阅读说明：本技术 一种针对脱硫废水污泥的真空法脱水系统 (Vacuum dehydration system for desulfurization wastewater sludge ) 是由 霍延明 曹维 李小健 于 2021-06-21 设计创作，主要内容包括：本发明公开了一种针对脱硫废水污泥的真空法脱水系统,其特征在于,包括除尘模块,所述除尘模块包括雾化喷枪,所述喷枪接有存放团聚剂溶液的储存罐和空气压缩机,所述除尘模块可以使废气中飞灰颗粒能被溶液有效润湿,达到除尘除尘效果；输送模块,通过所述除尘模块后进入输送模块。本发明,混合模块中对所述石膏浆液分配箱分配石膏浆液和脱硫废水澄清器底部的污泥掺混的比例进行控制,控制范围使石膏中重金属不能超标,同时通过真空泵产生的真空将混合浆液中的水分脱除,经过脱水处理后的石膏成品变为水泥、石膏板等行业的原材料,实现再利用,减少危险废弃物处理的费用及环保风险。(The invention discloses a vacuum dehydration system for desulfurization wastewater sludge, which is characterized by comprising a dust removal module, wherein the dust removal module comprises an atomization spray gun, the spray gun is connected with a storage tank for storing an aggregating agent solution and an air compressor, and the dust removal module can effectively wet fly ash particles in waste gas by the solution to achieve the dust removal effect; and the conveying module enters the conveying module after passing through the dust removal module. According to the invention, the mixing module controls the mixing proportion of the gypsum slurry distributed by the gypsum slurry distribution box and the sludge at the bottom of the desulfurization wastewater clarifier, the control range enables heavy metals in the gypsum not to exceed the standard, meanwhile, the vacuum generated by the vacuum pump removes water in the mixed slurry, and a gypsum finished product after dehydration is changed into raw materials in industries such as cement and gypsum board, so that the reutilization is realized, and the cost for dangerous waste treatment and the environmental protection risk are reduced.)

1. A vacuum dehydration system for desulfurization wastewater sludge, comprising:

the dust removal module comprises an atomization spray gun, the spray gun is connected with a storage tank for storing an aggregating agent solution and an air compressor, and the dust removal module can effectively wet fly ash particles in the waste gas by the solution to achieve the dust removal effect;

the conveying module enters the conveying module after passing through the dust removal module, the conveying module comprises a sludge conveying pump, and the conveying module conveys sludge at the bottom of the desulfurization wastewater clarifier;

the mixing module enters the mixing module after passing through the conveying module, the mixing module comprises a gypsum slurry distribution box and a vacuum belt slurry distribution box, and the gypsum slurry distribution box distributes gypsum slurry to the vacuum belt slurry distribution box to be mixed with sludge at the bottom of the desulfurization wastewater clarifier and then distributes the mixture to enter the dehydration module;

the dehydration module enters the dehydration module after passing through the mixing module, the dehydration module comprises a vacuum belt dehydrator mechanism, a vacuum pump, a gas-liquid separator, a filtrate tank and a hose, and the dehydration module removes water in the mixed slurry;

and the wastewater filtering and circulating module enters the wastewater filtering and circulating module after passing through the dehydration module, and collects and recycles water generated in the gas-liquid separator.

2. The vacuum dewatering system for desulfurized wastewater sludge according to claim 1, it is characterized in that the agglomerant solution adopts 0.05 percent of aqueous solution prepared by XTG plus SDS with 0.01 percent of mass fraction and desulfurization waste water and 0.1 percent of aqueous solution prepared by XTG plus SDS with 0.01 percent of mass fraction and desulfurization waste water, the additive is used for reducing the surface tension of the solution, so that fly ash particles can be effectively wetted by the solution, the agglomeration of fine particles is promoted, the dedusting efficiency is enhanced, meanwhile, the additive acts to inhibit chloride ion corrosion and reduce the corrosivity of the desulfurization wastewater, the arrangement position of the atomizing spray gun is usually selected in front of the dust removing equipment, if the atomizing spray gun is too close to the dust removing equipment, the water in the solution is not completely evaporated and then enters the dust removing equipment, further damage can be caused to the atomizing spray gun, so that the arrangement distance of the atomizing spray gun is required to be larger than the complete evaporation distance of the water in the solution; the water evaporation calculation formula is as follows:

the total heat exchanged between time τ -0 and time τ is:

adopting a lumped parameter method:

and:

in the formula (I), the compound is shown in the specification,

t ∞: ambient temperature;

t: a termination temperature;

t 0: an initial temperature;

h: water vapor thermal conductivity.

