CN210057831U - Device for utilizing waste heat of tail gas generated in synthesis of alkylpyridine - Google Patents
Device for utilizing waste heat of tail gas generated in synthesis of alkylpyridine Download PDFInfo
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- CN210057831U CN210057831U CN201920815286.7U CN201920815286U CN210057831U CN 210057831 U CN210057831 U CN 210057831U CN 201920815286 U CN201920815286 U CN 201920815286U CN 210057831 U CN210057831 U CN 210057831U
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Abstract
The utility model provides a device for utilizing waste heat of tail gas generated in the synthesis of alkylpyridine, which comprises a spray absorption tower, wherein the side wall of the lower end of the spray absorption tower is communicated with a waste heat tail gas inlet pipe, and a first regulating valve and a second regulating valve are sequentially arranged on a hot fluid outlet pipe; a first hot fluid inflow pipe and a first hot fluid outflow pipe which are connected with the first regulating valve are respectively connected with a fluid A inlet and a fluid A outlet of the first heat exchanger, and a fluid B inlet and a fluid B outlet of the first heat exchanger are respectively connected with the bottom end and the lower end side wall of the propionaldehyde evaporator through a propionaldehyde inlet pipe and a propionaldehyde outlet pipe; and a second hot fluid inflow pipe and a second hot fluid outflow pipe of the second regulating valve are respectively connected with a fluid A inlet and a fluid A outlet of the second heat exchanger, and a fluid B inlet and a fluid B outlet of the second heat exchanger are respectively connected with the bottom end and the lower end side wall of the acetaldehyde evaporator through an acetaldehyde inlet pipe and an acetaldehyde outlet pipe. The utility model discloses the circulating water quantity that can not only significantly reduce can also reduce steam consumption, and the waste heat is used for the apparatus for producing utilization rate higher.
Description
Technical Field
The utility model relates to a chemical industry equipment technical field, concretely relates to alkyl pyridine synthesis tail gas waste heat utilization equipment.
Background
Alkyl pyridines such as 2, 3-lutidine, 3, 5-lutidine, 2,3, 5-collidine and the like are key intermediates for synthesizing prazole medicines, currently, a method for synthesizing formaldehyde, acetaldehyde, propionaldehyde and ammonia in a fluidized bed reactor is mostly produced, after the reaction is finished, high-temperature gaseous materials are absorbed by water after heat exchange and temperature reduction, and then a plurality of alkyl pyridine products are obtained by extraction, rectification and separation. The temperature of high-temperature gaseous materials is still high after heat exchange of a boiler or air condensation, the temperature can reach 70-80 ℃ generally after the high-temperature gaseous materials are absorbed by water, circulating water is mostly adopted to cool absorption liquid in the prior art, low-quality waste heat cannot be fully utilized, a large amount of circulating water is consumed, the energy consumption of the separation process is increased, part of processes use the part of waste heat for other facilities, but the waste heat is influenced by production scheduling, and the waste heat utilization rate is not high.
SUMMERY OF THE UTILITY MODEL
The utility model provides a synthetic tail gas waste heat utilization equipment of alkyl pyridine, the device can not only the circulating water quantity that significantly reduces, can also reduce steam consumption, and the waste heat is used for the apparatus for producing utilization rate higher.
In order to achieve the above object, the utility model provides a following technical scheme:
a device for utilizing waste heat of tail gas generated in alkyl pyridine synthesis comprises a spray absorption tower, a propionaldehyde evaporator, an acetaldehyde evaporator, a first heat exchanger and a second heat exchanger, wherein the side wall of the lower end of the spray absorption tower is communicated with a waste heat tail gas inlet pipe, the side wall of the upper end of the spray absorption tower is communicated with a spray water inlet pipe, the bottom end of the spray absorption tower is communicated with a hot fluid outlet pipe, and a first adjusting valve and a second adjusting valve are sequentially arranged on the hot fluid outlet pipe from an inlet end;
the first heat exchanger and the second heat exchanger are respectively provided with a fluid A inlet, a fluid A outlet, a fluid B inlet and a fluid B outlet, the inlet end and the outlet end of the first regulating valve are respectively provided with a first hot fluid inflow pipe and a first hot fluid outflow pipe, the first hot fluid inflow pipe and the first hot fluid outflow pipe are respectively connected with the fluid A inlet and the fluid A outlet of the first heat exchanger, and the fluid B inlet and the fluid B outlet of the first heat exchanger are respectively connected with the bottom end and the lower end side wall of the propionaldehyde evaporator through a propionaldehyde inlet pipe and a propionaldehyde outlet pipe;
and a second hot fluid inflow pipe and a second hot fluid outflow pipe are respectively installed at the inlet end and the outlet end of the second regulating valve, the second hot fluid inflow pipe and the second hot fluid outflow pipe are respectively connected with a fluid A inlet and a fluid A outlet of the second heat exchanger, and a fluid B inlet and a fluid B outlet of the second heat exchanger are respectively connected with the bottom end and the lower end side wall of the acetaldehyde evaporator through an acetaldehyde inlet pipe and an acetaldehyde outlet pipe.
