一种低温甲醇洗装置冷却系统
By adding valves and bypass pipelines to the cryogenic methanol washing unit, the system operation problem caused by leakage in the desorbed gas cryocooler was solved, the system stability and safety were improved, the equipment life was extended, and the energy utilization efficiency was increased.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 河南开祥精细化工有限公司
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-17
AI Technical Summary
Leakage in the cryogenic gas cooler of the low-temperature methanol washing unit led to the formation of ammonium bicarbonate crystals, affecting the normal operation of the system. This resulted in a decrease in the total sulfur absorption efficiency in the purified gas, forcing the system to operate at reduced load, which poses a safety hazard.
By adding valves and bypass pipelines to the inlet and outlet of the desorbed gas cryogenic cooler, rapid isolation of leaking desorbed gas cryogenic coolers can be achieved, and online maintenance can be carried out to avoid the impact of ammonium bicarbonate crystallization on subsequent pipelines. At the same time, the synergistic effect of multi-stage cryogenic coolers and ammonia compressors can be used to achieve efficient cooling and heat recovery.
This achieved stable system operation, avoided the impact of ammonium bicarbonate crystallization on the system, improved safety and equipment lifespan, reduced energy consumption, and improved energy utilization efficiency.
Smart Images
Figure CN224513444U_ABST
Abstract
Claims
1. A low temperature methanol wash unit cooling system characterized by: The system includes a cryogenic methanol washing unit, a desorbed gas cryostat, an acid gas cryostat, a methanol cryostat, a methanol-rich liquid cryostat, an ammonia compressor low-pressure cylinder, a first-stage ammonia compressor high-pressure cylinder, a second-stage ammonia compressor high-pressure cylinder, a first-stage separator, an ammonia heat exchanger, an ammonia heat exchanger, and an ammonia storage tank. The gas outlet of the cryogenic methanol washing unit is connected to the gas inlet of the desorbed gas cryostat, and the gas outlet of the desorbed gas cryostat is connected to the gas inlet of the cryogenic methanol washing unit. A valve is installed at the gas inlet of the desorbed gas cryostat, and a valve is installed at the gas outlet of the desorbed gas cryostat. A bypass pipeline connects the gas inlet and outlet of the desorbed gas cryostat, and a bypass valve is installed on the bypass pipeline. The ammonia outlet of the desorbed gas cryostat... The outlet is equipped with an outlet valve. The gaseous ammonia outlets of the desorbed gas cryostat, acid gas cryostat, methanol cryostat, and methanol-rich liquid cryostat are all connected to the gas inlet of the first-stage separator. The gas outlet of the first-stage separator is connected to the inlet of the low-pressure cylinder of the ammonia compressor. The outlet of the low-pressure cylinder of the ammonia compressor is connected to the inlet of the first stage of the high-pressure cylinder of the ammonia compressor. The outlet of the first stage of the high-pressure cylinder of the ammonia compressor is connected to the inlet of the first ammonia heat exchanger. The outlet of the first ammonia heat exchanger is connected to the inlet of the second stage of the high-pressure cylinder of the ammonia compressor. The outlet of the second stage of the high-pressure cylinder of the ammonia compressor is connected to the inlet of the second ammonia heat exchanger. The outlet of the second ammonia heat exchanger is connected to the inlet of the ammonia storage tank. The outlet of the ammonia storage tank is connected to the liquid ammonia inlet of the desorbed gas cryostat, acid gas cryostat, methanol cryostat, and methanol-rich liquid cryostat, respectively.
2. The rectisol plant cooling system of claim 1, wherein: It also includes a two-stage separator, through which gaseous ammonia from the low-pressure cylinder of the ammonia compressor enters the first stage of the high-pressure cylinder of the ammonia compressor.
3. The quenching system of the rectisol unit according to claim 1, characterized in that: Both the first-stage separator and the second-stage separator are gas impurity separators.
4. The quenching system of claim 1, wherein: The methanol-rich liquid cryostat is provided in two parts.