Tianhua Institute of Chemical Machinery and Automation

Lanzhou, China

Tianhua Institute of Chemical Machinery and Automation

Lanzhou, China

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Patent
Tianhua Institute of Chemical Machinery and Automation | Date: 2017-03-29

The present invention relates to a method for drying high moisture, low calorific value lignite for a generating set and recovering water contained therein and an apparatus thereof, which mainly consisting of a rotary steam tube dryer, a washing cooling tower, a coal mill, a 1st bag filter I, a condenser, a weighing surge bunker, a water ring vacuum pump and so on. In the present invention, a drying system is integrated with a milling system, every dryer and the corresponding coal mill are disposed and are directly connected via a surge bunker, thereby not only saving the heat lost during the transportation of pulverized coal, but also omitting a long-distance transportation from a conventional drying system to a conventional milling system, effectively avoiding such phenomena as dust pollution, waste and spontaneous combustion during transportation and transshipment, simplifying the coal preparation system employed in the front-end process of drying.


Patent
Tianhua Institute of Chemical Machinery and Automation | Date: 2017-03-29

The present invention relates to a method for processing acetic acid solvent in an oxidising unit of a PTA industrial apparatus; said method uses a pressure filter machine to filter crude terephthalic acid slurry, and then, using a multi-stage counter-current method, uses washing water to wash the acetic acid solvent, and, by means of setting up a bias-current and drainage, prevents residual liquid in the filtrate pipe from entering the next area following the rotation of the pressure filter machine, improving washing efficiency and reducing the amount of washing water; the present invention integrates the processes of filtering and washing crude terephthalic acid into a single pressure filter machine, such that the process is shorter, the occupied floor space is reduced, and energy consumption is lower. A method feeding nitrogen gas into the mother liquor tank and washing liquid tank is used to regulate the pressure balance of the system.


Patent
Tianhua Institute of Chemical Machinery and Automation | Date: 2017-03-01

The present invention relates to a solvent exchanger and a method for improving the exchange efficiency of a CTA solvent. The method comprises the following steps: (1) pressurizing a CTA slurry into a solvent exchanger for separation and respectively obtaining a mother liquor, a bias flow mother liquor and a suspended matter A; (2) washing the suspended matter A to respectively obtain a primary filtrate, a bias flow primary filtrate and a suspended matter B; (3) washing the suspended matter B to respectively obtain a secondary filtrate, a bias flow secondary filtrate and a suspended matter C respectively; (4) washing the suspended matter C to respectively obtain a tertiary filtrate, a bias flow tertiary filtrate and a suspended matter D; (5) washing the suspended matter D to respectively obtain a fourth filtrate, a bias flow fourth filtrate and a suspended matter E; (6) washing the suspended matter E to respectively obtain a fifth filtrate, a bias flow fifth filtrate and a filter cake, wherein the bias flow fifth filtrate is guided to a bias flow filtrate tank by a suction machine unit ; and (7) after the washing is finished, back-flushing the filter cake and then pulping to obtain a slurry, and discharging. By means of improvements in both the technological process and the equipment structure, the invention greatly reduces the energy consumption and improves the solvent exchange efficiency.


Patent
Tianhua Institute of Chemical Machinery and Automation | Date: 2015-01-09

A solvent exchanger and a method is provided for: pressurizing a CTA slurry into a solvent exchanger for separation and obtaining a mother liquor, a bias flow mother liquor and a suspended matter A; washing the suspended matter A to obtain a primary filtrate, a bias flow primary filtrate and a suspended matter B; washing the suspended matter B to obtain a secondary filtrate, a bias flow secondary filtrate and a suspended matter C; washing the suspended matter C to obtain a tertiary filtrate, a bias flow tertiary filtrate and a suspended matter D; washing the suspended matter D to obtain a fourth filtrate, a bias flow fourth filtrate and a suspended matter E; washing the suspended matter E to obtain a fifth filtrate, a bias flow fifth filtrate and a filter cake; and after finished, back-flushing the filter cake and then pulping to obtain a slurry, and discharging.


The present invention relates to a method for drying high moisture, low calorific value lignite for a generating set and recovering water contained therein and an apparatus thereof, which mainly consisting of a rotary steam tube dryer, a washing cooling tower, a coal mill, a 1st bag filter I, a condenser, a weighing surge bunker, a water ring vacuum pump and so on. In the present invention, a drying system is integrated with a milling system, every dryer and the corresponding coal mill are disposed and are directly connected via a surge bunker, thereby not only saving the heat lost during the transportation of pulverized coal, but also omitting a long-distance transportation from a conventional drying system to a conventional milling system, effectively avoiding such phenomena as dust pollution, waste and spontaneous combustion during transportation and transshipment, simplifying the coal preparation system employed in the front-end process of drying.