The device further comprises a condenser, wherein the feed end of the condenser is connected with a condenser feed pipe, and the discharge end of the condenser is connected with a condensation discharge pipe; the hot fluid exit tube is connected with the condenser inlet pipe, the condensation discharging pipe is connected with the extraction tower, and the condensation discharging pipe is connected with the spray water inlet pipe through a pipeline.
Furthermore, the top end of the spraying absorption tower is communicated with a tail gas outlet pipe.
Furthermore, the side wall of the middle lower end of the propionaldehyde evaporator is communicated with a propionaldehyde feeding pipe, and the top end of the propionaldehyde evaporator is connected with a propionaldehyde air outlet pipe.
Furthermore, the side wall of the middle lower end of the acetaldehyde evaporator is communicated with an acetaldehyde feeding pipe, and the top end of the acetaldehyde evaporator is connected with an acetaldehyde outlet pipe.
The utility model has the advantages that:
the utility model discloses in, gaseous state material after the cooling sprays with the absorption liquid circulation through spraying the absorption tower and turns into liquid waste heat carrier with gaseous state waste heat carrier, guarantees the absorption liquid concentration through continuous high concentration alkyl pyridine solution of winning and supplementary fresh water. The liquid waste heat carrier is used for vaporizing raw materials of propionaldehyde and acetaldehyde, and the liquid waste heat carrier flow is controlled by a regulating valve to control the evaporation amount of propionaldehyde. And continuously extracting the absorption liquid after the waste heat utilization twice to an extraction tower to separate alkyl pyridine products, and partially circulating the absorption liquid to a spray tower to be mixed with fresh water to be used as the absorption liquid. The utility model discloses a spray column turns into gaseous state waste heat carrier liquid state and preheats the carrier, utilizes characteristics that propionaldehyde and acetaldehyde boiling point are low, carries out 2 utilization to the waste heat.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a partial structure of the present invention;
in the figure: 1. spraying an absorption tower; 11. a waste heat tail gas inlet pipe; 12. a spray water inlet pipe; 13. a tail gas outlet pipe; 2. a propionaldehyde evaporator; 21. propionaldehyde enters the pipe; 22. a propionaldehyde outlet pipe; 23. propionaldehyde feed pipe; 24. a propionaldehyde outlet pipe; 3. an acetaldehyde evaporator; 31. feeding acetaldehyde into a pipe; 32. an acetaldehyde outlet pipe; 33. an acetaldehyde feed pipe; 34. an acetaldehyde outlet pipe; 4. a first heat exchanger; 5. a second heat exchanger; 6. a hot fluid outlet pipe; 61. adjusting a valve I; 62. a second regulating valve; 63. a hot fluid inflow pipe I; 64. a first hot fluid outlet pipe; 65. a hot fluid inflow pipe II; 66. a second hot fluid outlet pipe; 7. a condenser; 71. condensing a discharge pipe; 72. and (4) condensing a discharge pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-2, a device for utilizing waste heat of tail gas from alkyl pyridine synthesis comprises a spray absorption tower 1, a propionaldehyde evaporator 2, an acetaldehyde evaporator 3, a first heat exchanger 4, a second heat exchanger 5 and a condenser 7, wherein the side wall of the lower end of the spray absorption tower 1 is communicated with a waste heat tail gas inlet pipe 11, the side wall of the upper end of the spray absorption tower 1 is communicated with a spray water inlet pipe 12, and the top end of the spray absorption tower is communicated with a tail gas outlet pipe 13; the bottom end of the spray absorption tower 1 is communicated with a hot fluid outlet pipe 6, and a first adjusting valve 61 and a second adjusting valve 62 are sequentially arranged on the hot fluid outlet pipe 6 from the inlet end to the outlet end.
