Clea­ning con­trol HE 5750

Auto­ma­tic moni­to­ring of valve and fil­ter func­tions

Espe­ci­ally large fil­ter plants with seve­ral hundred clea­ning val­ves and many thou­sands of fil­ter bags, such as those found in waste inci­ne­ra­tion plants and cement works, should have a high degree of auto­ma­ted moni­to­ring pro­ces­ses to ensure that the plant is always fully func­tional.

For this reason, HESCH has inte­gra­ted auto­ma­tic hose rup­ture moni­to­ring into the HE 5750 clea­ning con­trol sys­tem in addi­tion to exten­sive moni­to­ring of the clea­ning valve func­tion. For this pur­pose, only one cen­tral dust sen­sor is optio­nally requi­red, which moun­ted in the clean gas duct at the fil­ter out­let, moni­tors the dust load of all cham­bers.

 

Exam­ple cal­cu­la­tion:

When using a 500 kW fan, for exam­ple, ope­ra­tors of dust coll­ec­tion sys­tems can reduce elec­tri­city con­sump­tion by around 10 per­cent, saving around 22,000 euros in energy costs per year. (At a kilo­watt price of 5 cents.)

 

 

Pre-pres­sure con­trol: new fea­ture enables energy costs to be redu­ced

Saving energy is even more important today than ever before, due to recent high elec­tri­city price increa­ses. HESCH has deve­lo­ped an energy-saving func­tion for ope­ra­tors of large fil­ter sys­tems.

The new inlet pres­sure con­trol opti­mi­zes the clea­ning pres­sure. The inlet pres­sure con­trol ensu­res that only as much com­pres­sed air is deli­vered as is requi­red for clea­ning the fil­ter. The con­sump­tion of expen­sive com­pres­sed air is redu­ced. In addi­tion, the upstream pres­sure con­trol also has a posi­tive effect on the ser­vice life of the fil­ter media, since the fil­ter ele­ments are sub­jec­ted to com­pres­sed air more gently than before. This lower load increa­ses the ser­vice life of the fil­ter ele­ments.

 

 

Accu­rate hose rup­ture loca­liza­tion

If one of three freely defi­ned limit values of the dust load is excee­ded, the con­trol sys­tem auto­ma­ti­cally assigns this event to the respec­tive cham­ber and trig­gers the cor­re­spon­ding reac­tion (e.g. an error mes­sage, an alarm or the shut­down of the sys­tem).

 

In this way, not only is fault-free ope­ra­tion gua­ran­teed at all times, but in the event of a hose rup­ture, imme­dia­tely a mes­sage is also gene­ra­ted with the exact posi­tion of the dama­ged hose row.

 

This con­sider­a­bly mini­mi­zes the time requi­red to locate a defec­tive fil­ter bag and thus increa­ses the avai­la­bi­lity and effi­ci­ency of the sys­tem.

 

 

 

 

 

 

 

Struc­ture of the clea­ning sys­tem

The HE 5750 sys­tem con­trol­ler is the cen­tral unit in the CAN net­work of the clea­ning con­trol sys­tem for indus­trial bag fil­ters. The cen­tral con­trol unit com­mu­ni­ca­tes with the decen­tra­li­zed valve con­trol units HE 5724 as well as the dam­per con­trol units HE 5740 via the indus­trial CAN bus.

 

The HE 5750 cen­tral con­trol unit takes over the task of coor­di­na­ting and moni­to­ring all con­nec­ted assem­blies and com­mu­ni­ca­ting with the con­trol sys­tem.

 

The HE 5724 slave con­trol­lers con­trol the valve con­trol and moni­to­ring pro­cess. The dam­per con­trol units form the inter­face to the dam­per actua­tors.

 

The HE 5750 con­trols up to 32 slave boxes. The con­nec­tion bet­ween the func­tional units is made via CAN bus.

A con­nec­tion to a con­trol sys­tem via Pro­fi­bus-DP, Mod­bus or Ether­net is stan­dard.

 

Control functions	– Real valve function monitoring with only one pressure transmitter per pressure tank – Monitoring of the valve circuits (cable break, overcurrent) – Monitoring valve function for proper opening and closing – Bunker level monitoring – Fabric filter monitoring (hose rupture) in the chambers via dust sensor – Control of isolation valves in case of maintenance or malfunction – NEW: Pre-pressure control for optimization of the cleaning pressure
Diagnostic options	– Pressure drop at each valve – Dust increase with each valve – remote monitoring – Log files for analog channels
Applications	– Exhaust gas dust extraction in waste incineration plants and cement plants – Flue gas dust extraction in power plants

Technical data

Errors and omis­si­ons excepted

Downloads

Ope­ra­ting Ins­truc­tions HE 5750 – Ger­man

Ope­ra­ting Ins­truc­tions HE 5750 – Eng­lish