CN205856236U - A kind of wet flue gas desulfurization waste water processing means - Google Patents

Abstract

This utility model provides a kind of wet flue gas desulfurization waste water processing means, belong to technical field of waste water processing, including flocculant container and the chilling scrubbing tower, swollen drum strainer, oxidation tank and the accurate filter that are sequentially communicated by pipeline, pipeline between chilling scrubbing tower and swollen drum strainer is mixing duct, flocculant container connects with mixing duct, oxidation tank is provided with air inlet, is provided with agitator in oxidation tank, and chilling scrubbing tower is provided with smoke air inlet.Its simple in construction, use cost is low, it is possible to realize brine waste zero emission, has good economic benefit and social benefit.

Description

A kind of wet flue gas desulfurization waste water processing means

Technical field

This utility model relates to technical field of waste water processing, processes in particular to a kind of wet flue gas desulfurization waste water Device.

Background technology

The wet flue gas desulfurizer overwhelming majority of current domestic operation uses disposable sodium alkali desulfurization technology, and alkali cleaning takes off Sulfur technique has that equipment is simple, small investment, efficiency advantages of higher, but pollutant simply transfer to liquid phase from gas phase, and outer row is a large amount of Brine waste, defines secondary pollution；Although another part device is capable of efflux wastewater not saliferous, but this apparatus structure Complexity, use cost is high.

Utility model content

The purpose of this utility model embodiment is to provide a kind of wet flue gas desulfurization waste water processing means, preferably improves The problems referred to above.

Embodiment of the present utility model is achieved in that

Embodiment of the present utility model provides a kind of wet flue gas desulfurization waste water processing means, including flocculant container with And chilling scrubbing tower, swollen drum strainer, oxidation tank and the accurate filter being sequentially communicated by pipeline, described chilling scrubbing tower And the pipeline between described swollen drum strainer is mixing duct, described flocculant container connects with described mixing duct, described Oxidation tank is provided with air inlet, is provided with agitator in described oxidation tank, and described chilling scrubbing tower is provided with smoke air inlet.

Optionally, described swollen drum strainer includes filter body, clear liquid case, filter bag and support, and described filter is originally Internal portion is provided with filter chamber, and described filter bag is arranged in described filter chamber, and described support is arranged on inside described filter bag, described clearly Liquid case removably connects with described filter body, and described clear liquid case connects with described filter bag.

Optionally, described mixing duct is provided with circulating pump, and described circulating pump is positioned at described chilling scrubbing tower and described wadding Between solidifying agent container, the port of export of described circulating pump also connects with described chilling scrubbing tower.

Optionally, described wet flue gas desulfurization waste water processing means also includes concentration tank, belt vacuum filter and overflow Pond, described concentration tank is led to described concentration tank by pipeline communication, described belt vacuum filter with described swollen drum strainer Piping connects, and described concentration tank and described belt vacuum filter all pass through pipeline communication with described run-off.

Optionally, described wet flue gas desulfurization waste water processing means also includes that alkali tank, described alkali tank lead to described oxidation tank Piping connection and pipeline are provided with lye pump, and the port of export of described lye pump also connects with described alkali tank.

Optionally, the pipeline between described oxidation tank and described accurate filter is provided with surge tank, described surge tank and institute Stating the pipeline between accurate filter and be additionally provided with force (forcing) pump, the port of export of described force (forcing) pump also connects with described surge tank.

Optionally, described wet flue gas desulfurization waste water processing means also includes neutralizing tank and acid tank, described accurate filter With described neutralizing tank by pipeline communication, described acid tank and described neutralizing tank are by pipeline communication, described acid tank and described neutralization Pipeline between tank is provided with acid-proof pump.

Optionally, connect also by reflux line between described chilling scrubbing tower and described swollen drum strainer, described swollen Liquid in drum strainer can enter in described chilling scrubbing tower from described reflux line.

Optionally, being provided with agitator and submerged pump in described run-off, described submerged pump is by pipeline and described cripling formula Filter connects.

Optionally, described support includes conical section or segmental arc, described conical section or described segmental arc composition corrugated cage Frame.

