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Ammonia Plant Emissions Control

IP.com Disclosure Number: IPCOM000218638D
Publication Date: 2012-Jun-06

Publishing Venue

The IP.com Prior Art Database

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 12% of the total text.

Page 01 of 22

AMMONIA PLANT

EMISSIONS CONTROL

BY


D. J. BOZYK, R B. STRAIT, ANDN. HAMMOND

THEM. W. KELLOGG COMPANY

PREPARED FOR PRESENTATIONAT

THE KELLOGG AMMONIA CLUB MEETING

SAN DIEGO, CALIFORNIA 23 AUGUST 1990


Page 02 of 22

ABSTRACT

This paper addresses the sources of pollution and pollution control needs for a typical Kellogg ammonia plant. Air and water emissions are identified and control methods are reviewed.


Page 03 of 22

INTRODUCTION

The manufacture of ammonia from natural gas using steam reforming is a relatively clean and environmentallysafe process. Ammonia is a chemical that is manufactured in large quantities; and when compared to other chemical and petrochemical processes, the ammonia process is not found to be a serious polluter. In spite of this long record of clean operation, attention is being focussed on all chemical manufacturing processes, including ammonia.

The environmental needs of ammonia plants are changing. With more attention directed at cleaning up the environment,what used to be acceptable practice is no longer acceptable. Whether the driving force is a manufacturers'corporate policy to be a good neighbor or environmental regulations, the objective is the same clean-up the plant emissionsin order to clean up our environment. In the long term, the question of how much pollution can be tolerated may be one of survival. In the shorter term, the driving force for environmental clean up is economics. In the extreme case, governmental regulators may tell us to clean up or shut down. In the more typical case, we are forced to reach lower limits of emissions. How these lower limits are reached can significantlyinfluence profitability. So, it is important to consider the alternative methods of reducing emissionsand select the solution carefully.

Messrs. Gomaa and Cindric presented Ammonia and Urea Plants" at the AIChE general way, the emissionsfrom ammonia detail on controlling emissionsfrom a

The approach to minimizing pollution

1) Stop the pollutant from being generated.

2 ) If it is generated, stop it from being emitted.


3) If it is emitted, collect it and


A) Recycle


B) Treat


C) Concentrate

0 D) Bum

These solutions are generic and could be listed as solutionsto pollution from any source. The challenge is how the pollutant can be eliminated economically. For example, ammonia is a pollutant from an ammonia plant, but we would never consider stop generating it. On the other hand, NOx generated in the primary reformer is more economicallycontrolled at its source by not being generated than being collected and treated.

Table 1lists the sources of pollutants from a conventionalKellogg ammonia plant. Methods by which pollution might be reduced or eliminated will be considered for each source.

0

Control Measures of which addressed, in a paper will go into more

straight forward:


Page 04 of 22

TABLE1

SOURCES OF EMISSIONS FOR A TYPICAL KELLOGG AMMONIA PLANT

Emission Point
Pollutants

Frequency

DesulfurizationUnit

s,c o ,voc Interm...