阅读说明：本技术 一种节省渣油加氢开工时间的升温方法 (A kind of temperature-rising method for saving residual hydrogenation on-stream time ) 是由 崔钟续 何可禹 刘云秀 仵栓强 应汶静 冯文欣 于 2019-09-30 设计创作，主要内容包括：本发明公开了一种节省渣油加氢开工的升温方法,具体为：在反应器外壁增加温控电加热带,并将温控电加热带的升温速度设定为10℃/h,并设定最高温度为100℃,待循环气通过加热炉加热至160℃后进入反应器加热催化剂时,将温控电加热带的温度设定为51℃,待反应器外壁温度恒温至51℃后又继续上升,超过51℃时,即说明热量已由反应器内壁传到外壁,达到了反应器升压条件。本发明的方法可大大缩减开工时间,延长反应器使用寿命,提高能量使用效率,更加的节能环保。(The invention discloses a kind of temperature-rising methods that saving residual hydrogenation goes into operation, specifically: increase temperature control heat tape in reactor outer wall, and the heating rate of temperature control heat tape is set as 10 DEG C/h, and maximum temperature is set as 100 DEG C, when gas to be recycled enters reactor heatable catalyst after being heated to 160 DEG C by heating furnace, the temperature of temperature control heat tape is set as 51 DEG C, after reactor outside wall temperature constant temperature to continuing to rise again after 51 DEG C, when more than 51 DEG C, illustrate that heat passes to outer wall by reactor wall, has reached reactor boosting condition.Method of the invention can reduce significantly on-stream time, extend reactor service life, improve energy ecology, more energy conservation and environmental protection.)

1. a kind of temperature-rising method for saving residual hydrogenation on-stream time, it is characterised in that: the following steps are included: in reactor outer wall Increase temperature control heat tape, and the heating rate of temperature control heat tape is set as 10 DEG C/h, and set maximum temperature as 100 DEG C, when gas to be recycled enters reactor heatable catalyst after being heated to 160 DEG C by heating furnace, by the temperature of temperature control heat tape It is set as 51 DEG C, after reactor outside wall temperature constant temperature to continuing to rise again after 51 DEG C, when more than 51 DEG C, that is, illustrates heat by anti- It answers device inner wall to pass to outer wall, has reached reactor boosting condition.

2. the temperature-rising method according to claim 1 for saving residual hydrogenation on-stream time, it is characterised in that: the reactor Outer wall uniform winding temperature control heat tape is spaced 200mm between adjacent heating tape, then increases the guarantor of 100mm thickness in outer wall Wen Mian, then add the aluminium plating zinc plate to shield.

3. the temperature-rising method according to claim 1 for saving residual hydrogenation on-stream time, it is characterised in that: the reactor Outer wall be evenly arranged with it is several for monitoring the thermocouples of temperature of reactor.

Technical field

The invention belongs to Residue Hydrotreating Technology technical fields, and in particular to a kind of heating for saving residual hydrogenation on-stream time Method.

Background technique

Residue Hydrotreating Technology need to stop work change that agent is primary, and residual hydrogenation start-up process has every year since catalyst life limits One important procedure is reactor and hot high score is warming up to that MPT(is minimum to allow temperature of boosting) temperature could boost, mainly for Reactor brittle fracture is prevented, current normal heating procedure are as follows: circulating air is heated to 160 DEG C (constant temperature) in reacting furnace, circulation Gas enters reactor heatable catalyst, and catalyst gradually transmits heat to wall of reactor (wall thickness 312mm), is passed to by inner wall outer Wall starts to carry out subsequent start-up process after final all outside wall temperatures all reach 51 DEG C；Since wall of reactor is thicker, reaction Only catalyst transmitting heat heats device, and reactor rises to requires temperature to generally require 3-5 days, greatly extends when going into operation Between, and work as 160 DEG C of reactor wall temperature, and 30-60 DEG C of wall temperature outside, the temperature difference are larger, are influenced in reactor by thermal expansion Side expansion can generate larger stress, influence reactor service life, and on the other hand, conventional reactor only has two groups of (thermoelectricity up and down Even title is multipoint flexible thermocouple, one group four, is distributed on the same horizontal plane) thermocouple, middle section is temperature prison Blind area is controlled, can not find catalyst coking problem in time.

Summary of the invention

It is an object of the invention to long for the current residual oil start-up process time, start-up process reactor wall is by thermal stress The problems such as big, provides a kind of temperature-rising method for saving residual hydrogenation on-stream time, can reduce significantly on-stream time, extends reaction Device service life improves energy ecology, more energy conservation and environmental protection.

