Method for recovering catalytic reaction oil and gas heat energy and cooling

A technology for reacting oil and gas, oil and gas cooler, applied in non-catalytic thermal cracking, cracking, fluidized bed furnace, etc., can solve the problems of high temperature, complex process, low efficiency of heat energy recovery of high temperature oil and gas, etc.

CN1189539CInactive Publication Date: 2005-02-16SINOPEC ENG
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2005-02-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

A process for cooling the oil vapour at 580-670 deg.c during catalytic cracking reaction and recovering its heat energy is characterized by use of an oil vapour cooler arranged on the top of reaction settling unit. Said cooler contains multiple layers of shaped baffle and the cooling liquid medium and counter-flow high-temp oil vapour for direct contact. Its advantage is high heat exchange efficiency.
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Description

technical field

[0001] The invention belongs to the heat energy recovery and cooling method of catalytic reaction oil gas, more specifically, it is a heat energy recovery and rapid cooling method for catalytic thermal cracking and similar process reaction oil gas. Background technique

[0002] The reaction oil gas of the conventional heavy oil catalytic cracking process does not need to be cooled, and directly enters the fractionation tower, and the heat of the oil gas is taken away by the oil slurry circulation of the fractionation tower. The reaction oil gas system has no heat energy recovery and cooling measures, and its oil gas pipeline and fractionation tower can be used Carbon steel material. Different from the conventional heavy oil catalytic cracking process, catalytic thermal cracking is a process for producing ethylene and propylene products from heavy oil, and its reaction temperature is as high as 580-670°C, which is 100-150°C higher than the conventional catalyt...

Examples

Embodiment

[0012] This technical solution was applied to the 55,000 tons / year catalytic pyrolysis industrial test device. The test was run for two and a half months. 640°C, the oil-gas temperature after being cooled by the oil-gas cooler is shown in Table 1.

[0013] project

First group

Second Group

The third group

Fourth group

Riser outlet temperature, ℃

644

610

611

602

Settler dilute phase temperature, ℃

618

578

582

580

Cooler upper temperature, ℃

245

237

230

228

Cooler middle temperature, ℃

251

233

231

266

Lower temperature of cooler, ℃

295

302

296

321

Cooler outlet oil gas temperature, ℃

276

277

274

313

Cooler differential pressure, kPa

14.3

15.5

16.5

11.9

Fractionation ...