CN110218632B - Fermentation air pretreatment system - Google Patents
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- CN110218632B CN110218632B CN201910571397.2A CN201910571397A CN110218632B CN 110218632 B CN110218632 B CN 110218632B CN 201910571397 A CN201910571397 A CN 201910571397A CN 110218632 B CN110218632 B CN 110218632B
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- 238000000855 fermentation Methods 0.000 title claims abstract description 26
- 230000004151 fermentation Effects 0.000 title claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 238000005192 partition Methods 0.000 claims abstract description 24
- 238000001704 evaporation Methods 0.000 claims abstract description 16
- 230000008020 evaporation Effects 0.000 claims abstract description 16
- 238000009833 condensation Methods 0.000 claims abstract description 10
- 230000005494 condensation Effects 0.000 claims abstract description 10
- 238000009413 insulation Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 230000001105 regulatory effect Effects 0.000 claims description 17
- 238000000926 separation method Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- UQMRAFJOBWOFNS-UHFFFAOYSA-N butyl 2-(2,4-dichlorophenoxy)acetate Chemical compound CCCCOC(=O)COC1=CC=C(Cl)C=C1Cl UQMRAFJOBWOFNS-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000007791 dehumidification Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010564 aerobic fermentation Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000010261 cell growth Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/12—Means for regulation, monitoring, measurement or control, e.g. flow regulation of temperature
- C12M41/18—Heat exchange systems, e.g. heat jackets or outer envelopes
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Abstract
A fermentation air pretreatment system comprises an air heater, an air cooler and a gas-liquid separator, wherein the air heater is vertical, the inside of the air heater is divided into an upper space and a lower space through a heat insulation partition board, a heat pipe penetrates through the heat insulation partition board, an evaporation section is arranged below the heat pipe, a condensation section is arranged above the evaporation section, an air outlet and an air inlet are formed in the upper part and the lower part of the left side of the air heater, an air bypass channel with adjustable flow rate is formed in the lower part of the air heater, the air cooler and the gas-liquid separator are combined and arranged in a horizontal shell, an air inlet interface connected with a first interface at the lower part of the right side of the air heater is formed in the left side of the shell, and an air outlet interface is formed in the right side of the shell and connected with a second interface at the upper part of the right side of the air heater through an internal pipeline; the air cooler is composed of several groups of heat exchange units, which can be switched. The invention has reasonable structural design, high efficiency, energy conservation, heat transfer coefficient improvement, simple and reliable system, low resistance loss, and reduction of manufacturing cost and operation cost, so that the air quality at the outlet of the system is improved, and stable fermentation production is promoted.
Description
Technical Field
The invention belongs to the technical field of biochemical production, relates to a compressed air purification system, and particularly relates to a fermentation air pretreatment system applied to aerobic fermentation.
Background
Aerobic fermentation refers to the process of microbial fermentation that requires oxygen for substrate assimilation, cell growth, and product metabolism. The source of oxygen is air, which must be continuously supplied with clean, dry, sterile air during the fermentation run, and which requires a certain pressure to overcome the equipment, pipeline drag losses, static pressure generated by the liquid submerged fermentation substrate, and the pressure in the tank required by the process.
Today, membrane technology has been widely used for aseptic air treatment in fermentations, but membrane plants require dry, clean inlet air and therefore must be subjected to cooling, dehumidification and dehumidification treatments by pre-pretreatment systems. The traditional pre-treatment system usually adopts a process of two-stage cooling of circulating water and chilled water, two-stage dewatering and then steam heating, and the equipment is a common tubular heat exchanger and a cyclone separator. Such a conventional pre-conditioning system has the following disadvantages: 1. the process is complex, and the resistance loss is large; 2. the equipment efficiency is low, the condensate water removal rate after cooling is low, and the dehumidification effect is poor; 3. because of low equipment efficiency, the temperature difference between cooling and heating is large, and the energy consumption is high.
Through examination, the Chinese patent 'air pretreatment System' of the prior patent number 200910208228 basically solves the problem of higher resistance, but the air heating source adopts circulating hot water, and the heat source of the hot water is a heat exchange unit which is independently arranged in the air cooler of the system. The hot water circulation operation needs to be additionally provided with a set of support system, wherein the support system comprises a hot water storage barrel, a water pump, an automatic control device, an auxiliary steam heating device, a system automatic control system and the like, and the operation cost comprises water pump electricity charge, descaling and cleaning cost of hot water flowing through heat exchange equipment, automatic control maintenance cost and the like. The system is complex, the reliability is not high enough, and the operation cost is high. Also if the hot water of the heater leaks into the air, fermentation and bacteria contamination are caused, which is a fatal hidden trouble.