3. The vacuum dewatering system for wastewater and sludge generated by desulfurization according to claim 1, wherein the mixing module controls the mixing ratio of the gypsum slurry distributed by the gypsum slurry distribution box and the sludge at the bottom of the desulfurization wastewater clarifier, and the control range is such that the heavy metals in the gypsum cannot exceed the standard.

4. The vacuum dehydration system to desulfurization waste water mud of claim 1, characterized in that, vacuum belt hydroextractor mechanism includes real empty room (1), the top fixed mounting of real empty room (1) has sealed lubrication groove (2), the top fixed mounting of sealed lubrication groove (2) has friction area (3), rubber band (4) have been placed at the top of friction area (3), guiding gutter (5) have been seted up on the surface of rubber band (4), the top demountable installation of rubber band (4) has filter cloth (6), the top demountable installation of filter cloth (6) has gypsum filter cake (7), the bottom fixed mounting of rubber band (4) has perforated plate (8), the bottom fixed mounting of perforated plate (8) has air box (9).

5. The vacuum dewatering system for desulphurized waste water sludge according to claim 4, characterized in that a draining tank is opened on the side of the rubber belt (4) and is located on the top of the vacuum chamber (1), the inside of the sealed lubricating tank (2) is filled with lubricating water, and the conveyed gypsum suspension in the mixing module flows through the top of the gypsum filter cake (7).

6. The vacuum dewatering system for desulphurized waste water sludge according to claim 4, wherein the waste water filtration cycle module comprises a filter cloth filter cake flushing water tank, a waste water cyclone feed tank, a filtrate water tank and a filter cloth flushing water pump, wherein water in the filter cloth filter cake flushing water tank is recycled water after filter cloth, rubber belt and funnel flushing water; the filter cloth flushing water pump is used for cleaning filter cloth and a belt of the vacuum dehydrator and recovering cleaning water, sealing lubricating water in the sealing lubricating groove (2) is sucked from the rubber belt (4) and the filter cloth filter cake flushing water tank through the rubber belt (4) and the filter cloth flushing water pump, and the filter cloth filter cake flushing water tank is used for providing flushing water of a gypsum filter cake (7) for the vacuum belt dehydrator so that the content of chloride ions in a gypsum product is in a designed range.

7. The vacuum dewatering system for wastewater sludge desulfurization according to claim 4, characterized in that the filtrate flows through the diversion trench (5) to the draining trench opened in the middle of the vacuum chamber (1) and then flows to the hole in the vacuum chamber (1), the vacuum chamber (1) is connected with the filtrate pipe and the hose, the filtrate pipe is connected with the gas-liquid separator, and the vacuum pump is connected with the gas-liquid separator to generate the vacuum degree required by the whole vacuum system.

Technical Field

The invention relates to the technical field of operation of a desulfurization system of a thermal generator set, in particular to a vacuum dehydration system for desulfurization wastewater sludge.

Background

In the waste water that thermal power produced at present, contain a large amount of sulphur mixtures, the sulphide not only has very big pollution to the environment, also has very big harm to people's production life, consequently must carry out desulfurization treatment to discharged waste water, and the mud that desulfurization waste water produced is because of containing the harmful material to the environment such as a large amount of heavy metals, belongs to dangerous waste, handles comparatively difficultly for the power plant, and most is handled through filling up, also has some producers to adopt frame plate pressure filter or centrifugal desliming machine to handle.

However, these treatment methods are limited to a certain extent, the landfill treatment method occupies resources, causes environmental pollution and increases enterprise cost, and the hazardous waste formed by treatment by using the frame plate filter press or the centrifugal desliming machine needs to be scientifically treated to prevent possible environmental hazards, which may cause certain cost.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a vacuum dehydration system for desulfurization wastewater sludge.

