Wet flue gas desulfurization waste water treatment system waste water supply technique
Technical field
The invention belongs to the technical field of wet process of FGD Equipments Setting, be specifically related to a kind of waste water supply technique for wet process of FGD field Waste Water Treatment.
Background technology
In wet method fume desulfurizing system, along with the passing of running time, chlorine ion concentration can constantly rise, and heavy metal also can enrichment, thus relevant device in corrosion desulphurization system affect gypsum qualitt.Be not corroded to protect desulphurization system and reduce the content of beary metal in gypsum, Waste Water Treatment must be entered by a certain amount of desulfurization wastewater of periodic exhaustion, the chlorion in desulphurization system and heavy metal concentration are maintained in tolerance interval.The Waste Water Treatment waste water supply technique that this field is traditional is at present as follows: gypsum slurries access gypsum rotational flow station, whole filtrates that the major part of gypsum eddy flow overflow and underflow produce after vacuum belt machine all enter reuse water tank, return desulphurization system reuse, the overflow of sub-fraction gypsum rotational flow station is had to be access in waste-water vortex station service tank, deliver to waste-water vortex station by waste-water vortex station supply pump and carry out cyclonic separation again, waste-water vortex station underflow enters reuse water tank, return desulphurization system reuse, overflow enters storage of waste water case, supply Waste Water Treatment.This technological problems is: overflow solid content in waste-water vortex station is about 3.0%, and a large amount of gypsum is brought into Waste Water Treatment, can increase the solid loading of Waste Water Treatment, increasing device capacity requirement, increases investment cost; For reaching treatment effect, a large amount of medicament need be added, improve operating cost; Meanwhile, containing heavy metal and medicament in the gypsum patty will produced after Waste Water Treatment agent-feeding treatment, can not comprehensive reutilization be carried out, can only landfill be transported outward, solid waste amount be increased, causes the wasting of resources.
Summary of the invention
In order to the problem that the waste water solid content overcoming Waste Water Treatment supply is high, the present invention proposes a kind of Waste Water Treatment waste water supply technique for wet process of FGD field.This technology utilization vacuum belt dewaterer one-level filtrate, as the source water of Waste Water Treatment, reduces the solid loading of Waste Water Treatment, reduces system investments and operating cost, reduces the generation of solid waste.Concrete technical scheme is:
A kind of wet flue gas desulfurization waste water treatment system waste water supply system, by gypsum rotational flow station, vacuum belt dewaterer, one-level filtrate receiving magazine, secondary filtrate receiving magazine, storage of waste water case, waste water delivery pump, vavuum pump forms, gypsum slurries enters the charging aperture of gypsum rotational flow station, the overfall of gypsum rotational flow station is connected with the top of reuse water tank, the underflow of gypsum rotational flow station is connected with the charging aperture of vacuum belt dewaterer, the filtrate pipe of vacuum belt dewaterer is divided into two parts by vacuum insulation panel, be connected with the first half of one-level filtrate receiving magazine with secondary filtrate receiving magazine respectively, the bottom of one-level filtrate receiving magazine is connected with the Lower Half of storage of waste water case, the entrance of waste water delivery pump is connected with the Lower Half of storage of waste water case, waste water conveying delivery side of pump is connected with Waste Water Treatment, the bottom of secondary filtrate receiving magazine is connected with the Lower Half of reuse water tank, the slurries of reuse water tank return desulphurization system reuse.
Utilize above-mentioned wet flue gas desulfurization waste water treatment system waste water supply system to supply a method for waste water, comprise the steps:
A. gypsum rotational flow station (2) overflow slurry is all accessed reuse water tank (10), return desulphurization system reuse;
B. the filtrate pipe of vacuum belt dewaterer (3) is divided into two sections by vacuum insulation panel (9), one-level filtrate filtrate being divided into dilute without gypsum patty will flushing water (11) and the secondary filtrate two parts diluted through gypsum patty will flushing water (11);
C. by one-level filtrate access storage of waste water case (6), be then transported to desulfurization wastewater treatment system by waste water delivery pump (7) and process.
