Desulfurization iron agent regeneration and separation unit

By combining a high-temperature reaction tank with a vacuum rotary drum, and utilizing chemical reactions in an acidic or oxidizing environment, the problem of corrosion and large footprint of sulfide treatment equipment in oil and gas field produced water has been solved, achieving efficient regeneration and resource recovery of iron sulfide sludge.

CN224619819UActive Publication Date: 2026-08-11SINOPEC OILFIELD SERVICE CORPORATION +1
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Patent Information

Application Number
CN202521979779.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-09-15
Publication Date
2026-08-11
Estimated Expiration
2035-09-15

AI Technical Summary

Technical Problem

Existing technologies for treating sulfides in produced water from oil and gas fields suffer from problems such as severe equipment corrosion, high costs, and large equipment footprint. In particular, at high sulfur content, large amounts of precipitant are used and regeneration efficiency is low.

Method used

The device combines a high-temperature reaction tank and a vacuum rotary drum. Through chemical reactions in an acidic or oxidizing environment, hydrochloric acid or sodium hypochlorite reacts with iron sulfide sludge. Combined with a membrane network structure and a vacuum pump, gas, liquid, and solid three-phase separation is achieved, realizing efficient regeneration and separation.

Benefits of technology

It significantly improves processing efficiency, shortens separation time, reduces equipment footprint, and achieves efficient regeneration and resource recovery of iron sulfide sludge, thereby reducing operating costs.

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Abstract

This utility model discloses a device for regenerating and separating iron sulfide sludge. A first inlet for conveying iron sulfide sludge and a second inlet for conveying the reagent are provided on a high-temperature reaction tank. A temperature control unit is installed inside the high-temperature reaction tank to regulate the temperature. A membrane mesh structure driven by a motor and rotating at a certain speed is installed inside a vacuum drum, dividing the vacuum drum into an inner cavity and an outer cavity. The high-temperature reaction tank is connected to the inner cavity via pipelines. A solid separation system is connected to the inner cavity of the vacuum drum; a liquid separation system is connected to the outer cavity of the vacuum drum and is located below the liquid level in the vacuum drum; and a gas separation system is connected to the top of the vacuum drum. This device efficiently treats iron sulfide sludge in acidic or oxidizing environments and is suitable for the reaction of iron sulfide with hydrochloric acid or sodium hypochlorite. By optimizing the reaction process and separation system, the treatment efficiency is improved and the equipment footprint is reduced.
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