Embodiment of the present utility model has the advantages that

1, this utility model simple in construction, use cost is low, has good economic benefit and social benefit；

2, chilling scrubbing tower can preferably remove the particulate matter in flue gas or sulfide, it is ensured that flue gas can row up to standard Put；

3, the flocculant in flocculant container can make the particulate matter in waste liquid flocculate into flocculation in swollen drum strainer Body；Swollen drum strainer can carry out fast filtering to the waste liquid after flocculation, it is achieved solid-liquid separation, makes total suspension of efflux wastewater Thing content is less than 50mg/L；

4, the inferior sulfate radical in waste liquid can be aoxidized by oxidation tank, reduces COD, and oxidation tank can also be used to remove calcium Magnesium ion；

5, the waste liquid of calcium-magnesium-containing precipitation can be filtered by accurate filter, removes swollen drum strainer simultaneously and does not removes Particulate matter.

Accompanying drawing explanation

In order to be illustrated more clearly that the technical scheme of this utility model embodiment, will use required in embodiment below Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiment of the present utility model, the most should be by Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, also may be used To obtain other relevant accompanying drawings according to these accompanying drawings.

Fig. 1 is the structural representation of wet flue gas desulfurization waste water processing means of the present utility model；

Fig. 2 is the structural representation of swollen drum strainer.

In figure, reference is:

Chilling scrubbing tower 101, flocculant container 102, swollen drum strainer 103, oxidation tank 104, accurate filter 105, Mixing duct 106, air inlet 107, alkali tank 108, lye pump 109, neutralizing tank 110, acid tank 111, acid-proof pump 112, circulating pump 113, concentration tank 114, run-off 115, submerged pump 116, belt vacuum filter 117, surge tank 118, force (forcing) pump 119, flue gas Air inlet 120；

Filter body 201, clear liquid case 202, filter bag 203, support 204, filter chamber 205.

Detailed description of the invention

For making the purpose of this utility model embodiment, technical scheme and advantage clearer, new below in conjunction with this practicality Accompanying drawing in type embodiment, is clearly and completely described the technical scheme in this utility model embodiment, it is clear that retouched The embodiment stated is a part of embodiment of this utility model rather than whole embodiments.Generally described in the accompanying drawing herein and The assembly of this utility model embodiment illustrated can be arranged with various different configurations and design.

Therefore, below the detailed description of the embodiment of the present utility model provided in the accompanying drawings is not intended to limit requirement The scope of the present utility model of protection, but it is merely representative of selected embodiment of the present utility model.Based in this utility model Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all Belong to the scope of this utility model protection.

It should be noted that in the case of not conflicting, the embodiment in this utility model and the feature in embodiment can To be mutually combined.

It should also be noted that similar label and letter represent similar terms, therefore, the most a certain Xiang Yi in following accompanying drawing Individual accompanying drawing is defined, then need not it be defined further and explains in accompanying drawing subsequently.

In description of the present utility model, it should be noted that the orientation of the instruction such as term " interior ", " bottom " or position are closed System is for based on orientation shown in the drawings or position relationship, or the orientation usually put when this utility model product uses or position Put relation, or the orientation that usually understands of those skilled in the art or position relationship, or this utility model product uses Time the orientation usually put or position relationship, be for only for ease of description this utility model and simplifying describe rather than instruction or Hint indication device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that To restriction of the present utility model.

In description of the present utility model, in addition it is also necessary to explanation, unless otherwise clearly defined and limited, term " sets Put ", should be interpreted broadly " installation ", " connection ", connect for example, it may be fixing, it is also possible to be to removably connect, or integratedly Connect；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition Language concrete meaning in this utility model.

Refer to shown in Fig. 1, embodiment one of the present utility model provides a kind of wet flue gas desulfurization waste water processing means, Including chilling scrubbing tower 101, flocculant container 102, swollen drum strainer 103, oxidation tank 104 and accurate filter 105.

Refer to shown in Fig. 2, swollen drum strainer 103 includes filter body 201, clear liquid case 202, filter bag 203 and props up Frame 204, filter body 201 is internal is provided with filter chamber 205, and filter bag 203 is arranged in filter chamber 205, and support 204 is arranged on filter Bag 203 is internal, and clear liquid case 202 removably connects with filter body 201, and clear liquid case 202 connects with filter bag 203.

Support 204 includes conical section or segmental arc, conical section or segmental arc composition corrugated cage.

It should be noted that chilling scrubbing tower 101 is provided with smoke air inlet 120.The operation principle of chilling scrubbing tower 101 is such as Under: in chilling scrubbing tower 101, first load cleaning mixture, then pending flue gas is passed through chilling scrubbing tower 101 and carries out urgency Cold saturated, the SO in flue gas simultaneously_xAbsorbed by the cleaning mixture in chilling scrubbing tower 101.To be washed by the amount controlling efflux wastewater Washing liquid to concentrate, the concentration of control cleaning mixture is between 10%-20%, and cleaning mixture will not occur crystalline polamer, preferably protects Demonstrate,prove desulfurization process normal operation, so that flue gas can qualified discharge.