In addition, the Chinese patent 'fermentation air pretreatment System' with the patent number 200920120153.4 has the advantages that the heating source is hot air, the heater adopts a traditional shell-and-tube structure, the system is simple, the reliability is high, and the fermentation production is safe and stable. However, when the requirements for energy conservation and emission reduction are increasing, the system needs to be improved, particularly the resistance loss needs to be further reduced, and therefore, the system needs to be thoroughly innovated in the aspects of flow process and equipment structure.
Disclosure of Invention
The invention aims to solve the technical problem of providing a fermentation air pretreatment system which is reasonable in structural design, small in resistance loss, more efficient and energy-saving.
The technical scheme adopted for solving the technical problems is as follows: a fermentation air pretreatment system, characterized in that: the air heater is of a vertical structure, the air heater is internally divided into an upper enclosed space and a lower enclosed space through an insulating partition board, the upper space is a heated area of cold and wet air, the lower space is a heat release area of hot air, the heat pipe penetrates through the insulating partition board, an evaporation section is arranged below the insulating partition board, a condensation section is arranged above the insulating partition board, a system air outlet and an air inlet are respectively formed in the upper part and the lower part of the left side of the air heater, a first interface connected with the air cooler is formed in the lower part of the right side of the air heater, an air bypass channel is formed in the lower part of the air heater, and a regulating valve is arranged in the air bypass channel;
The air cooler and the gas-liquid separator are arranged in a horizontal pressure vessel shell in a left-right combined mode, an air inlet interface connected with a first interface of the air heater is arranged on the left side of the shell, an air outlet interface is arranged on the right side of the shell, and the air outlet interface is connected with a second interface on the upper right side of the air heater through an internal air pipeline;
the air cooler consists of a plurality of groups of heat exchange units vertically arranged along the length direction of the shell, air entering from an air inlet of the air heater enters the air cooler from a first interface for cooling after passing through an evaporation section and a bypass channel, and a first liquid outlet for discharging condensate generated after the heat exchange units are cooled is formed in the bottom of the shell;
The gas-liquid separator is arranged on the right side of the air cooler in the shell, and comprises a plurality of separation unit pipes which are horizontally and uniformly distributed on the circular section through which air flows along the length direction of the shell, and a second liquid outlet for discharging liquid drops generated after the wet air is condensed and centrifugally settled is arranged at the bottom of the shell.
As an improvement, the thickness of the heat insulation partition plate is between 10 and 30mm, and the air fluid pressure of the upper part and the lower part in the air heater is basically balanced.
And when the hot air entering the system releases too much heat in the evaporation section and exceeds the heating requirement of cold and wet air in the condensation section, the opening degree of the regulating valve is regulated by rotating the operating rod, namely the air flow of the bypass channel is regulated, so that the constant control of the air temperature of the air outlet of the system is realized.
Further, the heat exchange units are not less than two groups, each group of heat exchange units comprises a cylindrical fin heat exchange tube, the fin heat exchange tubes are arranged in the length direction of the shell, an upper tube box and a lower tube box are arranged at the openings of the upper end and the lower end of the fin heat exchange tube, the upper tube box and the lower tube box extend out of the shell respectively, an upper cover plate welded with a water inlet connecting tube and a water outlet connecting tube is detachably covered on the upper tube box, and a lower cover plate welded with a sewage draining connecting tube is detachably covered at the lower end of the lower tube box.
Still further, go up the pipe case and constitute by rectangular tube sheet, rectangle takeover, rectangle flange and the tube side division board of welding on the fin heat exchange tube, the cooling water is from the water inlet takeover of upper cover plate entering last pipe case, heat exchange tube inside, down the pipe case, upwards again through heat exchange tube inside, last pipe case, and finally follow out the water takeover and draw forth.
Still further, the rectangular tube plate is welded and fixed in the rectangular connecting tube, the length and the width of the plane of the rectangular tube plate are smaller than the diameter of the cylinder body, and the thickness of the rectangular tube plate is between 12 and 20 mm.
