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常用的污水處理技術(shù)有生物化學(xué)法，如活化污泥法（Activated Sludge Process），生物結(jié)層法（Fixed Biofilm Processes），混合生物法（Combined Biological Processes）等；物理化學(xué)法，如粒質(zhì)過濾法(Granular Media Filtration)，活化炭吸附法（Activated Carbon Adsorption），化學(xué)沉淀法（Chemical Precipitation），膜濾/析法（Membrane Processes）等；自然處理法，如穩(wěn)定塘法（Stabilization Ponds），氧化溝法 (Aerated or Facultative Lagoons），人工濕地法（Constructed Wetlands），化學(xué)色可賽思樹脂處理法.納濾膜分離原理

 鋼鐵廠廢水處理回用工程方案

  一 鋼鐵廠廢水處理工程概況

該鋼廠形成600萬噸/年生產(chǎn)規(guī)模時(shí)，平均排水量將達(dá)到4000m?/h。廢水處理工程設(shè)計(jì)平均日處理能力9.6萬米3，夏季最大日處理能力10.8萬米3,其中70%作為工業(yè)補(bǔ)水回到廠區(qū)管網(wǎng)，其余達(dá)標(biāo)后排放。

  該廢水處理回用工程于2010年4月開工建設(shè)，20012年1月主體結(jié)構(gòu)完工，2012年5月試運(yùn)行，2012年8月交付生產(chǎn)。工程占地29500㎡，新建建、構(gòu)筑物占地8041㎡，綠化覆蓋率32%，靜態(tài)投資為8643萬元。

  廠區(qū)全部廢水經(jīng)處理后達(dá)到排放標(biāo)準(zhǔn)，其中回用水經(jīng)軟化、過濾、消毒等深度處理后，達(dá)到生產(chǎn)用水標(biāo)準(zhǔn)。

 二 處理工藝

  1 廢水設(shè)計(jì)水質(zhì)

本工程原水屬典型的冶金工業(yè)廢水，處理后外排出水要求達(dá)到地方排放標(biāo)準(zhǔn)中的二級(jí)標(biāo)準(zhǔn)。本工程設(shè)計(jì)進(jìn)水水質(zhì)見下表：

                         設(shè)計(jì)廢水綜合水質(zhì)

序號(hào) 水質(zhì)指標(biāo) 指標(biāo)數(shù)值 備注

1  pH值 7.0~8.5

2  SS/（mg/L）  ＜200

3  COD/（mg/L） ＜150

4  BOD/（mg/L） ＜40

5  石油類/（mg/L） 10~20   通常為下限

6  總硬度/（mg/L） 300~480 以CaCO3計(jì)

7  暫時(shí)硬度/（mg/L）  250~350 以CaCO3計(jì)

8  鈣硬度/（mg/L） 120~220 以CaCO3計(jì)

9  總堿度/（mg/L） 250~350 以CaCO3計(jì)

10 含鹽量/（mg/L） 1100~1300

11 總鐵/（mg/L） ＜0.1

12 CI-/（mg/L） ＜260 一般為120~140

13 SO2-4/（mg/L）  190~220

14 F-/（mg/L）  3~5 

15 溫度/（mg/L） ＜35

廢水處理要求表見下圖：

                         廢水排放及回用限值

序號(hào) 水質(zhì)指標(biāo) 指標(biāo)數(shù)值 外排限值 備注

1  pH值 7.0~8.5 6~8.5  

2  SS/（mg/L）  ＜5  ＜30

3  COD/（mg/L） ＜30 ＜50

4  BOD/（mg/L） ＜10 ＜25

5  石油類/（mg/L） ＜2  ＜4 

6  總硬度/（mg/L） 200~300   以CaCO3計(jì)

7  暫時(shí)硬度/（mg/L）  ＜100   以CaCO3計(jì)

8  鈣硬度/（mg/L） ＜30   以CaCO3計(jì)

9  總堿度/（mg/L） ＜100   以CaCO3計(jì)

10 含鹽量/（mg/L） ＜1100     

11 總鐵/（mg/L） ＜0.1    

12 CI-/（mg/L） ＜130    

13 SO2-4/（mg/L）  ＜200    

14 F-/（mg/L）    3 

15 溫度/（mg/L） ＜35    

  本工程進(jìn)水為典型的鋼鐵工業(yè)廢水，有機(jī)污染物含量不高，可生化性差，不適宜采用生化方法降解。本項(xiàng)目主要采用物理化學(xué)法。作為工業(yè)補(bǔ)水，在回用水深度處理中增加去除暫時(shí)硬度、總堿度軟化、過濾、消毒等工藝。