Patent
Tianhua Institute of Chemical Machinery and Automation | Date: 2013-06-25

A dehumidifying tower having a washing section, a flash-distilling section, and a condensing section. In the washing section, exhaust gas is washed with a cooling liquid to remove at least a portion of solid dust entrained in the exhaust gas, cool the exhaust gas, and condense at least a portion of moisture in the exhaust gas into liquid. The flash-distilling section flash-distills the cooling liquid used in the washing section to produce a cooled cooling liquid and a cooling liquid vapor. Cooling liquid produced by flash-distillation enters the washing section. The flash-distilling section is in gas-phase isolation from the washing section. The condensing section condenses the cooling liquid vapor produced by flash-distillation. The condensing section is configured to be in gas-phase communication with and liquid-phase isolation from the flash-distilling section, and be in both gas-phase and liquid-phase isolation from the washing section.


Patent
Tianhua Institute of Chemical Machinery and Automation | Date: 2013-03-13

A method is provided for purifying and recycling water vapor from a coal drying process and device which employ temperature reduction and dehumidifying, a flash distillation, and vacuum condensation. With a condensed tower, a high humidity exhaust gas is preliminarily lowered in temperature, and condensed water of 560 C. is pumped, are received, vapor-liquid reverse contact is performed, and temperature reduction and dehumidifying occurs. With a flash distillation tank and a demisting washer, condensed water of 40100 C. pumped by the flash distillation water pump is performed on vacuum flash distillation, water vapor of 560 C. evaporated in the flash distillation tank enters into the demisting washer to be dehumidified and then into a vapor condenser. With a condenser and a water ring vacuum pump, water vapor of 560 C. is condensed through mist eliminating and washing by the demisting washer, condensed water is recycled, and non-condensable gas is discharged.


Patent
Tianhua Institute of Chemical Machinery and Automation | Date: 2013-12-16

A method and device are provided for purifying and recycling water vapor from a coal drying process. Included are a temperature-lowering and dehumidifying process, a flash distillation stripping process, and a vacuum condensing process. A condensing tower receives a temperature-lowered exhaust gas with high humidity from a cooling tube and a condensed water of 560 C. from a flash distillation tank, allowing the exhaust gas and the condensed water to contact each other in a vapor-liquid reverse manner, to lower the temperature and dehumidify the exhaust gas. The flash distillation tank performs a vacuum flash distillation to the condensing water pumped therein from the condensing tower. Water vapor of 560 C. evaporated through flash distillation in the flash distillation tank enters into the demisting washer to be dehumidified and then is condensed. The condensed water in the vapor condenser is transferred into a recycled water tank. Non-condensable gas is discharged out.


Patent
Tianhua Institute of Chemical Machinery and Automation | Date: 2013-05-15

A device for recovering SiCl_(4 )slurry and method for the same, comprising a paddle dryer for receiving SiCl4 slurry containing chlorosilane; a first spray scrubber for receiving exhaust gas from the paddle dryer; a condenser for condensing and recovering the purifying exhaust gas from the first spray scrubber and discharging supersaturated vapor that after condensation and separation; a defogging separator for removing liquid droplets from supersaturated vapor which is cooled by the condenser; a hydrolysis tank for receiving and hydrolyzing a paste-like slurry from the paddle dryer and vapor from the defogging separator to produce mixture and exhaust gas; a drum pressure filter for receiving neutralization products from a neutralization stirring tank.


Patent
Tianhua Institute of Chemical Machinery and Automation | Date: 2013-09-04

The invention relates to an exhaust gas separating tower, comprising a washing section, a flash-distilling section above the washing section, and a liquid seal means between the flash flash-distilling section and the washing section. The washing section is configured for washing exhaust gas entering the tower with a cooling liquid to at least partially remove solid dust entrained in the exhaust gas, cool the exhaust gas, and condense at least a portion of moisture in the exhaust gas into liquid. The flash-distilling section is configured for flash-distilling the cooling liquid from the washing section to produce a cooled cooling liquid and a cooling liquid vapor. The liquid seal means is configured so that the cooling liquid produced by flash-distillation can enter the washing section through the liquid seal means while the flash-distilling section is in gas-phase isolation from the washing section, wherein a pressure in the flash-distilling section is lower than that in the washing section.

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