CN216159012U - Waste heat utilization equipment of formaldehyde production - Google Patents
Waste heat utilization equipment of formaldehyde production Download PDFInfo
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- CN216159012U CN216159012U CN202122111518.0U CN202122111518U CN216159012U CN 216159012 U CN216159012 U CN 216159012U CN 202122111518 U CN202122111518 U CN 202122111518U CN 216159012 U CN216159012 U CN 216159012U
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Abstract
The utility model provides a waste heat utilization device for formaldehyde production, which comprises an integrated evaporator, a high-efficiency flame arrester, a hot water tank, a hot water circulating pump, a soft water replenishing pump, an oxidizer, a soft water tank and a steam distribution table, wherein two water tanks are arranged, namely the hot water tank and the soft water tank respectively; and one part of hot water in the soft water tank is used as water supplement of the waste heat boiler section of the oxidizer, the other part of the hot water is used as water supplement of the tail boiler, steam generated by the steam drum of the oxidizer and one part of the steam are used as ingredient steam and superheated steam to return to the integrated evaporator for heating, and the redundant part of low-pressure steam is mixed with the hot water in the soft water tank for heating, so that the consumption of cooling water is reduced while the gas production rate of the tail gas boiler is increased.
Description
The technical field is as follows:
the utility model belongs to the field of energy-saving production, and particularly relates to a waste heat utilization device for formaldehyde production.
Background art:
the industrial formaldehyde production is obtained by oxidizing formaldehyde under the action of a catalyst, in the formaldehyde production process, a large amount of steam is consumed by evaporation of methanol, steam distribution and heating of process gas and the like, on the other hand, the methanol oxidation is an exothermic reaction and can generate a large amount of reaction heat, a waste heat boiler using high-temperature gas as a heat source is adopted in the traditional process, the high-temperature gas at 600 ℃ generated by the methanol oxidation is used for heating soft water in a boiler shell to form low-pressure steam at 0.2-0.3 Mpa, the generated low-pressure steam is used for the evaporation of the methanol, the steam distribution of the process gas and the like, the process gas is cooled to below 100 ℃ from 600 ℃ and then enters an absorption tower to be absorbed (or the process gas at 200 ℃ directly enters the absorption tower to be absorbed, and the absorbed high-temperature absorption liquid continues to exchange heat with cooling water). In the original process, the surplus low-pressure steam cannot be reasonably utilized, and the heat of the process gas at the temperature of 200 ℃ is cooled by cooling water, so that the heat is wasted, the consumption of the cooling water is increased, the reaction heat in the formaldehyde production process needs to be reasonably utilized, and a formaldehyde production device is more economical and energy-saving.
The utility model has the following contents:
the utility model provides a waste heat utilization device for formaldehyde production, which utilizes the heat of process gas at 200 ℃ in a waste heat section of an oxidizer for formaldehyde production by arranging a soft water tank and a hot water tank, and realizes waste heat utilization, wherein the technical scheme of the utility model is as follows:
a waste heat utilization device for formaldehyde production comprises an integrated evaporator, a high-efficiency flame arrester, a hot water tank, a hot water circulating pump, a soft water replenishing pump, an oxidizer, a soft water tank and a steam distribution table, wherein the high-efficiency flame arrester is arranged at the upper part of the oxidizer, the high-efficiency flame arrester is connected with the upper part of the integrated evaporator through a pipeline, and the lower part of the oxidizer is connected with the lower part of the integrated evaporator through a pipeline; the upper part of the oxidizer is connected with the steam distribution table through a pipeline, the middle part of the oxidizer is connected with a soft water replenishing pump through a pipeline, and the lower part of the oxidizer is respectively connected with a soft water tank and a hot water tank through pipelines.
Preferably, the lower part of the integrated evaporator is connected with a hot water circulating pump through a pipeline, and the hot water circulating pump is connected with a hot water tank through a pipeline.
Preferably, the soft water tank passes through the pipe connection with soft water moisturizing pump, the soft water tank passes through the pipe connection with the steam distribution platform.
Preferably, the hot water tank is provided with a constant-temperature water supplementing system, and the soft water tank is provided with a constant-liquid-level water supplementing system.
The utility model has the advantages that:
1. the heat of the process gas at 200 ℃ in the waste heat section of the oxidizer is fully utilized, and the part of heat is transferred to the soft water tank, so that the water temperature in the soft water tank is improved, and the gas yield of the tail gas boiler is increased.
2. The process gas at 200 ℃ in the waste heat section of the oxidizer is cooled by using circulating hot water instead of outdoor cooling water, so that the consumption of cooling water is greatly reduced.
3. The excessive low-pressure waste heat steam discharged in the traditional process is collected and heated to further improve the temperature of the hot water in the soft water tank and increase the gas production of the tail gas boiler.
The process principle is as follows:
the utility model improves the utilization process of waste heat in the production process of formaldehyde, the process is provided with two water tanks, namely a hot water tank and a soft water tank, hot water in the hot water tank is contacted with methanol and air in a bubbling section in an integrated evaporator, heat exchange is continuously carried out with process gas at 200 ℃ in a waste heat section of an oxidizer, part of hot water after heat exchange returns to the hot water tank for circulation, and part of hot water returns to the soft water tank; and one part of hot water in the soft water tank is used as water supplement of the waste heat boiler section of the oxidizer, the other part of the hot water is used as water supplement of the tail boiler, steam generated by the steam drum of the oxidizer and one part of the steam are used as ingredient steam and superheated steam to return to the integrated evaporator for heating, and the redundant part of low-pressure steam is heated and mixed with the hot water in the soft water tank.
