Nickel-based catalyst as well as preparation method and application thereof

A nickel-based catalyst precursor comprises an active component, an adhesive and a composite carrier, the active component is a mixture of nickel and magnesium oxide, the composite carrier is one or more of silicon oxide, aluminum oxide, cerium oxide, zirconium oxide and a molecular sieve, and the nickel-based catalyst precursor is obtained through spray molding and can efficiently and stably remove sulfur in benzene; the invention also provides a preparation method of the catalyst precursor, which comprises the following steps: 1) taking materials according to the proportion, and uniformly stirring and mixing other components except the adhesive in deionized water to obtain a turbid liquid A with the solid content of 30-50wt%; (2) homogenizing and dispersing the turbid liquid A for 1-3 hours under a cold water bath condition; 3) adding 1-5% of an adhesive to form a turbid liquid B; (4) homogenizing and dispersing the turbid liquid B for 1-3 hours under a cold water bath condition; and ...

Method for measuring dissociation calcium oxide content in calces

The invention provides a method to measure the content of free calcium oxide in quicklime in the field of stack gas desulfurization, which makes use of the intermixture of acetoacetic ester and 2-butyl alcohol to selectively extract the free calcium oxide in the quicklime under the conditions of boiling, back flow and chilling, and separates other solid which consumes the standard solution of hydrochloric acid, such as CaCO3, in quicklime, and insoluble sludge in the quicklime; and then analyzes the calcium oxide in the filtered solution with hydrochloric acid by titration; and then calculates out the content of the free calcium oxide in the quicklime. Operations in respect of the method are simple; the content of free calcium oxide is measured accurately and reliably; little reagent is used. The invention provides basis for the industrial field of the dry process stack gas desulfurization requiring to measure the content of free calcium oxide in quicklime or white lime and so on.

Pipeline rust removal device for hydraulic engineering construction

The utility model discloses a pipeline rust removal device for hydraulic engineering construction. Including a base, a water storage cavity is formed in the top end of the base; a supporting frame isfixedly arranged at the top end of the base. A first cylinder is fixedly arranged in the middle of one side of the support frame; a rotating motor is fixedly mounted on a piston rod of the first cylinder; the middle of the inner wall of the other side of the supporting frame is rotationally connected with a rotating shaft. Fixed cylinders are fixedly mounted at one end of the rotating shaft and atransmission shaft of the rotating motor; the beneficial effects of the utility model are that: the utility model discloses: the beneficial effect is: a third air cylinder is arranged to convenientlydrive a grinding sheet to be in contact with the pipeline; a polishing motor is arranged to conveniently drive a polishing sheet to rotate so as to polish the pipeline; and through the arranged driving motor ...

Equipment and method for measuring dust content in flue gas

The invention discloses an apparatus for measuring dust content of flue gas and a method thereof. The apparatus comprises a dust collecting device, a sampling device and a suction device; an outlet end of the dust collecting device is connected with an inlet end of the sampling device, and the outlet end of the sampling device is connected with the inlet end of the suction device; in the method, the flue gas passes the dust collecting device under the condition of constant speed suction, the dust in the flue gas is filtered by filter paper, and the dust content of the flue gas is calculated by weighing the weight of the filter paper before filtering the dust and the weight of the filter paper after filtering the dust and putting the weights into a formula. By the device for measuring the dust content of the flue gas, the dust content of the flue gas can be accurately analyzed. The device has the advantages of novel design, simple structure and easy implementation, and is very applicable ...

SIP (session initiation protocol)-based system and method for achieving VOIP (voice over Internet protocol) network state monitoring

The invention relates to SIP (session initiation protocol)-based system and method for achieving VOIP (voice over Internet protocol) network state monitoring. The system comprises an SIP stack module, a call control module, a network state processing module and an application layer module. According to the SIP-based system and method for achieving VOIP network state monitoring employing the structure, a normal message request packet which is sent to a protocol stack under the condition that the protocol stack is not affected can be subjected to SIP message packet assembly through a network state management module to form a message request packet including the network state; an SIP signaling packet with the network state is sent out; the received SIP response message with the network state can be correctly analyzed to extract the network state; the message packet can be reassembled; the packet of which the protocol stack can be normally identified is restored and is transmitted downwards ...

Method for achieving three-party calling based on SIP protocol call waiting service

The invention relates to a method for achieving three-party calling based on SIP protocol call waiting service. The method for achieving the three-party calling based on the SIP protocol call waiting service comprises the steps that a first terminal and a second terminal establish calling; a third terminal calls the first terminal; the first terminal receives an incoming call request of the third terminal and judges whether call waiting service is enabled or not, and the first terminal prompts the incoming call request of the third terminal in a sound playback mode; the first terminal is accessed to the third terminal and calling between the first terminal and the second terminal is kept; the first terminal is accessed to the kept second terminal again to perform three-party calling. By means of the structure and the method for achieving the three-party calling based on the SIP protocol call waiting service, three-party calling can be achieved in the call waiting service process, good usage ...

