麥科星SCR脫硝催化劑檢測(cè)試驗(yàn)臺(tái)

SCR脫硝催化劑檢測(cè)試驗(yàn)臺(tái)，就是滿足對(duì)SCR脫硝催化劑的磨損強(qiáng)度檢測(cè)而設(shè)計(jì)開(kāi)發(fā)的裝置。該裝置主要目標(biāo)客戶為熱電廠，使客戶能方便準(zhǔn)確在檢測(cè)催化劑模塊的耐磨損性能，為煙氣脫硝中催化劑的設(shè)計(jì)、生產(chǎn)和使用提供準(zhǔn)確的實(shí)驗(yàn)數(shù)據(jù)。

本試驗(yàn)臺(tái)設(shè)計(jì)成臥式結(jié)構(gòu)，檢測(cè)裝置主體結(jié)構(gòu)為一根水平放置的風(fēng)管，風(fēng)管前端安裝有渦旋氣泵提供動(dòng)力，空氣自進(jìn)風(fēng)口由渦旋氣泵吹入管道。管道上設(shè)有兩個(gè)前后布置的長(zhǎng)方形樣品倉(cāng)，用于放置測(cè)試催化劑樣品。在兩個(gè)樣品倉(cāng)中間設(shè)有磨損劑（石英砂顆粒）加料口，磨損劑由進(jìn)料口以恒定速率注入水平放置的風(fēng)管，并由渦旋氣泵產(chǎn)生的氣流攜帶向下游輸送，帶有磨損劑的氣流通過(guò)下游測(cè)試樣品倉(cāng)中催化劑模塊中間的孔隙打磨催化劑模塊。磨損下的催化劑粉末被氣流帶走，因此測(cè)試樣品減少的質(zhì)量可以間接反映出其磨損性。管道末端連接有一套磨損劑分離系統(tǒng)，分離后的磨損劑落于底部料斗中，而氣流則經(jīng)排風(fēng)口排出。

水平設(shè)置的風(fēng)管上安裝有渦街流量計(jì)、壓力變送器、風(fēng)速儀等檢測(cè)儀器儀表，用于監(jiān)控及調(diào)整管道內(nèi)風(fēng)速的大小，使試驗(yàn)臺(tái)中管道內(nèi)的風(fēng)速保持一個(gè)合適的、穩(wěn)定的狀態(tài)。

磨損劑加料機(jī)構(gòu)由磨損劑儲(chǔ)存料斗、閥門(mén)、給料料斗、螺旋加料機(jī)等組成，螺旋加料機(jī)由變頻電機(jī)驅(qū)動(dòng)，可自由調(diào)整轉(zhuǎn)速，進(jìn)而自由控制磨速劑進(jìn)入管道的速度。

試驗(yàn)開(kāi)始前，往給料料斗中加入適量的經(jīng)篩分的磨損劑，對(duì)比樣品倉(cāng)和測(cè)試樣品倉(cāng)中各放入相同的催化劑樣品，開(kāi)啟風(fēng)機(jī)，觀察流量計(jì)、壓力變送器及風(fēng)速儀，調(diào)節(jié)風(fēng)機(jī)頻率及風(fēng)量調(diào)節(jié)機(jī)構(gòu)，使管道中風(fēng)量及風(fēng)速達(dá)到要求的穩(wěn)定的數(shù)值，將磨損劑加料螺旋調(diào)整到合適的速度并啟動(dòng)，使之往管道中均勻加入磨損劑，控制系統(tǒng)開(kāi)始計(jì)時(shí)，當(dāng)達(dá)到設(shè)定的時(shí)間后，控制系統(tǒng)自動(dòng)停止螺旋加料機(jī)的加料工作，風(fēng)機(jī)延時(shí)一定時(shí)間后停止。操作人員開(kāi)啟脈沖除塵裝置，將除塵器中粘附的磨損劑全部清理到磨損劑收集箱中，取出并稱量。從樣品倉(cāng)中取出對(duì)比樣品和測(cè)試樣品，并分別稱量。由磨損劑的重量就可以計(jì)算出通過(guò)測(cè)試樣品的氣體中磨損劑的濃度，通過(guò)測(cè)試樣品和對(duì)比樣品的重量差，就可以計(jì)算出催化劑樣塊的磨損程度，從而計(jì)算出催化劑的磨損強(qiáng)度。