Description of the drawings:
FIG. 1 is a schematic structural diagram of a waste heat utilization device for formaldehyde production;
in the figure: 1-integrated evaporator, 2-hot water tank, 3-hot water circulating pump, 4-high efficiency flame arrester, 5-oxidizer, 6-steam distribution table, 7-soft water tank and 8-soft water replenishing pump.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
the utility model provides a waste heat utilization equipment of formaldehyde production, includes integral type evaporimeter 1, high-efficient spark arrester 4, hot water tank 2, hot water circulating pump 3, soft water moisturizing pump 8, oxidizer 5, soft water tank 7 and steam distribution platform 6, oxidizer 5 upper portions set up high-efficient spark arrester 4, high-efficient spark arrester 4 passes through the pipe connection with 1 upper portion of integral type evaporimeter, 5 lower parts of oxidizer pass through the pipe connection with 1 lower part of integral type evaporimeter, 5 upper portions of oxidizer pass through the pipeline and are connected with steam distribution platform 6, 5 middle parts of oxidizer pass through the pipeline and are connected with soft water moisturizing pump 8, 5 lower parts of oxidizer pass through the pipeline and are connected with soft water tank 7 and hot water tank 2 respectively.
The lower part of the integrated evaporator 1 is connected with a hot water circulating pump 3 through a pipeline, and the hot water circulating pump 3 is connected with a hot water tank 2 through a pipeline.
The soft water tank 7 is connected with the soft water replenishing pump 8 through a pipeline, and the soft water tank 7 is connected with the steam distribution table 6 through a pipeline.
The hot water tank 2 is provided with a constant-temperature water supplementing system, and the soft water tank 7 is provided with a constant-liquid-level water supplementing system.
Operation example:
as shown in figure 1, the waste heat utilization device for formaldehyde production comprises: hot water in the hot water tank 2 is sent into a tube array section in the integrated evaporator 1 through the hot water circulating pump 2 to heat bubbling air and methanol, the heat-exchanged hot water continuously enters the tube array section at the lower part of the oxidizer 2, the cooling hot water and the process gas flow in a countercurrent mode, the process gas can be cooled from 200 ℃ to 80 ℃, one part of the heat-exchanged hot water returns to the hot water tank 2, and the other part of the heat-exchanged hot water enters the soft water tank 7.
A part of soft water in the soft water tank 2 is supplemented to a waste heat boiler section in the oxidizer 2 through a soft water supplementing pump, low-pressure steam of 0.2-0.25 Mpa is generated by heat exchange with high-temperature gas at 600 ℃ generated by formaldehyde oxidation, the generated low-pressure steam is partially recycled as the formaldehyde production blending steam, and the generated low-pressure steam is partially used as superheated steam of three-way gas in the integrated evaporator, and redundant steam is low in pressure and low in quality and cannot be treated in the traditional process and can only be discharged outside. The other part of the soft water in the soft water tank 2 is supplemented to the tail gas boiler to generate steam through a soft water supplementing pump 8.
According to the utility model, waste heat in the formaldehyde production process is collected into the soft water tank 2, and part of heat is transferred to the tail gas boiler, so that the yield of high-quality steam of the tail gas boiler is greatly improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (4)
1. The utility model provides a waste heat utilization equipment of formaldehyde production, includes integral type evaporimeter, high-efficient spark arrester, hot-water tank, hot water circulating pump, soft water make-up pump, oxidizer, soft water tank and steam distribution platform, its characterized in that: the upper part of the oxidizer is provided with a high-efficiency flame arrester, the high-efficiency flame arrester is connected with the upper part of the integrated evaporator through a pipeline, and the lower part of the oxidizer is connected with the lower part of the integrated evaporator through a pipeline; the upper part of the oxidizer is connected with the steam distribution table through a pipeline, the middle part of the oxidizer is connected with a soft water replenishing pump through a pipeline, and the lower part of the oxidizer is respectively connected with a soft water tank and a hot water tank through pipelines.
2. The waste heat utilization device for formaldehyde production according to claim 1, characterized in that: the lower part of the integrated evaporator is connected with a hot water circulating pump through a pipeline, and the hot water circulating pump is connected with a hot water tank through a pipeline.
3. The waste heat utilization device for formaldehyde production according to claim 1, characterized in that: the soft water tank is connected with the soft water replenishing pump through a pipeline, and the soft water tank is connected with the steam distribution table through a pipeline.
4. The waste heat utilization device for formaldehyde production according to claim 3, characterized in that: the hot water tank is provided with a constant-temperature water supplementing system, and the soft water tank is provided with a constant-liquid-level water supplementing system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122111518.0U CN216159012U (en) | 2021-09-02 | 2021-09-02 | Waste heat utilization equipment of formaldehyde production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122111518.0U CN216159012U (en) | 2021-09-02 | 2021-09-02 | Waste heat utilization equipment of formaldehyde production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216159012U true CN216159012U (en) | 2022-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122111518.0U Active CN216159012U (en) | 2021-09-02 | 2021-09-02 | Waste heat utilization equipment of formaldehyde production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216159012U (en) |
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2021
- 2021-09-02 CN CN202122111518.0U patent/CN216159012U/en active Active
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