bottom, and at the same time, the high-temperature exhaust gas is preheated through the external water adding pipe to reduce the energy consumption of the evaporation box. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a three-dimensional structural schematic diagram of a desulfurization wastewater flue gas evaporation and concentration device of the utility model.
[0012] Figure 2 The utility model is a cross-sectional structural schematic diagram of a desulfurization wastewater flue gas evaporation concentration device.
[0013] Figure 3 The utility model is a schematic diagram of the cross-sectional structure of a wastewater preheating box of a desulfurization wastewater flue gas evaporation concentration device.
[0014] As shown in the figure: 1. Evaporation box; 2. Wastewater preheating box; 3. Sealing top cover; 4. Water adding pipe; 5. Heater; 6. Driving motor; 7. Support shaft; 8. Support rod; 9. Scraper; 10. Waste discharge pipe; 11. Rotating rod; 12. Auxiliary stirring rod; 13. Auger blade; 14. Spiral feed pipe; 15. Servo motor; 16. First temperature sensor; 17. Pressure sensor; 18. Exhaust pipe; 19. Exhaust valve; 20. Second temperature sensor; 21. High-temperature exhaust gas pipeline; 22. Sewage input pipe; 23. Water delivery coil; 24. Electric flow control valve. DETAILED DESCRIPTION
[0015] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0016] Combined with Figure 1-3A flue gas evaporation and concentration device for desulfurization wastewater includes an evaporation box 1, the top of the evaporation box 1 is connected with a sealed top cover 3, the bottom of the evaporation box 1 is connected with a heater 5, the top of the sealed top cover 3 is connected with a water supply pipe 4 and a drive motor 6, the water supply pipe 4 is externally connected with a wastewater preheating box 2, the wastewater entering can be preheated by the wastewater preheating box 2, thereby reducing the energy consumption of the heater 5, the bottom power end of the drive motor 6 is connected with a support shaft 7 extending to the top of the evaporation box 1, the bottom sides of the support shaft 7 are connected with support rods 8, the bottom of the support rod 8 is connected with a scraper 9 close to the evaporation box 1, the bottom of the evaporation box 1 is connected with a waste pipe 10, and the bottom of the waste pipe 10 is connected with a spiral feed pipe 14, a servo motor 15 is connected to the rear side of the spiral feed pipe 14, and the output rate of the spiral feed pipe 14 can be controlled by the servo motor 15, so as to ensure that the top evaporation box 1 can fully evaporate. A rotating rod 11 is connected to the bottom of the support rod 8, and a plurality of auxiliary stirring rods 12 are connected to the outer side of the rotating rod 11. The bottom of the rotating rod 11 extends to the exhaust pipe 10 and is connected to an auger blade 13. The auger blade 13 can be used to uniformly transport the inside of the exhaust pipe 10 downward, and the crystals produced by evaporation and concentration and the crystals hung by the scraper can be transported into the spiral feed pipe 14, so as to uniformly transport the crystals outward. An exhaust pipe 18 is connected to the top of the evaporation box 1, and an exhaust valve 19 is connected to the exhaust pipe 18.
[0017] A first temperature sensor 16 and a pressure sensor 17 are connected to the top of the evaporator 1. The exhaust valve 19 is preferably an electrically controlled valve. By being electrically connected to the pressure sensor 17, when the pressure is too high, the exhaust valve 19 can be controlled to discharge steam outward.
[0018] The middle of the wastewater preheating box 2 is an external high-temperature exhaust gas pipeline 21. The top of the wastewater preheating box 2 is connected with a sewage input pipe 22. The sewage input pipe 22 extends into the wastewater preheating box 2 and is connected with a water delivery coil 23 that wraps the high-temperature exhaust gas pipeline 21. The rear side of the water delivery coil 23 is connected with the water supply pipe 4. Because the sulfur-containing exhaust gas in the prior art is mostly high-temperature exhaust gas, the heat loss can be reduced by directly contacting the sewage with the exhaust pipe for heat conduction. There is also power generation by heat exchange with the exhaust pipe in the prior art, but the design of the whole process is There are many preparations and steps, high cost and high loss, so the present application adopts the method of directly exchanging heat between the desulfurized wastewater and the front-end high-temperature exhaust gas, which can reduce the stability of the exhaust gas and preheat the wastewater, thereby ensuring the overall energy consumption reduction and cost reduction. The water adding pipe 4 is connected to a second temperature sensor 20, and the sewage input pipe 22 is connected to an electrically controlled flow control valve 24 electrically connected to the second temperature sensor 20. The input temperature is sensed by the second temperature sensor 20. If it is not fully preheated, the input flow of the wastewater can be reduced by the electrically controlled flow control valve 24.
[0019] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.
Claims
1. A flue gas evaporation and concentration device for desulfurization wastewater, comprising an evaporation box (1), the top of the evaporation box (1) is connected to a sealed top cover (3), the bottom of the evaporation box (1) is connected to a heater (5), characterized in that: The top of the sealing top cover (3) is connected to a water supply pipe (4) and a driving motor (6); the water supply pipe (4) is externally connected to a wastewater preheating box (2); the bottom power end of the driving motor (6) is connected to a supporting shaft (7) extending to the top of the evaporation box (1); the bottom sides of the supporting shaft (7) are connected to supporting rods (8); the bottom of the supporting rods (8) are connected to a scraper (9) close to the evaporation box (1); the bottom of the evaporation box (1) is connected to a waste pipe (10); the bottom of the waste pipe (10) is connected to a spiral feed pipe (14); the rear side of the spiral feed pipe (14) is connected to a servo motor (15); the top of the evaporation box (1) is connected to an exhaust pipe (18); the exhaust pipe (18) is connected to an exhaust valve (19).
2. A desulfurization wastewater flue gas evaporation concentration device according to claim 1, characterized in that: The bottom of the support rod (8) is connected to a rotating rod (11), the outer side of the rotating rod (11) is connected to a plurality of auxiliary stirring rods (12), and the bottom of the rotating rod (11) extends into the waste discharge pipe (10) and is connected to an auger blade (13).
3. A desulfurization wastewater flue gas evaporation concentration device according to claim 1, characterized in that: A first temperature sensor (16) and a pressure sensor (17) are connected to the top of the evaporator box (1).
4. A desulfurization wastewater flue gas evaporation concentration device according to claim 1, characterized in that: The middle of the wastewater preheating box (2) is an external high-temperature exhaust gas pipeline (21), and the top of the wastewater preheating box (2) is connected to a sewage input pipe (22). The sewage input pipe (22) extends into the wastewater preheating box (2) and is connected to a water delivery coil (23) that wraps the high-temperature exhaust gas pipeline (21). The rear side of the water delivery coil (23) is connected to a water supply pipe (4).
5. A desulfurization wastewater flue gas evaporation concentration device according to claim 4, characterized in that: The water supply pipe (4) is connected to a second temperature sensor (20), and the sewage input pipe (22) is connected to an electrically controlled flow control valve (24) electrically connected to the second temperature sensor (20).