CN101879424A

CN101879424A - Atmospheric charging technology of hydrogenation reactor

Info

Publication number: CN101879424A
Application number: CN 201010226677
Authority: CN
Inventors: 孙鲁; 王家臣; 邢庆涛; 吕成伟
Original assignee: Shandong Futian Pharmaceutical Co Ltd
Current assignee: Shandong Futian Pharmaceutical Co Ltd
Priority date: 2010-07-15
Filing date: 2010-07-15
Publication date: 2010-11-10
Anticipated expiration: 2030-07-15
Also published as: CN101879424B

Abstract

The invention discloses an atmospheric charging technology of a hydrogenation reactor, which belongs to the technical field of functional sugar production. The novel technology is dispensed with a high-pressure pump, a primary and a secondary diaphragm pumps as well as primary and secondary hydrogenation fluid pumping equipment, changes the original process steps, changes high pressure charging into static pressure charging, and simultaneously is added with a return pipeline and a return tank to collect hydrogen, so materials enter a reactor under atmospheric pressure or low pressure to have hydrogenation; and the technology comprises the following steps: 1, mixing, 2, charging, 3, hydrogenering, 4, discharging, 5, hydrogen refluxing, 6, catalyst handling, and 7, preparing for the next hydrogenation. The invention has the beneficial effects of small charging pressure, small potential safety hazard, saved equipment cost, reduced pump consumption and maintenance cost, very good effect and considerable benefit, and especially has lowered hydrogen consumption and saves and recycles hydrogen.

Description

A kind of atmospheric charging technology of hydrogenation reactor

Technical field

The invention belongs to technical field of functional sugar production, be specifically related to the improvement of sugar alcohol hydrogenation technology.

Background technology

Maltitol, xylitol, D-sorbite are function starch sugar products, are widely used in the industries such as light industry, food, chemical industry.In traditional hydrogenation reaction, liquid glucose is got in the hydrogenation reaction kettle by feed pipe, and catalyst is got in the hydrogenation reaction kettle by membrane pump, under the effect of HTHP, catalyst, hydro-reduction, liquid glucose is converted into alcohol, and in the traditional handicraft, high pressure charging is adopted in the reactor charging, after last still discharge finishes, the still internal pressure is generally 2.0-3.0Mpa, and then with high pressure charging pump dnockout in reactor, has advanced material back still internal pressure and be generally about 7.0Mpa; In such cases, the charging resistance is big, and feed time is long, and high pressure charging pumping unit serious wear, especially high-pressure pump plunger are changed frequent; In addition, in the fill process,, cause the pipe-line equipment vibrations violent, very big potential safety hazard is arranged because the still internal pressure increases always.

Summary of the invention

The purpose of this invention is to provide a kind of atmospheric charging technology of hydrogenation reactor, reduce the reactor feed pressure, reduce equipment loss, eliminate safe hidden trouble with expectation, in addition can also recovery section hydrogen, play the effect of saving cost.

The technical scheme that the present invention solves its technical problem employing is to remove traditional hydrogenation reaction equipment mesohigh pump, a secondary diaphragm pump, a secondary hydride pumping unit and a process procedure, change original processing step, change the static pressure charging into by high pressure charging, reflux line and return tank recover hydrogen have been increased simultaneously, make material under normal pressure or low pressure situation, enter reactor, hydrogenation reaction takes place; Concrete processing step is as follows:

1, batching: with 5m ³Liquid glucose is squeezed into the liquid glucose measuring tank by the liquid glucose pump, with ready 0.5m ³The catalyst static pressure is put into the catalyst measuring tank; Then liquid glucose and catalyst are together put into head tank.

2, charging: open reactor emptying valve, reactor inlet valve successively, open the head tank bleeder valve that is positioned at second floor, charging in reactor; After charging finishes, off-response still emptying valve at first, off-response still inlet valve cuts out the head tank bleeder valve at last again.

3, hydrogenation: after charging finishes, open reactor and stir, open steam valve simultaneously, when treating that temperature in the kettle is raised to 90 ℃, open into hydrogen valve, prepare hydrogenation; When observing the reaction pressure curve and no longer change, close into hydrogen valve, prepare discharge.

4, discharge: after hydrogenation reaction finishes, open the reactor discharge valve, prepare discharge, after discharge finished, the reactor internal pressure was generally 2.0-3.0kPa, off-response still discharge valve.

