CN220601791U - Steam temperature and pressure raising device - Google Patents
Steam temperature and pressure raising device Download PDFInfo
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- CN220601791U CN220601791U CN202322257821.0U CN202322257821U CN220601791U CN 220601791 U CN220601791 U CN 220601791U CN 202322257821 U CN202322257821 U CN 202322257821U CN 220601791 U CN220601791 U CN 220601791U
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- 238000010438 heat treatment Methods 0.000 claims abstract description 54
- 238000002156 mixing Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 8
- 238000005265 energy consumption Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 description 16
- 229920006395 saturated elastomer Polymers 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000002918 waste heat Substances 0.000 description 6
- 230000000087 stabilizing effect Effects 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The utility model discloses a steam temperature and pressure raising device, which comprises a first steam inlet pipe, wherein the first steam inlet pipe is connected with a steam inlet of a steam heater, a steam conveying device for preventing steam from flowing back is arranged on the first steam inlet pipe, a heating device for heating steam is arranged in the steam heater, a steam outlet of the steam heater is connected with a first steam discharge pipe, and a steam pressure control valve is arranged on the first steam discharge pipe. The device provided by the utility model is used for preparing high-temperature high-pressure steam by directly heating low-temperature low-pressure steam, and has the characteristic of low energy consumption.
Description
Technical Field
The utility model relates to the technical field of steam preparation, in particular to a steam temperature and pressure raising device.
Background
Current industrial enterprises require large volumes of steam for industrial production, while also producing large amounts of low quality industrial waste heat emissions. In recent years, the electricity, natural gas and coal equivalent grids for producing high-temperature steam are greatly increased, so that the steam production cost is high, and the profit of enterprises is influenced. Other steam production methods also comprise electromagnetic induction steam generators, are suitable for occasions requiring small-scale steam production, and are not suitable for the field of industrial steam with larger steam consumption scale.
The cost of using low-quality waste heat to prepare steam is lower than that of primary energy, so that waste heat recycling can be realized, and environmental pollution is reduced. The existing equipment and process production of a large amount of enterprises such as air compressors, refrigerators, solar photo-thermal engines, internal combustion engines and the like also generate hot water below 100 ℃, and the heat in the equipment and process production can be used for preparing low-cost steam, so that the energy-saving effect is achieved. The low-temperature low-pressure steam can be obtained by utilizing the hot water waste heat, the high-temperature high-pressure steam can be obtained by raising the temperature and the pressure of the low-temperature low-pressure steam, the existing method for preparing the high-temperature steam by utilizing the hot water waste heat is little in investment, the energy consumption for producing the steam is high, various technologies have certain limitations, such as the use of a high-temperature steam heat pump for producing the steam, the temperature of the waste heat water is above 60 ℃, the temperature of the produced steam is 100-120 ℃, the COP value is about 3, and the temperature and the pressure of the part with the higher temperature are raised by using a steam compressor. If the flash evaporation method is used, the waste heat temperature is generally higher than 70 ℃, low-temperature saturated steam at 70 ℃ is firstly prepared, and then the required high-temperature steam is prepared through multistage temperature and pressure increasing by a steam compressor. The method for preparing high-temperature steam by utilizing low-temperature steam generally adopts the compression of the steam to raise the temperature and the pressure, and has larger energy consumption and higher investment. In addition, the two methods are difficult to generate steam with higher temperature, such as high temperature steam with the temperature of more than 200 ℃ obtained by using a screw steam compressor, and the steam inlet temperature is more than 170 ℃.
Disclosure of Invention
The utility model provides a steam temperature and pressure raising device for raising the temperature and pressure of steam by directly heating the steam, aiming at solving the problem of high energy consumption of the existing steam temperature and pressure raising method.
In order to solve the technical problems, the utility model comprises a first steam inlet pipe, and is characterized in that: the steam heating device is characterized in that the first steam inlet pipe is connected with a steam heating device which exchanges heat with steam flowing into the first steam inlet pipe and can strip steam to a temperature, a steam conveying device for preventing steam from flowing back is arranged on the first steam inlet pipe, a steam outlet of the steam heating device is connected with a first steam discharge pipe, and a steam pressure control valve is arranged on the first steam discharge pipe.
