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          Cllections of Authorized Patents of Wengfu Group in 2012

 NO

 Designation

1

The method for high-pressure nitrogen back flushing dredging and leading pressure system

2

 The method for recycling arsenic sulfide from arsenious waste residue  

3

 Phosphoric acid purifying plant77

4

 Phosphoric acid purifying plant72

5

 Phosphoric acid purifying plant73

6

 Phosphoric acid purifying plant74

7

 Phosphoric acid purifying plant75

8

 Phosphoric acid purifying plant76

9

 Phosphoric acid purifying plant77

10

 Phosphoric acid purifying plant78

11

 Phosphoric acid purifying plant79

12

 Phosphoric acid purifying plant80

13

 Conveyor device for electronic grade chemicals

14

 The method for dealing with ammonia nitrogen waste water of phosphatic fertilizer enterprise

15

 Production method for high-purity crystalline orthophosphoric acid 

16

 Loading system for liquid ammonia

17

 PLC control system of drilling machine engine

18

 Cascade utilization method of steam produced during production of ammonium phosphate

19

 Filter unit for electronic chemicals

20

 Vacuum wash mill for recycling iodine from rare phosphoric acid

21

 Multi-function belt conveyor

22

 Reparation method of roaster cooling grid of pyrites making acid

23

 Online washing method of sulfuric acid device liquid, liquid heat exchanger

24

 High-precision differential pressure type flowmeter

25

 Device making use oftail gas washing substancefor producing ammonium phosphate

26

 Offset sampling tube

27

 Prilling dryer for producing granular ammonium sulfate

28

 Vacuum separation device of electronic chemicals

29

 Tail gas dust pelletizing system for ammonium phosphate production

30

 Anti blocking crystallizer

31

 Heat energy recycling method for low-temperature sulphuric acid production 

32

 The method for producing granular MAP by DAP device 

33

 The device for quick producing ultrapure water

34

 Comprehensive utilization method for ammonium phosphate waste water 

35

 Laying-off controlling device of phosphatic fertilizer packer

36

 Automatic radiating device for solid material during transportation 

37

 The method for producing granular ammonium sulfate products by inorganic binder

38

 Control system of panfilter

39

 Cycle water flow measuring device of phosphoric acid production 

40

 Moisture absorption of transformer 

41

 Intelligent control device for preventing overspeed of motor

42

 Hand-lever self-locking device

43

 The device for replacing ball mill lining plate

44

 Pulp recovery device of waste water pond 

45

 Belt sweeper

46

 Y-type pipeline filter

47

 The dredging device of pump suction pipe bottom valve

48

 Viscous slurry sampling device

49

 Tail gas dust collection device of ammonium phosphate production 

50

 Pipeline leakage-proof device

51

 High-purity chemicals production cooling device

52

 Actuating mechanism of pneumatic control valve

53

 Leakage warning device of hydrogen sulfide based on short message

54

 Device for producing MAP powder from spent acid

55

 Storage battery cradle of power-driven forklift

56

 Dissolver for high-purity chemicals

57

 Crystallizer of electronic grade chemicals

58

 Roller sweeper for conveyor belt

59

 Earthed system for liquid loading and unloading arm

60

 Leaking stoppage device for phosphoric acid storage tank

61

 Air-condition monitoring system

62

 Plate-type feeding anti-slip device

63

 Fast unloading shipping sack

64

 Porous quincunx flame sprayer

65

 Cone base of iodine extraction tower

66

 Dust collection device by sound wave during pyrites making acid

67

 Anti-offset device of conveyor

68

 Dummy load device for anodic protection potentiostat

69

 Fast pin-pulling device

70

 Heavy hinge pin roll dismounting device

71

 Gearing of dryer barrel and rolling ring

72

 Method for producing particle ammonium sulfate products by organic and inorganic binder

73

 Method for producing granular MAP with added trace elements

74

 Twist lock open and shut detection device of container lifting appliance

75

 Dryer for sulfur fertilizer production

76

 Method for enhancing nitrogen element of DAP

77

 Method for producing granular MAP by extraction of spent acid

78

 Plugged valve locating device

79

 Mechanical seal device of phosphorate slurry pump spindle 

80

 Advanced plunger sealing device of ammonium phosphate slurry pump

81

 Anti-scaling method for wet process phosphoric acid concentration heat exchanger

82

 Separation device for conveying solid material

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