Refer to shown in Fig. 1, chilling scrubbing tower 101 is connected, so by mixing duct 106 with swollen drum strainer 103 The waste liquid discharged in chilling scrubbing tower 101 can be flowed in swollen drum strainer 103 with blended pipeline 106.

In order to enable the particulate matter in waste liquid to flocculate into floccule body in swollen drum strainer 103, need to cripling formula Flocculant is added in filter 103.Therefore, it can flocculant container 102 to connect with mixing duct 106, can be to use here Pipeline connects flocculant container 102 with mixing duct 106.Flow after so waste liquid mixes in mixing duct 106 with flocculant Entering in swollen drum strainer 103, the waste liquid being mixed into flocculant can be filtered by swollen drum strainer 103 so that solid-liquid Isolated clear liquid and mud.Mixing container can certainly be set on mixing duct 106, then flocculant container 102 With mix reservoir, the flocculant in flocculant container 102 can be transported to mix in container, such chilling scrubbing tower 101 The waste liquid of interior discharge and flocculant are transported to swollen drum strainer 103 again after mixing in mixing container and filter.

Swollen drum strainer 103 passes through pipeline communication with oxidation tank 104.The quantity of oxidation tank 104 can be according to actual water Matter, the water yield determine, can arrange an oxidation tank 104, it is also possible to arrange multiple oxidation tank 104, when there being multiple oxidation tank 104 Time, multiple oxidation tanks 104 can be connected in series, it is also possible to is connected in parallel.Clear liquid in swollen drum strainer 103 can be transported to In oxidation tank 104.Inferior sulfate radical in clear liquid can be aoxidized by oxidation tank 104, reduces COD (COD).

It should be noted that oxidation tank 104 is provided with air inlet 107, in oxidation tank 104, it is provided with air sparger and stirring Device.Air can be passed through for the inferior sulfate radical clear liquid is aoxidized from the air inlet 107 of oxidation tank 104.Oxidation tank 104 In agitator the oxidation reaction of liquid in oxidation tank 104 can be made more abundant.

In order to the calcium ions and magnesium ions in clear liquid in removing oxidation tank 104, alkali liquor can be added in oxidation tank 104.For This, can arrange alkali tank 108, and alkali tank 108 can hold alkali liquor, and alkali tank 108 and oxidation tank 104 are by pipeline communication, alkali tank 108 And lye pump 109 can be set on the pipeline between oxidation tank 104.The port of export of lye pump 109 can connect with alkali tank 108, So can preferably protect lye pump 109, when the hypertonia of lye pump 109 port of export, the alkali of lye pump 109 port of export Liquid can be back in alkali tank 108, thus reduces the pressure of lye pump 109 port of export, substantially increases the use of lye pump 109 Life-span.

The exit of oxidation tank 104 is additionally provided with online pH value analyser.The liquid discharged from oxidation tank 104 can be detected constantly The pH value of body.

Oxidation tank 104 and accurate filter 105 pass through pipeline communication.Accurate filter 105 can filter out swollen further The solid particulate matter that drum strainer 103 has not filtered.

It should be noted that accurate filter 105 filtering accuracy in the present embodiment is high, it is possible to remove 1 μm and above Granule.

The waste water given off from accurate filter 105 is alkalescence, could meet subsequent evaporation crystal system after needing to neutralize Requirement, so need the waste water given off from accurate filter 105 is neutralized process, making waste water is neutrality.Therefore, need Neutralizing tank 110 to be arranged, neutralizing tank 110 is connected with accurate filter 105 by pipeline, there is provision of acid tank 111, acid tank simultaneously 111 are connected with neutralizing tank 110 by pipeline, and the pipeline between acid tank 111 and neutralizing tank 110 is provided with acid-proof pump 112.Neutralizing tank The exit of 110 is additionally provided with online pH value analyser, it is possible to detect the pH value of the liquid discharged from neutralizing tank 110 constantly.

