A desalted water system for a pure oxygen reformer

Abstract

The utility model discloses a desalted water system for a pure oxygen converter, characterized in that it comprises a desalted water inlet pipeline, a desalted water storage tank, a converter, a circulating water heat exchanger, a deaerator, a boiler feed water heat exchanger, a steam drum and a heating furnace; the desalted water inlet pipeline upstream of the cooling water inlet valve is also connected to the water inlet of the desalted water storage tank through a pipeline, and the water outlet of the desalted water storage tank is connected to the jacket water inlet of the converter through a pipeline; a tank inlet valve is arranged on the pipeline connecting the desalted water inlet pipeline and the desalted water storage tank. The utility model has the advantages that when the desalted water inlet pipeline or the cooling water inlet pump fails to be used normally, the desalted water first enters the desalted water storage tank, and then is pumped into the jacket of the converter by the tank water pump, and after absorbing heat, the desalted water enters the circulating water heat exchanger for cooling, and then enters the desalted water storage tank as cooling water for circulation again, so that cooling water can be continuously and stably provided for the jacket of the converter to avoid high-temperature burning of the jacket.

Description

Technical field:

[0001] The utility model relates to a desalted water system, in particular to a desalted water system of a pure oxygen converter. Background technology:

[0002] When synthesizing methanol, the methane in the desulfurized coke oven gas needs to be converted into CO, CO2 and H2 by the converter. During the operation of the converter, the temperature inside the converter can reach over 1000℃. In order to protect the converter, a jacket is provided outside the converter, and the high temperature inside the converter is removed by passing desalted water into the jacket. At present, desalted water is mostly sent by chemical pure water stations. Due to the long desalted water pipeline, there are unstable factors such as damage and leakage of the water pipeline or failure of the desalted water pump in production, which leads to the interruption of desalting water in the converter jacket, causing the jacket temperature to rise sharply, which not only affects the service life of the converter, but also may cause serious accidents. At the same time, the temperature of the converted gas coming out of the converter is relatively high. At present, it only enters the synthesis process after a simple cooling, and the heat is not effectively utilized, which increases the operating energy consumption of the system and affects the economic benefits of the enterprise. Utility model content:

[0003] In order to solve the above problems, the utility model aims to provide a desalted water system for a pure oxygen reformer.

[0004] The utility model is implemented by the following technical solutions:

[0005] A desalted water system for a pure oxygen reformer, comprising a desalted water pipeline, a desalted water storage tank, a reformer, a circulating water heat exchanger, a deaerator, a boiler feed water heat exchanger, a steam drum and a heating furnace;

[0006] The outlet end of the desalted water pipeline is connected to the jacket water inlet of the converter, and a cooling water inlet valve and a cooling water inlet pump are provided on the desalted water pipeline; the desalted water pipeline upstream of the cooling water inlet valve is also connected to the water inlet of the desalted water storage tank through a pipeline, and the outlet of the desalted water storage tank is connected to the jacket water inlet of the converter through a pipeline; a tank water inlet valve is provided on the pipeline connecting the desalted water pipeline and the desalted water storage tank, and a tank water pump is provided on the pipeline connecting the desalted water storage tank and the jacket of the converter;

[0007] The jacket water outlet of the converter is connected with the heat medium inlet of the circulating water heat exchanger through a pipeline. The heat medium outlet of the circulating water heat exchanger is divided into two paths, one of which is connected with the water inlet of the desalted water storage tank through a pipeline, and the other is connected with the water inlet of the deaerator through a pipeline. The water outlet of the deaerator is connected with the cold medium inlet of the boiler feed water heat exchanger through a pipeline. The cold medium outlet of the boiler feed water heat exchanger is connected with the liquid inlet of the steam drum through a pipeline. The steam outlet of the steam drum is connected with the inlet of the first cold medium channel of the heating furnace through a pipeline. The outlet of the first cold medium channel of the heating furnace is divided into two paths, one of which is connected with the external steam pipeline through a pipeline, and the other is connected with the inlet of the oxygen steam pipeline of the converter through a pipeline.

[0008] Furthermore, the gas outlet at the bottom of the reformer is connected to the heat medium inlet of the steam generator through a pipeline, the heat medium outlet of the steam generator is connected to the heat medium inlet of the coke heater through a pipeline, the heat medium outlet of the coke heater is connected to the heat medium inlet of the boiler feed water heat exchanger through a pipeline, the heat medium outlet of the boiler feed water heat exchanger is connected to the heat medium inlet of the reforming gas heat exchanger through a pipeline, and the heat medium outlet of the reforming gas heat exchanger is connected to the reforming gas inlet of the methanol synthesis system through a pipeline.

[0009] Furthermore, the desulfurized coke oven gas pipeline is connected to the cold medium inlet of the coke evaporator heater, the cold medium outlet of the coke evaporator heater is connected to the inlet of the second cold medium channel of the heating furnace through a pipeline, and the outlet of the second cold medium channel of the heating furnace is connected to the coke oven gas inlet of the converter through a pipeline.