System and method for synthesizing hydroxy acid

A system for synthesizing hydroxy acid comprises a heat exchange tower, a reaction kettle, a flash tank and a rectifying tower, a filler section is arranged in the heat exchange tower, a first tower top distributor is arranged at the top of the heat exchange tower and used for being connected with a cyclohexane source, a cobalt salt catalyst inlet is formed in the side wall of the heat exchange tower, the bottom of the heat exchange tower supplies materials to the reaction kettle through a first pipeline, and a tower bottom distributor is arranged in the reaction kettle and used for being connected with a cyclohexane source. A vapor phase outlet of the reaction kettle is connected with the heat exchange tower through a second pipeline and is positioned below the filler section, a liquid phase outlet of the reaction kettle supplies materials to the flash tank through a third pipeline, and a vapor phase outlet of the flash tank is connected with the lower part of the rectifying tower through ...

Bypass-free desulphurization absorption tower system

The invention provides a bypass-free desulphurization absorption tower system, which cancels a bypass and eliminates fault points such as a booster fan, an absorption tower inlet baffle door and the like. The system comprises a desulphurization absorption tower, the bypass is not arranged between an induced draft fan and a chimney, an inlet of the desulphurization absorption tower is connected with an outlet of the induced draft fan through an air inlet flue, and the absorption tower inlet baffle door and the booster fan are not arranged between the inlet of the desulphurization absorption tower and the outlet of the induced draft fan. The bypass-free desulphurization absorption tower system cancels the bypass and eliminates the fault points such as the booster fan, the absorption tower inlet baffle door and the like, so the fault rate is reduced; and furthermore, the inlet/outlet flue, a smoke spray cooling/washing system, a corrosion prevention system, a spraying system, a slurry preparation ...

Synthesis method of camphor chiral phosphoric acid

The invention provides a synthetic method of camphor chiral phosphoric acid, which is a general reaction equation as follows: according to the technical route, chiral camphorquinone and an organic lithium reagent (or a Grignard reagent) react, an intermediate product camphor diol can be obtained with high yield, and then the camphor diol is constructed into the camphor chiral phosphoric acid by a'one-pot method '. Reagents used in the method are cheap and easy to obtain, reaction conditions are mild, operation is simple, and the novel chiral phosphoric acid can be efficiently synthesized only through two steps.

Flue fog drip test method

The invention discloses a method for testing droplets in smoke, which comprises firstly, setting a droplets sampling system, secondly, testing and calculating smoke flowing speed through an L-shape pitot tube (11), thirdly, adjusting airflow controlling valve (9a) which is on a vacuum pump of the droplets sampling system according to the testing smoke flowing speed. Droplets density can be calculated according to the quality of the droplets which are collected by a droplets collecting device. The invention adopts a constant velocity aspirating smoke method, the droplets in the smoke are collected by the droplets collecting device, droplet quality can be obtained through weighing weights of the droplets collecting device before and after collecting, and furthermore the droplets density can be obtained through formulas. Compared with a traditional method, the method needs no precise equipment tests as atomic absorption spectrometry, thereby testing data is minimized, the operation is easier ...

Clostridium thermocellum for efficiently saccharifying cellulose and application of clostridium thermocellum

The invention discloses clostridium thermocellum for efficiently saccharifying cellulose and application of the clostridium thermocellum, and relates to the field of microorganisms, in particular to the clostridium thermocellum and application of the clostridium thermocellum. The invention aims to solve the problems that the existing clostridium thermocellum is difficult to accumulate soluble sugar and is low in saccharification rate. The clostridium thermocellum for saccharifying cellulose is clostridium thermocellum FC811, and is preserved in the China General Microbiological Culture Collection Center (CGMCC), the preservation date is December 23, 2021, and the preservation number is CGMCC No: 40026. The clostridium thermocellum FC811 can degrade cellulose and accumulate soluble sugar, and the saccharification rate can be close to 60%. The clostridium thermocellum is used for degrading cellulose and accumulating soluble sugar.

Anti-icing device suitable for top of chimney

The invention discloses an anti-icing device suitable for the top of a chimney. The anti-icing device comprises a wind shield, a water collecting plate and the chimney which are connected from top to bottom. The water collecting plate comprises a vertical side and an inclined side, the lower end of the vertical side is connected with the outer edge of the upper end of the inclined side, and the outer edge of the lower end of the inclined side is connected with the top of the chimney to form a water collecting side; a water return hole is further formed in the position, on the water collecting side, of the top of the chimney. The wind shield is arranged on the periphery of the top of the chimney, disturbance of outside wind to outlet flue gas can be reduced, the flow direction of the flue gas at the top of the chimney is improved, and condensate water entrainment in the outlet flue gas is effectively reduced. Meanwhile, water baffles are arranged on the top of the chimney and the periphery ...

Flue fog drip test method

The invention discloses a method for testing droplets in smoke, which comprises following steps: firstly, setting a droplets sampling system, secondly, testing and calculating smoke flowing speed through an L-shape Pitot tube (11), thirdly, adjusting airflow controlling valve (9a) which is on a vacuum pump of the droplets sampling system according to the tested smoke flowing speed. Droplets concentrations can be calculated according to the quality of the droplets which are collected by a droplets collecting device. The invention adopts a method of constant velocity aspirating smoke, the droplets in the smoke are collected by the droplets collecting device, droplet quality can be obtained through weighing the weight of the droplets collecting device before and after collecting, and furthermore the droplets concentrations can be obtained through formulas. Compared with a traditional method, the method needs no precise equipment tests as atomic absorption spectrometry, thereby testing data ...

Method for measuring dissociation calcium oxide content in calces