The present invention is by the improvement of wet flue gas desulfurization waste water treatment system waste water supply technique, eliminate the setting of waste-water vortex station, waste-water vortex station service tank and pump, decrease the capacity of Waste Water Treatment and the dosage of medicament simultaneously, reduce investment and operating cost.In addition, enter the reduction of waste water solid content in Waste Water Treatment, the generation of solid waste can be reduced, avoid the wasting of resources.
Accompanying drawing explanation
Fig. 1 is the structural representation of wet flue gas desulfurization waste water treatment system waste water feeding mechanism of the present invention;
The implication of each Reference numeral in figure: 1-gypsum slurries; 2-gypsum rotational flow station; 3-vacuum belt dewaterer; 4-one-level filtrate receiving magazine; 5-secondary filtrate receiving magazine; 6-storage of waste water case; 7-waste water delivery pump; 8-vavuum pump; 9-vacuum insulation panel; 10-reuse water tank; 11-gypsum patty will flushing water.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1, wet flue gas desulfurization waste water treatment system waste water feeding mechanism of the present invention is made up of gypsum rotational flow station 2, vacuum belt dewaterer 3, one-level filtrate receiving magazine 4, secondary filtrate receiving magazine 5, storage of waste water case 6, waste water delivery pump 7, vavuum pump 8, wherein, gypsum slurries 1 enters the charging aperture of gypsum rotational flow station 2, the overfall of gypsum rotational flow station 2 is connected with the top of reuse water tank 10, the underflow of gypsum rotational flow station 2 is connected with the charging aperture of vacuum belt dewaterer 3, the filtrate pipe of vacuum belt dewaterer 3 is divided into two parts by vacuum insulation panel 9, every part is connected with the first half of one-level filtrate receiving magazine 4 with secondary filtrate receiving magazine 5 respectively, the bottom of one-level filtrate receiving magazine 4 is connected with the Lower Half of storage of waste water case 6, the entrance of waste water delivery pump 7 is connected with the Lower Half of storage of waste water case 6, the outlet of waste water delivery pump 7 is connected with Waste Water Treatment, the bottom of secondary filtrate receiving magazine 5 is connected with the Lower Half of reuse water tank 10, the slurries of reuse water tank 10 return desulphurization system reuse.
Waste Water Treatment waste water Supply Method is:
A. gypsum rotational flow station 2 overflow slurry is all accessed reuse water tank 10, return desulphurization system reuse;
B. vacuum belt dewaterer 3 filtrate pipe is divided into two sections by vacuum insulation panel 9, makes filtrate be divided into without the one-level filtrate of gypsum patty will flushing water 11 dilution and the secondary filtrate two parts through gypsum patty will flushing water 11 dilution;
C. by one-level filtrate access storage of waste water case 6, be then transported to desulfurization wastewater treatment system by waste water delivery pump 7 and process.
Wet flue gas desulfurization waste water treatment system waste water supply technological process is that the underflow produced after gypsum slurries 1 enters gypsum rotational flow station 2 delivers to vacuum belt dewaterer 3, the filtrate pipe of vacuum belt dewaterer 3 is divided into two sections by vacuum insulation panel 9, filtrate is divided into and rinses water-reducible one-level filtrate without gypsum patty will and rinse water-reducible secondary filtrate two parts through gypsum patty will, access one-level filtrate receiving magazine 4 and secondary filtrate receiving magazine 5 respectively, one-level filtrate receiving magazine 4 is connected with storage of waste water case 6, one-level filtrate is delivered to Waste Water Treatment by the source water as Waste Water Treatment and is processed.One-level filtrate solid content is about 1%, and the concentration of chlorion, heavy metal etc. is not diluted, just in time be suitable as the source water of Waste Water Treatment, both reduced the solid loading of Waste Water Treatment, system investments and operating cost, additionally reduce the generation of Waste Water Treatment solid waste.