[0010] Furthermore, the liquid outlet of the steam drum is communicated with the liquid inlet of the steam generator, and the steam outlet of the steam generator is communicated with the steam inlet of the steam drum.

[0011] Advantages of the utility model:

[0012] The high-temperature conversion gas discharged from the converter can be used as a heat source to heat water to generate steam. After doing work, it can also preheat the desulfurized coke oven gas, thereby reducing the energy consumption of the heating furnace. After heat exchange with desalted water, the desalted water is preheated to generate steam, and the steam can be used as oxygen inlet steam and mixed with oxygen to enter the converter, thereby reducing the overall energy consumption of the system.

[0013] When the desalted water pipeline or cooling water inlet pump fails to function normally due to an abnormality, open the tank inlet valve to allow the desalted water to enter the desalted water storage tank first, and then be pumped into the jacket of the converter by the tank water pump. After absorbing heat, the desalted water enters the circulating water heat exchanger for cooling, and then enters the desalted water storage tank as cooling water for circulation again, thereby ensuring that cooling water can be continuously and stably provided to the converter jacket to avoid high-temperature burning of the jacket, thereby protecting the converter. Description of the drawings:

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 Schematic diagram of system connection of this embodiment.

[0016] In the figure: desalted water inlet pipeline 1, desalted water storage tank 2, converter 3, circulating water heat exchanger 4, deaerator 5, boiler feed water heat exchanger 6, steam drum 7, heating furnace 8, cooling water inlet valve 9, cooling water inlet pump 10, storage tank inlet valve 11, storage tank water pump 12, external steam pipeline 13, oxygen steam pipeline 14, steam generator 15, coke heater 16, conversion gas heat exchanger 17, methanol synthesis system 18, desulfurized coke oven gas inlet pipeline 19. Specific implementation method:

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] Embodiment 1:

[0019] like Figure 1 A desalted water system of a pure oxygen reformer is shown, comprising a desalted water pipeline 1, a desalted water storage tank 2, a reformer 3, a circulating water heat exchanger 4, a deaerator 5, a boiler feed water heat exchanger 6, a steam drum 7 and a heating furnace 8;

[0020] The outlet end of the desalted water pipeline 1 is connected to the jacket water inlet of the converter 3, and a cooling water inlet valve 9 and a cooling water inlet pump 10 are provided on the desalted water pipeline 1; the desalted water pipeline 1 upstream of the cooling water inlet valve 9 is also connected to the water inlet of the desalted water storage tank 2 through a pipeline, and the outlet of the desalted water storage tank 2 is connected to the jacket water inlet of the converter 3 through a pipeline; a tank water inlet valve 11 is provided on the pipeline connecting the desalted water pipeline 1 and the desalted water storage tank 2, and a tank water pump 12 is provided on the pipeline connecting the desalted water pipeline 1 and the desalted water storage tank 2 and the jacket of the converter 3;

[0021] The jacket water outlet of the reformer 3 is connected to the heat medium inlet of the circulating water heat exchanger 4 through a pipeline. The heat medium outlet of the circulating water heat exchanger 4 is divided into two paths, one of which is connected to the water inlet of the desalted water storage tank 2 through a pipeline, and the other is connected to the water inlet of the deaerator 5 through a pipeline. The water outlet of the deaerator 5 is connected to the cold medium inlet of the boiler feed water heat exchanger 6 through a pipeline. The cold medium outlet of the boiler feed water heat exchanger 6 is connected to the liquid inlet of the drum 7 through a pipeline. The steam outlet of the drum 7 is connected to the inlet of the first cold medium channel of the heating furnace 8 through a pipeline. The outlet of the first cold medium channel of the heating furnace 8 is divided into two paths, one of which is connected to the external steam pipeline 13 through a pipeline, and the other is connected to the inlet of the oxygen steam pipeline 14 of the reformer 3 through a pipeline.

[0022] The gas outlet at the bottom of the reformer 3 is connected to the heat medium inlet of the steam generator 15 through a pipeline, the heat medium outlet of the steam generator 15 is connected to the heat medium inlet of the coke heater 16 through a pipeline, the heat medium outlet of the coke heater 16 is connected to the heat medium inlet of the boiler feed water heat exchanger 6 through a pipeline, the heat medium outlet of the boiler feed water heat exchanger 6 is connected to the heat medium inlet of the reformed gas heat exchanger 17 through a pipeline, and the heat medium outlet of the reformed gas heat exchanger 17 is connected to the reformed gas inlet of the methanol synthesis system 18 through a pipeline. The liquid outlet of the drum 7 is connected to the liquid inlet of the steam generator 15, and the steam outlet of the steam generator 15 is connected to the steam inlet of the drum 7.

[0023] The desulfurized coke oven gas pipeline 19 is connected to the cold medium inlet of the coke evaporator heater 16, and the cold medium outlet of the coke evaporator heater 16 is connected to the inlet of the second cold medium channel of the heating furnace 8 through a pipeline, and the outlet of the second cold medium channel of the heating furnace 8 is connected to the coke oven gas inlet of the converter 3 through a pipeline.