Still further, down the pipe case and go up the pipe case symmetry setting, down the structure of pipe case and last pipe case basically the same, the difference is that the pipe side division board of down the pipe case is less than the pipe side division board of last pipe case, and the pipe side division board is according to the pipe side number setting, if pipe side number is 2, does not have the division board in the pipe case down.
Still further, upper cover plate and lower apron are the rectangle apron that the symmetry set up, and upper cover plate and lower apron seal cover establish upper end and the lower extreme of upper pipe case and lower pipe case, and upper cover plate and lower apron pass through the bolt and are connected fixedly with the rectangle flange detachably on upper pipe case and the lower pipe case.
Finally, the separation unit tube is internally provided with a flow guiding and stabilizing device, the tail end of the separation unit tube is provided with an air outlet interface and a liquid outlet interface, liquid drops discharged by the liquid outlet interface are finally discharged out of the shell from the second liquid outlet, and saturated wet air discharged by the air outlet is finally discharged out of the air outlet interface.
Compared with the prior art, the invention has the advantages that: a bypass channel is designed in the air heater, air passing through the evaporation section of the heat pipe and air passing through the bypass channel are parallel in the same direction, and an adjusting valve is arranged in the bypass channel to control flow and realize resistance balance; the air cooler and the gas-liquid separator are combined in a shell and are arranged front and back, so that the manufacturing cost can be reduced, and the air resistance can be reduced; the rectangular pipe box structure is designed on the air cooler, and the detachable upper cover plate and the detachable lower cover plate are arranged, so that the air cooler is convenient to clean and maintain. The invention has reasonable structural design, higher efficiency and energy conservation, improves the heat transfer coefficient, has simple and reliable system and extremely low resistance loss, reduces the manufacturing cost and the operation cost, improves the air quality at the outlet of the system, and promotes the stable production of fermentation.
Drawings
FIG. 1 is a schematic diagram of a fermentation air pretreatment system provided by the present invention;
FIG. 2 is a cross-sectional view of the air heater of FIG. 1 taken along line A-A;
FIG. 3 is a cross-sectional view of the heat exchange unit of FIG. 1 taken along line B-B;
FIG. 4 is a cross-sectional view of the inlet end of the gas-liquid separator of FIG. 1 taken along line C-C.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1 to 4, a fermentation air pretreatment system (or apparatus) comprises an air heater 1 with a heat pipe 10, an air cooler 2, a gas-liquid separator 3 and an internal air pipeline 4, wherein the air heater 1 is of a vertical structure, the air heater 1 is divided into an upper closed space and a lower closed space by a heat insulation partition 11, the upper space is a region where cold and wet air is heated, the lower space is a space where hot air releases heat, the heat pipe penetrates through the heat insulation partition, the heat pipe 10 penetrates through the heat insulation partition 11, an evaporation section 12 is arranged below the heat insulation partition 11, and a condensation section 13 is arranged above the heat insulation partition 11; the thickness of the heat insulating partition 11 is 10-30 mm, and the air fluid pressure of the upper and lower parts in the air heater 1 is basically balanced.
The upper and lower parts of the left side of the air heater 1 are respectively provided with an air outlet 1d and an air inlet 1a, the lower part of the right side of the air heater 1 is provided with a first interface 1b connected with an air cooler 2, the lower part of the air heater 1 is internally provided with an air bypass channel 14, after the hot air enters from the air inlet 1a, the hot air can pass through an evaporation section 12 and the air bypass channel 14 of a heat pipe at the same time, the air bypass channel 14 and the space around the cylinder body of the air heater 1 are blocked (the shaded part in fig. 4), the air bypass channel 14 consists of a pipeline 141, a regulating valve 142 arranged in the pipeline 141 and an operating rod 143, one end of the operating rod 143 is connected with the regulating valve 142, and the other end extends out of the air heater 1, when the hot air entering the system releases excessive heat in the evaporation section 12 and exceeds the heating requirement of cold and wet air in the condensation section 13, the opening degree of the regulating valve 142 is regulated by rotating the operating rod 143, namely the air flow of the air bypass channel is regulated, so that the constant control of the air temperature of the air outlet 1d of the system is realized; the control mode can be manually operated, or can be connected with an electric or pneumatic automatic control actuator, and the air passing through the evaporation section 12 and the air bypass channel 14 can only enter the air cooler 2 through the first interface 1 b.
Obviously, the internal bypass passage of the device with the regulating valve as described above is extremely low in cost and resistance compared with the bypass pipe, valve, flange and the like which are arranged outside other system devices.