In order to achieve the purpose, the invention adopts the following technical scheme:

a vacuum dewatering system for desulphurised waste water sludge comprising:

the dust removal module comprises an atomization spray gun, the spray gun is connected with a storage tank for storing an aggregating agent solution and an air compressor, and the dust removal module can effectively wet fly ash particles in the waste gas by the solution to achieve the dust removal effect;

the conveying module enters the conveying module after passing through the dust removal module, the conveying module comprises a sludge conveying pump, and the conveying module conveys sludge at the bottom of the desulfurization wastewater clarifier;

the mixing module enters the mixing module after passing through the conveying module, the mixing module comprises a gypsum slurry distribution box and a vacuum belt slurry distribution box, and the gypsum slurry distribution box distributes gypsum slurry to the vacuum belt slurry distribution box to be mixed with sludge at the bottom of the desulfurization wastewater clarifier and then distributes the mixture to enter the dehydration module;

the dehydration module enters the dehydration module after passing through the mixing module, the dehydration module comprises a vacuum belt dehydrator mechanism, a vacuum pump, a gas-liquid separator, a filtrate tank and a hose, and the dehydration module removes water in the mixed slurry;

and the wastewater filtering and circulating module enters the wastewater filtering and circulating module after passing through the dehydration module, and collects and recycles water generated in the gas-liquid separator.

Preferably, the agglomerating agent solution adopts an aqueous solution prepared from XTG + SDS with the mass fraction of 0.01% and desulfurization wastewater with the mass fraction of 0.05%, and an aqueous solution prepared from XTG + SDS with the mass fraction of 0.01% and desulfurization wastewater with the mass fraction of 0.1%, the additive is used for reducing the surface tension of the solution, so that fly ash particles can be effectively wetted by the solution, the fine particle agglomeration is promoted, the dedusting efficiency is enhanced, meanwhile, the additive is used for inhibiting chloride ion corrosion and reducing the corrosivity of the desulfurization wastewater, the arrangement position of the atomizing spray gun is usually selected in front of the dedusting equipment, if the atomizing spray gun is too close to the dedusting equipment, the water in the solution is not completely evaporated and enters the dedusting equipment, and further damage is caused to the solution, and therefore, the arrangement distance of the atomizing spray gun is required to be greater than the complete evaporation distance of the water in the solution. The water evaporation calculation formula is as follows:

the total heat exchanged between time τ -0 and time τ is:

adopting a lumped parameter method:

and:

in the formula (I), the compound is shown in the specification,

t ∞: ambient temperature;

t: a termination temperature;

t 0: an initial temperature;

h: water vapor thermal conductivity;

preferably, the mixing module controls the mixing proportion of the gypsum slurry distributed by the gypsum slurry distribution box and the sludge at the bottom of the desulfurization waste water clarifier, and the control range ensures that heavy metals in the gypsum cannot exceed the standard.

Preferably, vacuum belt hydroextractor mechanism includes real empty room, real empty room's top fixed mounting has sealed lubrication groove, the top fixed mounting in sealed lubrication groove has the friction area, the rubber tape has been placed at the top in friction area, the guiding gutter has been seted up on the surface of rubber tape, the top demountable installation in rubber tape has the filter cloth, the top demountable installation of filter cloth has the gypsum filter cake, the bottom fixed mounting in rubber tape has the perforated plate, the bottom fixed mounting of perforated plate has the air tank.

Preferably, a draining groove is formed in the side surface of the rubber belt, the draining groove is located at the top of the vacuum chamber, lubricating water is filled in the sealed lubricating groove, and the conveyed gypsum suspension in the mixing module flows through the top of the gypsum filter cake;

the filter cloth on the rubber belt rotates after running over the driving wheel, the conveyed gypsum filter cake leaves the filter cloth, the gypsum filter cake discharging roller has a section of contact arc, the filter cloth separates the filter cloth and is fed into the discharging groove, the filter cloth is fed into the gypsum bin from the discharging groove, the system is provided with a scraping blade to assist in removing the filter cake, after the gypsum filter cake is discharged, the filter cloth is guided to pass through a cleaning section and the filter cloth deviation rectifying roller, and the filter cloth deviation rectifying roller prevents the filter cloth from deviating in the running process.

Preferably, the wastewater filtering and circulating module comprises a filter cloth filter cake flushing water tank, a wastewater cyclone feeding tank, a filtrate water tank and a filter cloth flushing water pump, wherein water in the filter cloth filter cake flushing water tank is recycled water after filter cloth, a rubber belt and funnel flushing water; the filter cloth flushing water pump is used for cleaning and recovering cleaning water for the filter cloth and the belt of the vacuum dehydrator, sealing lubricating water in the sealing lubricating groove is sucked from the rubber belt and the filter cloth filter cake flushing water tank through the rubber belt and the filter cloth flushing water pump, and the filter cloth filter cake flushing water tank is used for providing flushing water for the gypsum filter cake for the vacuum belt dehydrator so that the content of chloride ions in a gypsum product is in a designed range;

wherein air entrained in the filtrate is separated in the gas-liquid separator, the filtrate flows by gravity to the filtrate water tank, the air is discharged into the atmosphere by the vacuum pump, and the water collected in the gas-liquid separator is discharged to the filtrate water tank.

