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1. 发明专利

JPS56163741A METHOD FOR CONTROLLING FEED RATE OR NH3 IN DRY DENITRATION APPARATUS 失效
公开(公告)号：JPS56163741A
公开(公告)日：1981-12-16
申请号：JP6726580
申请日：1980-05-20
申请人： KAWASAKI HEAVY IND LTD
发明人： KAWASHIMA SUSHIHIKO , SUGIMOTO HIROSHI , ODA YOSHIAKI , ITOU HITOSHI
IPC分类号： B01D53/56 , B01D53/74 , B01D53/94
摘要： PURPOSE:To maintain the NOx concn. at the outlet of a reactor constant and to control the feed rate of NH3 by correcting th change in process gain by means of the flow rate of waste gas in a dry type catalytic reduction denitration method. CONSTITUTION:In the dry type catalytic reduction denitration of NOx in waste gas controlling the feeding of NH3 in order to make the NOx concn. at the outlet of the reactor constant, the signals of a waste gas flowmeter 1, an NOx densitometer 2 and a waste gas thermometer 3 are sent to an arithmetic device 9. In this device 9, the feed rate FA of ammonia is calculated and is inputted as a feed-forward signal to an adder 8. On the other hand, the signal of the NOx densitometer 4 is transmitted to a controller 10, which compares the same with a preset signal 12 and inputs the signal to a multiplier 7. Here, it is multipled by the valve of the waste gas flowmeter 1 in order to correct the process gain Kp, thereafter, it is sent as a feed- forward signal to the adder 8, which adds the same to the feedback signal, thereby controlling a valve 6 for a gaseous NH3 gas.

2. 发明专利

JPS56159415A DETECTOR FOR SAND SURFACE 失效
公开(公告)号：JPS56159415A
公开(公告)日：1981-12-08
申请号：JP6211580
申请日：1980-05-09
申请人： KAWASAKI HEAVY IND LTD
发明人： ITOU HITOSHI
IPC分类号： E02D3/08 , E02D3/10
摘要： PURPOSE:To detect the level of a sand surface at a high accuracy in a simple and easy manner by providing a weight suspended on a rope following the fluctuating sand surface in a hollow cylinder for creating a sand pile through a fixed and mobile pulleys invariably in contact therewith. CONSTITUTION:A weight 3 is connected at the tip 4a of a rope 4 to detect the level of the displacing surface of a sand 2 supplied and packed into a hollow tube 1 for creating a sand pile. On the other hand, a balancing weight 7 is securely suspended on the other end of the rope 4 via a plurality of fixed pulleys 5 and 5a in such a manner as to be free to travel vertically. The weight 7 is automatically displaced smoothly in a vertical way without delay so that a weight on the other end of the rope follows the displacement of a sand surface invariably in light contact therewith. The vertical movement of the oscillating weight 3 following the variations in the level of the sand surface 2a to detect it very accurately.

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