The air cooler 2 and the gas-liquid separator 3 are arranged in a horizontal pressure vessel shell 40 in a left-right combined mode, an air inlet port 401 connected with a first port 1b of the air heater 1 is arranged on the left side of the shell 40, an air outlet port 402 is arranged on the right side of the shell 40, and the air outlet port 402 is connected with a second port 1c on the upper right side of the air heater 1 through an internal air pipeline 4.
The air cooler 2 of the present embodiment is composed of three groups of heat exchange units 20, the heat exchange units 20 are arranged along the length direction of the shell 40, each group of heat exchange units 20 comprises a fin heat exchange tube 21, an upper tube box 22 and a lower tube box 23 which are clustered, the fin heat exchange tubes 21 are arranged vertically to the length direction of the shell 40, the upper tube box 22 and the lower tube box 23 are symmetrically arranged at the openings at the upper end and the lower end of the fin heat exchange tube 21, the upper tube box 22 and the lower tube box 23 respectively extend out of the shell 40, an upper cover plate 24 welded with a water inlet connecting tube 241 and a water outlet connecting tube 242 is detachably arranged on the upper tube box 22, and a lower cover plate 25 welded with a sewage draining connecting tube 251 is detachably arranged at the lower end of the lower tube box 23; the upper tube box 22 is formed by enclosing a rectangular tube plate 221, rectangular connecting tubes 222, rectangular flanges 223 and tube side separating plates 224 which are welded on the fin heat exchange tubes 21, wherein the periphery of the rectangular tube plate 221 is welded in the rectangular connecting tubes 222, the length and the width of the plane of the rectangular tube plate 221 are smaller than the diameter of the fin heat exchange tubes 21, and the thickness of the rectangular tube plate 221 is between 12 and 20 mm; the lower tube box 23 has substantially the same structure as the upper tube box 22, except that the tube side partition plate 224 of the lower tube box 23 is one less than the tube side partition plate 224 of the upper tube box 22, the tube side partition plate 224 is set according to the tube side number, and if the tube side number is 2, the tube side partition plate 224 is not provided in the lower tube box 23; the upper cover plate 24 and the lower cover plate 25 are symmetrically arranged rectangular cover plates, the upper cover plate 24 and the lower cover plate 25 are hermetically arranged at the upper end and the lower end of the upper pipe box 22 and the lower pipe box 23, the upper cover plate 24 and the lower cover plate 25 are detachably connected and fixed with rectangular flanges 223 on the upper pipe box 22 and the lower pipe box 23 through bolts, the bolts can be detached when needed, the upper cover plate 24 or the lower cover plate 25 is opened, and the interior of the pipe box and the interior of a heat exchange pipe are cleaned, so that the cleaning one by one can be realized as long as the heat exchange unit 20 is provided with more than two groups, and the normal circulation of shell side air is not influenced; cooling water enters the upper tube box 22, the inside of the fin heat exchange tube 21 and the lower tube box 23 from the water inlet connecting tube 241 of the upper cover plate 24, passes upwards through the inside of the fin heat exchange tube 21 and the upper tube box 22, and finally is led out from the water outlet connecting tube 242; the same or different cooling water can be moved to every group heat exchange unit 20, and the break-make of every group heat exchange unit 20 cooling water can be operated respectively, can be in the winter and spring that the cooling load is lower, under the condition that shell side air circulates, unpack the washing one by one to the pipe box. The online cleaning without stopping machine reduces the production and operation cost; the air entering from the air inlet 1a of the air heater 1 enters the air cooler 2 from the first interface 1b for cooling after passing through the evaporation section 12 and the air bypass channel 14, wherein water vapor is cooled and condensed, the separated condensed water is condensed on the surface of the fin heat exchange tube 21, flows downwards under the action of gravity and is accumulated at the bottom, the air is discharged out of the shell 40 through the first liquid outlet 26, and small-diameter liquid mist droplets entrained by air flow enter the subsequent gas-liquid separator 3.