Preferably, the filtrate flows through the diversion trench toward the draining trench formed in the middle of the vacuum chamber and then flows into the hole in the vacuum chamber, the vacuum chamber is connected with the filtrate pipe and the hose, the filtrate pipe is connected with the gas-liquid separator, the vacuum pump is connected with the gas-liquid separator, and the vacuum degree required by the whole vacuum system is generated;

the vacuum pump is connected with the gas-liquid separator to generate the required vacuum degree of the whole vacuum system, and the mixture of the filtrate and air enters the gas-liquid separator through the vacuum chamber, the hose and the filtrate pipe.

Compared with the prior art, the invention has the beneficial effects that:

1. the desulfurization waste water and sludge of the hazardous waste are uniformly mixed into the gypsum, so that the recycling is realized, and the cost and the environmental protection risk of hazardous waste treatment are reduced.

2. The device realizes the standby of desulfurization wastewater sludge removal equipment, and reduces the influence on the desulfurization safety operation when the equipment fails.

3. Reduce the electricity cost and labor cost generated by independently operating the frame plate filter press or the centrifugal desliming machine.

4. Realize water resource recycling, save the operation cost and protect the environment at the same time.

Drawings

FIG. 1 is a schematic structural diagram of a vacuum dewatering system for desulfurization waste water sludge according to the present invention;

FIG. 2 is a schematic view of a vacuum belt dehydrator of the vacuum dehydration system for wastewater and sludge desulfurization according to the present invention.

In the figure: 1. a vacuum chamber; 2. sealing the lubricating groove; 3. a friction belt; 4. a rubber belt; 5. a diversion trench; 6. filtering cloth; 7. a gypsum filter cake; 8. a perforated plate; 9. an air box.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-2, a vacuum dewatering system for desulphurized waste water sludge comprising:

the dust removal module comprises an atomization spray gun, the spray gun is connected with a storage tank for storing an aggregating agent solution and an air compressor, and fly ash particles in the waste gas can be effectively wetted by the solution, so that the dust removal effect is achieved;

the conveying module enters the conveying module after passing through the dust removal module, the conveying module comprises a sludge conveying pump, and the conveying module conveys sludge at the bottom of the desulfurization wastewater clarifier;

the mixing module enters the mixing module after passing through the conveying module, the mixing module comprises a gypsum slurry distribution box and a vacuum belt slurry distribution box, and the gypsum slurry distribution box distributes gypsum slurry to the vacuum belt slurry distribution box to be mixed with sludge at the bottom of the desulfurization wastewater clarifier and then distributes the mixture to the dehydration module;

the dehydration module enters the dehydration module after passing through the mixing module, the dehydration module comprises a vacuum belt dehydrator mechanism, a vacuum pump, a gas-liquid separator, a filtrate tank and a hose, and the dehydration module removes water in the mixed slurry;

and the wastewater filtering and circulating module enters the wastewater filtering and circulating module after passing through the dehydration module, and the wastewater filtering and circulating module collects and recycles water generated in the gas-liquid separator.

The agglomerating agent solution is an aqueous solution prepared from XTG mass percent, 0.01 mass percent of SDS and desulfurization wastewater and 0.1 mass percent of XTG mass percent, 0.01 mass percent of SDS and desulfurization wastewater, the additive is used for reducing the surface tension of the solution, so that fly ash particles can be effectively wetted by the solution, fine particulate matter agglomeration is promoted, the dust removal efficiency is enhanced, meanwhile, the additive is used for inhibiting chloride ion corrosion and reducing the corrosivity of the desulfurization wastewater, the arrangement position of the atomizing spray gun is usually selected in front of dust removal equipment, if the atomizing spray gun is too close to the dust removal equipment, water in the solution is not completely evaporated and enters the dust removal equipment, and further the dust removal equipment is damaged, and therefore, the arrangement distance of the atomizing spray gun is required to be larger than the complete evaporation distance of the water in the solution. The water evaporation calculation formula is as follows:

the total heat exchanged between time τ -0 and time τ is:

adopting a lumped parameter method:

and:

in the formula (I), the compound is shown in the specification,

t ∞: ambient temperature;

t: a termination temperature;

t 0: an initial temperature;

h: coefficient of heat conductivity of water vapor

The mixing module controls the mixing proportion of the gypsum slurry distributed by the gypsum slurry distribution box and the sludge at the bottom of the desulfurization wastewater clarifier, and the control range ensures that heavy metals in the gypsum cannot exceed the standard.