After the structure is adopted, low-temperature steam which needs to be heated and pressurized is introduced into the first steam inlet pipe, is sent into the steam heating device through the steam conveying equipment, and is subjected to heat exchange with the introduced low-temperature steam, the temperature and the pressure of the low-temperature steam are increased after the low-temperature steam is heated, the pressure of the steam discharged from the steam heating device is controlled by the steam pressure control valve, and when the pressure of the steam in the steam heating device reaches the set discharge pressure, the steam is discharged from the first steam discharge pipe. The temperature and pressure of the steam are increased after the steam is heated in the steam heating device, and the steam conveying equipment can prevent backflow after steam stripping pressure; the steam pressure control valve is used for controlling the pressure of steam discharge and stabilizing the pressure, so that the steam quality is improved. Compared with the high-temperature steam heat pump or the multi-stage steam compressor which improves the temperature and pressure of steam through a compression method, the device adopts a direct heating method to improve the temperature and pressure of the steam, the energy conversion rate of the direct heating method is higher, the direct heating method consumes less energy under the condition that the temperature and pressure of source steam are the same as that of the produced steam, and the produced steam with high temperature and high pressure can be directly obtained as long as the temperature of heating equipment is high enough, the multi-stage steam compressor is not required to be arranged, and the equipment investment is reduced.
Further, the steam conveying equipment is a vacuum air heater or a steam compressor.
Further, the steam outlet pressure of the steam conveying equipment is more than 1.6 MPa.
Further, the steam heating device is a steam heater for heating and raising the temperature of the steam which is introduced into the first steam inlet pipe, heating equipment is arranged in the steam heater, and the heating equipment is an electromagnetic heater, an electric heater or a heat exchanger.
Further, a first emptying pipe for discharging condensed water is arranged at the bottom of the steam heater, and a control valve is arranged on the first emptying pipe.
Further, the steam heating device is a steam mixing tank which is used for mixing and heating with the steam which is introduced into the first steam inlet pipe, and the steam mixing tank is connected with a second steam inlet pipe which is used for introducing heat source steam.
Furthermore, a second emptying pipe for discharging condensed water is arranged at the bottom of the steam mixing tank, and a control valve is arranged on the second emptying pipe.
Further, the first steam discharge pipe is connected with a steam inlet of the surge tank, and a steam outlet of the surge tank is connected with a second steam discharge pipe.
Furthermore, a third emptying pipe for discharging the condensed water is arranged at the bottom of the pressure stabilizing tank, and a control valve is arranged on the third emptying pipe.
The steam temperature and pressure raising device adopts a heat exchange method to heat steam to raise the temperature and pressure of the steam, when the pressure of the steam after temperature and pressure raising reaches a set pressure, the steam is discharged from a steam heater, a steam pressure control valve is used for controlling and stabilizing the pressure of the steam discharge, the steam after temperature and pressure raising is sent to a steam end after being stabilized by a pressure stabilizing tank, and steam conveying equipment on a first steam inlet pipe plays roles of conveying the steam and preventing backflow after steam stripping temperature and pressure raising; the steam heating device can adopt electromagnetic heating, electric heating, high-temperature steam with the temperature higher than the temperature of the produced steam, high-temperature flue gas and high-temperature liquid as heating sources, and can also adopt the mixing of low-temperature steam and high-grade steam with the temperature higher than the temperature of the produced steam for temperature raising, so that the source of the heat sources is wide. Compared with the compression method for improving the temperature and pressure of the steam, the direct heating method has higher energy conversion efficiency and lower energy consumption, can directly heat the low-temperature steam into the high-temperature high-pressure steam with the required temperature and pressure under the condition that the temperature of a heat source is high enough, does not need multistage compression, and reduces equipment investment. The utility model has the characteristic of low investment energy consumption.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of a steam mixing tank as a steam heating device;
in the figure: 1-a first steam inlet pipe; 11-a steam delivery device; 2-a steam heater; 21-a heating device; 22-a first evacuation tube; 3-a first steam discharge pipe; 31-a steam pressure control valve; 4-a surge tank; 41-a third evacuation tube; 5-a second steam discharge pipe; 6-a steam mixing tank; 61-a second steam inlet; 62-second evacuation tube.
Detailed Description
Referring to fig. 1, a steam temperature and pressure raising device comprises a first steam inlet pipe 1 for low-temperature low-pressure steam (i.e. steam to be raised), wherein the first steam inlet pipe 1 is connected with a steam inlet of a steam heating device, the steam heating device is a steam heater 2, a steam conveying device 11 is arranged on the first steam inlet pipe 1, the steam conveying device 11 can adopt a vacuum hot air blower or a steam compressor, the pressure of a steam outlet of the steam conveying device 11 is above 1.6MPa, and the steam conveying device 11 plays roles in conveying steam and preventing backflow after heating and boosting the steam fed into the steam heater 2. The steam heater 2 is internally provided with a heating device 21 for heating steam, the heating device 21 can heat the steam by adopting an electromagnetic heater or an electric heater and the like, or can heat the steam by adopting a heat exchanger, and a high-temperature fluid with the temperature higher than the temperature of the produced steam is introduced into the heat exchanger as a heat source to heat the steam, wherein the high-temperature fluid is derived from the high-temperature steam, high-temperature flue gas, high-temperature liquid and the like, such as the high-temperature flue gas generated by a gas-fired boiler and a coal-fired boiler, the high-temperature steam residual steam generated by the high-temperature steam boiler, the high-temperature liquid generated in the production process and the like, and the produced steam refers to the steam after the temperature and pressure are raised by the steam heater 2.
Referring to fig. 1, a steam outlet of a steam heater 2 is connected with a first steam discharge pipe 3, a steam pressure control valve 31 is arranged on the first steam discharge pipe 3, the steam pressure control valve 31 is used for controlling the pressure of discharged steam and can play a role in stabilizing the discharge steam pressure, so that the quality of the steam is improved, and a self-operated steam pressure regulating valve can be adopted as the steam pressure control valve 31; the bottom of the steam heater 2 is provided with a first emptying pipe 22 for discharging condensed water, the first emptying pipe 22 is provided with a control valve, and the control valve is in a closed state during normal operation. The first steam discharge pipe 3 is connected with the steam inlet of the surge tank 4, the steam outlet of the surge tank 4 is connected with the second steam discharge pipe 5, the bottom of the surge tank 4 is provided with a third emptying pipe 41 for discharging condensate water, the third emptying pipe 41 is provided with a control valve, and the control valve is in a closed state during normal operation.
Fig. 2 is another embodiment, substantially identical to fig. 1, except that: the steam heating device replaces the steam heater 2 in fig. 1 with the steam mixing tank 6, the steam mixing tank 6 is connected with a second steam inlet pipe 61, high-grade steam (without impurities) is introduced into the second steam inlet pipe 61, the temperature and pressure of the steam introduced into the second steam inlet pipe 61 are higher than the temperature and pressure of the steam discharged from the steam mixing tank 6, and the low-temperature low-pressure steam introduced into the first steam inlet pipe 1 is mixed with the high-temperature steam introduced into the second steam inlet pipe 61 to improve the temperature and pressure of the steam.
It should be noted that: the actual equipment and pipelines are also provided with conventional accessories such as valves, meters, access ports and the like, such as a thermometer for detecting steam temperature, a pressure gauge for detecting steam pressure, a safety valve on a tank body and the like, and the accessories are conventional in the field and are not shown in the figure. The utility model does not limit the form of the heating equipment 21 in the steam heater 2, and can adopt an electric heater or an electromagnetic heater, and can also adopt a heat exchanger, wherein the heat source of the heat exchanger is from high-temperature steam, high-temperature flue gas and high-temperature liquid with the temperature higher than the temperature of the steam to be produced.
The working process comprises the following steps: introducing low-temperature low-pressure steam into the first steam inlet pipe 1, pressurizing the steam by the steam conveying equipment 11, and then sending the pressurized steam into a steam heating device; the steam outlet pressure of the steam pressure control valve 31 is set, the steam heating device heats steam, the temperature and the pressure of the heated steam are increased, when the temperature of the steam reaches the set exhaust pressure, the steam is discharged from the first steam discharge pipe 3, enters the surge tank 4 for pressure stabilization, and is sent to a steam end. Under the conditions that the temperature of the steam heating device is high enough and the steam outlet pressure of the steam conveying equipment 11 is higher than the steam pressure, the device can directly heat low-temperature and low-pressure steam into required high-temperature and high-pressure steam, a multi-stage steam compressor is not required, and the equipment investment is reduced.
Table 1 shows a comparison table of pressure, temperature and enthalpy values of saturated steam, and it can be seen from the table that the saturated steam pressure at 200 ℃ is 1.5551MPa, when the steam is heated in the steam heating device to 200 ℃, the discharge pressure 1.5551MPa of the steam heating device is controlled by the steam pressure control valve 31, so that saturated steam at 200 ℃ can be obtained, and since the outlet pressure of the vacuum air heater or the steam compressor is above 1.6MPa, no backflow of steam occurs, and when the heat source temperature of the steam heating device and the outlet pressure of the vacuum air heater or the steam compressor are sufficiently high, steam with higher temperature and pressure can be produced.
Example 1
The low-temperature saturated steam with the temperature of 30 ℃ is sent into the steam heater 2 through the steam conveying equipment 11, the flow rate during steam conveying is 2t/h, the steam discharge pressure of the steam pressure control valve 31 is set to 1.5551MPa, and when the steam is electrically heated to 200 ℃ and 1.5551MPa in the steam heater 2, the steam enters the surge tank 4 and is conveyed to a steam end through the second steam discharge pipe 5.
This example produces 1t of 200 ℃ saturated steam with approximately 200kWh energy consumption. If a flash evaporation and multistage vapor compressor method is adopted, the energy consumption for producing 1t of 200 ℃ saturated steam is about 250kWh; if the steam heat pump and the multistage water vapor compressor method are adopted, the energy consumption for producing 1t of 200 ℃ saturated steam is about 400kWh, and low-temperature saturated steam is required to be compressed and lifted by the multistage water vapor compressor, so that the energy consumption is very high.
According to the steam temperature and pressure increasing device, the steam heating device directly heats low-temperature low-pressure steam to obtain high-temperature high-pressure steam, the first steam inlet pipe of the steam heating device is provided with the steam conveying equipment to prevent backflow after the steam is heated, the first steam outlet pipe of the steam heating device is provided with the steam pressure control valve, so that the pressure of produced steam can be controlled, the pressure of the produced steam is regulated, and the steam quality is improved. The device can obtain steam with the temperature of 200 ℃ or even higher by directly heating the steam, has simple temperature and pressure raising, and has the characteristics of low investment and low energy consumption.
Claims (9)
1. The utility model provides a steam temperature and pressure raising device, includes first steam advances pipe (1), characterized by: the steam heating device is characterized in that the first steam inlet pipe (1) is connected with a steam heating device which exchanges heat with steam flowing into the first steam inlet pipe (1) and can steam and strip steam to a temperature, a steam conveying device (11) for preventing steam from flowing back is arranged on the first steam inlet pipe (1), a steam outlet of the steam heating device is connected with a first steam discharge pipe (3), and a steam pressure control valve (31) is arranged on the first steam discharge pipe (3).
2. The steam temperature and pressure increasing device according to claim 1, wherein: the steam conveying equipment (11) is a vacuum air heater or a steam compressor.
3. The steam temperature and pressure increasing device according to claim 2, characterized in that: the pressure of a steam outlet of the steam conveying equipment (11) is more than 1.6 MPa.
4. The steam temperature and pressure increasing device according to claim 1, wherein: the steam heating device is a steam heater (2) for heating and raising the temperature of steam fed into the first steam inlet pipe (1), heating equipment (21) is arranged in the steam heater (2), and the heating equipment (21) is an electromagnetic heater, an electric heater or a heat exchanger.
5. The steam temperature and pressure increasing device according to claim 4, wherein: the bottom of the steam heater (2) is provided with a first emptying pipe (22) for discharging condensed water, and the first emptying pipe (22) is provided with a control valve.
6. The steam temperature and pressure increasing device according to claim 1, wherein: the steam heating device is a steam mixing tank (6) for mixing and heating with the steam introduced into the first steam inlet pipe (1), and the steam mixing tank (6) is connected with a second steam inlet pipe (61) for introducing heat source steam.
7. The steam temperature and pressure increasing device according to claim 6, wherein: the bottom of the steam mixing tank (6) is provided with a second emptying pipe (62) for discharging condensed water, and the second emptying pipe (62) is provided with a control valve.
8. The steam temperature and pressure increasing device according to claim 1, wherein: the first steam discharge pipe (3) is connected with a steam inlet of the surge tank (4), and a steam outlet of the surge tank (4) is connected with a second steam discharge pipe (5).
9. The steam temperature and pressure increasing device according to claim 8, wherein: the bottom of the surge tank (4) is provided with a third emptying pipe (41) for discharging condensed water, and the third emptying pipe (41) is provided with a control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322257821.0U CN220601791U (en) | 2023-08-22 | 2023-08-22 | Steam temperature and pressure raising device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322257821.0U CN220601791U (en) | 2023-08-22 | 2023-08-22 | Steam temperature and pressure raising device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220601791U true CN220601791U (en) | 2024-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322257821.0U Active CN220601791U (en) | 2023-08-22 | 2023-08-22 | Steam temperature and pressure raising device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220601791U (en) |
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2023
- 2023-08-22 CN CN202322257821.0U patent/CN220601791U/en active Active
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