In order to reduce cost, the utilization rate of raising cleaning mixture, the cleaning mixture in chilling scrubbing tower 101 can be circulated and make With.Therefore, it can arrange circulating pump 113 in the outside of chilling scrubbing tower 101, the entrance point of circulating pump 113 and the port of export all with Chilling scrubbing tower 101 passes through pipeline communication.In the present embodiment, circulating pump 113 is arranged on mixing duct 106, circulating pump 113 Between chilling scrubbing tower 101 and flocculant container 102.The waste liquid part discharged from the port of export of circulating pump 113 is transported to In swollen drum strainer 103, a part is back in chilling scrubbing tower 101.

Swollen drum strainer 103 can produce in the course of the work a large amount of mud (solid particulate matter containing large quantity of moisture or Dust), if directly the mud containing large quantity of moisture is expelled directly out, be not only inconvenient to transport, also can be to environment.For This, need the mud filtering out swollen drum strainer 103 to carry out processed, can arrange concentration tank 114, concentration tank 114 pass through pipeline communication with swollen drum strainer 103.The mud that swollen drum strainer 103 filters out is flowed into by pipeline In concentration tank 114, concentration tank 114 can carry out natural subsidence to mud, makes solid-liquid separation, in order to make solid-liquid separation effect more Good, agitator can be set in concentration tank 114, agitator passes through driven by motor.Then can be the solid in concentration tank 114 Discharge with liquid.Because the sludge moisture content after Chen Jiang is less, mobility is poor, so the mud after Chen Jiang is not easy from concentration In tank 114 discharge, can concentration tank 114 bottom electric mud valve is set.Mud can also be set in concentration tank 114 Liquidometer, it is simple to the sludge quantity settled in grasping concentration tank 114, when mud reaches certain depth, opens electric mud valve, Mud is discharged.

The water resource separated for Appropriate application concentration tank 114, and the water separating concentration tank 114 carries out Filtering further, can arrange run-off 115, run-off 115 and concentration tank 114 are by pipeline communication, and concentration tank 114 is isolated The water come can be discharged in run-off 115.Certainly the water in run-off 115 can also be re-delivered to swollen drum strainer Filter in 103, swollen drum strainer 103 can also be rinsed, it is ensured that swollen drum strainer 103 will not be dirty simultaneously Mud blocks, thus ensures that equipment runs well.Submerged pump 116, submerged pump 116 and cripling formula can be set in run-off 115 Filter 103 is by pipeline communication, and submerged pump 116 can be transported to the water in run-off 115 in swollen drum strainer 103.

The liquid being discharged in run-off 115 is possibly together with fraction solids granule, and solid particle can be natural in run-off 115 Sedimentation, the particulate matter in order to make in run-off 115 in liquid tries one's best few being deposited in run-off 115, can be at run-off 115 Agitator is inside set.

The mud separated in concentration tank 114, possibly together with some moisture, for the ease of focusing on mud, makes dirt Moisture in mud is the fewest, can be dehydrated the mud that concentration tank 114 is discharged further.Belt vacuum can be set Filter 117, the electric mud valve bottom belt vacuum filter 117 and concentration tank 114 passes through pipeline communication.Belt vacuum mistake Sludge moisture content after filter 117 filters is relatively low, can directly transport, and is placed into appointment position.Belt vacuum filter 117 mistake The water obtained after filter can be transported to swollen drum filter by submerged pump 116 the most again by discharge of pipes to run-off 115 Device 103 filters.

Pipeline between oxidation tank 104 and accurate filter 105 is provided with surge tank 118, surge tank 118 and accurate filter Being additionally provided with force (forcing) pump 119 on pipeline between 105, the port of export of force (forcing) pump 119 also connects with surge tank 118.When force (forcing) pump 119 During the hypertonia of the port of export, the liquid of force (forcing) pump 119 port of export can be back in surge tank 118, thus reduce force (forcing) pump The pressure of 119 ports of export, substantially increases the service life of force (forcing) pump 119.

It should be noted that from the waste liquid of neutralizing tank 110 discharge possibly together with substantial amounts of salt, if brine waste is directly arranged Being put in environment can be to environment.Accordingly, it would be desirable to the liquid discharged from neutralizing tank 110 is evaporated, concentrates, ties Brilliant, it is achieved brine waste zero emission and the recycling of inorganic salt.

Evaporative crystallization technique may select multiple-effect evaporation, MVR or heat pump techniques.

It should be noted that the quantity of swollen drum strainer 103 can be two, two swollen drum strainers 103 are in parallel Connecting, and by Valve controlling, a job, another is standby, when a Delta to saturated need to carry out backwash time, be switched to Another, the swollen drum strainer 103 after backwash is standby.