[0024] Job Description:

[0025] When using this embodiment, when the desalted water pipeline 1 and the cooling water inlet pump 10 are both in normal use, the desalted water in the desalted water pipeline 1 directly enters the jacket of the reformer 3 to absorb the heat in the reformer 3. The desalted water after absorbing heat first enters the circulating water heat exchanger 4 and then enters the deaerator 5 for deoxidation. At the same time, the temperature of the reformed gas discharged from the bottom of the reformer 3 is about 980°C. The high-temperature reformed gas first enters the steam generator 15 as a heat source to heat water to generate steam. After doing work, the temperature of the reformed gas discharged from the steam generator 15 is about 450°C. It enters the coke heater 16 as a heat medium again to exchange heat with the desulfurized coke oven gas. After heat exchange, the reformed gas at about 380°C enters the boiler feed water heat exchanger 6 as a heat medium to exchange heat with the deoxygenated desalted water. After heat exchange, the temperature of the reformed gas is about 280°C. After being cooled to about 40°C by the reformed gas heat exchanger 17, it enters the methanol synthesis system 18 for synthesizing methanol.

[0026] After the desalted water has exchanged heat with the reformed gas, it enters the steam drum 7, is converted into steam by the steam generator 15, and is heated again by the heating furnace 8. A portion of it is sent out, and a portion of it is mixed with oxygen as oxygen steam and enters the reformer 3 as process gas to participate in the reaction. The desulfurized coke oven gas, which has exchanged heat with the reformed gas, is heated to about 600°C by the heating furnace 8 and enters the reformer 3 as raw gas for reforming.

[0027] In this embodiment, when the desalted water pipeline 1 or the cooling water inlet pump 10 is abnormal and cannot be used normally, the tank inlet valve 11 is opened to allow the desalted water to first enter the desalted water storage tank 2, and then be sent into the jacket of the converter 3 by the tank water pump 12. After absorbing heat, the desalted water enters the circulating water heat exchanger 4 for cooling, and then enters the desalted water storage tank 2 as cooling water for circulation again, thereby ensuring that cooling water can be continuously and stably provided to the jacket of the converter 3 to avoid high-temperature burning of the jacket, thereby protecting the converter 3.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A desalted water system for a pure oxygen reformer, characterized in that: Including desalted water pipeline, desalted water storage tank, converter, circulating water heat exchanger, deaerator, boiler feed water heat exchanger, steam drum and heating furnace; The outlet end of the desalted water pipeline is connected to the jacket water inlet of the converter, and a cooling water inlet valve and a cooling water inlet pump are provided on the desalted water pipeline; the desalted water pipeline upstream of the cooling water inlet valve is also connected to the water inlet of the desalted water storage tank through a pipeline, and the outlet of the desalted water storage tank is connected to the jacket water inlet of the converter through a pipeline; a tank water inlet valve is provided on the pipeline connecting the desalted water pipeline and the desalted water storage tank, and a tank water pump is provided on the pipeline connecting the desalted water storage tank and the jacket of the converter; The jacket water outlet of the converter is connected with the heat medium inlet of the circulating water heat exchanger through a pipeline. The heat medium outlet of the circulating water heat exchanger is divided into two paths, one of which is connected with the water inlet of the desalted water storage tank through a pipeline, and the other is connected with the water inlet of the deaerator through a pipeline. The water outlet of the deaerator is connected with the cold medium inlet of the boiler feed water heat exchanger through a pipeline. The cold medium outlet of the boiler feed water heat exchanger is connected with the liquid inlet of the steam drum through a pipeline. The steam outlet of the steam drum is connected with the inlet of the first cold medium channel of the heating furnace through a pipeline. The outlet of the first cold medium channel of the heating furnace is divided into two paths, one of which is connected with the external steam pipeline through a pipeline, and the other is connected with the inlet of the oxygen steam pipeline of the converter through a pipeline.

2. The desalted water system of a pure oxygen reformer according to claim 1, characterized in that: The gas outlet at the bottom of the reformer is connected to the heat medium inlet of the steam generator through a pipeline, the heat medium outlet of the steam generator is connected to the heat medium inlet of the coke heater through a pipeline, the heat medium outlet of the coke heater is connected to the heat medium inlet of the boiler feed water heat exchanger through a pipeline, the heat medium outlet of the boiler feed water heat exchanger is connected to the heat medium inlet of the reformed gas heat exchanger through a pipeline, and the heat medium outlet of the reformed gas heat exchanger is connected to the reformed gas inlet of the methanol synthesis system through a pipeline.

3. The desalted water system of a pure oxygen reformer according to claim 2, characterized in that: The desulfurized coke oven gas pipeline is connected to the cold medium inlet of the coke evaporator heater, the cold medium outlet of the coke evaporator heater is connected to the inlet of the second cold medium channel of the heating furnace through a pipeline, and the outlet of the second cold medium channel of the heating furnace is connected to the coke oven gas inlet of the converter through a pipeline.

4. The desalted water system of a pure oxygen reformer according to claim 2, characterized in that: The liquid outlet of the steam drum is communicated with the liquid inlet of the steam generator, and the steam outlet of the steam generator is communicated with the steam inlet of the steam drum.

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