The first heat exchanger 4 and the second heat exchanger 5 are respectively provided with a fluid A inlet, a fluid A outlet, a fluid B inlet and a fluid B outlet, the inlet end and the outlet end of the first adjusting valve 61 are respectively provided with a first hot fluid inflow pipe 63 and a first hot fluid outflow pipe 64, the first hot fluid inflow pipe 63 and the first hot fluid outflow pipe 64 are respectively connected with the fluid A inlet and the fluid A outlet of the first heat exchanger 4, and the fluid B inlet and the fluid B outlet of the first heat exchanger 4 are respectively connected with the bottom end and the lower end side wall of the propionaldehyde evaporator 2 through the propionaldehyde inlet pipe 21 and the propionaldehyde outlet pipe 22.
The inlet end and the outlet end of the second regulating valve 62 are respectively provided with a second hot fluid inflow pipe 65 and a second hot fluid outflow pipe 66, the second hot fluid inflow pipe 65 and the second hot fluid outflow pipe 66 are respectively connected with the fluid A inlet and the fluid A outlet of the second heat exchanger 5, and the fluid B inlet and the fluid B outlet of the second heat exchanger 5 are respectively connected with the bottom end and the lower end side wall of the acetaldehyde evaporator 3 through the acetaldehyde inlet pipe 31 and the acetaldehyde outlet pipe 32. The side wall of the middle lower end of the propionaldehyde evaporator 2 is communicated with a propionaldehyde feeding pipe 23, and the top end is connected with a propionaldehyde outlet pipe 24.
The feed end of the condenser 7 is connected with a condenser feed pipe 71, and the discharge end is connected with a condensation discharge pipe 72; the hot fluid outlet pipe 6 is connected with a condenser inlet pipe 71, a condensation outlet pipe 72 is connected with an extraction tower (not shown in the figure), and the condensation outlet pipe 72 is connected with a spray water inlet pipe 12 through a pipeline. The side wall of the middle lower end of the acetaldehyde evaporator 3 is communicated with an acetaldehyde feeding pipe 33, and the top end is connected with an acetaldehyde outlet pipe 34.
The utility model discloses in, waste heat tail gas obtains the alkyl pyridine aqueous solution through the absorption in spraying absorption tower 1, and tail gas gets into the tail gas processing system through tail gas outlet duct 13. After being mixed with fresh water, the low-temperature absorption liquid absorbs alkylpyridine products and heat in the waste heat tail gas in the spray absorption tower 1, and a distributor or a filler and the like are arranged in the spray absorption tower 1 to ensure that the gas and the liquid are uniformly mixed. One part of the saturated alkylpyridine aqueous solution absorbed at the bottom of the spray absorption tower 1 is used for vaporizing propionaldehyde, the other part of the saturated alkylpyridine aqueous solution is directly used for vaporizing acetaldehyde, and the flow distribution of the liquid-state waste heat carrier alkylpyridine aqueous solution is controlled by a first adjusting valve 61, so that the vaporization quantity of propionaldehyde is adjusted. And after the liquid waste heat carrier for vaporization heating of propionaldehyde comes out of the heat exchanger I4, the liquid waste heat carrier is mixed with the rest liquid waste heat carrier and is used for vaporization of acetaldehyde, and the evaporation capacity of the acetaldehyde is controlled by the regulating valve II 62. After the temperature of the alkyl pyridine aqueous solution after the waste heat utilization for 2 times is reduced by the condenser 7, one part of the alkyl pyridine aqueous solution is directly extracted to the extraction tower for separation to obtain a plurality of alkyl pyridine products, and the other part of the alkyl pyridine aqueous solution is mixed with fresh water and then enters the spray absorption tower 1 to be used as absorption liquid for recycling.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (5)