廠區(qū)排出的工業(yè)廢水用管道輸送至廢水處理廠進(jìn)水口。經(jīng)過預(yù)處理部分，用粗、細(xì)格柵將來水中較大顆粒的漂浮物去除；再由提升泵到配水構(gòu)筑物，在此投加混凝劑和石灰以及硫酸，然后將廢水分配到高密度澄清池，除去水中的懸浮物和膠體物質(zhì)，保證水的澄清度，同時(shí)外排水還有除氟工藝�？傔M(jìn)水的70%經(jīng)高密度澄清池處理后，再經(jīng)V形濾池過濾并投加液氯消毒后，送往廠區(qū)作為工業(yè)水的補(bǔ)充水，總進(jìn)水的30%經(jīng)高密度澄清池處理至達(dá)標(biāo)后排放。                    

平面設(shè)計(jì)

  本工程占地面積29500㎡，南北向布置。廢水原水由西側(cè)進(jìn)入處理廠，經(jīng)處理后由北側(cè)回水泵房送入廠區(qū)作為補(bǔ)水。

 高程設(shè)計(jì)

  地面標(biāo)高作為處理系統(tǒng)的相對(duì)標(biāo)高±0.00.廢水只經(jīng)過預(yù)處理提升泵一次提升，此后處理工程靠重力流實(shí)現(xiàn)。

  根據(jù)本工程巖土工程勘察報(bào)告，重要的構(gòu)筑物如高密度澄清池、V形濾池、預(yù)處理單元等基礎(chǔ)落在卵石層上，地基土承受標(biāo)準(zhǔn)值400kPa；一般建筑物如綜合樓基礎(chǔ)落在黏質(zhì)粉土層上，地基土承受力標(biāo)準(zhǔn)值150kPa。

  主要構(gòu)筑物采用鋼筋混凝土結(jié)構(gòu)，變電所采用磚混結(jié)構(gòu)，電纜溝采用混凝土結(jié)構(gòu)。主要建、構(gòu)筑物設(shè)計(jì)下表

序號(hào) 名稱 容積或面積 數(shù)量/座 備注

1  綜合辦公樓 646㎡  1  鋼筋混凝土

2  調(diào)節(jié)池  2000m?  1  鋼筋混凝土

3  加藥間  868㎡  1  鋼筋混凝土

4  回用水泵房 4000m?  1  磚混

5  污泥處理系統(tǒng)  370㎡  1  鋼筋混凝土

6  高密度澄清池  1000㎡ 3  鋼筋混凝土

7  V形濾池 800㎡  4  鋼筋混凝土

8  總變電所 360㎡  1  磚混

  本工程包括預(yù)處理、高密度澄清池、加藥間、V形濾池、回水泵房和泥處理6個(gè)部分�？刂葡到y(tǒng)由基礎(chǔ)自動(dòng)化級(jí)和過程自動(dòng)化級(jí)組成�；A(chǔ)自動(dòng)化有QUANTUM系列PLC和檢測(cè)儀表組成。PLC之間通過FIPWAY網(wǎng)實(shí)現(xiàn)數(shù)據(jù)交換。FIPWAY網(wǎng)上掛有工業(yè)PC作為入機(jī)接口，完成對(duì)整個(gè)系統(tǒng)的監(jiān)控。過程自動(dòng)化級(jí)由高檔PENTIUM微機(jī)及打印機(jī)組成，完成對(duì)工藝過程的生產(chǎn)管理、數(shù)據(jù)設(shè)定、報(bào)表打印等功能，在中央控制室還設(shè)有大型模擬屏顯示全廠的水處理工藝流程。

2012年5月正式運(yùn)行，系統(tǒng)運(yùn)行穩(wěn)定，各項(xiàng)指標(biāo)均達(dá)到設(shè)計(jì)值。

該廠區(qū)廢水處理工程投資8643萬元，勞動(dòng)定員50人，裝機(jī)容量1800kW，運(yùn)行日耗點(diǎn)22000kW?h，藥費(fèi)0.12元/m?，年運(yùn)行費(fèi)1800萬元。噸水處理費(fèi)0.80元/m?。

