CN113899235A - Kitchen waste pretreatment waste heat recycling method and recycling system - Google Patents
Kitchen waste pretreatment waste heat recycling method and recycling system Download PDFInfo
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- CN113899235A CN113899235A CN202111480465.8A CN202111480465A CN113899235A CN 113899235 A CN113899235 A CN 113899235A CN 202111480465 A CN202111480465 A CN 202111480465A CN 113899235 A CN113899235 A CN 113899235A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0014—Recuperative heat exchangers the heat being recuperated from waste air or from vapors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B15/00—Other accessories for centrifuges
- B04B15/02—Other accessories for centrifuges for cooling, heating, or heat insulating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
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Abstract
A kitchen waste pretreatment waste heat recycling method and a recycling system are disclosed, wherein a slurry caching device is used for conveying low-temperature slurry after secondary pressing to a heating tank, and the heating tank is used for heating the slurry and outputting the heated slurry to a three-phase separator for separation; after the three-phase separator finishes separation, outputting high-temperature sewage with the temperature of more than 80 ℃ to a sewage receiving box; the sewage receiving box conveys the high-temperature sewage to the high-temperature side of the first heat exchange device to carry out primary heat exchange with the low-temperature slurry output by the slurry caching device after secondary squeezing; and the sewage after the first heat exchange flows into the second heat exchange device from the first heat exchange device to perform secondary heat exchange with cold water in the cooling tower, and is sent into the anaerobic tank after the temperature is reduced to a target temperature. According to the invention, the slurry after secondary pressing and the sewage after three-phase separation exchange heat through the heat exchanger, the amount of steam required during heating is reduced, energy is saved, the emission of carbon dioxide, nitrogen oxides and sulfides is reduced, and the pollution to the environment is reduced.
Description
Technical Field
The invention relates to a treatment method of kitchen waste. In particular to a kitchen waste pretreatment waste heat recycling method and a recycling system.
Background
The temperature of the sewage at 80 ℃ separated by the three-phase separator needs to be reduced to below 50 ℃ before entering the anaerobic tank, the sewage is directly cooled by a cooling tower in the conventional method, and the waste heat of the sewage is not utilized.
Heating the slurry after secondary pressing to over 80 ℃ if the best oil extraction effect is achieved, and conventionally conveying the slurry after secondary pressing to a heating tank and heating the slurry by steam in a coil pipe outside the heating tank; the slurry of the heating tank enters a three-phase separator, the temperature of the separated sewage is above 80 ℃, the temperature acceptable by the anaerobic tank is below 50 ℃ (high-temperature anaerobic fermentation) or 38 ℃ (low-temperature anaerobic fermentation), the separated sewage needs to be cooled, and the sewage is usually directly cooled by cooling water.
Disclosure of Invention
The invention aims to solve the technical problem of providing a kitchen waste pretreatment waste heat recycling method and a recycling system which can reduce the steam consumption of a heating tank through slurry-sewage heat exchange.
The technical scheme adopted by the invention is as follows: in order to overcome the defects of the prior art, a method and a system for recycling kitchen waste pretreatment waste heat are provided. The kitchen waste pretreatment waste heat recycling method comprises the following steps:
step 1: conveying the low-temperature slurry subjected to secondary pressing to a heating tank by a slurry caching device, heating the slurry by the heating tank, and outputting the heated slurry to a three-phase separator for separation;
step 2: after the three-phase separator finishes separation, outputting high-temperature sewage with the temperature of more than 80 ℃ to a sewage receiving box;
and step 3: the sewage receiving box conveys the high-temperature sewage to the high-temperature side of the first heat exchange device to carry out primary heat exchange with the low-temperature slurry output by the slurry caching device after secondary squeezing;
and 4, step 4: and the sewage after the first heat exchange flows into the second heat exchange device from the first heat exchange device to perform secondary heat exchange with cold water in the cooling tower, and is sent into the anaerobic tank after the temperature is reduced to a target temperature.
And (3) heating the slurry subjected to secondary pressing by the heating tank through steam in the outer coil pipe in the step 1, and feeding the slurry into a three-phase separator for separation when the temperature of the slurry reaches over 80 ℃.
And 3, after the low-temperature slurry in the heating tank reaches the capacity, closing the feeding inlet, and directly flowing the secondarily squeezed low-temperature slurry output by the slurry caching device into the low-temperature side of the first heat exchange device for circulation so as to exchange heat with the high-temperature sewage flowing through the high-temperature side of the first heat exchange device.
