33results about How to "Improve the level of intrinsic safety" patented technology

The invention provides a safety control method used for a chemical heating furnace. When a material temperature indicating instrument detects that the temperature of outflow materials falls, the material temperature indicating instrument transmits signals to a controller; the controller judges whether a draught fan stop signal or an air flow rate decreasing signal exists, and if relevant signals do not exist, the operation of increasing the fuel flow rate is conducted according to an original procedure; if the controller judges that any of the draught fan stop signal or the air flow rate decreasing signal exists, the fuel flow rate is not increased, and if only the air flow rate decreasing signal exists, the fuel flow rate is decreased correspondingly according to an air flow rate decreasing index. A draught fan stop control system and an air flow rate decreasing control system are combined for use, and it can be guaranteed that after one control system is disabled, the other safety control measure can be used for ensuring the safety of the heating furnace, and flash-explosion accidents are avoided; the intrinsic securitization level of the heating furnace can be greatly raised; non-planed stop is reduced; and safe and stable operation of the heating furnace is guaranteed.

The invention discloses a metal bayonet for preparing a metal detonating cord. The metal bayonet for preparing the metal detonating cord is characterized in that the metal bayonet is of a tubular structure; the height of the metal bayonet is 50-200mm, the tube external diameter is 100-300mm, and the tube internal diameter is 1-20mm; and upper and lower end openings of the tubular metal bayonet are both provided with branched round tube openings. A cooling method of the metal detonating cord includes the steps that a low-temperature medium refrigerating machine is started at first, and the metal bayonet is pre-cooled; and when the temperature of the metal bayonet reaches -10 to 15 DEG C, a cord making machine is started until cord making is completed. By means of the metal bayonet for preparing the metal detonating cord and the cooling method, potential risks caused by a drying process at the later period of detonating cord making by a water-based single-compound explosive are overcome, and the intrinsic safety level of the detonating cord production process is increased. Compared with the mode of using a high-temperature drying system, the intrinsic safety level of production equipment is increased obviously by using a low-temperature medium; and designability of the metal bayonet of coiled metal foil is fully utilized, and the manufacturing links of the detonating cord are simplified.

The invention relates to the field of heat exchangers, and discloses a heat exchange unit and a heat exchange reactor. The heat exchange unit includes a base (4), a heat exchange medium channel (1) and a reaction fluid channel ( 2), characterized in that the heat exchange medium channel (1) is located at the center of the heat exchange unit, and a plurality of the reaction fluid channels (2) are scattered and wrapped outside the heat exchange medium channel (1); wherein, the The heat exchange medium channel (1) is parallel to the axial direction of the reaction fluid channel (2). For the highly risky strong exothermic reaction process, the control of stable process parameters and the improvement of passive intrinsic safety level can be realized.

The invention discloses a preparation method and application of a molybdenum catalyst. The method firstly reacts pentaerythritol and ethylene oxide to prepare macromolecular alcohol; and then reacts the macromolecular alcohol and ammonium dimolybdate in the presence of a solvent to prepare Molybdenum catalyst solution. The molybdenum catalyst can be used in the epoxidation reaction of styrene. Under the reaction conditions, the catalyst is in a homogeneous state. After the reaction is completed, the catalyst can be precipitated from the epoxidation reaction liquid by cooling down, and the catalyst can be obtained by simple separation. The method can effectively improve the conversion rate of styrene and peroxide, effectively reduce the content of by-products, improve the selectivity of the product ethylene oxide, the catalyst is easy to recover, and the molybdenum catalyst can be recycled and applied, which is a green synthesis method. craft.

The invention discloses a demoulding device and method in automatic electric detonator assembling. The demounting device comprises a clamping body and a demounting device body. A wire assembling groove is formed in the middle of the clamping body. A mounting hole and a positioning hole which are of a through hole structure are formed in the clamping body. A wire mounting groove communicated with the wire assembling groove and the mounting hole are formed in the clamping body. The demoulding device body comprises a fixing plate. A guide hole is formed at the bottom of the fixing plate. An air cylinder corresponding to the position of the guide hole is disposed above the guide hole. The air cylinder is mounted on the fixing plate. An electric detonator wire group demoulding air cylinder is disposed at the top of the fixing plate. An electric detonator wire group demoulding working plate is disposed at the bottom of the n electric detonator wire group demoulding air cylinder. Guide columns are disposed between the top and the bottom of the fixing plate.

The invention discloses a subsurface defect detection device and method based on an alternative current electromagnetic field. The subsurface defect detection device comprises an excitation coil, a magnetic core, a detection coil, a signal adjuster, an A / D (Analog-to-Digital) acquisition card, a computer, a power supply, a pulse signal exciter and a power amplifier. Compared with the prior art, the subsurface defect detection device generates a periodic pulse signal through a pulse signal generator, the periodic pulse signal is applied to an excitation probe, then an alternating pulse magnetic field is sensed on the subsurface and the deep layer of a workpiece, filtering and denoising are continued by a signal modulation circuit, the data acquisition card based on a USB (Universal Serial Bus) is adopted for acquisition, an instantaneous signal analysis method is adopted to draw sensation voltage signal peak value waveforms in the BX direction and the BZ direction, and thus intelligent recognition and quantification on subsurface defects and deep layer defects are achieved. By virtue of the subsurface defect detection device and method, the defects of a deep layer defect alternative current electromagnetic field detection technique are effectively made up, and a completely novel method is provided for high-sensitivity comprehensive rapid quantitative recognition on subsurface detects and deep layer detects of a structural body, and the essential safety level of a facility structure is improved.

A ground remote control system for underground electric locomotives belongs to the technical field of underground mining. Including ore distribution unit, locomotive unit, operation unit, ore loading unit, ore unloading unit; ore distribution unit includes digital ore distribution system and car dispatching system; locomotive unit includes underground electric locomotive transportation system, electric locomotive automatic protection system; operation The unit includes an underground narrow-gauge "signal collection and closing" control system, an operating console system, a wireless communication system, a 100M network communication system, and an uninterruptible power supply system; The mining unit includes an automatic unloading system and an automatic cleaning system for unloading. The advantages are: the work of the driver of the electric locomotive and the mine worker are combined into one, and the working position is moved from the underground to the ground, which improves the level of intrinsic safety, avoids the occurrence of occupational diseases, ensures the safe and efficient operation of the electric locomotive, and simplifies Operation, improve the operation rate of electric locomotives, improve the efficiency of electric locomotives, improve the efficiency of production organization, and improve the stability of output grades.