CN204380515U - Portable SCR honeycomb denitrating catalyst deashing device - Google Patents

Abstract

The utility model is the device that a kind of packaged type clears up SCR honeycomb type denitrification catalyst blocking coal ash specially, by truck, this equipment can directly be transported to coal fired thermal power plant on-site, utilize and be arranged on the deduster in container body, custom-designed dirt pocket, special through hole equipment and instrument, clear up the blocking of SCR denitration in time quickly, make the economical operation of unit energy safety and stability, run for Power Plant stability and safety and create condition and benefit.

Description

Portable SCR honeycomb denitrating catalyst deashing device

Technical field

The utility model relates in a kind of gas denitrifying technology, and selective catalytic reduction (SCR) cellular catalyst produces processing method and the device of coal ash blocking running a period of time.

Background technology

Along with China progressively strengthens the measure of environmental protection; the enforcement of new " thermal power plant's air pollution emission standard "; require that the discharged nitrous oxides of coal-burning boiler is reduced to 100 milligrams/less than every cubic metre; the discharge standard that some provinces propose coal-burning power plant will reach the discharge standard of Natural Gas Power Plant; namely the discharge capacity of nitrogen oxide is less than 50 milligrams/every cubic metre; so while all boiler erection denitrification apparatus, the maintenance of its operating cost and usefulness is also the practical problem that each power plant faces.Current fire coal boiler fume denitration the most effective the most ripe way is SCR method, and SCR catalyst has three kinds of versions, honeycomb fashion, flat and ripple plate, wherein cellular catalyst due to its frame for movement strong, the strong and most widely used model of economy, accounts for the market share more than 85%.After catalyst runs a period of time, by the impact of the reason such as obstruction of coal ash in the pollution of flue gas neutral and alkali metal and flue gas, make its degradation failure, make fume emission cannot reach the environment protection emission requirement of country; The obstruction of catalyst makes flue resistance increase simultaneously, air-introduced machine is exerted oneself increase, during severe obstruction, make unit cannot oepration at full load, or boiler is in operation under positive pressure, unit also cannot peak regulation, and the economic security seriously having had influence on unit is run, and now must process the denitrating catalyst blocked.

Utility model content

Run a period of time according to denitrating catalyst and will produce blocking, and the more susceptible to plugging situation of SCR cellular catalyst, invent portable denitrating catalyst dust arrester, it can remove denitrating catalyst hole inside ash in scene rapidly, only just can solve the uneconomical safe operation factor of unit caused because hindering ash with time light maintenance phase; It is also an important step in SCR denitration regeneration technology simultaneously, ensures through-hole rate higher in SCR denitrating catalyst regeneration technology, can avoid damaging catalyst element because hole inside ash expands in activation process.

This device is made up of container, the cleaner be arranged in container, module process chamber and specific purpose tool.

Container.Container is the loading appliance of device, is also a part of constituent apparatus.Container is special tailor-made, and generally long by 6.0 × wide by 2.6 × high 3.0 meters, enabling is equipped with at container two ends, and one end door is used to form dirt pocket and module process chamber, and other end door is used to convenient maintenance; The side of casing also has gate, is convenient to safeguard and checkout facility, and cleaning deduster dust stratification; Container top has access hole, is convenient to maintenance maintenance deduster motor.Seal partition completely by steel plate in casing, one end is as dirt pocket and module process chamber, and cleaner is placed in one end.

Cleaner.Cleaner is a small-sized pulse bag formula filter, and its process air quantity is at 12000 ~ 24000 cubes ms/h, and blast is greater than 2500Pa; Filter area is at 90 ~ 200m2, and adopt pulsed online ash removal, deashing pressure is at 0.4 ~ 0.7MPa; Efficiency is 99.99%.Adopt drawer type dust collecting bin, to reduce cleaner volume, cleaner special configuration compressed air storage tank, is convenient to the normal work that can not have influence on deduster when cleaning denitrification catalyst module.