The gas-liquid separator 3 is arranged in the shell 40 and positioned on the right side of the air cooler 2, the gas-liquid separator 3 adopts the equipment disclosed in patent publication number 201811387224, the gas-liquid separator 3 comprises a plurality of separation unit pipes 31, the separation unit pipes 31 are horizontally and uniformly distributed on a round section through which air flows along the length direction of the shell 40, as the air cooler 2 and the gas-liquid separator 3 are combined in the same shell 40, the air flow section is not suddenly changed, no rectification is needed, and wet air naturally and uniformly distributes the flow into each separation unit pipe 31; the separation unit tube 31 contains a flow guide and flow stabilizing device 311, the tail end of the separation unit tube is provided with an exhaust port 312 and a liquid discharge interface 313, the rear side of the bottom of the shell 40 is provided with a second liquid discharge port 32 for discharging liquid drops, wet air enters the interior, the wet air rotates due to flow guide, the liquid drops are subjected to impact condensation for many times and centrifugally settled on the wall of the separation unit tube 31, the liquid drops are discharged from the tail end liquid discharge port 313, then collected at the bottom, finally the shell 40 is discharged from the second liquid discharge port 32, saturated wet air with water removed is discharged from the exhaust port 312, finally the wet air is discharged from an air outlet interface 402, and the air outlet interface 402 is connected with the second interface 1c of the air heater 1 through an internal air pipeline 4.
The combined design of the air cooler 2 and the gas-liquid separator 3 saves resistance and cost. The opening design of the air cooler 2 meets the requirement of convenient process cleaning and the design requirement of the pressure vessel in strength, the integrity of the cylinder shell is reserved to the maximum extent, and the air cooler can be verified by finite element analysis and calculation.
Through the internal air pipeline 4, the air outlet port 402 of the gas-liquid separator 3 is connected with the upper second port 1c of the air heater 1, the wet air enters the condensation section 13 from the second port 1c of the air heater 1, heat exchange occurs between the wet air and working medium steam in the pipe, the steam is condensed and flows back to the lower evaporation section 12, the air is heated, the relative humidity is reduced, and finally the wet air is discharged from the air outlet 1 d. The air inlet 1a and the air outlet 1d of the air heater are the inlet and the outlet of the system, and are connected with corresponding external pipelines according to engineering requirements.
As previously described, there is a time difference between each flow into the system for a particular air bolus. However, for the air heater 1, the air of the lower evaporator section 12 and the upper condenser section 13 almost always coexist at all times. The two air streams also continuously and indirectly exchange heat due to the continuous circulation of the evaporation and condensation of the working medium in the heat pipe. This heat exchange does not require heat input from outside the system, and the cooling load of the cooler is also reduced, and the energy saving benefit is very remarkable.
The heat insulating partition 11 of the air heat exchanger 1 is also provided with air at both ends, and the pressure difference between the two is the total resistance of the air flowing through the air cooler 2, the gas-liquid separator 3 and the internal air duct 4, and this resistance can be controlled to about 2kPa under normal conditions. Therefore, the heat insulation baffle 11 can be designed almost according to normal pressure, and is irrelevant to the pressure of air, and only the rigidity problem under the gravity action of the heat pipe is needed to be considered. This has positive significance in reducing manufacturing difficulty and cost.
The total resistance of the air on both sides of the air heater 1 can be controlled to be about 1kPa under normal conditions. The total resistance of the system is thus about 3kPa. This data is almost optimal in all current scale fermentation air pretreatment systems. Compared with the traditional combined system of the fixed tube plate tube heat exchanger and the cyclone separator, the resistance of the combined system is between 10 and 50 kPa; the resistance of the air pretreatment system of the comparative patent 200920120153.4 is also about 5 to 10 kPa. The air resistance is reduced, the air compressor can be operated under reduced pressure, and for large-scale fermentation enterprises, the pressure difference of a few kilopascals can save electricity charge by hundreds of thousands of yuan each year.
The system of the invention can be said to achieve ideal combination in aspects of use process performance, technical index performance, equipment safety performance and lower cost.
