CN203170181U - Novel thermal energy recovery system for desorption tail gas of adsorption tank - Google Patents
Novel thermal energy recovery system for desorption tail gas of adsorption tank Download PDFInfo
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- CN203170181U CN203170181U CN 201320013533 CN201320013533U CN203170181U CN 203170181 U CN203170181 U CN 203170181U CN 201320013533 CN201320013533 CN 201320013533 CN 201320013533 U CN201320013533 U CN 201320013533U CN 203170181 U CN203170181 U CN 203170181U
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- adsorption tanks
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- desorption
- recovery system
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Abstract
The utility model relates to a novel thermal energy recovery system for desorption tail gas of an adsorption tank. The system is composed of a rectification dehydrating tower, a dilute solvent collection tank, a cooler, a heat pump and adsorption tanks, wherein process gas including solvents is connected with the inlets of the top of the adsorption tanks through a process gas conveying blower and a pipeline; a desorption gas outlet of the top of one of the adsorption tanks is connected with the inlet of the heat pump; a flash steam inlet of the heat pump is connected with an gas inlet in the bottom of one of the adsorption tanks; a make-up water inlet of the heat pump is connected with a process waste water pump outlet pipeline at the bottom of the rectification dehydrating tower; the circulating cooling water inlet and outlet is connected with a corresponding cooling water pipeline; the process gas outlet of the heat pump is connected with a dilute solvent collection tank through the cooler and the pipeline; and the dilute solvent collection tank is connected with the feed port of the rectification dehydrating tower through the pump and a pipeline flow control valve. According to the novel thermal energy recovery system, the heat pump is adopted to recycle waste heat of desorption gas of the adsorption tanks, so that low-pressure steam of 0.3 MPa is generated, and can replace part of desorption steam; the desorption steam, and the use of the cooling water are reduced; and the energy consumption for production is greatly reduced.
Description
Technical field
The utility model relates to a kind of novel adsorption tanks desorb exhaust heat-energy recovery system.
Background technology
At chemical industry, paint in the chemical fibre production process, can be used low boiling point solvent (as: acetone, chloroform, ether).In order to guarantee production safety and operator's health, in time the gas in device interior or the factory building to be extracted out and sent into adsorption tanks, pass adsorbent bedly from top to bottom, the solvent in the gas is adsorbed, then emptying or send factory building back to of cleaned air passes.After adsorbents adsorb is saturated, earlier adsorption tanks are switched from adsorption process, purge adsorption bed from bottom to top with low-pressure steam again, oppositely purge heating, reach and allow solvent be heated to volatilize the purpose of desorb.
Solvent is heated and evaporates from adsorbent, and leaves adsorption tanks with water vapour, collects after subcooler is condensed into liquid in the weak solution jar, and the rectifying column of making a gift to someone again dehydration is reclaimed and obtained high-purity solvent.Up to 105 ~ 130 ℃, a large amount of gaseous state latent heat are arranged wherein at the middle and later periods of desorb exhaust temperature, cooling water amount is bigger.This technology exists stripping vapor and the big shortcoming of cooling water consumption, and in the technique waste water of rectifying column discharge, contains a small amount of solvent.
Summary of the invention
The purpose of this utility model is to provide a kind of novel adsorption tanks desorb exhaust heat-energy recovery system.
The novel adsorption tanks desorb exhaust heat-energy recovery system that the utility model proposes, by rectifying and dewatering tower 1, rare solvent collection jar 2, cooler 3, heat pump 4, process gas conveying fan 5 and adsorption tanks 6 are formed, wherein: contain solvent gas and be connected adsorption tanks 6 top entrances with pipeline and valve by process gas conveying fan 5, the stripping gas outlet at adsorption tanks top connects the heat pump entrance by pipeline and valve, the indirect steam outlet of heat pump 4 is connected the air intake of adsorption tanks 6 bottoms with valve by pipeline, the stripping gas outlet of adsorption tanks 6 connects heat pump 4, the supplementing water import of heat pump 4 links to each other with the technique waste water pump discharge pipeline of rectifying and dewatering tower 1 bottom, and the recirculated cooling water gateway of heat pump 4 links to each other with corresponding cooling water pipeline; Heat pump 4 gas vents are connected rare solvent collection jar 2 by cooler 3 with pipeline, rare solvent collection jar 2 is connected rectifying and dewatering tower 1 charging aperture by pipeline with valve.
