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Exhaust steam trap and method of use thereof

A trap and steam technology, applied in the field of exhaust steam traps, can solve the problems of steam not being fully and effectively utilized, energy waste, etc.

Inactive Publication Date: 2008-10-15
TIANJIN DONGDA CHEM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the steam with high enthalpy value cannot be used more fully and effectively, which causes a great waste of energy.

Method used

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  • Exhaust steam trap and method of use thereof
  • Exhaust steam trap and method of use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: Pour toluene into the oxidation tower, open the saturated boiler steam valve, and use 0.8Mpa saturated boiler steam to heat up the toluene at normal temperature. When the temperature of toluene reaches 120°C, ventilation is started, and the temperature continues to rise to 160°C, and then the saturated boiler steam valve is closed. At this time, the saturated boiler steam used for heating the toluene has become exhausted steam, and all exhausted steam is collected by the exhausted steam trap (referred to as boiling pot) collected. Close the gas outlet b1-3, close the lower water outlet c, open the lower M-water outlet, and transport the condensed water with a temperature of 90-95°C to the coil that was originally heated for toluene in the oxidation tower. The cooling has been 160°C~ For toluene at a temperature of 175°C, adjust the opening of the condensate valve at any time to keep the temperature of the toluene at about 160°C relatively stably.

Embodiment 2

[0029] Embodiment 2: when the steam pressure in the upper half of the exhaust steam trap (abbreviation: boiling pot) reaches 0.2Mpa~0.3Mpa, and the temperature is 133°C~143°C, close the gas outlets (b2), (b3), and close The water outlets c and M are sent to the benzoic acid production system from the b1-steam outlet for the drying process of the tail gas adsorber.

Embodiment 3

[0030] Embodiment 3: In embodiment 2, the steam pressure on the upper part of the exhaust steam trap (abbreviation: boiling pot) reaches 0.2Mpa~0.3Mpa, and the temperature: close the gas outlet (b1), (b3) when the temperature is 133°C~143°C , close the water outlets c and M, and transport them to the refined benzoic acid production system from the b2- steam outlet for use in the drying process.

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Abstract

The invention relates to the utilization of steam, in particular to the utilization of boiler steam during the benzoic acid production process, which provides a dead steam catcher and the application thereof. The dead steam catcher adopts the structure that a steam-water separating valve is arranged at the middle upper part of the dead steam catcher, a steam-water separating disk is arranged at the middle lower part of the dead steam catcher, an steam inlet is formed between the steam-water separating valve and the steam-water separating disk, three steam outlets are formed at the top part of the dead steam catcher, and two water outlets are formed at the lower part of the dead steam catcher. The novel energy-saving equipment of the dead steam catcher (for short: boiling boiler) is adopted during the benzoic acid production process to collect the dead steam, which is generated after the toluene in an oxidation column is heated by the saturated boiler steam, so that the pressure of the dead steam is effectively maintained, and the maximum temperature of the dead steam, namely the enthalpy of the dead steam is also maintained, and can be reused for the production system.

Description

technical field [0001] The invention relates to the utilization of steam, especially the utilization of boiler steam in the production process of benzoic acid, and proposes a exhaust steam trap and a use method thereof. Background technique [0002] In the production process of benzoic acid, the main chemical reaction process is the oxidation reaction of toluene. Before oxidation, it is necessary to raise the temperature of the normal-temperature toluene in the oxidation tower to 160-165°C. 0.8Mpa saturated boiler steam is used for heating and temperature rise, and the steam temperature reaches 170-175°C. The boiler steam used after heating and heating becomes exhausted steam, referred to as exhausted steam. At present, most manufacturers use this part of exhausted steam only as daily steam for heating, heating water and so on. In this way, the steam with high enthalpy value cannot be fully and effectively utilized, resulting in a great waste of energy. Contents of the ...

Claims

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Application Information

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IPC IPC(8): C07C51/16C07C63/06B01J19/00
CPCY02P20/10
Inventor 赵富贵
Owner TIANJIN DONGDA CHEM GRP
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