催化劑磨損強(qiáng)度檢測(cè)試驗(yàn)臺(tái)由風(fēng)機(jī)(渦旋氣泵)、風(fēng)量調(diào)節(jié)裝置、對(duì)比樣品倉(cāng)、自動(dòng)給料機(jī)構(gòu)、測(cè)試樣品倉(cāng)、磨損劑收集裝置、過(guò)濾器等主要部分組成，本系統(tǒng)測(cè)試樣品采用串聯(lián)方式

The SCR denitration catalyst detection test bench is a device designed and developed to meet the wear strength detection of SCR denitration catalysts. The main target customers of this device are thermal power plants, enabling customers to conveniently and accurately detect the wear resistance performance of catalyst modules, and providing accurate experimental data for the design, production, and use of catalysts in flue gas denitrification.

This test bench is designed as a horizontal structure, and the main structure of the detection device is a horizontally placed air duct. A vortex air pump is installed at the front end of the air duct to provide power, and air is blown into the pipeline from the inlet by the vortex air pump. There are two rectangular sample compartments arranged in front and back on the pipeline for placing test catalyst samples. There is a feeding port for abrasive (quartz sand particles) between two sample chambers. The abrasive is injected into a horizontally placed air duct at a constant rate through the feeding port and carried downstream by the airflow generated by the vortex air pump. The airflow with abrasive passes through the pores in the middle of the catalyst module in the downstream test sample chamber to polish the catalyst module. The catalyst powder under wear is carried away by the airflow, so the reduced mass of the test sample can indirectly reflect its wear resistance. There is a set of abrasive separation system connected at the end of the pipeline, and the separated abrasive falls into the bottom hopper, while the airflow is discharged through the exhaust outlet.

The horizontally set air duct is equipped with vortex flowmeter, pressure transmitter, anemometer and other detection instruments to monitor and adjust the wind speed inside the pipeline, so as to maintain a suitable and stable state of wind speed inside the pipeline in the test bench.

The wear agent feeding mechanism consists of a wear agent storage hopper, valves, feeding hopper, spiral feeder, etc. The spiral feeder is driven by a variable frequency motor and can freely adjust the speed, thereby freely controlling the speed of the wear agent entering the pipeline.

Before the experiment begins, add an appropriate amount of screened abrasive to the feeding hopper, compare the same catalyst samples in the sample chamber and the test sample chamber, turn on the fan, observe the flow meter, pressure transmitter, and anemometer, adjust the fan frequency and air volume adjustment mechanism to achieve the required stable values of air volume and air speed in the pipeline, adjust the abrasive feeding screw to the appropriate speed and start it, so that the abrasive is evenly added to the pipeline. The control system starts timing. When the set time is reached, the control system automatically stops the feeding work of the screw feeder, and the fan stops after a certain delay. The operator turns on the pulse dust removal device, cleans all the abrasive adhered in the dust collector into the abrasive collection box, takes it out and weighs it. Take out the comparison sample and the test sample from the sample warehouse, and weigh them separately. The concentration of the abrasive in the gas passing through the test sample can be calculated based on the weight of the abrasive. By comparing the weight difference between the test sample and the control sample, the degree of wear of the catalyst block can be calculated, thereby determining the wear strength of the catalyst.

The catalyst wear strength detection test bench consists of a fan (vortex air pump), an air volume adjustment device, a comparison sample chamber, an automatic feeding mechanism, a test sample chamber, a wear agent collection device, a filter, and other main parts. The test samples of this system are connected in series.