RU2255793C1 - Plant for trapping hydrocarbons from coking reactors - Google Patents

Abstract

FIELD: oil production; trapping hydrocarbons in slow coking plants.

SUBSTANCE: proposed plant includes reservoir for receiving the products heating the coking reactors with piping system equipped with pumps discharging non-conditioned oil products and pipe lines discharging gas for rectification or sprinkling into scrubber for steaming and cooling the coke at discharge of gas into atmosphere and drainage of water condensate into disposal system through hydraulic seal; hydraulic seal is connected via vibrating sieve with near-reactor coke accumulator combined with gravity filter; above-sieve part of vibrating sieve is connected with near-reactor coke accumulator and under-sieve part is connected via gravity filter with deepened circulating water reservoir or with disposal system. Proposed plant makes it possible to return some components of water condensate and cool coke at simultaneous discharge of them to disposal system.

EFFECT: improved quality of separation of steaming products.

3 cl, 1 dwg

Description

The invention relates to the refining industry, in particular to equipment for a condensation and separation system for gaseous and liquid coking products.

A known installation for the capture of hydrocarbons from coking reactors containing a scrubber connected by a piping system to supply irrigation water, products formed during heating, steaming and cooling of coke with a gas outlet to the atmosphere and condensate drain into the sewer. (Valyavin G.G., Vetoshkin N.I., Musin I.G. Analysis of the schemes for capturing products released during heating of the chambers, steaming and cooling of coke, and development of measures to reduce emissions into the environment of Novo-Ufimsky Oil Refinery OJSC). Oil refining and petrochemistry, 1998, No. 9, p. 72).

The disadvantage of this installation is a significant discharge of liquid petroleum products and coke particles into the sewer.

The closest in technical essence and the achieved result to the claimed object is a hydrocarbon recovery unit from coking reactors, containing a receiving tank for the heating products of the reactors and a scrubber for receiving steaming and cooling coke, connected by a piping system with irrigation water, heating products, steaming and cooling of coke pumping the heating oil pump, venting gas to the atmosphere and draining the condensate into the sewer. (Valyavin G.G., Sedov P.S., Soloviev A.M., Onegova A.Kh. Reducing oil product losses

and reduction of environmental pollution in delayed coking plants. M .: TsNIITEneftekhim, 1982, p.14-15).

The disadvantage of this installation is also a significant discharge of liquid petroleum products and coke particles into the sewer, which leads to unsatisfactory operation of its pipeline system and loss of components of the water condensate of the steaming and cooling products of coke.

The objective of the present invention is to return part of the components of the water condensate of the steaming and cooling products of coke to the own needs of the delayed coking unit while reducing their discharge into the sewer.

The technical result in this case is an increase in the quality of separation of steaming products and coke cooling.

The specified technical result is achieved by the fact that in the installation for hydrocarbon recovery from coking reactors, which includes a receiving tank for the products of heating of coking reactors with a piping system equipped with pumps for pumping substandard oil products and pipelines for withdrawing gas for distillation or for irrigation with water into a scrubber for steaming and cooling coke with gas outlet through the pipeline into the atmosphere and drainage of water condensate through a hydraulic lock into the sewer, the latter through a sieve dinene with a coke pre-reactor accumulator combined with a filter settler, while the over-sieve part is connected to a coke pre-reactor accumulator, and an under-sieve is connected through a filter settler with a recessed coke hydraulic cutting water recycling tank or a sewer drain.

It is advisable to connect the under-sieve part of the vibrating sieve with a pipeline system to pumps through a shelf sump with sewage, with pipelines of substandard oil products, irrigation and hydraulic cutting water pipelines, and a coke storage reactor combined with a filter sump.

In addition, it is advisable to connect a recessed reservoir of hydraulic cutting water with a shelf sump.

The attached drawing shows the proposed installation for the capture of hydrocarbons from coking reactors.

