Two-set benzoic anhydride reaction device employing public air feeding system and operation method thereof

Process of reducing esterification time in plasticizer production

The invention belongs to the technical field of plasticizer production, in particular to a process for reducing esterification time in plasticizer production. In the process, the alcohol raw materials are composed of 85%-90% of unused alcohols and 10%-15% of recovered alcohols; the unused alcohols and the recovered alcohols are separately fed; firstly the unused alcohols are fed into an esterification reaction kettle; and then the recovered alcohols that are preheated to 90 DEG C-95 DEG C are sprayed in an atomized state from the top of an esterification tower, after the temperature of the esterification reaction kettle rises to 130 DEG C-135 DEG C. The process is easy to operate, increases the exchange efficiency of the tower, shortens the esterification period, increases the yield, reduces the energy consumption and the cost, and increases the economic benefit.

Method for reutilization of wastewater in elasticizer production

The invention belongs to the field of the manufacturing process of plasticizer, and in particular relates to a method for recycling the waste water generated during the process. The method comprises the following steps: collecting the waster water generated in the steps of esterification and reduced pressure distillation and dealcoholization; and then neutralizing part of the waste water for preparing alkali liquor, and using the other part of the waster water for washing. The process can not only recycle the waster water and reduce the discharge amount, but also save the usage of one-time soft water, reduce the manufacturing cost for an enterprise, and facilitate environmental protection.

Method for reutilization of wastewater in elasticizer production

The invention belongs to the field of the manufacturing process of plasticizer, and in particular relates to a method for recycling the waste water generated during the process. The method comprises the following steps: collecting the waster water generated in the steps of esterification and reduced pressure distillation and dealcoholization; and then neutralizing part of the waste water for preparing alkali liquor, and using the other part of the waster water for washing. The process can not only recycle the waster water and reduce the discharge amount, but also save the usage of one-time soft water, reduce the manufacturing cost for an enterprise, and facilitate environmental protection.

Reutilization method for low pressure by-product steam in benzoic anhydride producing process

The invention relates to a method for recycling low pressure byproduct steam in the process of phthalic anhydride production. The method comprises the following steps: the low pressure byproduct steam is collected in a recoverer and subjected to steam-water separation and flash evaporation to obtain secondary flash steam; and when the pressure of the secondary flash steam accumulated in the recoverer reaches a set value, the flash steam is output through a one-way valve and is utilized. The method has the advantages that the method recycles the prior externally-exhausted steam and achieves the aims of energy conservation, emission reduction and consumption reduction well.

Angle regulatable cutting and binding implement

An angle-adjustable cutting and binding machine is composed of a bench, a sawing unit, a binding unit, a sawing angle regulator and a binding angle regulator. Said sawing angle regulator consists of an angle divider with several angle dividing holes and a baffle plate. Said binding angle regulator comprises a base plate, an angle dividing plate with several angle dividing holes and a clamp plate.

Process for producing polyol benzoate (DEDB)

The invention belongs to the field of production technologies of plasticizer, particularly relates to a process for producing polyol benzoate (DEDB). In the process, polyalcohol and benzoic acid are used as raw materials for performing esterification, and then separation and purification are carried out, wherein overdose of the raw material polyalcohol is added. The process is simple, short in production cycle and is 1-2h shorter than that of a traditional process; moreover, the consumption of alkali for neutralization is reduced by more than 50%, the generated wastewater is reduced by more than 25%, the production cost is reduced by 10-20%, byproducts generated by benzoic acid are reduced, and the quality of the finished product is improved.

Two-set benzoic anhydride reaction device employing public air feeding system and operation method thereof

The invention relates to a device which adopts two sets of phthalic anhydride reaction devices of a common wind supply system and an operating method. The device consists of two sets of phthalic anhydride reaction devices and fans which are matched with the phthalic anhydride reaction devices, the invention further comprises a motor and a steam turbine, which are respectively connected with two fans in series; the fan which is connected with the motor in series is connected with one set of the phthalic anhydride reaction device, a steam outlet of the set of the reaction device is connected with the steam turbine; the steam outlet of the other set of phthalic anhydride reaction device is also connected with the steam turbine; the fans which are connected with the steam turbine in series are respectively connected with the two sets of reaction devices. As the invention only needs one motor to provide the starting energy for one set of the reaction device, a subsequent reaction device can ...

