CN206843269U - A kind of processing unit of heat-engine plant desulfurized wastewater zero discharge - Google Patents

Abstract

The utility model discloses a kind of processing unit of heat-engine plant desulfurized wastewater zero discharge, including three header medicament sofening treatment devices, resin sofening treatment device, reverse osmosis treatment device, MED evaporated crystallization devices, drying device and crystal salt packing device, three header medicament sofening treatment devices, resin sofening treatment device, reverse osmosis treatment device, MED evaporated crystallization devices, drying device and crystal salt packing device are sequentially communicated by pipeline.The processing unit softens by using medicament and resin softens to obtain the desulfurization wastewater of soft, the impurity and heavy metal in soft desulfurization wastewater are filtered out by reverse-osmosis treated again, crystallization finally is evaporated to free from foreign meter and heavy metal soft desulfurization wastewater, finally gives crystal salt.Handled at this in device and method, it is not necessary to outwards discharge any liquid, and the solid matters such as the impurity in desulfurization wastewater and heavy metal can be efficiently separated with liquid, solid matter is easy to subsequent treatment.

Description

A kind of processing unit of heat-engine plant desulfurized wastewater zero discharge

Technical field

It the utility model is related to field of waste water treatment, more particularly to a kind of processing dress of heat-engine plant desulfurized wastewater zero discharge Put.

Background technology

The method of existing limestone scrubbing FGD flue gas desulfurization technique, its initial cost and operating cost are higher, water consumption Greatly, floor space is bigger than other techniques, is difficult to use this kind of skill in the case of the not reserved desulfurization place of existing power plant Art.As water consumption rich and influential family, its water consumption accounts for the 30%~40% of industrial water consumption for thermal power plant, and the water consumption of annual thermal power plant is in Upper body trend, while wastewater discharge also increases year by year, it is thermal power plant's Sustainable Development Road really to realize waste water zero emission.

Domestic most common method for treating desulfurized wastewater is chemical precipitation method at present, and this method is to utilize physics, chemistry side Method is by neutralizing, settling, the means such as clarification of flocculating remove most suspended substances, heavy metal ion etc. in desulfurization wastewater makes desulfurization Waste water reaches the existing discharge standard of country.Still containing the Ca being dissolved in waste water in waste water after treatment by using the treatment method²⁺、 Mg²⁺、Cl^-、SO₄ ^2-Etc. the salinity of high concentration, if directly discharge length can have a strong impact on to surrounding water generation for a long time.

After desulfurization wastewater is using chemical precipitation method processing, part index number difficulty up to standard, even if after processing up to standard, due to waste water In substantial amounts of sulfate and chloride presence, water outlet salt content is still up to 2%~4%, it is difficult to reuse, can also after outer row Cause surface water and soil ecology to destroy, cause secondary pollution.Therefore, the research and development of desulfurization wastewater zero discharge treatment technology are increasingly It is taken seriously.

Utility model content

In order to solve the above technical problems, the utility model devises a kind of processing dress of heat-engine plant desulfurized wastewater zero discharge Put.

The utility model adopts the following technical scheme that：

A kind of processing unit of heat-engine plant desulfurized wastewater zero discharge, including three header medicament sofening treatment devices, resin are soft Change processing unit, reverse osmosis treatment device, MED evaporated crystallization devices, drying device and crystal salt packing device, three header medicaments Sofening treatment device, resin sofening treatment device, reverse osmosis treatment device, MED evaporated crystallization devices, drying device and crystal salt Packing device is sequentially communicated by pipeline, and three header medicament sofening treatment devices include neutralizing case, settling tank, flocculation tanks, clarification Pond and water tank, neutralize case, settling tank, flocculation tanks, depositing reservoir and water tank and be sequentially communicated by pipeline.

In the processing unit of the heat-engine plant desulfurized wastewater zero discharge, three header medicament sofening treatment devices include neutralize case, Settling tank and flocculation tanks, depositing reservoir, water tank, are separately added into milk of lime（Ca(OH)₂）, organic sulfur（TMT15）, flocculant （FeClSO₄/Na₂CO₃）, flocculation aid（PAM- polyacrylamides）, hydrochloric acid（HCl）；Neutralize in case and add milk of lime（Ca(OH)₂）, The pH value adjustment of desulfurization wastewater is carried out, the acid-base neutralization reaction of neutralisation treatment is then carried out, removes relevant ions material.Settling tank Middle addition organic sulfur（TMT15）, organic sulfur compound is added to desulfurization wastewater, corresponding insoluble P matter can be generated, so as to Reach the purpose for removing heavy metal ion.Flocculant is added in flocculation tanks（FeClSO₄/Na₂CO₃）, the flocculant typically added has FeClSO₄, and add corresponding flocculation aid in outlet place（PAM）, colloid and the floccule of other materials formation can be made It is more easy to precipitate, while accelerates the precipitation of other hydroxide and sulfide, the suspension in desulfurization wastewater is all obtained corresponding position Reason, is convenient for last integrated treatment.Hydrochloric acid is added in water tank（HCl）, the pH value of water quality is 6-9 in adjusting water outlet case, The water purification of upper part just can be outwards transported to follow-up work after pH value detection and suspension content detection are up to standard by clarified water pump Skill；