The hydrocarbon recovery unit from coking reactors contains a tank 1 for receiving the reactor heating products, connected through a pump 2 to a pipeline (pipelines are not indicated in the drawing) of a substandard oil product of a delayed coking unit, a scrubber 3 for receiving steaming and cooling coke vapor with a hydraulic shutter 4 connected through a vibrating sieve 5 with a coke b pre-storage tank combined with a filter sump 7. The over-sieve part of the vibrating sieve 5 is connected to a pre-storage tank oxa 6 and sieve - through the filter sump 7 and 8 with a recessed sump tank 9, recycled water waterjet, or through a pump 10 with a sump 11 shelving or sewerage. The recessed reservoir 9 is connected by a pump 12 to a shelf sump 11. The shelf sump 11 is connected via pumps 13, 14, 15 to a coke storage tank 6 respectively, substandard oil product pipelines, and hydraulic cutting or irrigation water. To regulate the liquid level in the shelf sump 11 during its gravity discharge into the sewer, a hydraulic shutter 16 is installed.

The proposed installation for the capture of hydrocarbons from coking reactors works as follows.

Pairs of steaming and cooling of coke from coking reactors enter the scrubber 3, while irrigation water is also supplied there. The resulting gas is released into the atmosphere, and the condensate flows by gravity through a hydraulic shutter 4 to a vibrating sieve 5. On the vibrating sieve 5, the condensate of the steaming products is separated into coke breeze (overhead part), which is transferred to the after-storage coke storage unit 6, from where it is shipped to the commercial product and water condensate (sublattice part), which enters through a filter sump 7 into a recessed reservoir 9 of hydraulic cutting water or into the sewer. In the filter sump 7, the water condensate passing through the stationary filtering layers of coke is cleaned of coke fines and oil products residues and, together with the hydraulic cutting water, is fed through the pit 8 to the buried hydraulic cutting water tank 9. The bottom of the scrubber 3 is cleaned of water condensate from the products of steaming and cooling of the coke by pump 10 to the vibrating sieve 5.

It is advisable to return the oil phase from the steam condensate of the steaming products, send the under-sieve product from the vibrating sieve 5 through the pump 10 to the shelf sump 11. The oil product phase from the shelf sump 11 is pumped out 14 to the substandard oil product of the delayed coking unit, the purified water is fed by pumps 15 as feed to piping for irrigation or hydraulic cutting of coke, and the coke suspension by pump 13 is periodically discharged into the after-reactor coke storage 6, combined with a filter filter by a stand 7. 7. During the gravity operation of the shelf sump 11, the purified water through the hydraulic lock 16 is discharged into the sewer.

It is advisable to connect the buried tank 9 through the pump 12 with the shelf sump 11 for the post-treatment of the hydraulic cutting water from the coke suspension.

Thus, the proposed design of the installation for the capture of hydrocarbons from coking reactors will allow to isolate and use the individual components of the coke steaming and cooling products for the own needs of the delayed coking unit and, as a result, reduce their discharge into the sewers.

Claims (3)

1. Installation for hydrocarbon recovery from coking reactors, including a tank for receiving products of heating of coking reactors with a pipeline system equipped with pumps for pumping substandard oil products and a gas outlet pipe for distillation or for irrigation with water into a scrubber for steaming and cooling coke with gas outlet through the pipeline to the atmosphere and draining the water condensate through a hydraulic shutter into the sewer, characterized in that the hydraulic shutter is connected through a vibrating sieve to the reactor coke accumulator combined with a settling filter, while the over-sieve part of the vibrating sieve is connected to the coke pre-reactor accumulator, and the under-sieve through a settling filter is connected to a buried coke hydraulic cutting water recycling tank or sewer. 2. Installation for hydrocarbon recovery from coking reactors according to claim 1, characterized in that the under-sieve part of the vibrating sieve is connected by a pipeline system to pumps through a shelf sump with sewage, with pipelines of substandard oil products, irrigation and hydraulic cutting water circulating and a coke storage reactor combined with a filter sump. 3. Installation for the capture of hydrocarbons from coking reactors according to claim 1, characterized in that the recessed reservoir of circulating water of the hydraulic cutting is connected to the shelf sump.