CN210953695U - Be used for desulfurization decarbonizer performance test system - Google Patents

Abstract

The utility model belongs to the technical field of gaseous purification and environmental protection, a be used for desulfurization decarbonizer capability test system is related to, this system of characterized by is arranged in testing desulfurization decarbonizer absorbed gas H₂S、CO₂COS, thiol, SO₂The test system comprises a gas distribution system, a tail gas collection system and a desulfurization and decarbonization agent test device. The utility model discloses it is simple to have the system composition, the test process does not have poisonous and harmful gas basically and discharges, need not to prepare a large amount of gases before the test, can furthest use non-acid component, especially when non-acid componentWhen being components such as methane, hydrogen, just can embody the utility model discloses test system's economic nature more when surveying the performance of desulfurization decarbonizer for a long time.

Description

Be used for desulfurization decarbonizer performance test system

Technical Field

The utility model belongs to the technical field of gaseous purification and environmental protection, concretely relates to be arranged in testing desulfurization decarbonizer absorbed gas H₂S、CO₂COS, thiol, SO₂And the performance of the acid gas components is tested.

Background

There are many industrial occasions where it is necessary to remove H from mixed gas₂S、CO₂COS, thiol, SO₂And acidic components such as natural gas, refinery gas, synthetic ammonia, hydrogen production, flue gas, etc.

Absorption is the main process for the removal and purification of these acidic components. Whether the acid component is absorbed chemically or physically or chemically and physically, the acid component is absorbed by the desulfurizing and decarbonizing agent in principle, then the desulfurizing and decarbonizing agent is depressurized, heated, stripped and regenerated, returned to the absorption equipment for recycling, and the absorbed acid component is sent to a downstream process or discharged.

In order to research and develop new solvents, change new solvents due to the change of working conditions of production devices, re-evaluate the old desulfurization and decarburization agents after being polluted and treated, and the like, the detailed knowledge of the new solvents, the new working conditions and the absorption performance of the polluted solution after being purified and treated is required, and the test on a small-sized or simulation test device is the most direct and effective means. Due to H₂S, COS thiol, SO₂And the like belong to toxic and harmful malodorous gases, which can cause people to feel uncomfortable and poisoned under the condition of polar concentration, and the waste gas containing the toxic and harmful malodorous gases is directly discharged to the atmosphere in the test process, so that the surrounding environment is polluted, and the health of testers is influenced. Meanwhile, the test scale is slightly large, and the test time is long, the more waste gas needs to be discharged, and the surrounding people can object to the waste gas to the greatest extent; meanwhile, the amount of prepared raw material gas is large, so that the raw material gas is not convenient to store and needs more funds to purchase the raw material gas.

Traditional laboratory researchThe test device of the sulfur decarbonizer is directly discharged or absorbed by strong alkaline substances such as sodium hydroxide, and the test device of a few liters of gas per hour has limited influence range and degree or needs less alkali amount and generated waste. However, in order to make the obtained data more effective and have practical guiding significance, the air quantity of the test device is 1Nm³More than H, longer test time, in this case H₂S, COS thiol, SO₂And the waste gas containing toxic and harmful components cannot be directly discharged or absorbed by alkali.

Therefore, it is desirable to design a testing system that reduces the emission of toxic and harmful gases and is economically acceptable.

Disclosure of Invention

The utility model aims at providing a be arranged in testing desulfurization decarbonizer absorbed gas H₂S、CO₂COS, thiol, SO₂The performance of the acid gas components is tested by the test system, and H is reduced or even avoided in the test process₂S, COS thiol, SO₂When toxic and harmful gas enters atmosphere and H is absorbed by strong alkali₂S, thiol, SO₂And the like.

The utility model discloses a main technical scheme: the performance test system of the desulfurization and decarbonization agent is characterized in that the system is used for testing H in the desulfurization and decarbonization agent absorption gas₂S、CO₂COS, thiol, SO₂The test system comprises a gas distribution system, a tail gas collection system and a desulfurization and decarbonization agent test device.

Generally, the gas distribution system comprises a device for preparing raw gas, adjusting the composition of tail gas recovered by the tail gas collection system to the composition of the raw gas and outputting the raw gas with pressure and flow required by the desulfurization and decarbonization agent testing device.

