Natural gas sewage slurry combustion gas drying device and method thereof

Abstract

The invention discloses a natural gas sewage slurry combustion gas drying device and a method thereof. The device comprises a slurry groove, a spray-fluidized bed drying device and a cyclone separator; the slurry groove is used for storing the slurry; the spray-fluidized bed drying device is used for performing slurry spray drying and fluidized bed drying; and the cyclone separator is used for performing gas-solid separation on steam, flue gas and a dried solid mineralizer. The natural gas sewage slurry combustion gas drying device has the low pressure spray drying function, and has the fluidized bed drying function, the single bench equipment quantity is small, the equipment arrangement is compact, and multiple functions of the single bench equipment is realized.

Description

technical field [0001] The invention relates to the field of sewage slurry drying, in particular to a gas drying device and method for natural gas sewage slurry. Background technique [0002] In the natural gas exploitation process of PetroChina and Sinopec, there is bound to be a certain amount of sewage containing minerals. However, due to environmental protection requirements, the sewage must be treated before being discharged up to the standard or reinjected without treatment. [0003] In the prior art, no matter whether it is discharged up to standard after treatment or reinjected without treatment, the sewage must be transported to the concentration point by car tanker or transported to the concentration point by pipeline. The transportation distance depends on the distance from the natural gas well station to the concentration point. The distance to the point of concentration and the cost of both transport and pipeline are high. [0004] At the same time, in the natu...

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Problems solved by technology

[0003] In the prior art, no matter whether it is discharged up to standard after treatment or reinjected without treatment, the sewage must be transported to the concentration point by car tanker or transported to the concentration point by pipeline. The transportation distance depends on the distance from the natural gas well station to the concentration point. The distance to the point of concentration, the high cost of both transport and pipeline

[0004] At the same time, in the natural gas sewage treatment project in the prior art, the technological process of pretreatment→RO membrane concentration→evaporative concentration→centrifugal separation→fluidized bed drying is adopted. In the traditional drying process, after the concentrated liquid is centrifuged, Using a fluidized bed to dry the mud requires high power consumption and cannot make full use of existing resources. Moreover, the sewage treatment device has a large capacity and occupies a large area, which is not suitable for sewage treatment of small natural gas well stations.

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