Organic solvent energy-saving recovery system
By introducing a steam compressor and a condensate tank preheating plate into the two-effect evaporation system, the problem of high energy consumption of the traditional two-effect evaporation system is solved, efficient use of steam and waste heat recovery are achieved, and system energy consumption is reduced.
Patent Information
- Application Number
- CN202422889204.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-26
AI Technical Summary
The traditional two-effect evaporation system requires continuous introduction of high-temperature steam to maintain system operation, resulting in high energy consumption. In addition, the steam temperature decreases step by step and cannot be effectively utilized, resulting in high system energy consumption.
The first-effect evaporator and the second-effect evaporator are connected to the steam compressor. The steam generated by the second-effect evaporator is heated by the steam compressor and then sent back to the first-effect evaporator. The waste heat is recovered by combining the condensate tank and the preheating plate to reduce the use of external high-temperature steam.
It reduces the system energy consumption by 30%, realizes the efficient use of steam and waste heat recovery, and improves the energy efficiency of the system.
Smart Images
Figure CN223439175U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to evaporator technical field, concretely relates to an organic solvent energy -conserving recovery system. BACKGROUND
[0002] Two -effect evaporation is the evaporation operation of two evaporators in series, the steam generated by the first -effect evaporator is supplied to the second -effect evaporator for use, so that the steam heat energy is used multiple times, thereby improving the heat energy utilization rate. Two -effect evaporation requires that the azeotropic points of the two kinds of solvents and water all have a large temperature difference, so that the temperature difference between the effects can be maintained to ensure the process under the series condition.
[0003] And in the two -effect evaporation process, the temperature of steam is gradually reduced, the two -effect steam produced by the two -effect evaporator of the traditional two -effect evaporation system cannot be used, and high -temperature steam needs to be continuously introduced into the system to maintain the normal operation of the system, which makes the whole system need larger energy consumption, and the use is inconvenient. UTILITY MODEL CONTENT
[0004] The utility model aims at providing an organic solvent energy -conserving recovery system to solve the problems of the existing two -effect evaporator in the use process in the above background art.
[0005] In order to realize the above -mentioned purpose, the utility model provides the following technical scheme: an organic solvent energy -conserving recovery system, including one -effect evaporation system, two -effect evaporation system and steam compressor, the one -effect evaporation system includes one -effect evaporator, one -effect circulating pump, one -effect condensate tank and one -effect condensate pump, the one -effect circulating pump is connected with circulating feed pipe and circulating discharge pipe and is communicated with the first -effect evaporator through circulating feed pipe and circulating discharge pipe, the one -effect condensate tank is connected with the condensate port of one -effect evaporator, and one -effect condensate pump is arranged at one end of the one -effect condensate tank;
[0006] The two -effect evaporation system includes two -effect evaporator, two -effect circulating pump, two -effect condensate tank and two -effect condensate pump, the steam outlet of two -effect evaporator is connected with steam compressor, and the air outlet end of steam compressor is communicated with the steam inlet of one -effect evaporator.
[0007] Preferably, the steam inlet of the one -effect evaporator is also connected with an external steam inlet.
[0008] Preferably, the one -effect condensate tank is connected with the first -effect preheating plate, and the two -effect condensate tank is connected with the second -effect preheating plate.
[0009] Preferably, the one -effect evaporator and two -effect evaporator are both selected from vertical tube falling film evaporators.
[0010] Preferably, the concentration detector is connected to the discharge unit of the one -effect evaporator and two -effect evaporator.
[0011] Compared with the prior art, the utility model has the advantages of:
[0012] Through the steam compressor, the two-effect evaporation is sent back to the primary evaporator after being warmed up, so that the evaporation is maintained, compared with the traditional two-effect evaporator system, the scheme only needs to pass in the external high heat steam in the initial stage of the reaction, uses the two-effect steam compression cycle in the maintenance stage, and is lower in energy consumption;The one-effect condensate and the two-effect condensate are discharged and are heat-exchanged with the preheating plate, and are used for preheating the added solvent, so that waste heat recovery is realized, thereby reducing system energy consumption, and the use effect is better. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of the utility model.
[0014] In the drawing: 1, one-effect evaporator;2, one-effect circulating pump;3, one-effect condensate tank;4, one-effect condensate pump;5, primary preheating plate;6, external steam inlet;7, two-effect evaporator;8, two-effect condensate tank;9, two-effect circulating pump;10, two-effect condensate pump;11, secondary preheating plate;12, steam compressor. DETAILED DESCRIPTION
[0015] The technical scheme in the embodiments of the utility model will be apparently and completely described below in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range protected by the utility model.
[0016] Reference Figure 1 An organic solvent energy-saving recovery system, including one-effect evaporation system, two-effect evaporation system and steam compressor 12, one-effect evaporation system includes one-effect evaporator 1, one-effect circulating pump 2, one-effect condensate tank 3 and one-effect condensate pump 4, one-effect circulating pump 2 is connected with circulating feed pipe and circulating discharge pipe and is communicated with primary evaporator through circulating feed pipe and circulating discharge pipe, one-effect condensate tank 3 is connected with the condensate port of one-effect evaporator 1, one end of one-effect condensate tank 3 is provided with one-effect condensate pump 4;
[0017] Two-effect evaporation system includes two-effect evaporator 7, two-effect circulating pump 9, two-effect condensate tank 8 and two-effect condensate pump 10, the steam outlet of two-effect evaporator 7 is connected with steam compressor 12, and the air outlet end of steam compressor 12 is communicated with the steam inlet of one-effect evaporator 1.
