发明名称 |
METHOD AND APPARATUS FOR APPLYING A MINIMUM FLOW OF ANHYDROUS AMMONIA AT TARGETED RATES DUE TO LIMITATIONS EXISTING IN CURRENT DISTRIBUTION/DELIVERY |
摘要 |
<p>The invention provides an apparatus and method for enabling at least a minimum pressure and flow rate of stored NH3 from a storage tank to knives for injection into soil, regardless of ambient temperature. A pressure sensor and control valve monitors the pressure of the NH3 flow. If the sensed pressure drops below a desired minimum, e.g., 0.5 psi, a controller drives the control valve to open and also signals ramping up of a boost pump. The boost pump pumps NH3 from the storage tank to ensure maintenance of a minimum flow rate and pressure of NH3 from the tank to the soil. The pump runs on-demand only as needed, thereby reducing power requirements when the pump is not needed to supplement NH3 tank pressure.</p> |
申请公布号 |
CA2750205(A1) |
申请公布日期 |
2012.02.23 |
申请号 |
CA20112750205 |
申请日期 |
2011.08.22 |
申请人 |
RAVEN INDUSTRIES, INC. |
发明人 |
BALLARD, JEFF;JENSEN, STEVE S.;PERSON, NOEL A.;THOMPSON, WARREN L. |
分类号 |
A01C23/04;A01C23/02 |
主分类号 |
A01C23/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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