It should be noted that the operation principle of swollen drum strainer 103 is as follows: when swollen drum strainer 103 is in work During state, filtrate to be filtered inputs from chilling scrubbing tower 101, and under the pressure effect of filtrate, filter bag 203 tightens, and is attached to support On 204 corrugated, filter bag 203 on corrugated stake body retains in filtrate solid matter at its outer surface；When recoiling During state, due to quickly opening of end valve, the slurry of bottom in swollen drum strainer 103 is made to begin to rehearse at a high speed, filter bag 203 outer space Between form negative pressure and filter bag 203 in backwash liquid cause pressure reduction.And by being full of clear liquid in filter bag 203, filter bag 203 is in expansion shape State, is formed as more piece drum type outwardly, make attached amass in the formed bridge structure layer geometry of the filtering residue outside filter bag 203 quick Change and easily come off.Moreover filter bag 203 is in expansion state, the micropore of filter medium also in expansion state, stifled in micropore Plug thing the most relatively easy cleaning.And due to cage to open sky rate high, increase effective filtration area, substantially increase filtration effect Rate.

The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for this For the technical staff in field, this utility model can have various modifications and variations.All in spirit of the present utility model and principle Within, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.

Claims (10)

1. a wet flue gas desulfurization waste water processing means, it is characterised in that include flocculant container and pass through pipeline successively Chilling scrubbing tower, swollen drum strainer, oxidation tank and the accurate filter of connection, described chilling scrubbing tower and described cripling formula mistake Pipeline between filter is mixing duct, and described flocculant container connects with described mixing duct, and described oxidation tank is provided with air inlet Mouthful, it being provided with agitator in described oxidation tank, described chilling scrubbing tower is provided with smoke air inlet.

Wet flue gas desulfurization waste water processing means the most according to claim 1, it is characterised in that described swollen drum strainer Including filter body, clear liquid case, filter bag and support, being provided with filter chamber inside described filter body, described filter bag is arranged on In described filter chamber, described support is arranged on inside described filter bag, and described clear liquid case removably connects with described filter body, Described clear liquid case connects with described filter bag.

Wet flue gas desulfurization waste water processing means the most according to claim 1, it is characterised in that set on described mixing duct Have circulating pump, described circulating pump between described chilling scrubbing tower and described flocculant container, the port of export of described circulating pump Also connect with described chilling scrubbing tower.

Wet flue gas desulfurization waste water processing means the most according to claim 1, it is characterised in that described wet process of FGD Wastewater treatment equipment also includes concentration tank, belt vacuum filter and run-off, described concentration tank and described swollen drum strainer By pipeline communication, described belt vacuum filter and described concentration tank are by pipeline communication, described concentration tank and described belt Vacuum filter all passes through pipeline communication with described run-off.

Wet flue gas desulfurization waste water processing means the most according to claim 1, it is characterised in that described wet process of FGD Wastewater treatment equipment also includes that alkali tank, described alkali tank are provided with lye pump with described oxidation tank by pipeline communication and pipeline, institute The port of export stating lye pump also connects with described alkali tank.

Wet flue gas desulfurization waste water processing means the most according to claim 1, it is characterised in that described oxidation tank is with described Pipeline between accurate filter is provided with surge tank, and the pipeline between described surge tank and described accurate filter is additionally provided with pressurization Pump, the port of export of described force (forcing) pump also connects with described surge tank.

Wet flue gas desulfurization waste water processing means the most according to claim 1, it is characterised in that described wet process of FGD Wastewater treatment equipment also includes neutralizing tank and acid tank, and described accurate filter and described neutralizing tank are by pipeline communication, described acid Tank is provided with acid-proof pump with described neutralizing tank by pipeline communication, the pipeline between described acid tank and described neutralizing tank.

Wet flue gas desulfurization waste water processing means the most according to claim 1, it is characterised in that described chilling scrubbing tower and Connecting also by reflux line between described swollen drum strainer, the liquid in described swollen drum strainer can be from described backflow Pipeline enters in described chilling scrubbing tower.

Wet flue gas desulfurization waste water processing means the most according to claim 4, it is characterised in that be provided with in described run-off Agitator and submerged pump, described submerged pump is connected with described swollen drum strainer by pipeline.

Wet flue gas desulfurization waste water processing means the most according to claim 2, it is characterised in that described support includes cone Shape section or segmental arc, described conical section or described segmental arc composition corrugated cage.