濟(jì)寧天通設(shè)備有限公司是一家從事水處理設(shè)備生產(chǎn)、銷售集一體化的企業(yè)，經(jīng)過不斷的努力在國內(nèi)外獲得了供不應(yīng)求的大好市場，贏得了客戶的一致好評(píng)。

多年的發(fā)展歷程，公司始終堅(jiān)持創(chuàng)新、品質(zhì)、服務(wù)、敬業(yè)、感恩的理念。采納新創(chuàng)意，嚴(yán)格質(zhì)量，全方位的服務(wù)跟蹤，堅(jiān)持做出高品質(zhì)產(chǎn)品。

 我公司主要產(chǎn)品：水處理設(shè)備，污水處理設(shè)備、廢水處理設(shè)備、工業(yè)污水設(shè)備、農(nóng)業(yè)廢水設(shè)備、雨水凈水設(shè)備、醫(yī)院污水設(shè)備、鋼廠廢水設(shè)備、屠宰場廢水設(shè)備、食品廠廢水處理設(shè)備等多種設(shè)備，可根據(jù)要求專業(yè)定制水處理設(shè)備。

Commonly used water treatment technology for the physical and chemical method, such as Activated Sludge Process (Activated Sludge Process), Biological crusts method (Fixed Biofilm the Processes), hybrid Biological method (Combined in the Processes), etc.; Physical and Chemical method, such as grain mass Filtration (Granular Media Filtration), Activated Carbon Adsorption, Activated Carbon Adsorption), Chemical Precipitation method, Chemical Precipitation), Membrane filter/chromatography (be the Processes), etc.; Natural process, such as Stabilization pond (Stabilization Ponds), the oxidation ditch process (Aerated or Facultative Lagoons), the method of artificial wetland (Constructed Wetlands), chemical color ksetra-ksetrajna resin processing method. Nanofiltration membrane separation principle

Plant waste water treatment recycling project plan

An overview of wastewater treatment works in a steel plant

The average displacement of the steel plant will reach 4000m to the third/h when the steel plant is produced at 6 million tons/year. The average daily processing capacity of wastewater treatment works is 96,000 m 3, and the maximum daily processing capacity of the summer is 10.8000m 3. 70% of it is returned to the factory pipe network as industrial rehydration, and the remaining discharge after reaching the standard.

The waste water treatment recycling project started construction in April 2010. The main structure was completed in January, 20012. The trial operation was conducted in May 2012 and the production was delivered in August 2012. The project covers an area of 29500 ㎡, the new building and structures which covers an area of 8041 ㎡, green coverage of 32%, the static investment is 86.43 million yuan.

All waste water in the factory will meet the emission standard after treatment, and the water will reach the standard of production water after softening, filtering and disinfecting.

Two-process process

Wastewater design water quality

The original water of this project is a typical metallurgical industrial effluent, which is required to meet the secondary standard of local emission standard after treatment. The water quality of the engineering design is shown in the following table:

Design wastewater comprehensive water quality

Numerical value of the indicator of water quality indicators

1 pH 7.0 ~ 8.5

2 SS/(mg/L) < 200

3 COD/(mg/L) < 150

4 BOD/(mg/L) < 40

Oil/(mg/L) 10~20 is usually the lower limit

Total hardness/(mg/L) 300~480 with CaCO3

7 temporary hardness/(mg/L) 250~350 with CaCO3

Calcium hardness/(mg/L) 120~220 with CaCO3

Total alkalinity/(mg/L) 250~350 with CaCO3

Salt content/(mg/L) 1100~1300

Total iron/(mg/L) < 0.1

12 CI-/ (mg/L) < 260 is generally 120~140

13 so2-4 / (mg/L) 190~220

14 f-/ (mg/L) 3~5

15 temperature/(mg/L) < 35

The waste water treatment requirements are shown below:

Discharge and reuse of waste water

The numerical value of the numerical value of the indicator of the water quality indicator is noted