When the first heat exchange device is overhauled, sewage directly enters the second heat exchange device to exchange heat with cold water of the cooling tower, and when the first heat exchange device is overhauled and the normal work is recovered, the step 2 enters the step 3.
The target temperature reached by the secondary heat exchange in step 4 is below 50 ℃.
The invention relates to a recycling system of a kitchen waste pretreatment waste heat recycling method, which comprises a slurry cache tank for receiving low-temperature slurry after secondary pressing, more than 1 heating tank for heating the low-temperature slurry, a three-phase separator for separating the heated slurry, a sewage tank for receiving sewage discharged after separation by the three-phase separator, a second heat exchanger for exchanging heat of the sewage discharged by the sewage tank, a cooling tower connected to the low-temperature side of the second heat exchanger, and a first heat exchanger for exchanging heat of the sewage discharged by the sewage tank; the low-temperature slurry outlet end of the slurry cache tank is connected with one end of a first pipeline, the other end of the first pipeline is connected with the slurry inlet end of the slurry cache tank, the low-temperature slurry outlet end of the slurry cache tank is connected with a liquid inlet of a heating tank through a first pump set arranged at the position close to the inlet end on the first pipeline, a liquid outlet of the heating tank is connected with a three-phase separator through a second pipeline and a second pump set arranged on the second pipeline, a water outlet of sewage separated by the three-phase separator is connected with a water inlet of a sewage tank through a pipeline, the water outlet of the sewage tank is connected with a sewage inlet at the high-temperature side of a first heat exchanger through a third pipeline and a third pump set arranged on the third pipeline, a sewage outlet at the high-temperature side of the first heat exchanger is connected with a water inlet at the high-temperature side of the second heat exchanger through a fourth pipeline, and an inlet end and an outlet end at the low-temperature side of the first heat exchanger are respectively connected with the first pipeline and located on the first pipeline And the low-temperature side of the second heat exchanger is connected with a cooling tower through a fourth pump group and used for cold water circulation.
The outlet end of the third pipeline is connected with the inlet of a fifth pipeline, the outlet of the fifth pipeline is connected with the water inlet of the high-temperature side of the second heat exchanger, the outlet end of the third pipeline is connected with the water inlet end of the high-temperature side of the first heat exchanger through a first stop valve respectively, and is connected with the water inlet end of the high-temperature side of the second heat exchanger through a second stop valve.
The first pump set, the second pump set, the third pump set and the fourth pump set are identical in structure and are formed by connecting a main pump pipeline and a standby pump pipeline which are identical in structure in parallel, and the main pump pipeline and the standby pump pipeline respectively comprise an inlet end stop valve, a pump, a check valve and an outlet end stop valve which are sequentially arranged from an inlet end to an outlet end.
And a third stop valve is arranged at the water outlet end of the high-temperature side of the first heat exchanger, and a fourth stop valve is arranged at the sewage inlet end of the second heat exchanger.
The first pipeline is provided with two groups of valve groups, wherein one group of valve groups is arranged on the part of the first pipeline which is positioned after the slurry passes through the inlet end of the last heating tank and consists of an eighth stop valve and a third pneumatic valve, the other group of valve groups is arranged on the first pipeline which is positioned on the section of the first pipeline between the outlet side of the first pump group and the slurry inlet and the slurry outlet which are connected with the low-temperature side of the first heat exchanger, and consists of a fifth stop valve and a first pneumatic valve, the slurry inlet end of the low-temperature side of the first heat exchanger is connected with a sixth stop valve and a second pneumatic valve in series, and the slurry outlet end of the low-temperature side of the first heat exchanger is provided with a seventh stop valve.
According to the kitchen waste pretreatment waste heat recycling method and the recycling system, the slurry after secondary pressing and the sewage after three-phase separation pass through the heat exchanger to realize slurry-sewage heat exchange, the sewage to the anaerobic tank absorbs a part of heat after heat exchange is finished, and then the sewage is continuously cooled to the target temperature by using cooling water. At the same time, the temperature of the slurry before entering the three-phase separator is increased, so that after entering the heating tank, the amount of steam required can be reduced. The steam quantity is reduced by using the invention, and the most intuitive advantages are as follows: the fuel consumption of the boiler is reduced, the energy is saved, the emission of carbon dioxide, nitrogen oxides and sulfides is reduced, and the pollution to the environment is reduced.
Drawings
FIG. 1 is a schematic diagram of a kitchen waste pretreatment waste heat recovery system of the present invention;
fig. 2 is a schematic view of the structure of a first pump group, a second pump group, a third pump group and a fourth pump group in the present invention.