As shown in fig. 2, vacuum belt dehydrator mechanism includes real empty room 1, real empty room 1's top fixed mounting has sealed lubrication groove 2, sealed lubrication groove 2's top fixed mounting has friction area 3, rubber band 4 has been placed at friction area 3's top, guiding gutter 5 has been seted up on rubber band 4's surface, rubber band 4's top demountable installation has filter cloth 6, filter cloth 6's top demountable installation has gypsum filter cake 7, rubber band 4's bottom fixed mounting has perforated plate 8, perforated plate 8's bottom fixed mounting has air box 9.

As shown in fig. 2, a draining groove is opened on the side surface of the rubber belt 4, the draining groove is positioned at the top of the vacuum chamber 1, the inner side of the sealed lubricating groove 2 is filled with lubricating water, and the conveyed gypsum suspension in the mixing module flows through the top of the gypsum filter cake 7.

The wastewater filtering and circulating module comprises a filter cloth filter cake flushing water tank, a wastewater cyclone feeding box, a filtrate water tank and a filter cloth flushing water pump, wherein water in the filter cloth filter cake flushing water tank is recycled water after filter cloth, a rubber belt and funnel flushing water; the filter cloth flushing water pump provides cleaning for the filter cloth and the belt of the vacuum dehydrator and recovers cleaning water, sealing lubricating water in the sealing lubricating groove 2 is sucked from the rubber belt 4 and the filter cloth filter cake flushing water tank through the rubber belt 4 and the filter cloth flushing water pump, and the filter cloth filter cake flushing water tank provides flushing water for the vacuum belt dehydrator for the gypsum filter cake 7 so that the content of chloride ions in a gypsum product is in a designed range;

specifically, air entrained in the filtrate is separated in the gas-liquid separator, the filtrate flows to the filtrate water tank by gravity, the air is discharged into the atmosphere by the vacuum pump, and the water collected in the gas-liquid separator is discharged to the filtrate water tank.

The filtrate flows to a water leaching tank arranged in the middle of the vacuum chamber 1 through a diversion trench 5 and then flows to a hole in the vacuum chamber 1, the vacuum chamber 1 is connected with a filtrate pipe and a hose, the filtrate pipe is connected with a gas-liquid separator, and a vacuum pump is connected with the gas-liquid separator to generate the vacuum degree required by the whole vacuum system;

specifically, the filtrate flows through a water draining groove in the middle of a rubber belt of the diversion trench 5 and then flows into a hole of the vacuum chamber 1, the vacuum chamber 1 is connected with a filtrate pipe, the filtrate pipe is obliquely arranged on a frame of the vacuum belt dehydrator, the filtrate pipe is connected with a gas-liquid separator, the vacuum pump is connected with the gas-liquid separator to generate the required vacuum degree of the whole vacuum system, and the mixture of the filtrate and air enters the gas-liquid separator through the vacuum chamber 1, a hose and the filtrate pipe.

According to the invention, the mixing module controls the mixing proportion of the gypsum slurry distributed by the gypsum slurry distribution box and the sludge at the bottom of the desulfurization wastewater clarifier, the control range enables heavy metals in the gypsum not to exceed the standard, meanwhile, the vacuum generated by the vacuum pump removes water in the mixed slurry, and a gypsum finished product after dehydration is changed into raw materials in industries such as cement, gypsum board and the like, so that the reutilization is realized, and the cost for dangerous waste treatment and the environmental protection risk are reduced; separating air clamped in filtrate in a gas-liquid separator, enabling the filtrate to flow to a filtrate water tank by gravity, discharging the air into the atmosphere through a vacuum pump, discharging the water collected in the gas-liquid separator to the filtrate water tank, wherein a wastewater filtering circulation module comprises a filter cloth filter cake flushing water tank, a wastewater cyclone feeding tank, the filtrate water tank and a filter cloth flushing water pump, and the water in the filter cloth filter cake flushing water tank is the recycled water after filter cloth, a rubber belt and funnel flushing water; the filter cloth washing water pump provides cleaning and recycling cleaning water for the filter cloth and the belt of the vacuum dehydrator, so that water resource circulation is realized, the operation cost is reduced, the water resource is saved, the sewage discharge is prevented, and the environment is protected.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.