The tail gas collecting system comprises a device for collecting and drying the purified gas and the regeneration gas of the desulfurization and decarbonization agent.

The desulfurization and decarburization agent test device comprises various specific desulfurization and decarburization test devices based on an absorption principle, and a desulfurization and decarburization device selected from MDEA and various amine type formula solvents and polyethylene glycol dimethyl ether physical absorbents.

The test flow of the test system is 0.5 Nm³Over h and pressure from normal pressure to 10 MPa.

Further, the gas distribution system comprises a series of gas distribution tanks, a compressor, a pressure stabilizer, pipelines and pipe fittings; the pressure and the volume of the gas distribution tank are determined according to the flow of the desulfurization and decarbonization agent test system, and the gas storage amount of the gas distribution tank meets the requirement of the normal operation of the test device for 12-24 hours.

The equipment of the test system meets the following conditions: the method comprises the steps of firstly using prepared gas in an initial gas distribution tank when a test is started, using purified gas and regenerated gas recovered from a tail gas collection system as raw material gas to be prepared in an empty gas distribution tank on line after the pressure and the flow of a device are stable, and supplementing lost acid components through another small-gas-quantity compressor or an injection pump according to analysis results of the purified gas and the regenerated gas.

The utility model discloses test system, test when beginning from distribution system's a distribution jar output feed gas to testing arrangement of having prepared the feed gas, most or even whole acid component in the feed gas is absorbed when testing arrangement, and it also is absorbed to have some non-acid component certainly, and the gas that finally does not absorb becomes the purified gas, can release most and become the regeneration gas after regeneration by the absorptive gas of desulfurization decarbonizer. Purified gas and regenerated gas are input into a tail gas collecting system, and respectively enter respective gas storage tanks after being dried. After the pressure and the flow of the device to be tested are stable, purified gas and regenerated gas collected by the tail gas collecting system are used as gas distribution raw materials, the purified gas and the regenerated gas are metered and then enter another vacant gas distribution tank of the gas distribution system to be distributed with raw gas on line, and lost acid components are replenished according to the analysis results of the purified gas and the regenerated gas. The lost acid components are mainly that the acid components can not be completely regenerated after being absorbed by the desulfurization and decarbonization agent at the beginning of the test, so that some residual acid components are left in the desulfurization and decarbonization agent; in addition, some of the acidic components react with the decarburising and desulphurizing agent to form other compounds which cannot be released again during the regeneration process by reversible absorption reactions.

The utility model provides a test system of desulfurization decarbonizer has that the system composition is simple, the test process does not have poisonous and harmful gas basically and discharges, need not to prepare a large amount of gases before the test, can furthest use non-acid component, especially when non-acid component is components such as methane, hydrogen, just can embody the economic nature of this invention test system more when surveying the performance of desulfurization decarbonizer for a long time.

Drawings

FIG. 1 is a schematic view of the connection structure of a system for testing the performance of a desulfurization and decarbonization agent according to an embodiment of the present invention.

The embodiments described in the present invention are not limited to the embodiments shown in fig. 1.

In fig. 1, 1 to 9 constitute a gas distribution system, 10 is a desulfurization and decarbonization agent testing device, and 11 to 14 are tail gas collection systems.

1 raw material gas jar, 2 raw material gas on-line preparation jars, 3 feed gas compressors, 4 desulfurization decarbonizer feeding gas buffer tanks, 5 voltage regulator, 6 acid component compressors, 7 acid component supplyes jar, 8 regeneration gas compressors, 9 purification gas compressors, 11 purification gas drying tower, 12 regeneration gas drying tower, 13 purification gas storage tanks, 14 regeneration gas storage tanks.

Detailed Description

The present invention will be described in detail with reference to the following embodiments and fig. 1.

Examples

The examples were used for various absorption tests such as the amine method, dimethyl ether of polyethylene glycol, and the like.

As shown in the attached figure 1, the desulfurization and decarbonization agent performance testing system mainly comprises a gas distribution system, a tail gas collecting system and a desulfurization and decarbonization agent testing device.

The equipment of the gas distribution system meets the following requirements: preparing raw material gas, adjusting the composition of the tail gas recovered by the tail gas collecting system to the composition of the raw material gas and outputting the raw material gas with pressure and flow required by the desulfurization and decarbonization agent testing system.