1 pH value 7.0 to 8.5, 6-8.5

2 SS/(mg/L) < 5 < 30

3 COD/(mg/L) < 30 < 50

4 BOD/(mg/L) < 10 < 25

Oil/mg/L < 2 < 4

Total hardness/(mg/L) 200~300 with CaCO3

7 temporary hardness/(mg/L) < 100 for CaCO3

Calcium hardness/(mg/L) < 30 for CaCO3

Total alkalinity/(mg/L) < 100 with CaCO3

Salt content/(mg/L) < 1100

Total iron/(mg/L) < 0.1

12 CI-/ mg/L < 130

13 so2-4 / mg/L < 200

14. F-/ mg/L) 3

15 temperature/(mg/L) < 35

This engineering water is typical of steel industry wastewater, organic pollutant content is not high, but biochemical difference is not suitable for biodegradation. This project mainly adopts physical chemistry method. As an industrial rehydration, the process of removing temporary hardness, softening of total alkalinity, filtration and disinfection is added in the treatment of water reuse.

The industrial effluent discharged from the factory is piped into the water inlet of the waste water treatment plant. After the pretreatment part, the large particles in the water will be removed by means of coarse and fine grille. By lift pump to the water distribution structures, again in the dosing coagulant and lime and sulfuric acid, and then assigned to high-density clarifier and wastewater to remove the suspended solids in the water and colloidal substances, ensure the clarity of water, drainage and fluoride in process at the same time. 70% of the total water treated with high-density clarifier, then through v-type filtration process and after adding the liquid chlorine disinfection, sent to the factory as make-up water of industrial water, 30% of the total water discharged after high-density clarifier processing to amount to mark.

Plane design

The project covers an area of 29500 ㎡, north and south to decorate. The original water from the waste water is entered into the treatment plant by the west side. After treatment, the north water pump room is sent to the plant to supplement the water.

Elevation design

The ground elevation is the relative elevation of the treatment system. The waste water is only improved by the pretreatment of the pretreatment, and then the treatment works by gravity flow.

According to the geotechnical engineering investigation report, important structures such as high density clarifying pool, v-shaped filter and pretreatment unit fall on the pebble layer, and the foundation soil is subjected to a standard value of 400kPa. General buildings such as complex buildings are on the clay soil layer, the foundation soil bearing stress standard is 150kPa.

The main structures are reinforced concrete structure, brick and concrete structure is adopted, and concrete structure is adopted in cable trench. Main construction, structure design of the table

Name of serial number or quantity/seat remark

Comprehensive office building is 646 ㎡ 1 reinforced concrete

2 adjustment pool 2000m cubed 1 reinforced concrete

3 868 ㎡ between dosing 1 reinforced concrete

4 water pump room 4000m cubed 1 brick

5 370 ㎡ 1 reinforced concrete sludge treatment system

6 high-density clarifier 1000 ㎡ 3 reinforced concrete

7 V filter 800 ㎡ 4 reinforced concrete

8 total substation 360 ㎡ 1 brick

This project includes six parts: pretreatment, high density clarifying pool, additive medicine room, v-shaped filter, backwater pump room and mud treatment. The control system consists of basic automation level and process automation level. Basic automation has QUANTUM series PLC and detection instrument composition. Data exchange is realized through FIPWAY network between PLC. The FIPWAY has an industrial PC on the Internet as an incoming interface to complete the monitoring of the entire system. Process automation level is composed of high-grade PENTIUM microcomputer and printer, complete the process of production management, data set, report printing, etc, the central control room large mimic panel also has showed that the water treatment process for the factory.

In May 2012, the system was operational and the system was stable. All indexes were designed.

The waste water treatment project in this factory has an investment of 8643 million yuan, 50 workers, 1800kW installed capacity, 22000kW? h, 0.12yuan/m cubed, and annual transportation fee of RMB 18 million. Tons of water treatment cost 0.80 yuan/m cubed.

Jining day general equipment co., LTD. Is a company engaged in water treatment equipment production, sales integration enterprise, after continuous efforts won the demand of the market both at home and abroad, won the customer consistent high praise.

Over the years, the company has always adhered to the concept of innovation, quality, service, dedication and gratitude. Adopt new ideas, strict quality, all-round service tracking, insist on making high-quality products.

My company main products: water treatment equipment, sewage treatment equipment, wastewater treatment, industrial wastewater, agricultural wastewater, rain water purification equipment, hospital sewage equipment, steel plant waste water equipment, slaughterhouse wastewater treatment equipment, food factory waste water treatment equipment and other equipment, can professional custom according to the water treatment equipment.