Proposal for Relocation of Kiln Inlet Gas Sampling Point and Probe

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BESTWAY CEMENT LIMITED CHAKWAL

Proposal For Relocation of Kiln Inlet Gas

sampling Point and Analyzer Probe

Production/Optimization Team

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Summary

 Kiln inlet is the best spot for gas analysis for better process monitoring. An accurate

monitoring of process gasses at kiln inlet is of prime importance for optimized operation.

 For better analysis of gas the probe of gas analyzer should be installed at correct location,

close to kiln seal on the side where the kiln wall is turning downwards (0-400mm in front

of the seal and up to 200 mm beyond the seal).

 Chakwal Inlet analyzer position is not as per standard. The probe is located inside kiln

inlet chamber wall towards the side of kiln moving downwards.

 Probe blockage is also a chronic issue being faced. This issue is because of installation of

probe inside kiln inlet Chamber. Dust content inside kiln inlet chamber is on higher side.

 This was highlighted by Mr. Anis Haider (ITECA expert) and Mr. Sajjad Ullah (Team

Leader Optimization Pakcem).

 World wide references are available for installation of Gas analyzer probe inside beyond

Kiln Inlet seal. (FLS +ITECA)

 Comparison between technically sister plants KOHAT Cement and GHARIBWAL

cement have installation of gas analyzer probe inside kiln inlet.

 At BCL Chakwal since feed enters from both side (A & B) feed pipes into Kiln inlet. Due

to this design the probe location as per standard becomes critical.

 Relocation of Probe sampling point at Kiln inlet is possible. This provides an opportunity

for plant optimization listed as under

1. Accurate analysis at kiln inlet.

2. Reducing the false air effect from Kiln inlet Seal. 3. Optimizing fuel consumption.

4. Optimizing power consumption 5. Reduce probe blockage.

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1-Gas analysis at Kiln Inlet for Process Optimization

Kiln inlet is the best spot for gas analysis for better process monitoring. An accurate monitoring of process gasses at kiln inlet will have following Key benefits

 Optimized fuel consumption  Optimize quality

 Stable and safe kiln operation  Kiln stop prevention

 Emission reduction

2- Selection of sample point for Gas Analyzer Probe

The sampling point for gas has to be taken in respect to following points  Representative air

 No influence of false air

 Mechanical impact of material fall through  Risk of material build up

 Dust impact

 Condensation from volatiles

(FLSmidth, 2014) (Drawing Office Manual, 2008)

3- Location of Gas Analyzer Probe at Kiln Inlet

3.1- Standard location of Gas sampling probe at Kiln Inlet

The probe of gas analyzer should be installed at correct location, close to kiln seal on the side where the kiln wall is turning downwards (0-400mm in front of the seal and up to 200 mm beyond the seal). The probe head should be 200~400mm away from brick layer of rotary kiln. Sketch shows standard location of gas Analyzer

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3.2- Sampling Point Probe installation (By ITECA)

The probe is installed so that its tip is beyond kiln inlet seal to avoid influence of inlet seal false air. (Anis Haider ITECA)

Figure 2 Sample point Probe Installation

3.3- Design for Optimum probe location (Anis Haider ITECA)

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4- Location of Gas sampling probe at Kiln Inlet of BCL Chakwal

Chakwal Inlet analyzer position is not as per standard. The probe is located inside kiln inlet

chamber wall towards the side of kiln moving downwards. (Pictures attached of position of gas

sampling probe at Kiln line # 2)

Ideally analyzer should take sample from inside the kiln to avoid false air impact of Kiln Inlet

seal. Moreover probe blockage is also a chronic issue being faced at due to high dust load inside

kiln inlet.

This was highlighted by Mr. Anis Haider (ITECA expert) and Mr. Sajjad Ullah (Team Leader

Optimization Pakcem).

5- New Proposed Installed position of Inlet Gas Analyzer

Figure 5 Proposed new location for Gas sampling

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6- Comparison with Technical Sister Plants

At BCL Farooqia and Pakcem the angle of installed Gas analyzer probe is similar. At both plants

feed is entering at kiln inlet from one side.

At BCL Chakwal since feed enters from both side (A & B) feed pipes into Kiln inlet. Due to this

design the probe location as per standard becomes critical. To understand the possibilities

comparison is drawn from position of inlet Gas analyzer at technically sister plants.

6.1 Inlet Gas Analyzer Probe location at Kohat Cement (Technically sister Plant)

Figure 6 Comparison between KOHAT cement and BCL Chakwal

Kohat Cement is technically sister plant with same design of Kiln inlet and feed pipes. Figure

compares the analyzer position and design of KOHAT Cement and BCL Chakwal.

Inlet Gas Analyzer Probe at KOHAT CEMENT Inlet design at BCL Chakwal (Similar to KOHAT Cement)

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6.2- Gharibwal Cement (Position of Kiln inlet

Analyzer Probe)

Figure shows installation of probe at Gharibwal cement.

7- Recommendation:

Relocation of Probe sampling point at Kiln inlet is possible. This provides an opportunity for plant optimization. Relocation of gas analyzer will have following key benefits.

1. Accurate analysis at kiln inlet.

2. Reducing the false air effect from Kiln inlet Seal. 3. Optimizing fuel consumption.

4. Optimizing power consumption

5. Reduce probe blockage. (As at present probe blockage is due to its installation at high dust zone) 6. More available of Inlet gas Analyzer.

Figure 8 New Location and proposed shifting of Probe

References

Anis Haider ITECA. (n.d.). Presentation on Inlet Gas Analyzer. FLSmidth. (2014). Kiln Inlet Analyzer Presentation .

Office, G. A. (2008). Kohat and Gharibwal Cement

Plate form has to be shifted down for relocation of Inlet analyzer Probe

Proposed New Location

Figure 7 Kiln Inlet sampling point and probe location

Proposal for Relocation of Kiln Inlet Gas Sampling Point and Probe

BESTWAY CEMENT LIMITED CHAKWAL