The tail gas collecting system has the following equipment requirements: collecting the purified gas and the regenerated gas of the desulfurization and decarbonization agent and drying.

The desulfurization and decarbonization agent testing device is based on various specific desulfurization and decarbonization of the absorption principleCarbon test device, including but not limited to MDEA and various amine type formula solvent, desulfurization decarbonization device of physical absorbent such as polyethylene glycol dimethyl ether, test flow 0.5 Nm³Over h and pressure from normal pressure to 10 MPa.

As shown in figure 1. Before testing the desulfurization and decarbonization agent, acidic components are injected into the raw material gas tank 1 through the acidic component compressor 6 or directly, non-acidic components are injected into the raw material gas tank 1 through the compressor or directly, and raw material gas with enough flow for running for 12-24 hours or more is prepared for the desulfurization and decarbonization agent testing device 10.

When the desulfurization and decarburization test device 10 initially operates, raw gas enters from the raw gas tank 1 through the raw gas compressor 3 or directly, and purified gas of the desulfurization and decarburization test device 10 enters into the purified gas storage tank 13 after being dehydrated through the purified gas drying tower 11; the regeneration gas of the desulfurization and decarburization agent testing device 10 enters a regeneration gas storage tank 14 through a regeneration gas drying tower 12 to wait for standby.

When the pressure and the flow of the desulfurization and decarbonization agent testing device 10 are stable, the gas compositions of the purified gas storage tank 13 and the regenerated gas storage tank 14 are analyzed, the main acid component content is ensured as the reference of the composition of the raw material gas, and the raw material gas is prepared on line after the amounts of the purified gas and the regenerated gas are measured. And after analysis and calculation, the lost acidic component is supplemented to the acidic component supplementing tank 7, and is dispersed and brought into the raw material gas online preparation tank 2 by using purified gas, and when the pressure in the raw material gas online preparation tank 2 exceeds the inlet pressure of the raw material gas compressor 3 by more than 20%, the raw material gas is switched from the raw material gas tank 1 to the raw material gas online preparation tank 2. The device can be operated for a long time only by supplementing or even not supplementing acid components, the consumption of various gases for preparing the feed gas is low, and toxic and harmful acid components are not discharged in the test process.

Therefore, the testing process of the desulfurization and decarbonization agent is environment-friendly and economical.

Claims (2)

1. A performance test system for desulfurization and decarbonization agents is characterized in that the system is used for testing H in desulfurization and decarbonization agent absorption gas₂S、CO₂COS, thiol, SO₂The test system comprises a gas distribution system,The system comprises a tail gas collecting system and a desulfurization and decarbonization agent testing device; the equipment of the test system satisfies: the method comprises the following steps that prepared gas in an initial gas distribution tank is used at the beginning of testing, purified gas and regenerated gas recovered from a tail gas collection system are used as raw material gas after the pressure and the flow of a device are stable to be prepared in an empty gas distribution tank on line, and lost acid components are supplemented through another small-gas-quantity compressor or an injection pump according to the analysis results of the purified gas and the regenerated gas;

the gas distribution system comprises equipment for preparing raw material gas, adjusting the composition of tail gas recovered by the tail gas collection system to the composition of the raw material gas and outputting the raw material gas with pressure and flow required by the desulfurization and decarbonization agent testing device, and the equipment comprises a series of gas distribution tanks, a compressor, a pressure stabilizing device, a pipeline and pipe fittings; the pressure and the volume of the gas distribution tank are determined according to the flow of the desulfurization and decarbonization agent test system, and the gas storage amount of the gas distribution tank meets the requirement that the test device normally operates for 12-24 hours;

the tail gas collecting system comprises equipment for collecting and drying purified gas and regenerated gas of the desulfurization and decarbonization agent;

the desulfurization and decarburization agent test device comprises various specific desulfurization and decarburization test devices based on an absorption principle, and a desulfurization and decarburization device selected from MDEA and various amine type formula solvents and polyethylene glycol dimethyl ether physical absorbents.

2. Test system according to claim 1, characterized in that the test flow is 0.5 Nm³Over h and pressure from normal pressure to 10 MPa.

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