In the utility model, described adsorption tanks 6 are the 4-6 platform, and adjacent adsorption tanks 6 are connected in parallel, and cycle alternation uses.
The course of work of the present utility model is as follows:
1) blower and pipeline is extracted the solvent gas that contains in workshop factory building or the equipment out, the adsorption tanks of making a gift to someone after the supercharging, gas is worn adsorbent bed in the adsorption tanks from top to bottom, and solvent is adsorbed in the adsorbent space of molecular sieve active carbon and so on, cleaned air passes emptying or send factory building back to; Adsorption tanks have 4 ~ 6, wherein have one to be in the desorb operating mode, and other several are in absorption working condition, recycle;
2) adsorbent saturated after, these adsorption tanks stop adsorption operations, enter the desorb operating mode.The low pressure stripping vapor is fed adsorption tanks from the adsorption tanks bottom, and steam passes adsorption tanks from bottom to top, adds heat-adsorbent to more than the solvent boiling point, makes the solvent evaporates that is adsorbed, and reaches the effect of desorb;
3) gaseous solvent and steam leave adsorption tanks together, enter the heat absorption jar of heat pump;
4) saturated vapor below 150 ℃ can take place in heat pump in evaporator, and water can replenish deaerated water in the evaporator, also can use the process for purifying waste water at the bottom of the dehydrating tower, and this technique waste water is the condensate water of stripping vapor, only contains the solvent of PPm level;
Temperature had dropped to about 70 ℃ when 5) process gas left heat pump, and after subcooler was cooled to below 30 ℃, solvent and steam condensate were collected in rare solvent tank together again; Send into the dehydration rectifying column again and carry out distillation operation, return tank of top of the tower obtains high-purity solvent, and tower bottom technique waste water is discharged;
6) indirect steam of heat pump generation mixes the back with stripping vapor and feeds the adsorption tanks bottom, and the amount that the consumption of desorb vapour produces with indirect steam increases and reduces, and keeps the adsorption tanks bottom pressure and stablizes;
7) after desorb finishes, stop explaining and inhale steam, at this moment, another adsorption tanks begin the desorb operation, and the indirect steam that produce this moment then is used for this jar desorb;
8) adsorption tanks after parsing finishes are changeed back absorption working condition again;
9) 1 ~ 2 cover adsorption system, configuration one cover heat pump gets final product.
The beneficial effects of the utility model are:
1) adopts second generation heat pump techniques, utilize the desorb using waste heat from tail gas, the steam about 0.3MPa takes place, substitute the part stripping vapor, also saved a large amount of cooling waters simultaneously.
2) with the technique waste water that will efflux at the bottom of the solvent dehydration tower steam taking place, has reduced the wastewater disposition amount.
The utility model can be used for painting, the low boiling point solvent of chemical fibre, chemical engineering industry reclaims technique unit, reclaim in the steam desorption process of solvent method in absorption, utilization is low warm, removes to take place low-pressure steam again, substitute the part stripping vapor, thereby reach the purpose of energy-conserving and environment-protective.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Number in the figure: 1 is the rectifying and dewatering tower, and 2 is rare solvent collection jar, and 3 is cooler, and 4 is heat pump, and 5 is the process gas conveying fan, and 6 is adsorption tanks, 7 indirect steams for the heat pump generation.
The specific embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: as shown in Figure 1, native system comprises weak solution collecting tank 2, heat pump 4, adsorption tanks 6, rectifying and dewatering tower 1, cooler 3, and wherein: heat pump logistics interface comprises: 1) high-temperature technology medium inlet and the processing medium outlet of cooling back; 2) recirculated cooling water entry and exit; 3) technique waste water (or deaerated water) entrance; 4) the indirect steam outlet of heat pump generation.Stripping vapor is connected adsorption tanks 6 bottom air intakes by pipeline with valve, the stripping gas outlet of adsorption tanks 6 connects heat pump entrance 4.The supplementing water of heat pump 4 links to each other with rectifying and dewatering tower 1 bottom technique waste water pump outlet line.The recirculated cooling water gateway of heat pump 4 links to each other for the return pipe line with corresponding cooling water.
Reclaiming acetone solvent with certain acetate fiber factory is example:
Rectifying and dewatering tower 1: 1.0 meters of tower diameters, 35 meters of tower heights, the number of plates: 40 layers, charging aperture position: count the 16th layer from bottom to top; Handle rare solvent ability: 15t/h;
Rare solvent collection jar 2: material 16MnR, 60 cubic metres of volumes;
Cooler 3 adopts 2 of tubular heat exchangers, 400 square metres of heat exchange areas, and gas is walked shell side, and cooling water is walked tube side;
Heat pump 4: indirect steam generating ability 8t/h;
Process gas conveying fan 5:6 platform, 5 to open a received shipment capable, the acetone blower fan adopts 75 " x7-3/16 " the BR1216 model, the necessary electromotor of acetone blower fan adopts the YB450M1-4W model; 6 of the horizontal tanks of adsorption tanks 6:30 cubic meter are adorned 20 cubic metres of acticarbons in every, by the PLC logical program, control that 6 jars adsorb, the switch of each valve during the desorb operation; The indirect steam 7 that heat pump takes place, maximum instantaneous amount 8t/h, minimum instantaneous flow 0t/h.
Above-mentioned parts are connected by mode shown in Figure 1, and these those skilled in the art all can smooth implementation.
Claims (2)
1. novel adsorption tanks desorb exhaust heat-energy recovery system, by rectifying and dewatering tower (1), rare solvent collection jar (2), cooler (3), heat pump (4), process gas conveying fan (5) and adsorption tanks (6) are formed, it is characterized in that: solvent-laden process gas is connected adsorption tanks (6) top entrance by process gas conveying fan (5) with pipeline and valve, the stripping gas outlet at adsorption tanks (6) top connects heat pump (4) entrance by pipeline and valve, the indirect steam outlet of heat pump (4) is connected the air intake of adsorption tanks (6) bottom with valve by pipeline, the stripping gas outlet of adsorption tanks (6) connects heat pump (4), the supplementing water import of heat pump (4) links to each other with the technique waste water pump discharge pipeline of rectifying and dewatering tower (1) bottom, and the recirculated cooling water gateway of heat pump (4) links to each other with corresponding cooling water pipeline; Heat pump (4) gas vent is connected rare solvent collection jar (2) by cooler (3) with pipeline, rare solvent collection jar (2) is connected rectifying and dewatering tower (1) charging aperture by pipeline with valve.
2. novel adsorption tanks desorb exhaust heat-energy recovery system according to claim 1 is characterized in that described adsorption tanks (6) are the 4-6 platform, and adjacent adsorption tanks (6) are connected in parallel, and alternate cycles is used alternatingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320013533 CN203170181U (en) | 2013-01-11 | 2013-01-11 | Novel thermal energy recovery system for desorption tail gas of adsorption tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320013533 CN203170181U (en) | 2013-01-11 | 2013-01-11 | Novel thermal energy recovery system for desorption tail gas of adsorption tank |
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| Publication Number | Publication Date |
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| CN203170181U true CN203170181U (en) | 2013-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320013533 Expired - Lifetime CN203170181U (en) | 2013-01-11 | 2013-01-11 | Novel thermal energy recovery system for desorption tail gas of adsorption tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108854456A (en) * | 2018-07-17 | 2018-11-23 | 九三粮油工业集团有限公司 | A kind of Analytic Tower heat energy recycling system and utilize method |
-
2013
- 2013-01-11 CN CN 201320013533 patent/CN203170181U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108854456A (en) * | 2018-07-17 | 2018-11-23 | 九三粮油工业集团有限公司 | A kind of Analytic Tower heat energy recycling system and utilize method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130904 |