Chemical-electric poly-generation method and equipment

Abstract

The invention discloses a synthetic gas gasified by carbon-contained raw materials through gasifying agents such as water, oxygen, carbon dioxide and the like. The synthetic gas is chemically synthesized to obtain a chemical product; the synthetic gas not synthesized is used as fuel to be transmitted to an IGCC fuel gas / steam combined circulating generating system; and the synthetic gas is also transmitted into the steam for generating power in gasification, purification and chemical synthesis by the steam produced by reaction heat. The invention obviously enhances the energy utilization rate,increases the productivity, reduces investment and cost and obviously enhances the economic benefit.

Description

technical field

[0001] The invention relates to a method and equipment for a chemical and electric polygeneration system for producing synthetic gas from coal, natural gas, etc., and belongs to the technical fields of energy power and chemical engineering. Background technique

[0002] Due to the need for increased production capacity, as well as the benefits of investment and cost reduction, modern methanol, dimethyl ether and synthetic oil plants are accelerating towards large-scale development. Due to the limitations of equipment size and transportation, the current large-scale scheme at home and abroad is to use multiple One synthesis tower or multiple sets of synthesis devices are produced in parallel. This method has the disadvantages of large equipment, large area occupation, and complicated process; the second solution is to reduce the circulation ratio or pass through one time without circulation, and the multi-tower series synthesis and cooling are carried out alter...

Examples

Embodiment 1

[0026] Embodiment 1: Methanol-electricity polygeneration system with coal synthesis gas, according to figure 1 The raw material 1 coal consumption shown is 31.6kg / s, the gasification 2 coal and other feed effective energy (hereinafter referred to as exergy) total exergy is 883.3MW, and the gas volume of the purified syngas after purification 3 into synthesis 5 is 2.778kmol / s, The gas composition and flow rates are shown in Table 1. In the chemical synthesis process 5, the attached figure 2 According to the process, the synthesis gas passes through the synthesis of methanol once, and the synthesis gas 32 heated to about 220°C by the heat exchanger 31 with the tower gas 34 under the pressure of 5Mpa enters the methanol synthesis reactor 33, and at about 100M 3 Under the action of a methanol catalyst, the H in methanol synthesis gas at a temperature of about 220-270°C 2 and CO, CO 2 Synthesize CH 3 OH, the vaporization temperature of the water in the heat exchange tube group...

Embodiment 2

[0030] Embodiment 2: Coal-to-synthesis gas dimethyl ether-power polygeneration system, also used figure 1 Shown operation, what generate in the operation 5 that is different from example 1 is dimethyl ether, use figure 2 The process shown is one-step synthesis gas production of dimethyl ether, the difference is that the reactor 33 uses a bifunctional catalyst composed of a copper-based methanol catalyst A and a gamma alumina or molecular sieve dehydration catalyst B of about 150M 3 Substitute the copper-based methanol synthesis catalyst in Example 1 to synthesize dimethyl ether at a pressure of 6Mpa and a temperature of 300°C. The temperature of the catalyst in the synthesis of dimethyl ether can also be used as the heat transfer medium in two sets of water-cooled heat exchange tubes, such as the vaporization temperature of water and The pressure is independently adjusted and controlled to achieve the purpose of reducing the temperature difference and uniform temperature bala...

Embodiment 3

[0031] Embodiment 3: coal-to-synthesis gas to gasoline-power polygeneration system, using figure 1 The process shown and figure 2 Reactor and flow process, iron or cobalt based Fischer-Tropsch synthesis catalyst 120M is used in reactor 33 3 , with the same gas volume and composition of syngas in Table 1, 6.1kg / s synthetic oil was produced at 4Mpa and a temperature of about 250°C, and 172MW of power was transmitted externally. For the data of co-production and converted sub-production, see Example 3 in Attached Table 2. The production-to-production relative energy-saving rate is 15.8%.

[0032] Table 2 Chemical-electricity polygeneration and production performance comparison table

[0033]

[0034] Beneficial effect

[0035] Compared with the prior art, the present invention has significant advantages. One is that different vaporization pressures and vaporization temperatures of the heat exchange medium are used for the catalyst layer heat exchange tube group in differ...

technical field

[0001] The invention relates to a method and equipment for a chemical and electric polygeneration system for producing synthetic gas from coal, natural gas, etc., and belongs to the technical fields of energy power and chemical engineering. Background technique

[0002] Due to the need for increased production capacity, as well as the benefits of investment and cost reduction, modern methanol, dimethyl ether and synthetic oil plants are accelerating towards large-scale development. Due to the limitations of equipment size and transportation, the current large-scale scheme at home and abroad is to use multiple One synthesis tower or multiple sets of synthesis devices are produced in parallel. This method has the disadvantages of large equipment, large area occupation, and complicated process; the second solution is to reduce the circulation ratio or pass through one time without circulation, and the multi-tower series synthesis and cooling are carried out alter...

Examples

Embodiment 1

[0026] Embodiment 1: Methanol-electricity polygeneration system with coal synthesis gas, according to figure 1 The raw material 1 coal consumption shown is 31.6kg / s, the gasification 2 coal and other feed effective energy (hereinafter referred to as exergy) total exergy is 883.3MW, and the gas volume of the purified syngas after purification 3 into synthesis 5 is 2.778kmol / s, The gas composition and flow rates are shown in Table 1. In the chemical synthesis process 5, the attached figure 2 According to the process, the synthesis gas passes through the synthesis of methanol once, and the synthesis gas 32 heated to about 220°C by the heat exchanger 31 with the tower gas 34 under the pressure of 5Mpa enters the methanol synthesis reactor 33, and at about 100M 3 Under the action of a methanol catalyst, the H in methanol synthesis gas at a temperature of about 220-270°C 2 and CO, CO 2 Synthesize CH 3 OH, the vaporization temperature of the water in the heat exchange tube group...

Embodiment 2

[0030] Embodiment 2: Coal-to-synthesis gas dimethyl ether-power polygeneration system, also used figure 1 Shown operation, what generate in the operation 5 that is different from example 1 is dimethyl ether, use figure 2 The process shown is one-step synthesis gas production of dimethyl ether, the difference is that the reactor 33 uses a bifunctional catalyst composed of a copper-based methanol catalyst A and a gamma alumina or molecular sieve dehydration catalyst B of about 150M 3 Substitute the copper-based methanol synthesis catalyst in Example 1 to synthesize dimethyl ether at a pressure of 6Mpa and a temperature of 300°C. The temperature of the catalyst in the synthesis of dimethyl ether can also be used as the heat transfer medium in two sets of water-cooled heat exchange tubes, such as the vaporization temperature of water and The pressure is independently adjusted and controlled to achieve the purpose of reducing the temperature difference and uniform temperature bala...

Embodiment 3

[0031] Embodiment 3: coal-to-synthesis gas to gasoline-power polygeneration system, using figure 1 The process shown and figure 2 Reactor and flow process, iron or cobalt based Fischer-Tropsch synthesis catalyst 120M is used in reactor 33 3 , with the same gas volume and composition of syngas in Table 1, 6.1kg / s synthetic oil was produced at 4Mpa and a temperature of about 250°C, and 172MW of power was transmitted externally. For the data of co-production and converted sub-production, see Example 3 in Attached Table 2. The production-to-production relative energy-saving rate is 15.8%.

[0032] Table 2 Chemical-electricity polygeneration and production performance comparison table

[0033]

[0034] Beneficial effect

[0035] Compared with the prior art, the present invention has significant advantages. One is that different vaporization pressures and vaporization temperatures of the heat exchange medium are used for the catalyst layer heat exchange tube group in differ...

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