市政污水處理工程案例(缺氧+傳統(tǒng)活性污泥法)

某污水處理廠是大連市修建的一座大型污水處理廠。該廠的建設(shè)引進(jìn)關(guān)鍵技術(shù)、監(jiān)控裝置和設(shè)備，提高污水處理效率，充分利用生物能，節(jié)約能耗，節(jié)省用地，降低工程造價(jià)和運(yùn)行成本。

該污水處理廠的工藝設(shè)計(jì)，在進(jìn)行各種工藝方案比較的基礎(chǔ)上，仍選用鼓風(fēng)曝氣的設(shè)計(jì)方案。其理由是大型污水處理廠采用鼓風(fēng)曝氣工藝管理簡(jiǎn)便、運(yùn)行可靠。該污水處理廠肖化吸收了國(guó)外的先進(jìn)技術(shù)，對(duì)每個(gè)單項(xiàng)構(gòu)筑物及污水、污泥處理的細(xì)部方案都作了改進(jìn)，如進(jìn)水泵房及污水量計(jì)量的自動(dòng)控制、洗砂排砂、排泥濃度控制、溶解氧白控、脫氨反硝化工藝、二沉池出水槽新工藝、消化池投泥方式、大型消化池的沼氣攪拌、沼氣發(fā)電升壓聯(lián)網(wǎng)、沼氣鍋爐及排泥閥、可調(diào)堰、細(xì)格柵等先進(jìn)技術(shù)都在該廠得到了應(yīng)用。

該廠污水處理系統(tǒng)分4個(gè)系列，4個(gè)圓形初沉池排成一行，4個(gè)曝氣池組成田字形，8座二沉池設(shè)在廠區(qū)南側(cè)，臨近北塘排水河，使處理出水可就近排人河道。污泥處理區(qū)設(shè)在廠的西北角，5個(gè)消化池組成梅花形，污泥處理的控制室設(shè)在5個(gè)捎化池的中央。北側(cè)設(shè)有兩個(gè)沼氣儲(chǔ)罐、污泥脫水機(jī)房和沼氣發(fā)電機(jī)房等。

處理構(gòu)筑物及設(shè)備

    格柵是污水處理廠的第一道預(yù)處理設(shè)施。該廠設(shè)6臺(tái)垂直格柵，由計(jì)算機(jī)程序控制。高水位時(shí)格柵清污機(jī)將連續(xù)工作，運(yùn)送格柵攔截的浮渣的皮帶運(yùn)輸機(jī)與格柵清污機(jī)聯(lián)鎖運(yùn)行，在所有格柵停止工作后，皮帶運(yùn)輸機(jī)仍將繼續(xù)運(yùn)行一段時(shí)間。

    泵房設(shè)有6個(gè)控制水位，控制5臺(tái)泵的運(yùn)行。為避免個(gè)別水泵負(fù)荷偏重而反復(fù)起動(dòng)，水泵將依次循環(huán)投人運(yùn)行。當(dāng)某臺(tái)泵因故障停止工作時(shí)，另一臺(tái)泵將自動(dòng)投入運(yùn)行。

  曲面格柵設(shè)在沉砂池的端部。每臺(tái)格柵的清污動(dòng)作根據(jù)水位模擬信號(hào)由計(jì)算機(jī)控制。當(dāng)水位差處于正常值時(shí)，清污工作將按設(shè)定時(shí)間動(dòng)作；當(dāng)前后水位差超過(guò)設(shè)定值時(shí)，清污工作將連續(xù)進(jìn)行。如果清污工作連續(xù)操作時(shí)間過(guò)長(zhǎng)，計(jì)算機(jī)將發(fā)出報(bào)警信號(hào)。

    曲面格柵刮出的浮渣落在皮帶運(yùn)輸機(jī)上，皮帶運(yùn)輸機(jī)的運(yùn)行與格柵清污機(jī)聯(lián)鎖，清污工作停止后，運(yùn)輸機(jī)仍將運(yùn)行一段時(shí)間。   

    沉砂池

    曝氣沉砂池設(shè)有6條廊道，每條長(zhǎng)30m、寬4m、深4.3m，水力停留時(shí)間約6min。

    池內(nèi)設(shè)有振動(dòng)空氣(VIBRAIR)曝氣器。全池設(shè)兩座吸砂工作橋，負(fù)責(zé)3條廊道的吸砂。污穢的砂水被提升到洗砂槽，經(jīng)攪拌后，有機(jī)物隨洗砂水流回進(jìn)水泵房，砂水被送至分砂機(jī)進(jìn)行進(jìn)一步脫水。分砂機(jī)設(shè)在進(jìn)水泵房的上部建筑頂層，以便脫水的砂粒流入砂斗運(yùn)走。

    吸砂工作橋用行程開(kāi)關(guān)控制，其上設(shè)有刮渣設(shè)施，以清除池內(nèi)浮渣。空氣提砂裝置要求注續(xù)工作，由計(jì)算機(jī)控制。當(dāng)空氣壓縮機(jī)發(fā)生故障時(shí)，備用機(jī)可自動(dòng)投入。空氣壓縮機(jī)、分砂機(jī)和泵的運(yùn)行狀態(tài)由計(jì)算機(jī)監(jiān)控，如出現(xiàn)故障將自動(dòng)報(bào)警。

設(shè)有周邊驅(qū)動(dòng)全橋式刮混機(jī)的輻流式沉淀池  初沉池運(yùn)行的關(guān)鍵是排泥，4座池輪流排泥的程序由計(jì)算機(jī)控制。每個(gè)排泥閥靠頻率/時(shí)間自動(dòng)操作。其功率/時(shí)間將根據(jù)計(jì)算機(jī)監(jiān)測(cè)到的污泥濃度和流量束進(jìn)行調(diào)整。排泥閥分兩部分，啟用的是電動(dòng)閥門，排泥口用的是可手動(dòng)調(diào)節(jié)的升降閥，該閥屬非標(biāo)設(shè)備。