[0018] In view of the problems of large heat loss, high energy consumption and complex structure of the existing double-effect evaporation equipment, the technical scheme provides a double-effect evaporation energy-saving recovery system for organic solvents, which comprises a primary evaporation system and a secondary evaporation system, and each of the primary evaporation system and the secondary evaporation system comprises an evaporator, a circulating pump, a condensate tank and a condensate pump; a primary evaporator 1 and a secondary evaporator 7 are respectively added with A solvent and B solvent, wherein the primary evaporator 1 heats the A solvent to evaporation temperature, and the primary steam generated in the process is sent into the secondary evaporator 7 to heat the B solvent in the secondary evaporator 7 to evaporation temperature; the secondary steam generated in the evaporation process of the secondary evaporator 7 is sent into a steam compressor 12, and after being heated by the steam compressor 12, the secondary steam is sent back into the primary evaporator 1 to maintain the evaporation of the primary evaporator 1; in the primary evaporation system and the secondary evaporation system, the circulating pump is used to circulate the solvent in the evaporator, so as to gradually concentrate, and the condensate tank is used to collect the condensate of the steam, and the condensate is sent out through the condensate pump.
[0019] In the system, only high-temperature steam is introduced in the initial stage of the reaction to heat the heater of the primary evaporator 1 to the evaporation temperature, and the subsequent steam is heated by the steam compressor 12, the energy in the system is converted into the electric energy of the steam compressor 12, and the overall energy consumption is reduced by 30%, so that the system has better energy-saving effect.
[0020] Further, the steam inlet of the primary evaporator 1 is also connected with an external steam inlet 6.
[0021] The external steam inlet 6 is used to connect and send high-temperature steam into the primary evaporator 1, and the external steam is only introduced in the preparation stage of the system, and after the solvent in the primary evaporator 1 is heated to the evaporation temperature, the system is stable, and the external steam is not introduced any more.
[0022] Further, the primary condensate tank 3 is connected with a first preheating plate 5, and the secondary condensate tank 8 is connected with a second preheating plate 11.
[0023] The condensate generated by the primary condensate tank 3 and the secondary condensate tank 8 respectively carries the residual heat in the primary evaporator 1 and the secondary evaporator 7, and the condensate generated by the primary condensate tank 3 and the secondary condensate tank 8 is heat-exchanged with the first preheating plate 5 and the second preheating plate 11, so that the energy consumption of the preheating mechanism can be reduced; in the scheme, the A solvent and the B solvent need to be heat-exchanged by the preheating mechanism when being sent into the evaporator, so that the heat recovery of the system is actually realized when the A solvent and the B solvent are preheated, and the energy consumption in the system can be effectively reduced.
[0024] Further, the primary evaporator 1 and the secondary evaporator 7 are vertical tube falling film evaporators.
[0025] Further, the concentration detector is connected to the discharge units of the first evaporator 1 and the second evaporator 7.
[0026] By the technical scheme, the concentration detector is used to control the discharge when the solvent reaches the concentration.
[0027] Working principle: when the system works, firstly, the solvent A and the solvent B are preheated in the preheating mechanism and then are added into the first evaporator 1 and the second evaporator 7; secondly, the external steam inlet 6 is used to send the external high-temperature steam into the heater of the first evaporator 1, so that the A solvent in the first evaporator 1 is heated to the evaporation temperature; thirdly, the A solvent is circulated and evaporated in the first evaporator 1, the first steam generated in the first evaporator 1 is sent into the second evaporator 7, and the first steam is used to heat the B solvent in the second evaporator 7 to the evaporation temperature; fourthly, the B solvent is circulated and evaporated in the second evaporator 7, the second steam generated in the second evaporator 7 is sent into the steam compressor 12, is compressed and heated by the steam compressor 12, and then is sent back into the heater of the first evaporator; finally, the heated second steam maintains the evaporation problem in the first evaporator, the external high-temperature steam stops being sent in, the continuously generated first steam is sent into the second evaporator, and the circulation is formed, and in the process, the solvent A and the solvent B are discharged after reaching the set concentration, and new solvent A and solvent B are sent into the system at the same time.
[0028] In the description of the present application, the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0029] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the different embodiments or examples described in the present application and the features of the different embodiments or examples can be combined by those skilled in the art without contradiction.
[0030] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An organic solvent energy-saving recovery system, characterized by: It includes a first-effect evaporation system, a second-effect evaporation system and a steam compressor, the first-effect evaporation system includes a first-effect evaporator, a first-effect circulation pump, a first-effect condensate tank and a first-effect condensate pump, the first-effect circulation pump is connected to a circulation feed pipe and a circulation discharge pipe and is connected to the primary evaporator through the circulation feed pipe and the circulation discharge pipe, the first-effect condensate tank is connected to the condensate outlet of the first-effect evaporator, and one end of the first-effect condensate tank is provided with a first-effect condensate pump; The second-effect evaporation system includes a second-effect evaporator, a second-effect circulation pump, a second-effect condensate tank and a second-effect condensate pump. The steam outlet of the second-effect evaporator is connected to a steam compressor, and the gas outlet of the steam compressor is connected to the steam inlet of the first-effect evaporator.
2. The organic solvent energy-saving recovery system according to claim 1, characterized in that: The steam inlet of the first-effect evaporator is further connected to an external steam inlet.
3. The organic solvent energy-saving recovery system according to claim 1, characterized in that: The first-effect condensate tank is connected to a first-level preheating plate, and the second-effect condensate tank is connected to a second-level preheating plate.
4. The organic solvent energy-saving recovery system according to claim 1, characterized in that: The first-effect evaporator and the second-effect evaporator are both vertical tube falling film evaporators.
5. The organic solvent energy-saving recovery system according to claim 1, characterized in that: The discharge units of the first-effect evaporator and the second-effect evaporator are connected with concentration detectors.