Claims (7)
1. A fermentation air pretreatment system, characterized in that: the air heater is of a vertical structure, the air heater is internally divided into an upper enclosed space and a lower enclosed space through an insulating partition board, the upper space is a heated area of cold and wet air, the lower space is a heat release area of hot air, the heat pipe penetrates through the insulating partition board, an evaporation section is arranged below the insulating partition board, a condensation section is arranged above the insulating partition board, a system air outlet and an air inlet are respectively formed in the upper part and the lower part of the left side of the air heater, a first interface connected with the air cooler is formed in the lower part of the right side of the air heater, an air bypass channel is formed in the lower part of the air heater, and a regulating valve is arranged in the air bypass channel;
The air cooler and the gas-liquid separator are arranged in a horizontal pressure vessel shell in a left-right combined mode, an air inlet interface connected with a first interface of the air heater is arranged on the left side of the shell, an air outlet interface is arranged on the right side of the shell, and the air outlet interface is connected with a second interface on the upper right side of the air heater through an internal air pipeline;
the air cooler consists of a plurality of groups of heat exchange units vertically arranged along the length direction of the shell, air entering from an air inlet of the air heater enters the air cooler from a first interface for cooling after passing through an evaporation section and a bypass channel, and a first liquid outlet for discharging condensate generated after the heat exchange units are cooled is formed in the bottom of the shell;
the gas-liquid separator is arranged in the shell and positioned on the right side of the air cooler, and comprises a plurality of separation unit pipes which are horizontally and uniformly distributed on a circular section through which air flows along the length direction of the shell, and a second liquid outlet for discharging liquid drops generated after the wet air is condensed and centrifugally settled is arranged at the bottom of the shell;
the thickness of the heat insulation partition plate is 10-30 mm, and the air fluid pressure of the upper part and the lower part in the air heater is basically balanced;
The air bypass channel consists of a pipeline, a regulating valve and an operating rod, wherein the regulating valve and the operating rod are arranged in the pipeline, the pipeline is arranged below the heat pipe, one end of the operating rod is connected with the regulating valve, the other end of the operating rod extends out of the air heater, when hot air entering the system releases excessive heat in the evaporation section and exceeds the heating requirement of cold and wet air in the condensation section, the opening degree of the regulating valve is regulated by rotating the operating rod, namely, the air flow of the bypass channel is regulated, and the constant control of the air temperature of an air outlet of the system is realized.
2. The fermentation air pretreatment system of claim 1, wherein: the heat exchange units are not less than two groups, each group of heat exchange units comprises cylindrical fin heat exchange tubes, the fin heat exchange tubes are arranged in the length direction of the shell, an upper tube box and a lower tube box are arranged at the openings of the upper end and the lower end of each fin heat exchange tube, the upper tube box and the lower tube box extend out of the shell respectively, an upper cover plate welded with a water inlet connecting tube and a water outlet connecting tube is detachably covered on the upper tube box, and a lower cover plate welded with a sewage draining connecting tube is detachably covered at the lower end of the lower tube box.
3. The fermentation air pretreatment system of claim 2, wherein: the upper tube box consists of a rectangular tube plate welded on the fin heat exchange tube, a rectangular connecting tube, a rectangular flange and a tube side partition plate, cooling water enters the upper tube box from a water inlet connecting tube of the upper cover plate, the inside of the heat exchange tube, the lower tube box, upwards passes through the inside of the heat exchange tube and the upper tube box, and finally is led out from a water outlet connecting tube.
4. A fermentation air pretreatment system according to claim 3, wherein: the rectangular tube plate is welded and fixed in the rectangular connecting tube, the length and the width of the plane of the rectangular tube plate are smaller than the diameter of the cylinder body, and the thickness of the rectangular tube plate is 12-20 mm.
5. The fermentation air pretreatment system according to claim 4, wherein: the lower tube box and the upper tube box are symmetrically arranged, the structure of the lower tube box is basically the same as that of the upper tube box, and the difference is that the tube pass division plates of the lower tube box are one less than those of the upper tube box, the tube pass division plates are set according to the tube pass number, and if the tube pass number is 2, no division plate exists in the lower tube box.
6. The fermentation air pretreatment system according to claim 5, wherein: the upper cover plate and the lower cover plate are rectangular cover plates which are symmetrically arranged, the upper cover plate and the lower cover plate are sealed and arranged at the upper end and the lower end of the upper pipe box and the lower pipe box, and the upper cover plate and the lower cover plate are detachably connected and fixed with rectangular flanges on the upper pipe box and the lower pipe box through bolts.
7. The fermentation air pretreatment system according to any one of claims 1 to 6, wherein: the separation unit tube is internally provided with a flow guiding and stabilizing device, the tail end of the separation unit tube is provided with an air outlet interface and a liquid outlet interface, liquid drops discharged by the liquid outlet interface are finally discharged out of the shell from the second liquid outlet, and saturated wet air discharged by the air outlet is finally discharged out of the air outlet interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910571397.2A CN110218632B (en) | 2019-06-28 | 2019-06-28 | Fermentation air pretreatment system |
Applications Claiming Priority (1)
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