The main body of resin sofening treatment device is ion exchange resin, because the hardness of water is mainly formed by calcium, magnesium, therefore one As use cationic ion-exchange resin, Ca2+, Mg2+ in water are cemented out, counter-infiltration is also known as reverse osmosis, and one kind is with pressure differential For motive force, the UF membrane that solvent is isolated from solution operates.Because it is in opposite direction with naturally osmotic, therefore claim reverse osmosis Thoroughly.According to the different osmotic of various materials, it is possible to using the reverse osmosis pressure more than osmotic pressure, i.e. hyperfiltration, reach The purpose of separation, extraction, purifying and concentration；MED evaporative crystallizations, evaporation refer to allow the solvent in solution by way of heating The process of solvent release solute；Crystallization is the process that solute polymerization is changed into solid；Drying equipment is also known as drier and drying machine；With In the equipment that operation is dried, the hygroscopic water in material is set to vaporize effusion by heating, to obtain the solids for providing water capacity Material；Crystal salt packing device, the device packed to the dried material in drying device.

Compared with prior art, three header medicament sofening treatment devices in the utility model, resin sofening treatment device, anti- Infiltration processing unit, MED evaporated crystallization devices, drying device and crystal salt packing device, the single assembly of these devices are all Existing equipment, but the processing unit of heat-engine plant desulfurized wastewater zero discharge of the present utility model combines three header medicament sofening treatments Device, resin sofening treatment device, reverse osmosis treatment device, MED evaporated crystallization devices, drying device and crystal salt packaging dress Put, realize heat-engine plant desulfurized wastewater zero discharge, the processing unit softens by using medicament and resin softens to obtain soft Desulfurization wastewater, then filter out by reverse-osmosis treated the impurity and heavy metal in soft desulfurization wastewater, finally to without The soft desulfurization wastewater of impurity and heavy metal is evaporated crystallization, finally gives crystal salt.Handled at this in device and method, Any liquid need not be outwards discharged, and can be effective by the solid matters such as the impurity in desulfurization wastewater and heavy metal and liquid Separation, solid matter are easy to subsequent treatment.

Brief description of the drawings

Fig. 1 is a kind of structural representation of the present utility model；

In figure：1st, three header medicament sofening treatment device, 2, resin sofening treatment device, 3, reverse osmosis treatment device, 4, MED evaporated crystallization devices, 5, drying device, 6, crystal salt packing device.

Embodiment

Below by specific embodiment, and with reference to accompanying drawing, the technical solution of the utility model is made further specifically to retouch State：

Embodiment：As shown in Figure 1, a kind of processing unit of heat-engine plant desulfurized wastewater zero discharge, including three header medicaments Sofening treatment device 1, resin sofening treatment device 2, reverse osmosis treatment device 3, MED evaporated crystallization devices 4, the and of drying device 5 Crystal salt packing device 6, three header medicament sofening treatment devices, resin sofening treatment device, reverse osmosis treatment device, MED steam Hair crystallization apparatus, drying device and crystal salt packing device are sequentially communicated by pipeline, three header medicament sofening treatment device bags Include and neutralize case, settling tank, flocculation tanks, depositing reservoir and water tank, neutralize case, settling tank, flocculation tanks, depositing reservoir and water tank and pass through Pipeline is sequentially communicated.

The processing unit of heat-engine plant desulfurized wastewater zero discharge of the present utility model combines three header medicament sofening treatments dress Put, resin sofening treatment device, reverse osmosis treatment device, MED evaporated crystallization devices, drying device and crystal salt packing device, Realize heat-engine plant desulfurized wastewater zero discharge, the processing unit using when by using medicament softening and resin soften to obtain it is low hard The desulfurization wastewater of degree, then impurity and heavy metal in soft desulfurization wastewater are filtered out by reverse-osmosis treated, finally to not Impure and heavy metal soft desulfurization wastewater is evaporated crystallization, finally gives crystal salt.Device and method is handled herein In, it is not necessary to any liquid is outwards discharged, and can be by the solid matters such as the impurity in desulfurization wastewater and heavy metal and liquid Efficiently separate, solid matter is easy to subsequent treatment.

Embodiment described above is a kind of preferable scheme of the present utility model, not the utility model is made any Formal limitation, there are other variants and remodeling on the premise of without departing from the technical scheme described in claim.

Claims (1)

1. a kind of processing unit of heat-engine plant desulfurized wastewater zero discharge, it is characterized in that, the heat-engine plant desulfurized wastewater zero discharge Processing unit includes three header medicament sofening treatment devices, resin sofening treatment device, reverse osmosis treatment device, MED evaporation knots Brilliant device, drying device and crystal salt packing device, three header medicament sofening treatment devices, resin sofening treatment device, reverse osmosis Saturating processing unit, MED evaporated crystallization devices, drying device and crystal salt packing device are sequentially communicated by pipeline, three header medicines Agent sofening treatment device includes neutralizing case, settling tank, flocculation tanks, depositing reservoir and water tank, neutralizes case, settling tank, flocculation tanks, clear Clear pond and water tank are sequentially communicated by pipeline.