    為防止排泥系統(tǒng)出現(xiàn)堵塞故障，在兩座初沉池間設(shè)一座污泥泵房。安裝GF單螺桿泵4臺(tái)，兩座泵房共裝8臺(tái)污泥泵。污泥泵按頻率鄺j問(wèn)自動(dòng)操作，并由計(jì)算機(jī)進(jìn)行調(diào)整，兩座污泥泵房交替運(yùn)行，在泵房的出口處設(shè)有污泥濃度模擬測(cè)量裝置，污泥進(jìn)人濃縮池前進(jìn)行

流量檢測(cè)。這些信號(hào)進(jìn)入計(jì)算機(jī)后，將用于計(jì)算污泥的排放量，以調(diào)整排泥技術(shù)上頻率和排混的持續(xù)時(shí)間。

濟(jì)寧天通是一家水處理設(shè)備生產(chǎn)和銷售集一體的公司，公司擁有高尖端的技術(shù)人才，擁有高素質(zhì)的工作團(tuán)隊(duì)，可以及時(shí)地為客戶提供完善的售后服務(wù)。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(chǎng)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。

Municipal sewage treatment works (hypoxia + traditional activated sludge method)

A sewage treatment plant is a large sewage treatment plant built in dalian. The construction of the plant introduces key technologies, monitoring devices and equipment to improve the efficiency of sewage treatment, make full use of the energy of biomass, save energy, save land, reduce project cost and operation cost.

The process design of the wastewater treatment plant is based on the comparison of various process schemes, and the design scheme of air blast aeration is still selected. The reason is that the large sewage treatment plant is simple and reliable. The sewage treatment plant XiaoHua absorbed foreign advanced technology, for each single structure and detailed scheme of sewage and sludge treatment were improved, such as feed water pump house and the automatic control of sewage quantity measurement, washing sand sand, mud concentration control, white accused of dissolved oxygen, ammonia denitrification technology, new technology of the second pond, the water tank, the digester throw mud way, large biogas digester of stirring, biogas power generation booster networking, biogas boiler and mud valve, adjustable weir, fine grille and other advanced technology have been applied in the factory.

Four series are the factory sewage treatment system, four round pond, line, at the beginning of four aeration ChiZu narita glyph, eight the second pond is located in the south area of the plant near the north river, pond drainage treatment, water can row to the nearest river. The sludge treatment area is located in the northwest corner of the factory, and the five digesters form the plum blossom shape, and the control room of sludge treatment is in the center of 5. There are two biogas storage tanks, sludge dewatering machine room and biogas generator room.

Deal with structures and equipment

Grille is the first pre-treatment facility for sewage treatment plants. The factory has 6 vertical grille, controlled by computer program. High water level grille decontamination machine will work continuously, carrying grille intercept the scum of the belt conveyor with interlocking operation grille decontamination machine, after all the grille to stop working, belt conveyor will continue to run for a period of time.

The pump room has 6 control water level, control the operation of 5 pumps. In order to avoid the repeated starting of individual pump load, the water pump will be circulated in turn. When a pump fails to work, another pump will be automatically put into operation.

The curved grille is located at the end of the sink. The cleaning action of each grille is controlled by computer according to the water level simulation signal. When the water level is at the normal value, the cleaning work will be determined by the setting time; When the current water level difference exceeds the set value, the cleaning work will be carried out continuously. If the clean-up operation is too long, the computer will send an alarm signal.

The scum of the curved grille falls onto the belt conveyor, the belt conveyor runs with the grille cleaning machine interlock, the transport plane will still run for some time after the decontamination work stops.

Grit chamber

There are 6 corridors in the aeration and settling pit, with each length 30m, 4m wide and 4.3m deep, and the water retention time is about 6min.

The tank has a vibrating air aerator. There are two sand suction work Bridges in the whole pool, which is responsible for the sand absorption of three corridors. The polluted sand water is hoisted to the washing trough. After stirring, the organic matter comes back into the inlet pump room with the washing water, and the sand water is sent to the sander for further dehydration. The sand control machine is located at the top of the upper building of the inlet pump room so that the sand can be transported by the sand.

The sand suction work bridge is controlled by the travel switch, which has the slag removal facilities to remove the dregs in the tank. The air lifting device requires the injection of continuous work, controlled by computer. When the air compressor fails, the standby machine can automatically input. The operation state of air compressor, sand separating machine and pump is monitored by computer.

The key to the operation of the radial sedimentation tank of the surrounding drive full bridge type scraping mixer is the sludge discharge, and the computer control is the procedure for the four pools rotating the mud. Each dredge valve operates automatically by frequency/time. The power/time will be adjusted according to the concentration of sludge and the flux of the monitor. The dredge valve is divided into two parts, and the electric valve is enabled. The discharge valve is a manual adjustable lift valve, which is a non-standard equipment.

A sludge pump room was established between two initial sinks to prevent the sludge system from being blocked. Installation GF single screw pump 4, two pump room with 8 sludge pump. Sludge pump according to the frequency of kuang j q automatic operation, and adjusted by a computer, two sludge pump room, alternately in the pump room is equipped with the sludge concentration at the exit to simulate measurement device, sludge thickener in before

Flow detection. These signals will then be used to calculate the amount of sludge emitted by the computer to adjust the duration of the frequency and mixing of the sludge.

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