To achieve the above object, the present invention adopts the following technical scheme:

A kind of temperature-rising method for saving residual hydrogenation on-stream time, comprising the following steps: increase temperature control electricity in reactor outer wall and add The torrid zone, and the heating rate of temperature control heat tape is set as 10 DEG C/h, and set maximum temperature as 100 DEG C, gas to be recycled is logical It crosses after heating furnace heat cycles are gradually warming up to 160 DEG C, the temperature of temperature control heat tape is set as 51 DEG C, to reactor outer wall When temperature is more than 51 DEG C, that is, illustrates that heat passes to outer wall by reactor wall, reached reactor boosting condition, then proceeded to Boosting-oil inlet-catalyst vulcanization-normally produces, and temperature control heat tape powers off during normal production run, does not need to come into operation.

Further, the reactor outer wall uniform winding temperature control heat tape is spaced 200mm between adjacent heating tape, Then increase the heat-preservation cotton of 100mm thickness in outer wall, then add the aluminium plating zinc plate to shield；Temperature control heat tape it is controllable Temperature range is 25-650 DEG C.

Further, former reactor inside and outside wall have respectively two groups (thermocouple title is multipoint flexible thermocouple, one group four It is a, be distributed on the same horizontal plane) thermocouple, inner wall thermocouple is for monitoring reaction bed temperature, and outer wall is for monitoring Wall Temperature, initial design are typically in cost consideration, and inside and outside wall only designs two groups of thermocouples, but sends out in actual use Existing, inside reactor non-uniform temperature has hot-spot coking phenomenon, needs to carry out monitoring temperature, to prevent ahead of time.And such as Fruit is want then to need the aperture on reactor, scene cannot achieve in reactor wall increase thermocouple.So in reactor outer wall Increase several thermocouples, one group of thermocouple be respectively only originally set in reactor bottom and top, new departure original two groups it Between increase by three groups, every layer according to 0 °, 90 °, 180 °, 360 ° of settings.Wall Temperature can be monitored well in this way, hot spot can be first anti- Should find in time on Wall Temperature, adjust in time, can also discovery catalyst coking earlier, agglomeration problems, can effectively keep away The occurrence of exempting from the unplanned shutdowns such as bed temperature runaway.

Normal residual hydrogenation goes into operation comprising five reactors, the equal the method according to the invention of 5 reactors can be carried out. After the last one container reaches minimum pressurization temperature, residual hydrogenation goes into operation can then carry out to next step.

The method of the present invention compared with the prior art, has the advantages that

(1) present invention is realized in residual hydrogenation start-up process in reactor by increasing temperature control heat tape in reactor outer wall Wall and outer wall Synchronous Heating can quickly make reactor outer wall reach 51 DEG C or more, reach boosting condition, by initial 3-5 days It can be reduced to 1 day, be significantly reduced on-stream time；On the other hand, it is gradually heated up by temperature control heat tape to reactor outer wall, Wall of reactor internal-external temperature difference can be controlled within 50 DEG C, can improve and be produced in reactor heating process due to excessive temperature differentials Raw stress extends reactor service life；On the other hand, the present invention realizes the method for external heat in thick-wall reactor not simultaneously Residual hydrogenation working process can be only applied to, can also be applied to inside and outside other needs while in the technique of heating.

(2) energy consumption is reduced；Gas has to pass through aerial cooler, down cycles into process below in circulating air process It is heated afterwards by stove, former whole process needs to continue 3-5 days, and energy consumption is larger, and the circulating air Repeat-heating time now It foreshortens to 1 day, significantly reduces energy consumption.

(3) reactor outer wall reasonable layout thermocouple, can monitor Wall Temperature well, and hot spot can first be reacted in wall In temperature, find, adjust in time in time, can also discovery catalyst coking earlier, agglomeration problems, can effectively avoid bed and fly The occurrence of unplanned shutdowns such as temperature.

Detailed description of the invention

Fig. 1 is that the residual hydrogenation of embodiment 1 goes into operation equipment structure chart；

Fig. 2 is the structure of reactor schematic diagram of embodiment 1；

In figure: 1- reactor shell, 2- temperature control heating band, 3- heat-preservation cotton, 4- aluminize photo zincography, 5- thermocouple.

Specific embodiment

The present invention will be further described below by way of examples, but these embodiments are not to the scope of the present invention It is limited.