CN205873939U - Device that contains heavy metal ion waste water is handled to microwave fluidized bed - Google Patents

Abstract

The utility model relates to a device for treating waste water containing heavy metal ions by a microwave fluidized bed, which belongs to the technical field of waste water treatment and comprises a raw material tank and a fluidized bed. The outlet of the raw material tank is connected to a feed pump, and the feed pump is connected to the fluidized bed through a pipeline , there is a steam outlet on the top of the fluidized bed, a raw material distribution plate connected to the feed pump through pipelines is set above the raw material tank, a thermocouple and a microwave source are set on the shell of the fluidized bed below the raw material distribution plate, and the liquid distribution plate There is a hot air distribution plate below, the hot air distribution plate is connected to the hot air heater through the pipe, the steam outlet is connected to the heat exchanger through the pipe, the heat exchanger is connected to the hot air heater, the condenser and the fan, and the other end of the condenser is connected to the distilled water collection tank. The utility model has a simple structure, uses a microwave fluidized bed, and has a fast heating speed, and hot air is introduced at the bottom of the fluidized bed, so that the evaporation effect is better and there is no residue, and the heat energy is recycled and reused through the heat exchanger, saving energy .

Description

Microwave fluidized bed treatment device for wastewater containing heavy metal ions

technical field

The utility model belongs to the technical field of waste water treatment, in particular to a device for treating waste water containing heavy metal ions by a microwave fluidized bed.

Background technique

With the rapid development of my country's industry, the output of heavy metal wastewater is increasing. These wastewaters mainly come from mine drainage, waste rock leaching water, mine tailings drainage, non-ferrous metal smelting plant drainage, non-ferrous metal processing plant pickling wastewater, electroplating factory plating washing water, iron and steel plant pickling drainage and electrolysis, pesticides , pharmaceuticals, paints and dyes and other industrial wastewater. How to efficiently treat these heavy metal wastewater and make it a resource has become a common concern of people. Evaporation is one of the effective ways to treat wastewater containing heavy metal ions. As one of the important chemical unit operations, evaporation is a technology that uses heating to partially vaporize the water or volatile solvent in the solution in the boiling state, and then realize condensation and concentration in the condenser. Therefore, the evaporation process is a heat transfer process, and the heat transfer efficiency and rate are the control links of the evaporation process. For metallurgy and chemical industry, evaporation is also one of the operating units with the largest energy consumption.

At present, evaporation equipment can be divided into single-effect, multi-effect, secondary vapor compression, multi-stage flash, multi-effect multi-stage flash, etc. The efficiency of single-effect evaporation is low. In order to improve the evaporation efficiency, evaporation equipment is gradually developing into multi-effect evaporation. The multi-effect evaporation system is more complicated. The three-effect evaporation requires three pumps, three evaporation tanks, and three sets of heat exchange systems. Moreover, these devices need to withstand high temperature and pressure, and the manufacturing cost is relatively high.

Whether it is multi-effect evaporation, flash evaporation or a combination of the two methods, there are still some core problems that need to be solved. First of all, the heat required for evaporation mainly comes from heat exchange, and the heat source usually used is steam heat exchange; no matter what kind of heat exchange device is used, there is a large amount of heat loss. Secondly, the heat exchanger needs to withstand the high temperature and high pressure impact of hot steam and the corrosion of materials, which seriously affects the stable operation of the equipment. Third, the impurity components in the solution are prone to fouling on the wall of the heat exchanger, causing a sharp drop in heat transfer efficiency and a sharp increase in energy consumption.

Therefore, microwave fluidized bed is commonly used to treat heavy metal wastewater, but the electromagnetic field distribution of microwave treatment is uneven, resulting in high local temperature and large fluctuations, which affects the evaporation effect, and the heat after treatment cannot be recycled, resulting in energy waste.

Utility model content

The purpose of the utility model is to provide a microwave fluidized bed treatment device for wastewater containing heavy metal ions to solve the above problems.

The utility model microwave fluidized bed treatment device for waste water containing heavy metal ions comprises a raw material tank and a fluidized bed, the outlet of the raw material tank is connected to a feed pump, the feed pump is connected to the fluidized bed through a pipeline, and a purifier is arranged inside the raw material tank , there is a steam outlet on the top of the fluidized bed, a raw material distribution plate connected to the feed pump through a pipeline is set above the raw material tank, raw material nozzles are evenly distributed under the raw material distribution plate, a demister is set above the raw material distribution plate, and the raw material distribution plate The shell of the fluidized bed below is provided with a thermocouple and a microwave source, a number of liquid distribution plates are provided under the fluidized bed, a hot air distribution plate is provided under the liquid distribution plate, and a hot air distribution nozzle is provided above the hot air distribution plate. The bottom of the hot air distribution plate is connected to the hot air heater through pipes, the steam outlet is connected to the heat exchanger through pipes, the heat exchanger is connected to the hot air heater, the condenser and the fan, and the other end of the condenser is connected to the distilled water collection tank.

An insulating layer is provided between the fluidized bed and the microwave source.

