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Method for recovering phenol ammonia and additionally collecting and conveying heavy oil

A technology for recovery of phenolic ammonia and heavy oil, which is applied in separation methods, chemical instruments and methods, and the petroleum industry. It can solve the problems of wasting coal tar, heavy oil content, and difficulty in oil discharge, so as to extend the operating cycle and save cleaning costs. , to speed up the delivery effect

Pending Publication Date: 2022-07-22
陕西精益化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The raw material water for phenol ammonia recovery is complex, and the incoming water for raw coal pyrolysis and pretreatment contains a large amount of heavy oil. Due to the original design of the phenol ammonia recovery pretreatment system, the heavy oil in the raw material water tank degreasing facility is not designed to be discharged on site, resulting in It is difficult to discharge oil, and the untimely discharge of oil has caused huge pollution to the operation of the phenol ammonia recovery device system;
[0003] The original phenolic ammonia recovery equipment lacks the collection and transportation of heavy oil, so that the heavy oil enters the deacidification and deamination tower together with the liquid phase, and the high temperature in the deacidification and deamination tower makes a part of the heavy oil float and attach to the deacidification and deamination The top of the tower will also greatly reduce the efficiency of phenol ammonia recovery for the pipelines in the subsequent heat exchangers. The on-site oil discharge will easily cause environmental pollution. Recyclable coal tar is lost, so it is necessary to add heavy oil collection and transportation methods for phenol ammonia recovery

Method used

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  • Method for recovering phenol ammonia and additionally collecting and conveying heavy oil
  • Method for recovering phenol ammonia and additionally collecting and conveying heavy oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] like figure 1 As shown, the phenolic ammonia recovery proposed by the present invention adds a heavy oil collection and conveying device and method. During operation, the tank slag discharge port in the AC tank is connected to the heavy oil separation tank through piping, so that the oil in the AC tank is input to the heavy oil through piping. In the separation tank, after the heavy oil transportation is completed, the steam is purged into the piping to prevent the residual heavy oil in the piping from coking and causing the pipeline to be blocked;

[0026] The heavy oil entering the heavy oil separation tank starts to separate and settle automatically, and the heating pipe at the bottom of the heavy oil separation tank is started to heat the heavy oil separation tank, and the heating temperature of the heating pipe is controlled between 50-60 °C;

[0027] After gravity sedimentation, stratification begins, the heavy oil is in the lower layer, and the water phase is in ...

Embodiment 2

[0033] like figure 1 As shown, on the basis of Example 1, during operation, the tank slag discharge port in the AC tank is connected to the heavy oil separation tank through piping, so that the oil in the AC tank is input into the heavy oil separation tank through piping, and enters the heavy oil separation tank. The heavy oil in the separation tank begins to automatically separate and settle;

[0034] After gravity sedimentation, stratification begins, the heavy oil is in the lower layer, and the water phase is in the upper layer, and then the gear pump is started, and the heavy oil at the bottom of the gravity separation tank is transported to the medium-temperature coal tar pipeline through the gear pump, and the heavy oil is transported to the medium-temperature coal tar pipeline. It is transported and pumped to the coal tar tank farm for recycling;

[0035] The water phase in the upper layer of the gravity separation tank automatically flows into the phenol-containing wa...

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Abstract

The invention discloses a device and a method for additionally collecting and conveying heavy oil in phenol ammonia recovery, and relates to the field of phenol ammonia recovery, the technical scheme comprises the following steps: step 1, connecting a tank slag discharge port in an AC tank with a heavy oil separation tank through a piping, so that oil liquid in the AC tank is input into the heavy oil separation tank through the piping; 2, after heavy oil conveying is finished, steam is blown into the piping, and pipeline blockage caused by coking of residual heavy oil in the piping is prevented; 3, the heavy oil entering the heavy oil separation tank starts to be automatically separated and settled, and a heating calandria at the bottom of the heavy oil separation tank is started to heat the heavy oil separation tank; water is discharged to a phenol-containing waste liquid tank through a close-packed system, and heavy oil is conveyed to a coal tar tank area through an additionally arranged conveying pump to be recycled, so that the operation period of the device is prolonged, it is ensured that the indexes of diluted phenol water are qualified, stable operation is ensured, and emergency shutdown caused by blockage of a tower tray and a heat exchanger is avoided; and the heat exchanger cleaning cost is saved.

Description

technical field [0001] The invention relates to the technical field of phenolic ammonia recovery, in particular to a method for collecting and transporting heavy oil for phenolic ammonia recovery. Background technique [0002] The raw material water for phenolic ammonia recovery is complicated, and the raw coal pyrolysis and pretreatment raw water contains a large amount of heavy oil. Due to the original design of the phenolic ammonia recovery and pretreatment system, the heavy oil in the raw water tank-in-tank oil removal facility is not designed for local discharge, resulting in It is very difficult to discharge oil, and the untimely oil discharge will cause huge pollution to the operation of the phenolic ammonia recovery device system; [0003] The original phenolic ammonia recovery equipment lacks the collection and transportation of heavy oil, so that the heavy oil enters the deacidification and deamination tower together with the liquid phase. The top of the tower wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/025C10G33/00C07C39/00C07C37/68
CPCB01D17/0208C10G33/00C07C37/68C07C39/00
Inventor 薛海龙郭亚军张冰鲁腾肖俊宏
Owner 陕西精益化工有限公司