5, hydrogen refluxes: at first open hydrogen backflow storage tank imported valve, open the reactor return valve again, all press to return tank from reactor, when question response still and hydrogen backflow pressure of storage tank maintain an equal level, off-response still return valve, hydrogen backflow storage tank imported valve successively.

6, catalyst treatment: after supernatant disposes in the settling tank, open the clear catalyst valve of settling tank, simultaneously with the catalyst in the purified water flushing settling tank, until catalyst being poured the catalyst measuring tank, and in the control catalyst measuring tank liquid volume at 0.5m ³

7, prepare hydrogenation reaction next time: after having checked feed liquid index and equipment situation, prepare hydrogenation reaction next time.

Adopting good effect of the present invention is that feed pressure is little, and potential safety hazard is little; Saved cost of equipment, the consumption of pump class, maintenance cost also reduce thereupon, and effect is very good, and most importantly considerable benefit has reduced the hydrogen loss, saves and reclaimed hydrogen.

The specific embodiment

The concrete implementing process step of technical solution of the present invention is as follows:

1, batching: with 5m ³Liquid glucose is squeezed into the liquid glucose measuring tank by the liquid glucose pump, with ready 0.5m ³The catalyst static pressure is put into the catalyst measuring tank; Then liquid glucose and catalyst are together put into head tank;

2, charging: open reactor emptying valve, reactor inlet valve successively, open the head tank bleeder valve that is positioned at second floor, charging in reactor; After charging finishes, off-response still emptying valve at first, off-response still inlet valve cuts out the head tank bleeder valve at last again;

3, hydrogenation: after charging finishes, open reactor and stir, open steam valve simultaneously, when treating that temperature in the kettle is raised to 90 ℃, open into hydrogen valve, prepare hydrogenation; When observing the reaction pressure curve and no longer change, close into hydrogen valve, prepare discharge;

4, discharge: after hydrogenation reaction finishes, open the reactor discharge valve, prepare discharge, after discharge finished, the reactor internal pressure was generally 2.0kPa, off-response still discharge valve;

5, hydrogen refluxes: at first open hydrogen backflow storage tank imported valve, open the reactor return valve again, all press to return tank from reactor, reactor and hydrogen backflow pressure of storage tank are 0.2kPa, successively off-response still return valve, hydrogen backflow storage tank imported valve

Claims

1. atmospheric charging technology of hydrogenation reactor, it is characterized in that removing high-pressure pump, a secondary diaphragm pump, a secondary hydride pumping unit, change original process procedure, change the static pressure charging into by high pressure charging, reflux line and return tank recover hydrogen have been increased simultaneously, make material under normal pressure or low pressure situation, enter reactor, hydrogenation reaction takes place; Concrete processing step is as follows:

(1) batching: with 5m ³Liquid glucose is squeezed into the liquid glucose measuring tank by the liquid glucose pump, with ready 0.5m ³The catalyst static pressure is put into the catalyst measuring tank; Then liquid glucose and catalyst are together put into head tank;

(2) charging: open reactor emptying valve, reactor inlet valve successively, open the head tank bleeder valve that is positioned at second floor, charging in reactor; After charging finishes, off-response still emptying valve at first, off-response still inlet valve cuts out the head tank bleeder valve at last again;

(3) hydrogenation: after charging finishes, open reactor and stir, open steam valve simultaneously, when treating that temperature in the kettle is raised to 90 ℃, open into hydrogen valve, prepare hydrogenation; When observing the reaction pressure curve and no longer change, close into hydrogen valve, prepare discharge;

(4) discharge: after hydrogenation reaction finishes, open the reactor discharge valve, prepare discharge, after discharge finished, the reactor internal pressure was generally 2.0-3.0kPa, off-response still discharge valve;

(5) hydrogen refluxes: at first open hydrogen backflow storage tank imported valve, open the reactor return valve again, all press to return tank from reactor, when question response still and hydrogen backflow pressure of storage tank maintain an equal level, off-response still return valve, hydrogen backflow storage tank imported valve successively;

(6) catalyst treatment: after supernatant disposes in the settling tank, open the clear catalyst valve of settling tank, simultaneously with the catalyst in the purified water flushing settling tank, until catalyst being poured the catalyst measuring tank, and in the control catalyst measuring tank liquid volume at 0.5m ³

(7) prepare hydrogenation reaction next time: after having checked feed liquid index and equipment situation, prepare hydrogenation reaction next time.