HX THRASH RACKS

Application:

HX thrash racks are designed to separate floating debris or adrift impurities from liquid. They serve mainly the municipal as well as industrial effluent water treatment plants, waterworks, or irrigation canals, or if you like anywhere where separation of floating debris or insoluble materials is required when contained in liquid that flows within the open sewer. It constitutes a stage called mechanical pretreatment of water.

b=1000mm, h=1000mm
b=1000mm
h=1000mm








Function Description:

Water led to the sewer full of suspended solids flows over the rack (bar screen) lamellas. These are made of steel bands (strips) with firmly set width of anchoring slot within the support frame. Insoluble or floating materials larger than the slot width get caught on the lamellas. Raking device starts automatically within the time intervals adjusted. This raking device comprises a raking bar and cleaning brushes used to rake the caught floating debris or insoluble materials from lamellas into the hydraulic press’hopper and operating chamber. Once inside operating chamber the hydraulic press will dewater the rackings, press them and convey them into the container via the conveyance piping. The adjustments of raking the solids and pressing the rackings as such are independent. The standard width of the slots between rack lamellas is normally 6 mm. The entire equipment is made of corrosion proof steel 17 241.

Specifications:

HX racks are electric motor driven via hydrostatic transmission.Electric motor power installed equals to 0,7 kW. Hydraulic set’s operating pressure is 16 MPa. There is fully automatic control with the possibility of independent setting up the time for raking and pressing the rackings. Normally the equipment will be installed inside concreted sewer of respective width. Conveying piping with pressed rackings is able to be led under the 45°or 90o angles. Maximal conveyance height for pressed rackings is 5 m.

Hydraulic Parameters:

TYPE
Sewer Size
Rack Performance Parameters
Width "W" (mm)
Height "H1" (mm)
Maximal Level (mm)
Maximal Flowrate Q (l/s)
Power Input Installed N (kW)
HX 400
400
400
200
40
0,75
400
800
400
80
0,75
400
1300
650
130
1,10
HX 500
500
500
250
62,5
0,75
500
900
500
125
1,10
500
1300
700
175
1,50
HX 600
600
600
300
90
0,75
600
900
500
150
1,10
600
1300
800
240
1,50

HX thrash racks scheme:


Download: AutoCAD_01

Legend:

  • 1 - Supporting frame
  • 2 - Operating chamber of the hydraulic press
  • 3 - Drive of HM1 hydraulic press operating piston
  • 4 - Drive of raking device to rake HM2 and HM3 suspended solids
  • 5 - Thrash rack lamellas
  • 6 - Raking bar
  • 7 - Cleaning brushes
  • 8 - Hydraulic unit
  • 9 - Electric switchboard
  • 10 - Conveyance piping for pressed rackings

Building and Anchoring Dimensions:

Type
Rack Dimensions
Sewer Dimensions
Width "W" (mm)
Length "L" (mm)
Height "H" (mm)
Height "H2" (mm)
Width "W" (mm)
Height "H1" (mm)
HX400
400
1010
2160
230
400
400
400
1255
2325
180
400
800
400
1442
2555
110
400
1300
HX 500
500
1010
2160
130
500
500
500
1255
2325
80
500
900
500
1442
2555
110
500
1300
HX 600
600
1010
2160
30
600
600
600
1255
2325
80
600
900
600
1442
2555
110
600
1300

All the racks will be anchored to the trough’s (channel’s) upper surface by means of metric anchores into the concrete. Anchoring dimensions - M10 two-sided at the distance of 50 mm from the outside edge of the supporting frame.
 

Conveyance piping for pressed rackings
Diameter of conveyance piping for pressed rackings
204, DN 200
Conveyance piping slope angle
45°, 90°
Conveyance piping‘s fitting flange dimensions
DN 200, PN 6
Maximal conveyance height of pressed rackings starting from H2 size
3500

Material Type

Rack’s mechanical raking parts are made of corrosion proof steel class 17241. Hydraulic unit is made of normal structural steel complete with surface finish using synthetic paint. Electric switchboard is of plastic version.

Ordering:

Your order should include the following:

  • Number of pieces
  • Sewer width
  • Sewer height
  • Required width of the gaps between lamellas – in case it differs from the standard one
  • Minimal and maximal levels upstream the racks
  • Delivery location and date
  • Contact person, phone, fax, or any other requirements

Specifications of the Supply:

Part of supply are the mechanically raked racks including hydraulic press designed for the rackings, electrical switchboard, control system and conveyance piping for the rackings terminated with flange DN 200, PN 6 of total length 500 mm from the side wall of racks’supporting frame. Basic transition is provided via the anchoring of mechanically raked racks by means of the frame to the supporting structure with the spacing of anchor bolts A x B. Please specify in more detail any other requirements as far as anchoring and sewer tie-in are concerned.

Terms:

Offer will be developed within 24 hours. Supply of the equipment takes about 10 weeks.


Guarantees and Services :

There is 24-month guarantee for equipment. We provide for after-guarantee services within two weeks after receipt of your request.

Advantages of the Equipment:

High life of the equipment. Easy to operate. Minimal operating requirements. High efficiency of mechanical pretreating (preliminary clarification) of liquids. Rack lamellas, after having finished raking the floating or insoluble materials, undergo additional cleaning with cleaning brushes. The front moving parts of the equipment are not under the liquid level. Separation of floating and insoluble materials along with their pressing are contained within one single unit. Hydrostatic transmission provides very effective protection to the drive motor against being damaged due to overloading.

Example of HX mechanical raking rack installation: