CN115634640A - Outer wall temperature monitoring and controlling means of high temperature reaction furnace - Google Patents
Outer wall temperature monitoring and controlling means of high temperature reaction furnace Download PDFInfo
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- CN115634640A CN115634640A CN202211500647.1A CN202211500647A CN115634640A CN 115634640 A CN115634640 A CN 115634640A CN 202211500647 A CN202211500647 A CN 202211500647A CN 115634640 A CN115634640 A CN 115634640A
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Abstract
The application relates to a temperature monitoring and controlling device for the outer wall of a high-temperature reaction furnace, which comprises a cooling water jacket wrapped on the outer wall of the reaction furnace, wherein the cooling water jacket is in a hollow ring shape, a water inlet, a water outlet, an overflow port and a steam port are arranged on the cooling water jacket, the water inlet is communicated with a cooling water tank through a first pipeline, the water outlet is communicated with a sewage pipeline through a second pipeline, the overflow port is communicated with the cooling water tank through a third pipeline, and the steam port is communicated with a steam pipe network through a fourth pipeline; the first pipeline is connected in series with a cooling water booster pump. The reaction furnace can indirectly exchange heat with cooling water through the cooling device, replaces 0.5MPa steam for blowing and saves energy. The over-temperature condition of the outer wall of the reaction furnace can be continuously monitored through the temperature display of the cooling water jacket thermometer and the flow display of the cooling water flowmeter, so that the equipment safety is guaranteed. The heat energy emitted by the wall of the reaction furnace is recovered through the cooling device, and the byproduct of 0.5MPa steam is generated, thereby saving energy and reducing consumption.
Description
Technical Field
The application relates to a device for monitoring and controlling the outer wall temperature of a high-temperature reaction furnace.
Background
In the technical field of coal chemical industry, each reaction furnace is usually in a high-temperature state, taking a methane synthesis process as an example, the temperature of the reaction furnace of a methane synthesis device is higher than 600 ℃, in order to prevent high-temperature gas from directly contacting the inner wall of the reaction furnace, high-aluminum refractory castable is adopted to cover the inner wall of the reaction furnace, but due to the reasons of poor construction quality, long operation time and the like, the refractory castable is easy to crack, so that a high-temperature reaction medium directly contacts the inner wall of the reaction furnace, and the outer wall of the reaction furnace shows local overtemperature. Because the wall material of the reactor has limited high temperature resistance, if the overtemperature condition occurs in the normal production process, in order to avoid the overhigh temperature of the wall of the reactor and ensure the safe production, 0.5MPa steam is generally adopted to continuously purge the overtemperature position of the outer wall of the reactor. In the process of purging the 0.5MPa steam, the temperature change condition of the over-temperature part cannot be monitored, and the over-temperature part needs to be measured after the 0.5MPa steam is stopped for a period of time.
In actual operation, when the outer wall of the reaction furnace is over-heated, 0.5MPa steam needs to be used for continuously blowing and cooling, so that steam resource waste is caused. In the process of continuously purging and cooling by using 0.5MPa steam, the 0.5MPa steam can interfere with temperature measuring devices such as a temperature measuring gun and the like, and if the temperature of the outer wall of the reaction furnace needs to be detected, the purging by using the 0.5MPa steam needs to be stopped, so that the overtemperature condition of the reaction furnace wall cannot be continuously monitored on the premise of ensuring the safety of equipment, and the safety of the equipment is not facilitated. The heat emitted by the outer wall of the reaction furnace is not recycled, which is not beneficial to energy conservation and consumption reduction.
Disclosure of Invention
In view of the above existing defects, the present application aims to provide a device for monitoring and controlling the temperature of the outer wall of a high temperature reaction furnace, which can continuously monitor the over-temperature condition of the outer wall of the reaction furnace, ensure the safety of equipment, save energy and reduce consumption.
The purpose of the application is realized as follows: a temperature monitoring and controlling device for the outer wall of a high-temperature reaction furnace comprises a cooling water jacket which is sleeved on the outer wall of the reaction furnace, wherein the cooling water jacket is in a hollow ring shape, a water inlet, a water outlet, an overflow opening and a steam opening are formed in the cooling water jacket, the water inlet is communicated with a cooling water tank through a first pipeline, the water outlet is communicated with a sewage pipeline through a second pipeline, the overflow opening is communicated with the cooling water tank through a third pipeline, and the steam opening is communicated with a steam pipe network through a fourth pipeline; the first pipeline is connected in series with a cooling water booster pump.
The cooling water jacket comprises a shell, the shell is a cylinder with a cavity, a water jacket layer is arranged on the outer wall of the ring shell, and the inner wall of the water jacket layer is in contact with the outer wall of the high-temperature reaction furnace. The upper end and the lower end of the inner wall of the water jacket layer extend out of the open ends of the upper end and the lower end of the shell to form limiting heads; the inner wall of the water jacket layer comprises a heat transfer layer and a plurality of limiting elastic sheets which are arranged on the outer surface of the heat transfer layer in sequence.
Due to the adoption of the technical scheme, the cooling device provided by the invention can be installed, so that the outer wall of the reaction furnace can indirectly exchange heat with cooling water to replace 0.5MPa steam purging, and the energy is saved. The over-temperature condition of the outer wall of the reaction furnace can be continuously monitored through the temperature display of the cooling water jacket thermometer and the flow display of the cooling water flowmeter, so that the equipment safety is guaranteed. The heat energy emitted by the wall of the reaction furnace is recovered through the cooling device, and the byproduct of 0.5MPa steam is generated, thereby saving energy and reducing consumption.
Drawings
The specific structure of the application is given by the following figures and examples:
FIG. 1 is a schematic structural diagram of the present application;
FIG. 2 is a schematic view of a cooling water jacket structure;
fig. 3 is a schematic view of the inner wall structure of the housing.
Legend: 1. refractory castable, 2, a skirt, 3, a cooling water jacket, 301, a shell, 302, a limiting head, 303, an inner wall, 304, a heat transfer layer, 305, a limiting elastic sheet, 4, a steam pressure control valve, 5, a cooling water flow control valve, 6, a cooling water booster pump, 7, a cooling water tank, 8, a cooling water jacket thermometer, 9, a cooling water jacket liquid level meter, 10, a cooling water jacket pressure gauge, 11, a minimum reflux valve of the cooling water booster pump, 12, a water jacket overflow valve, 13, a desalted water flow control valve, 14, a cooling water tank liquid level meter, 15, a water jacket liquid discharge valve, 16, a cooling water flowmeter, 17, 0.5MPa steam pipe network check valve.
Detailed Description
The present application is not limited to the following examples, and specific implementations may be determined according to the technical solutions and practical situations of the present application.
The embodiment is as follows: as shown in fig. 1-3, a device for monitoring and controlling the temperature of the outer wall of a high-temperature reaction furnace comprises a cooling water jacket 3 wrapped on the outer wall of the reaction furnace, wherein the cooling water jacket 3 is in a hollow annular shape, the cooling water jacket 3 is provided with a water inlet, a water outlet, an overflow port and a steam port, the water inlet is communicated with a cooling water tank 7 through a first pipeline, the water outlet is communicated with a sewage pipeline through a second pipeline, the overflow port is communicated with the cooling water tank 7 through a third pipeline, and the steam port is communicated with a steam pipe network through a fourth pipeline; a cooling water booster pump 6 is connected in series to the first pipeline.
Furthermore, a return pipe is communicated with the first pipeline, the water outlet end of the return pipe is communicated with the interior of the cooling water tank 7, and a return valve 11 is installed on the return pipe.
Further, a flow control valve 5 and a cooling water flow meter 16 are connected in series to the rear first line of the cooling water booster pump 6.
Further, a cooling water jacket thermometer 8, a cooling water jacket liquid level meter 9 and a cooling water jacket pressure gauge 10 are arranged on the side wall of the cooling water jacket 3.
The cooling water tank 7 is provided with a fluid infusion port which is communicated with a fluid infusion pipeline and is provided with a desalted water flow control valve 13.
Further, a cooling water tank liquid level meter 14 is arranged on the side wall of the cooling water tank 7.
A water jacket overflow valve 12 is installed on the third line.
And a steam pressure control valve 4 and a 0.5MPa steam pipe network check valve are arranged on the fourth pipeline.
As shown in fig. 2-3, the cooling water jacket 3 includes a housing 301, the housing 301 is a hollow cylinder, a water jacket layer is disposed around the outer wall of the housing 301, and the inner wall 303 of the water jacket layer contacts with the outer wall of the high temperature reaction furnace. The upper end and the lower end of the inner wall 303 of the water jacket layer extend out of the open ends of the upper end and the lower end of the shell 301 to form limiting heads 302; the inner wall 303 of the water jacket layer comprises a heat transfer layer 304 and a plurality of limiting elastic sheets 305 arranged on the outer surface of the heat transfer layer 304 in sequence. The limit spring 305 protrudes inwards to form the clamping to the outer wall of the high-temperature reaction furnace, and the limit head 302 is used for abutting against the skirt to determine the lowest clamping position. The temperature of the outer wall of the high temperature reactor is transferred to the fluid within the water jacket layer by the heat transfer layer 304.
When the cooling water jacket is used, the cooling water jacket is prevented from being directly welded on the outer wall of the high-temperature reaction furnace, and the safety of equipment is guaranteed. The direct contact between the outer wall of the reaction furnace and cooling water is avoided, and the corrosion of the outer wall of the reaction furnace is prevented. In order to avoid the influence on equipment safety caused by the direct welding of the cooling water jacket 3 on the outer wall of the reaction furnace, the cooling water jacket 3 adopts a self-sealing structure (equivalent to an annular cooling water tank surrounding the outer wall of the reaction furnace), so that the inner wall of the cooling water jacket 3 is in close contact with the outer wall of the reaction furnace for heat transfer, the temperature of the outer wall of the reaction furnace is reduced, the problem of corrosion of the outer wall caused by the long-term contact of cooling water with the outer wall of the reaction furnace is also avoided, and the reaction furnace skirt 2 can assist in supporting the weight of the cooling water jacket 3.
The cooling water of the cooling water jacket 3 adopts desalted water, so that the corrosion to the pipeline of the cooling device equipment can be reduced, and meanwhile, the byproduct of the cooling device, namely 0.5MPa steam, can be directly merged into a steam pipe network. In order to reduce the heat loss of the cooling water jacket 3, the outer side of the cooling water jacket 3 is covered by heat preservation cotton for heat preservation.
Before the cooling water jacket 3 is put into operation, the cooling water tank 7 is required to be set up to be at a normal liquid level. In the process of establishing the liquid level, the liquid level meter 14 of the cooling water tank monitors the liquid level of the water tank in real time, transmits a liquid level signal to the desalted water flow control valve 13, establishes the liquid level of the cooling water tank 7 to 80%, and then controls the liquid level of the cooling water tank 7 to be 50-80% through the desalted water flow control valve 13.
The cooling water booster pump 6 is started, the liquid level of the cooling water jacket 3 is established, in the liquid level establishing process, the liquid level of the cooling water jacket liquid level meter 9 monitors the liquid level in real time, liquid level signals are transmitted to the cooling water flow control valve 5, and the liquid level of the cooling water jacket 3 is established to 90% by controlling the opening degree of the cooling water flow control valve 5. In the process of establishing the liquid level, the overflow valve 12 of the water jacket is opened to prevent the overpressure caused by the fact that the cooling water jacket 3 is filled with water, after the liquid level is normal, the overflow valve 12 of the water jacket is closed, the liquid level of the cooling water jacket 3 is controlled to be 80% -90%, and the pressure of the steam pressure control valve 4 is set to be 0.5MPa for automatic control. When the liquid level of the cooling water jacket 3 is lower than 80%, the cooling water booster pump 6 is automatically started; when the liquid level of the cooling water jacket 3 is higher than 90%, the cooling water booster pump 6 is automatically stopped.
In the normal operation process of the reaction furnace, a control room personnel monitors the pressure of the cooling water jacket 3 through the cooling water jacket pressure gauge 10, and can measure the temperature of the outer wall of the reaction furnace according to the temperature corresponding to the saturated vapor pressure of water, for example, the pressure of the cooling water jacket 3 is displayed as 0.5MPa, and the temperature of the outer wall of the reaction furnace can be measured to be about 150 ℃. If the temperature of the outer wall of the reaction furnace is lower and cannot reach the temperature of the byproduct low-pressure steam, under the condition of constant temperature of the outer wall of the reaction furnace, the pressure of the cooling water jacket 3 is kept constant and is less than 0.5MPa, the liquid level of the cooling water jacket 3 is kept constant at the moment, if the pressure of the cooling water jacket 3 rises, the refractory castable on the inner wall of the reaction furnace cracks, so that the temperature of the outer wall of the reaction furnace rises, the refractory castable on the inner wall of the reaction furnace needs to be checked and the cracks need to be repaired during the stopping and overhauling of the reaction furnace, and at the moment, the steam pipe network check valve 17 with the pressure of 0.5MPa can prevent the steam from flowing back to the cooling water jacket 3; if the temperature of the outer wall of the reaction furnace is more than 150 ℃, the cooling water jacket 3 can produce 0.5MPa steam as a byproduct, if the temperature of the outer wall of the reaction furnace is constant, the flow rate of the low-pressure steam as the byproduct of the cooling water jacket 3 is stable, the cooling water flow meter 16 shows stability, and if the cooling water flow meter 16 shows an upward trend, the refractory castable on the inner wall of the reaction furnace is cracked, so that the heat transfer quantity of the wall of the reaction furnace is increased, and the refractory castable on the inner wall of the reaction furnace needs to be checked and the crack needs to be repaired during the shutdown maintenance of the reaction furnace. If the byproduct of the cooling water jacket 3 is 0.5MPa steam, and the amount of the byproduct of 0.5MPa steam is lower than the minimum flow requirement of the cooling water booster pump 6, the total flow of the cooling water booster pump 6 is controlled by the minimum reflux valve 11 of the cooling water booster pump to be equal to the minimum flow of the cooling water booster pump 6. When the byproduct steam amount is more than or equal to the minimum flow requirement of the cooling water booster pump 6, the minimum return valve 11 of the cooling water booster pump is automatically closed.
When the reaction furnace is stopped for maintenance, the water stored in the cooling water jacket 3 can be drained through the water discharge valve 15 of the water jacket.
The above description is given for clarity of explanation, and not limitation of the embodiments of the present application. All obvious variations and modifications of the present invention are within the scope of the present invention.
Claims (9)
1. The utility model provides a high temperature reaction furnace outer wall temperature monitoring and controlling means which characterized in that: the reaction furnace comprises a cooling water jacket wrapped on the outer wall of the reaction furnace, wherein the cooling water jacket is in a cavity ring shape, a water inlet, a water outlet, an overflow opening and a steam opening are formed in the cooling water jacket, the water inlet is communicated with a cooling water tank through a first pipeline, the water outlet is communicated with a sewage pipeline through a second pipeline, the overflow opening is communicated with the cooling water tank through a third pipeline, and the steam opening is communicated with a steam pipe network through a fourth pipeline; the first pipeline is connected in series with a cooling water booster pump.
2. The apparatus for monitoring and controlling the outer wall temperature of a high temperature reactor as set forth in claim 1, wherein: the cooling water jacket comprises a shell, the shell is a cylinder with a cavity, a water jacket layer is arranged on the outer wall of the ring shell, the inner wall of the water jacket layer is contacted with the outer wall of the high-temperature reaction furnace, and the upper end and the lower end of the inner wall of the water jacket layer extend out of the open ends of the upper end and the lower end of the shell to form limiting heads; the inner wall of the water jacket layer comprises a heat transfer layer and a plurality of limiting elastic sheets which are arranged on the outer surface of the heat transfer layer in sequence.
3. The apparatus for monitoring and controlling the outer wall temperature of a high temperature reactor as set forth in claim 2, wherein: the first pipeline is communicated with a return pipe, the water outlet end of the return pipe is communicated with the interior of the cooling water tank, and the return pipe is provided with a return valve.
4. The apparatus for monitoring and controlling the outer wall temperature of a high temperature reactor according to claim 2, wherein: a flow control valve and a cooling water flowmeter are also connected in series on the first pipeline at the rear side of the cooling water booster pump.
5. The apparatus for monitoring and controlling the outer wall temperature of a high temperature reactor as set forth in claim 2, wherein: a cooling water jacket thermometer, a cooling water jacket liquid level meter and a cooling water jacket pressure gauge are arranged on the side wall of the cooling water jacket.
6. The apparatus for monitoring and controlling the temperature of the outer wall of a high temperature reaction furnace according to claim 1, wherein: the cooling water tank is provided with a fluid infusion port which is communicated with a fluid infusion pipeline and is provided with a desalted water flow control valve.
7. The apparatus for monitoring and controlling the outer wall temperature of a high temperature reactor according to claim 6, wherein: and a cooling water tank liquid level meter is arranged on the side wall of the cooling water tank 7.
8. The apparatus for monitoring and controlling the temperature of the outer wall of a high temperature reaction furnace according to claim 1, wherein: and a water jacket overflow valve is arranged on the third pipeline.
9. The apparatus for monitoring and controlling the temperature of the outer wall of a high temperature reaction furnace according to claim 1, wherein: and a steam pressure control valve and a 0.5MPa steam pipe network check valve are arranged on the fourth pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211500647.1A CN115634640A (en) | 2022-11-29 | 2022-11-29 | Outer wall temperature monitoring and controlling means of high temperature reaction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211500647.1A CN115634640A (en) | 2022-11-29 | 2022-11-29 | Outer wall temperature monitoring and controlling means of high temperature reaction furnace |
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| Publication Number | Publication Date |
|---|---|
| CN115634640A true CN115634640A (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211500647.1A Pending CN115634640A (en) | 2022-11-29 | 2022-11-29 | Outer wall temperature monitoring and controlling means of high temperature reaction furnace |
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| CN (1) | CN115634640A (en) |
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- 2022-11-29 CN CN202211500647.1A patent/CN115634640A/en active Pending
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