1. The device for utilizing the waste heat of the tail gas generated in the synthesis of the alkylpyridine is characterized by comprising a spray absorption tower (1), a propionaldehyde evaporator (2), an acetaldehyde evaporator (3), a first heat exchanger (4) and a second heat exchanger (5), wherein the side wall of the lower end of the spray absorption tower (1) is communicated with a waste heat tail gas inlet pipe (11), the side wall of the upper end of the spray absorption tower is communicated with a spray water inlet pipe (12), the bottom end of the spray absorption tower is communicated with a hot fluid outlet pipe (6), and a first regulating valve (61) and a second regulating valve (62) are sequentially arranged on the hot fluid outlet;
a fluid A inlet, a fluid A outlet, a fluid B inlet and a fluid B outlet are respectively arranged on the first heat exchanger (4) and the second heat exchanger (5), a first hot fluid inflow pipe (63) and a first hot fluid outflow pipe (64) are respectively installed at the inlet end and the outlet end of the first regulating valve (61), the first hot fluid inflow pipe (63) and the first hot fluid outflow pipe (64) are respectively connected with the fluid A inlet and the fluid A outlet of the first heat exchanger (4), and the fluid B inlet and the fluid B outlet of the first heat exchanger (4) are respectively connected with the bottom end and the lower end side wall of the propionaldehyde evaporator (2) through a propionaldehyde inlet pipe (21) and a propionaldehyde outlet pipe (22);
and a second hot fluid inflow pipe (65) and a second hot fluid outflow pipe (66) are respectively installed at the inlet end and the outlet end of the second regulating valve (62), the second hot fluid inflow pipe (65) and the second hot fluid outflow pipe (66) are respectively connected with a fluid A inlet and a fluid A outlet of the second heat exchanger (5), and a fluid B inlet and a fluid B outlet of the second heat exchanger (5) are respectively connected with the bottom end and the lower end side wall of the acetaldehyde evaporator (3) through an acetaldehyde inlet pipe (31) and an acetaldehyde outlet pipe (32).
2. The device for utilizing the waste heat in the tail gas generated in the synthesis of the alkylpyridines according to claim 1, which is characterized by further comprising a condenser (7), wherein the feed end of the condenser (7) is connected with a condenser feed pipe (71), and the discharge end of the condenser (7) is connected with a condensation discharge pipe (72); hot fluid exit tube (6) are connected with condenser inlet pipe (71), condensation discharging pipe (72) are connected with the extraction tower, condensation discharging pipe (72) are connected with spray water inlet tube (12) through the pipeline.
3. The device for utilizing the waste heat in the tail gas generated in the synthesis of the alkyl pyridine according to claim 1, wherein a tail gas outlet pipe (13) is communicated with the top end of the spray absorption tower (1).
4. The device for utilizing the waste heat of the tail gas generated in the synthesis of the alkyl pyridine according to claim 1, wherein the side wall of the middle lower end of the propionaldehyde evaporator (2) is communicated with a propionaldehyde feeding pipe (23), and the top end of the propionaldehyde evaporator is connected with a propionaldehyde gas outlet pipe (24).
5. The device for utilizing the waste heat in the tail gas generated in the synthesis of alkyl pyridine according to claim 1, wherein the side wall of the middle lower end of the acetaldehyde evaporator (3) is communicated with an acetaldehyde feeding pipe (33), and the top end of the acetaldehyde evaporator is connected with an acetaldehyde outlet pipe (34).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920815286.7U CN210057831U (en) | 2019-05-31 | 2019-05-31 | Device for utilizing waste heat of tail gas generated in synthesis of alkylpyridine |
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| CN201920815286.7U CN210057831U (en) | 2019-05-31 | 2019-05-31 | Device for utilizing waste heat of tail gas generated in synthesis of alkylpyridine |
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| CN210057831U true CN210057831U (en) | 2020-02-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113893785A (en) * | 2021-11-22 | 2022-01-07 | 安徽国星生物化学有限公司 | Pyridine base synthesis method and device |
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- 2019-05-31 CN CN201920815286.7U patent/CN210057831U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113893785A (en) * | 2021-11-22 | 2022-01-07 | 安徽国星生物化学有限公司 | Pyridine base synthesis method and device |
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