Instructional Manual For Clarification Of Startup In Source Categories Affected By New Source Performance Standards - U.s. Environmental Protection Agency - 1979 Page 141
ADVERTISEMENT
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
13 
14 
15 
16 
17 
18 
19 
20 
21 
22 
23 
24 
25 
26 
27 
28 
29 
30 
31 
32 
33 
34 
35 
36 
37 
38 
39 
40 
41 
42 
43 
44 
45 
46 
47 
48 
49 
50 
51 
52 
53 
54 
55 
56 
57 
58 
59 
60 
61 
62 
63 
64 
65 
66 
67 
68 
69 
70 
71 
72 
73 
74 
75 
76 
77 
78 
79 
80 
81 
82 
83 
84 
85 
86 
87 
88 
89 
90 
91 
92 
93 
94 
95 
96 
97 
98 
99 
100 
101 
102 
103 
104 
105 
106 
107 
108 
109 
110 
111 
112 
113 
114 
115 
116 
117 
118 
119 
120 
121 
122 
123 
124 
125 
126 
127 
128 
129 
130 
131 
132 
133 
134 
135 
136 
137 
138 
139 
140 
141 
142 
143 
144 
145 
146 I
Introduction
LIME MANUFACTURING PLANTS - SUBPART HH
§60.340 - 60.344
The facilities subject to Standards of Performance for Lime Manufacturing
Plants are:
rotary lime kilns and lime hydrators.
A rotary lime kiln is a
unit with an inclined rotating drum which is used to produce a lime product
from limestone by calcination.
A lime hydrator is a unit used to produce a
hydrated lime product.
The pollutant regulated is particulate matter.
Emis-
sion limits established for rotary ·kilns and hydrators are 0.15 kilogram
per megagram of limestone feed (0.30 lb/ton) and 0.075 kilogram per megagram
of ·lime feed (0.15 lb/ton) respectively.
In addition, an opacity limitation
of less than 10 percent has been established for rotary lime kiln emissions.
Continuous monitoring of rotary kiln opacity is requi·red, except when using
a wet scrubber emission control device.
Subpart HH does not apply to facili-
ties used in the manufacture of lime at kraft pulp mills.
Sources constructed,
reconstructed or modified after May 3, 1977, are subject to the regulation.
Process Description
The sequence of operations in the production of lime are:
1) quarrying
the limestone, 2) crushing and sizing, 3) conveying, 4) calcination by rotary
kiln,S) processing the quicklime (the product of the kiln) by hydration,
6) milling/sizing, and 7) packaging (bulk or bag).
As mentioned above, the
lime manufacturing standard covers only the calcination and hydration operations.
These two operations are depicted in Figure 27.
"Limestone" means calcitic and
dolomitic limestone, whereas "Lime Product" means the product of the calcination
process including but not limited to calcitic lime, dolomitic lime, and dead-
burned dolomite.
Calcination
A rotary kiln is basically a furnace consisting of a heavy steel shell
lined with refractory brick.
Kilns are normally fired with one or more of the
following fuels:
natural gas, fuel oil, or pulverized coal or coke.
The kilns
are normally installed at inclines of 3-5
0
on four to six foundation piers and
revolve on trunnions at 30-50 seconds per revolution.
Rotary
~ilns
will vary
in size ranging from 2 to 5 meters (6.5 to 16 feet) in diameter to 18. to 183
meters (59 to 600 feet) in length.
Sized limestone is fed into the elevated end of the kiln and travels
down the length of the kiln towards the firing end.
The material is heated to a
temperature of 1100
0
C (2000
0
F) which chemically breaks down the limestone (CaC03)
to produce quicklime (CaO) releasing
CO~.
Particulate laden gas flows counter-
129
ADVERTISEMENT
0 votes
Related Articles
Related forms
Epa 402-r-98-008 - Statistical Procedures For Certifying Phosphogypsum For Entry Into Commerce - U.s. Environmental Protection Agency - 1998
Legal
Small Systems Guide To Safe Drinking Water Act Regulations - U.s. Environmental Protection Agency - 2003
Legal
Form Rc-4100 - Reader Response Card - U.s. Environmental Protection Agency Water Resource Center
Legal
Request For Transfer Of A Computer Readable Form Under 37 Cfr 1.821(e) - U.s. Department Of Commerce
Legal
U.s. Government, Federal Agency Or Instrumentality Exemption Certificate Form - Kansas Department Of Revenue
Financial
Related Categories
Parent category: Legal