Reutilization method for low pressure by-product steam in benzoic anhydride producing process

The invention relates to a method for recycling low pressure byproduct steam in the process of phthalic anhydride production. The method comprises the following steps: the low pressure byproduct steam is collected in a recoverer and subjected to steam-water separation and flash evaporation to obtain secondary flash steam; and when the pressure of the secondary flash steam accumulated in the recoverer reaches a set value, the flash steam is output through a one-way valve and is utilized. The method has the advantages that the method recycles the prior externally-exhausted steam and achieves the aims of energy conservation, emission reduction and consumption reduction well.

Electric igniter for thermit reaction

The electric igniter comprises an outer shell, two inserting openings are formed in the bottom end of the outer shell, metal plates are fixedly connected to the inner walls of the two inserting openings, the outer side of the middle of the outer shell is fixedly sleeved with a connecting ring block, a first connecting part is installed on the connecting ring block, and a first limiting part is arranged on the inner wall of the outer shell; the cap is arranged at the top of the outer shell in a sleeving mode, a second connecting part is fixedly connected to the bottom end of the cap, and the first connecting part is detachably connected with the second connecting part; the inner shell is located in the outer shell, a limiting sliding block is fixedly connected to the outer wall of the inner shell, the limiting sliding block is in sliding connection with the first limiting part, a second limiting part is installed on the limiting sliding block, the first limiting part is in limiting connection ...

Sequential three-dimensional image matching method based on prior information conduction

The invention discloses a sequential three-dimensional image matching method based on prior information conduction and belongs to the field of navigation and automatic control technology. According to the sequential three-dimensional image matching method based on prior information conduction, firstly, left and right eye intensive feature point matching is conducted on a first pair of three-dimensional images, then matching of each pair of three-dimensional images uses a matching result of a former pair of three-dimensional images as guiding information from a second pair of three-dimensional images, finally, with a matching result of currently formed left and right eye images serving as guiding information, all the operations are repeated for a next formed l three-dimensional image pair at an adjacent visual angle to obtain the matching results of all the images in the entire continuous imaging sequence. The sequential three-dimensional image matching method based on prior information ...

Electric power system distribution is with multi -functional insulating tool box

Electric power system distribution is with multi -functional insulating tool box for the realization being accomodate and taking electric power tool's. Including articulated box body and the lid of connecting, be equipped with the handle on the lid, be equipped with first baffle and second baffle in the inboard of box body, it is first, the second baffle sets up three cavity with the left right -of -center in political views of inner chamber share of box body, be equipped with the layer board in the cavity of intermediate position, be equipped with the track board in two cavities controlling both ends, two track boards fall into three mutually independent drawer chamber with the cavity, slidable mounting has a drawer in each drawer chamber, first, be equipped with locking mechanism on the baffle, six drawers and six locking mechanism one -to -ones, be equipped with the release spring between left three drawer and second baffle, also be equipped with the release spring between the three ...

Constellation configuration keeping method and system based on reference configuration dynamic determination strategy

The invention belongs to the technical field of spaceflight measurement and control, and relates to a constellation configuration keeping method and system based on a reference configuration dynamic determination strategy, and the method comprises the steps: determining the reference configuration of a current constellation according to the satellite average orbit parameter of the current constellation; calculating the real-time configuration of the current constellation relative to the reference configuration according to the determined constellation reference configuration; calculating the actual configuration deviation evolution condition of the current constellation relative to the reference configuration in a future period of time; and according to the current configuration deviation and the configuration deviation evolution condition, determining satellites needing configuration maintenance in a period of time in the future according to a set configuration threshold, and calculating ...

Process for producing acet-tributyl citrate

The invention relates to a process for producing acetyl triethyl citrate. The method comprises the following steps: using citric acid and n-butanol as raw materials, firstly carrying out esterification reaction under the action of a catalyst, directly using waste heat to reduce pressure and remove alcohol after carrying out the esterification reaction completely, so as to obtain a crude product of triethyl citrate, and then carrying out acetylation reaction, and finally carrying out the processes of removing acid, neutralizing, water rinsing, reducing pressure and distilling, decoloring and filtering, so as to obtain the acetyl triethyl citrate. The process has the advantages of consice process, short production period reduced about 3h, low equipment investment, low discharge amount reduced about 30 percent, low energy consumption, and production cost reduced about 10 to 20 percent.