Dirt pocket and module process chamber.According to the size characteristics of general SCR honeycomb type denitrification catalyst module, devise dirt pocket.A dirt pocket welding box body support, on support parallel has welded three channel-section steels, and put module for fork truck, channel-section steel has certain altitude, is convenient to clear up module; Have row's circular hole above each channel-section steel, be used for the universal bearing of mounting strap sealing, to facilitate adjustment module placement location; The channel-section steel end has the cleaner filter air inlet of 1950 × 950 millimeters, and the low edge of opening is on channel-section steel top, and opening surrounding installs sealing joint strip; Air inlet close up along on LED strip shape lamp has been installed, be convenient to through hole inspection; Channel-section steel there is the frame of a fixing module hook, to prevent module in deashing process, due to the vibrations of cleaner filter compressor, cause the movement of module position; LED spotlight is equipped with on casing top, is convenient to the cloudy day or works at night; Locular wall both sides are provided with compressed air hose and valve, and quick coupling is equipped with in valve one end, are convenient to conveniently connect cleaning equipment.

Specific purpose tool.In order to fast and safely clean SCR cellular catalyst module, specialized designs and be configured with specific purpose tool.

1 purges rifle.A conventional purging rifle, is connected on compressed air piping with flexible pipe and snap joint, start artificially purge gunlock close just can carry out purging close down operation; Blowing pressure is between 0.4 ~ 0.7MPa;

2 electric portable drills.A kind of light-duty low speed electric drill, is furnished with lithium battery, can facilitates onsite application; To harden serious part for coal ash on element, need to come clear hole with electric drill, the rotating speed of electric drill and moment can manual operation adjustment, in case the excessive damage catalyst element of the spline too fast moment of speed;

3 through hole shields.For the ease of through hole operation, specialized designs through hole shield.Half light flexible comparatively thin material selected by shield, easily adsorbed and not easily breaks, and size is 1000 × 170 millimeters, generally at least joins 11; Cover unprocessed portion element with through hole shield, blast and the flow for the treatment of element part can be increased, reach the treatment effect increasing through hole;

4 through hole devices.Through hole device is one is the electronic through hole device of cleaning SCR honeycomb type denitrification catalyst specialized designs.Device is made up of three parts: rigidity is around spring, moment speed setting device and automatically pass in and out Vidacare corp.Rigidity is the Spring capable of diameter varying made with rigid material around spring, and taper bit design is imitated on top, and specification is Φ 5 × 2000 millimeters; Be applicable to present all SCR denitration apertures; Moment speed setting device is used to set rigidity around the pace of spring and rotating torque, the intensity of vanadium titanium base SCR catalyst element is limited, the element internal orifice dimension of each producer and wall thickness are different, the difference of intensity is also very large, if design and misoperation can cause the mechanical failure of element, therefore according to the situation often criticizing element, rotating speed and torque setting must be carried out, to prevent the damage causing element because moment is excessive; Turnover drive unit is exactly the setting value according to speed torque, operates around the turnover of spring with certain speed and Torque Control rigidity.

Operation sequence.Tippler is utilized to be overturn by catalyst module, transport to fork truck again on the channel-section steel of portable SCR denitration deashing device module office treatment, the bottom of module towards deduster import, artificial adjusting module, by the bottom surrounding steel plate of module and sealing strip close contact, then hook with frame and be fixed, at this moment open deduster, then purge module with purging rifle, check plug-hole situation, progressively process by region, first from four element cleanings up and down of side, remainder through hole shield blocks; Part coal ash is hardened serious element, part hard over first boring with electric portable drill, then carry out through hole with through hole device, whether cleaning is thorough, utilizes the LED light device be arranged on deduster air inlet just very clear.This row cleans out, and blocks, then clear up next row element with through hole shield.

Device cleaning SCR honeycomb type denitrification catalyst element, its through-hole rate can reach more than 98%, and only cannot obtain outside cleaning because subelement hinders because frame for movement is stifled, all the other elements all can ensure unimpeded, owing to employing specific purpose tool, reduce and stopped to damage when clearing up the possibility of element.This covering device can clear up the blockage problem of SCR nearby rapidly; decrease the damage of catalyst module transportation and saved haulage time; also can decrease because catalyst module blocks the Power Plant downtime caused; solve economy of power plant safe operation problem in time, for power plant brings huge economic benefit.

Accompanying drawing illustrates:

Fig. 1 is the device sketch of portable special cleaning SCR honeycomb type denitrification catalyst blocking coal ash.

Fig. 2 is the device top view of portable special cleaning SCR honeycomb type denitrification catalyst blocking coal ash.