The heat exchanger includes a coil, one end of the coil is connected to the steam outlet through a pipe, and the other end extends out of the heat exchanger to connect with the condenser. One end protrudes from the heat exchanger and is connected with the hot air heater, which can fully perform heat exchange and reduce energy waste.

Compared with the prior art, the utility model has the following beneficial effects:

The structure is simple, the microwave fluidized bed is used, the heating speed is fast, and the hot air is introduced at the bottom of the fluidized bed, so that the evaporation effect is better and there is no residue, and the heat energy is recovered and reused through the heat exchanger, which saves energy.

Description of drawings

Fig. 1 is the structural representation of the utility model;

In the figure: 1. Raw material tank, 2. Purifier, 3. Feed pump, 4. Hot air distribution plate, 5. Hot air distribution nozzle, 6. Liquid distribution plate, 7. Thermocouple, 8. Microwave source, 9. Raw material Nozzle, 10. Raw material distribution plate, 11. Fluidized bed, 12. Demister, 13. Steam outlet, 14. Fan, 15. Heat exchanger, 16. Heat exchange tube, 17. Coil, 18. Condenser , 19, distilled water collection tank, 20, hot air heater.

detailed description

Below in conjunction with embodiment the utility model is further described.

The device for treating waste water containing heavy metal ions by a microwave fluidized bed as shown in Figure 1 includes a raw material tank 1 and a fluidized bed 11, the outlet of the raw material tank 1 is connected to a feed pump 3, and the feed pump 3 is connected to the fluidized bed 11 through a pipeline A purifier 2 is arranged under the inside of the raw material tank 1, a steam outlet 13 is arranged on the top of the fluidized bed 11, a raw material distribution plate 10 connected to the feed pump 3 through a pipeline is arranged above the raw material tank 1, and the raw material distribution plate 10 is evenly distributed There are raw material nozzles 9, a demister 12 is arranged above the raw material distribution plate 10, a thermocouple 7 and a microwave source 8 are arranged on the housing of the fluidized bed 11 below the raw material distribution plate 10, and several A liquid distribution plate 6, a hot-air distribution plate 4 is arranged below the liquid distribution plate 6, a hot-air distribution nozzle 5 is arranged above the hot-air distribution plate 4, a hot-air heater 20 is connected to the bottom of the hot-air distribution plate 4, and a steam outlet 13 is connected to a heat exchanger through a pipeline. Heater 15, heat exchanger 15 are connected with hot air heater 20, condenser 18 and fan 14, and the other end of condenser 18 is connected with distilled water collection tank 19.

An insulating layer is provided between the fluidized bed 11 and the microwave source 8 .

The heat exchanger 15 includes a coil tube 17, one end of the coil tube 17 is connected to the steam outlet 13 through a pipe, and the other end extends out of the heat exchanger 15 to connect with the condenser 18. The inside of the coil tube 17 is sleeved with a heat exchange tube 16 for heat exchange One end of the pipe 16 is connected to the blower fan 14, and the other end extends out of the heat exchanger 15 and is connected to the hot air heater 20, which can fully perform heat exchange and reduce energy waste.

In summary, the utility model has a simple structure, uses a microwave fluidized bed, and has a fast heating speed, and hot air is passed through the bottom of the fluidized bed, so that the evaporation effect is better and there is no residue, and the heat energy is recovered and reused through the heat exchanger. Utilization saves energy.

Claims (2)

1. a device for microwave fluidized bed processing heavy metal ion-containing waste water, including head tank (1) and fluid bed (11), raw material Tank (1) exit connects feed pump (3), and feed pump (3) connects fluid bed (11) by pipeline, and head tank (1) lower inside sets Being equipped with depurator (2), fluid bed (11) top is provided with steam (vapor) outlet (13), it is characterised in that head tank (1) is provided above The feed distribution dish (10) being connected with feed pump (3) by pipeline, feed distribution dish (10) lower section is evenly distributed with raw material nozzles (9), feed distribution dish (10) is provided above demister (12), on the housing of the fluid bed (11) of feed distribution dish (10) lower section Being provided with thermocouple (7) and microwave source (8), fluid bed (11) lower inside is provided with several liquid distributing boards (6), and liquid divides Fabric swatch (6) lower section is provided with hot blast distributing disc (4), and hot blast distributing disc (4) is provided above hot blast distribution nozzles (5), and hot blast divides Cloth dish (4) lower section connects storage heater (20) by pipeline, and steam (vapor) outlet (13) connects heat exchanger (15), heat exchange by pipeline Device (15) is connected with storage heater (20), condenser (18) and blower fan (14), and condenser (18) other end connects distilled water and receives Collection tank (19), described heat exchanger (15) includes coil pipe (17), coil pipe (17) one end by pipeline connect steam (vapor) outlet (13), another End stretches out heat exchanger (15) inside and is connected with condenser (18), and the internal sleeve of coil pipe (17) is connected to heat exchanger tube (16), heat exchanger tube (16) one end connecting fan (14), the other end stretch out heat exchanger (15) and are connected with storage heater (20).

The device of microwave fluidized bed processing heavy metal ion-containing waste water the most according to claim 1, it is characterised in that described It is provided with heat-insulation layer between fluid bed (11) and microwave source (8).