Decanter Centrifuges Form

Technical Questionnaire - Decanter Centrifuges

Company Name
Company Address
Tel. No.
Fax. No.
E-mail Address
Plant Location

Characteristics of Feed Material

1.	What is the material to be processed :	Common Name
		Technical Name
		Trade Name
		Chemical Formula

2.	Physical properties of liquid phase	Indicate its Name
		Specific Gravity	@ °C
		Viscosity	@ °C

3.A	Physical properties of solid phase	Indicate its Name
		Specific gravity	@ °C

3.B	Indicate the particle size distribution of the solids	Size in microns	% cumulative undersize







		Mean Size	µ

4	For liquid/Solid seperation what is the concentration of solid suspended in the liquid? Indicate the particle size distribution of the solids		% W/W insolubles % W/V insolubles

5	Is the environment around the decanter centrifuge corrosive or severe?	Yes	No
	* If Yes give Details.

6	Is the slurry composed of inflamable material	Yes	No
	* If Yes state.	Vapour pressure at operating temperature	mm Hg bar psi
		Flash Point of the Liquid	°C
		Autoignition Temperature	°C

7	State the variation expected in the Feed Composition		% W/W max.insolubles
			% W/W min.insolubles

8	At what rate must the following Phases be handled?	a)Light rate	m³/hr
		b)Solids rate (Bone Dry)	Kg/hrtonne/hr

9	Type of duty	Continuous	intermittent

10	Slurry feed temperature	°C

11	Are the solids known to be Abrasive?	Yes	No

12	Are the solids shiny in nature ?	Yes	No

13	Are the solids to be washed ?	Yes	No

a)	If yes, state name of rinse liquid

b)	Please indicate the purity of cake solid required to be achieved after rinse		% purity of cake solid on dry basis
			% solubles acceptable in cake solids on dry basis
Machine Requirements

14	Indicate if known the materials of construction suitable for the centrifuge components in contact with the process	S.S.304	S.S.316 L S.S.304 L
		S.S.316	S.S.317 S.S.316 Ti
			Duplex Stainless steel
			Others(specify)
Electrics

15	Indicate the power	Volts	Hz Phase

16	Indicate Motor Enclosure	Drip Proof	Flame Proof Totally Enclosed

17	Indicate Motor Characteristics	Protection IP:	IP 54 IP 55

		Temperature Rating :	40ºC 50ºC OthersºC

		Insulation class :	Class B Class F Others

18	Inspection Authority	By Customer	Third Party inspection	Waived inspection

		State the agency's name

Product Requirements

19	State the maximum level of insoluble solids acceptable in the clarified Liquid discharge		% insoluble

20	State the maximum level of liquid acceptable in the cake solid		% Volatile

21	State the normal operating feed rate		m/hr

22	State the Maximum expected feed rate		m/hr

23 Please E-mail or facsimile us the flowsheet of the process indicating the separation steps.

For Effluent Treatment Applications/Waste Treatment

24	State the type of effluent	Municipal	Industrial Effluent

25	Indicate the Constituents of feed to treatment Plant

26	Indicate the nature of sludge that needs to be dewatered.(tick as necessary)	Primary	Secondary
		Co-settled	Mixed
		Other

27	Is the sludge digested?	Yes	No
	* if yes, click as appropriate	Anerobic	Aerobic
		Others(specify)

Detail the Characteristics of

28A	The influent to the treatment plant	BOD	mg/I COD mg/I

		Insolubles	mg/I

28B	The feed to the primary clarifier	Insolubles	mg/I

28C	The underflow of the primary clarifier	Insolubles	% W/W %W/V

28D	The feed to the Secondary clarifier	Insolubles	mg/I

28E	The feed to the Insolubles thickener	Insolubles	% W/W %W/V
28F	The underflow from thickner bottom	Insolubles	% W/W %W/V
28G	The underflow of the Secondary clarifier	Insolubles	% W/W %W/V

29	Has the sludge been chemically treated	Yes	No

30	If yes give brief details of chemical treatment	Chemical added
		Point of Addition
		Rate of Addition	kg/hr l/hr

31	Remarks and any additional information
32	Person completing Questionaire
33	Designation
34	Date