Detailed description of the invention:

Detailed description of the invention please refer to Fig. 1 and Fig. 2.Device also comprises: overhaul of the equipments mouth (8), motor (9), air outlet (10), cleaner holding chamber (16).Be described as follows in conjunction with working method: after long by 1910 × wide by a 970 × SCR honeycomb type denitrification catalyst module of high 1166 millimeters is hung out from boiler flue, be transported to by portable SCR honeycomb type denitrification catalyst deashing device by fork truck, be placed on tipper, after module being overturn 90 °, by fork truck module bottom is placed on inwards on the channel-section steel (20) in SCR honeycomb type denitrification catalyst deashing device dirt pocket and module process chamber (15), withdraw from fork truck, by artificial by the universal bearing (7) be arranged on channel-section steel (6), adjusting module, make sealing joint strip (11) close contact on the surrounding of module bottom steel plate and air inlet, the frame that recycling is arranged on channel-section steel (20) hooks (14), by module fixation, then container side door (1) is opened, open cleaner and LED (5), start air compressor machine (3) by linkage relationship simultaneously, also the compressed air of 0.7MPa is progressively established in compressed air cylinder (4), due to the effect of the suction of deduster, module will be sucked away with the floating ash of inside, now by the light of LED (5), check the stopping state of each bee-hole of module, the snap joint (18) purging flexible pipe one end of rifle (17) is connected on compressed air line, open the valve (19) on compressed air piping, through hole shield is progressively placed on the Top section of catalyst from left to right, only leave row's element of low order end, first purge one by one by each air holes purged on rifle (17) aligning catalyst element, still the bee-hole blocked, first bore with electric portable drill and open top tough parts, then moment and the rotating speed of through hole device is set, through hole is carried out with through hole device, can operate through hole device during through hole makes rigidity can advance around spring, retreat periodic running, and progressively adjust moment and rotating speed according to stopping state, make it to reach the object thoroughly removing bee-hole blocking, after such through hole device has been cleared up, the bee-hole just having used through hole device passing hole for one time is purged again with purging rifle (17), by LED (5) check this arrange all bee-holes all unimpeded after, this row cleans out, mobile near rightmost one block of through hole shield, cover complete cleaned rightmost row's element just now, start to clear up the right second row catalyst element bee-hole with identical order and mode, the all catalyst element bee-holes of 12 row are progressively cleared up by that analogy, take off all through hole shields, close down dust arrester, extract the dust collecting box (2) of deduster bottom out, remove collection ash in it and load in bag, open fixed mount again and hook (14), fork truck is utilized to be shifted out in dirt pocket (15) by catalyst module, be placed on tipper and overturn 90 °, be placed on appointed place, this catalyst module has been cleared up, carry out next catalyst module cleaning again, sequential grammar is same as described above.Cloudy day or when working at night, can work on by the light of illuminating lamp (12) and shot-light (13).

Claims (3)

1. a portable SCR honeycomb denitrating catalyst deashing device, it is characterized in that: this device by container, be arranged on cleaner in container and specific purpose tool forms, wherein, long 6.0 meters, wide 2.6 meters, high 3.0 meters of container, box house seals partition completely by steel plate, enabling is all equipped with in the two ends of casing, open the door in one end and steel plate forms module process chamber, the other end opens the door and steel plate forms cleaner holding chamber, the side of casing also has gate, is convenient to safeguard and checkout facility and the dust stratification cleared up in dust removal filter flue-dust retainer; Casing top has access hole, easy access cleaner motor, and described cleaner is a small-sized pulse bag formula filter, adopts pulsed online ash removal, drawer type dust collecting bin, and special configuration compressed air storage tank.

2. portable SCR honeycomb denitrating catalyst deashing device according to claim 1, is characterized in that: a welding support in module process chamber, parallelly on support has welded three channel-section steels, puts module for fork truck; Have row's circular hole above each channel-section steel, be used for mounting strap sealing universal bearing; The channel-section steel end has cleaner filter air inlet, and opening surrounding installs sealing joint strip; Air inlet closes up along upper mounted LED lamp.

3. portable SCR honeycomb denitrating catalyst deashing device according to claim 2, is characterized in that: described specific purpose tool is for purging rifle, electric portable drill, through hole shield, through hole device.