20:
76:
51:
expelled air. Hoppers for dust collection are often installed in groups to allow for a greater collection quantity. Hoppers are used in many industries to hold material until it is needed, such as flour, sugar or nuts for food manufacturing, food pellets for livestock, crushed ores for refining, etc. Dust hoppers are employed in industrial processes that use air pollution control devices such as
90:
to release caked-on dust from the bag. Precipitators use a rapping system to release the dirt. The crumbling dust falls into the hopper. Once the material in the hopper reaches capacity, it is released through an opening in the bottom with a diameter of about 8–12 inches (20–30 cm). Hoppers are
50:
of any sort (e.g. dust, gravel, nuts, or seeds) and dispense these from the bottom when needed. In some specialized applications even small metal or plastic assembly components can be loaded and dispensed by small hopper systems. In the case of dust collection hoppers the dust can be collected from
103:
The greatest difficulty associated with the removal of very fine material, like flour or dust, from a hopper is the compaction of the material. Moisture content, particle shape and size, and vibration are all factors that contribute to compaction. Typically, with such fine materials, vibrators are
99:
Hopper walls are often insulated to protect the outside environment and personnel from the contents. Often, the bottom 1/4 – 1/3 of the container is heated to eliminate the possibility of condensation inside the hopper.
91:
rectangular or circular in cross section but have sides that slope at about a 60° angle. Slanted sides make it easier for the contained material to flow out. Conveyors are sometimes used to carry away the particulate matter.
86:
Materials can be added either manually or automatically to the top of a hopper. For dust collection, it enters the hopper from a collection device. For example, baghouses are shaken or blown with
146:
104:
installed on the outer walls of a hopper to shake and release the material, however other kinds of discharging aids can be considered if necessary.
121:
191:
150:
32:
196:
56:
171:
19:
125:
8:
172:"How to solve powder flow problems in silos (Bad flow, no flow) - Arching / Ratholes"
47:
87:
52:
185:
43:
80:
60:
75:
35:
64:
39:
183:
42:container used in industrial processes to hold
23:Plastic pellets going into an extruding machine
147:"Electrostatic Precipitator Knowledge Base"
16:Container used to funnel particulate matter
122:"How an Electrostatic Precipitator Works"
74:
18:
94:
184:
13:
14:
208:
79:A wooden hopper for grain, on a
164:
139:
114:
1:
192:Air pollution control systems
107:
7:
63:. Most hoppers are made of
57:electrostatic precipitators
10:
213:
70:
61:baghouses/fabric filters
83:
24:
78:
22:
95:Important components
84:
44:particulate matter
25:
197:Material handling
48:flowable material
204:
176:
175:
168:
162:
161:
159:
158:
149:. Archived from
143:
137:
136:
134:
133:
124:. Archived from
118:
212:
211:
207:
206:
205:
203:
202:
201:
182:
181:
180:
179:
170:
169:
165:
156:
154:
145:
144:
140:
131:
129:
120:
119:
115:
110:
97:
73:
53:dust collectors
17:
12:
11:
5:
210:
200:
199:
194:
178:
177:
163:
138:
112:
111:
109:
106:
96:
93:
88:compressed air
72:
69:
15:
9:
6:
4:
3:
2:
209:
198:
195:
193:
190:
189:
187:
173:
167:
153:on 2009-02-01
152:
148:
142:
128:on 2011-07-29
127:
123:
117:
113:
105:
101:
92:
89:
82:
77:
68:
66:
62:
58:
54:
49:
45:
41:
37:
34:
30:
21:
166:
155:. Retrieved
151:the original
141:
130:. Retrieved
126:the original
116:
102:
98:
85:
31:is a large,
28:
26:
186:Categories
157:2011-07-18
132:2011-07-18
108:References
81:millstone
36:pyramidal
33:inverted
71:Process
40:conical
59:, and
29:hopper
65:steel
46:or
38:or
188::
67:.
55:,
27:A
174:.
160:.
135:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