In the drawings
1: slurry buffer tank 2: first pump group
3: heating the tank 4: second pump group
5: three-phase separator 6: sewage tank
7: the third pump group 8: first heat exchanger
9: cooling tower 10: fourth pump group
11: second heat exchanger 12: first pipeline
13: second pipe 14: third pipeline
15: fourth pipe 16: fifth pipeline
17: first shut-off valve 18: second stop valve
19: third stop valve 20: fourth stop valve
21: first pneumatic valve 22: fifth stop valve
23: second air-operated valve 24: sixth stop valve
25: the seventh stop valve 26: eighth stop valve
27: the third air-operated valve a: main pump pipeline
B: backup pump line a: input end stop valve
b: and c, a pump: check valve
d: and an outlet end stop valve.
Detailed Description
The method and the system for recycling the kitchen waste pretreatment waste heat are described in detail below with reference to the embodiments and the accompanying drawings.
The invention relates to a kitchen waste pretreatment waste heat recycling method, which comprises the following steps:
step 1: conveying the low-temperature slurry subjected to secondary pressing to a heating tank by a slurry caching device, heating the slurry by the heating tank, and outputting the heated slurry to a three-phase separator for separation;
the heating tank heats the slurry after secondary pressing through steam in the outer coil pipe, and when the temperature of the slurry reaches over 80 ℃, the slurry is sent to a three-phase separator for separation.
Step 2: after the three-phase separator finishes separation, outputting high-temperature sewage with the temperature of more than 80 ℃ to a sewage receiving box;
and step 3: the sewage receiving box conveys the high-temperature sewage to the high-temperature side of the first heat exchange device to carry out primary heat exchange with the low-temperature slurry output by the slurry caching device after secondary squeezing;
and after the low-temperature slurry in the heating tank reaches the rated capacity, closing the feeding inlet, and directly flowing the secondarily squeezed low-temperature slurry output by the slurry caching device into the low-temperature side of the first heat exchange device for circulation so as to exchange heat with the high-temperature sewage flowing through the high-temperature side of the first heat exchange device. When the heating tank is in a heating state and does not need feeding, low-temperature slurry in the slurry caching device directly returns to the slurry caching device after first heat exchange, and the self-circulation of the low-temperature slurry and the multiple heat exchange of high-temperature sewage are started, so that the heat exchange efficiency is improved.
And 4, step 4: and the sewage after the primary heat exchange flows into the second heat exchange device from the first heat exchange device to perform secondary heat exchange with cold water in the cooling tower, and is sent into the anaerobic tank after the temperature is reduced to a target temperature, wherein the target temperature reached by the secondary heat exchange is below 50 ℃.
In the method, when the first heat exchange device is overhauled, the sewage directly enters the second heat exchange device to exchange heat with the cold water of the cooling tower, and when the first heat exchange device is overhauled and recovers to work normally, the step 2 enters the step 3, so that the normal operation of the whole treatment process cannot be delayed.
As shown in fig. 1, the system for recycling waste heat from kitchen waste pretreatment of the present invention comprises a slurry buffer tank 1 for receiving low-temperature slurry after secondary pressing, more than 1 heating tank 3 for heating the low-temperature slurry, a three-phase separator 5 for separating the heated slurry, a sewage tank 6 for receiving sewage discharged from the three-phase separator 5, a second heat exchanger 11 for exchanging heat with sewage discharged from the sewage tank 6, and a cooling tower 9 connected to the low-temperature side of the second heat exchanger 11, and further comprises a first heat exchanger 8 for exchanging heat with sewage discharged from the sewage tank 6; wherein, the low-temperature slurry outlet end of the slurry buffer tank 1 is connected with one end of a first pipeline 12, the other end of the first pipeline 12 is connected with the slurry inlet end of the slurry buffer tank 1, the low-temperature slurry outlet end of the slurry buffer tank 1 is connected with the liquid inlet of a heating tank 3 through a first pump set 2 arranged on the first pipeline 12 and close to the inlet end, the liquid outlet of the heating tank 3 is connected with a three-phase separator 5 through a second pipeline 13 and a second pump set 4 arranged on the second pipeline 13, the water outlet of the three-phase separator 5 for separating sewage is connected with the water inlet of a sewage tank 6 through a pipeline, the water outlet of the sewage tank 6 is connected with the sewage inlet at the high temperature side of a first heat exchanger 8 through a third pipeline 14 and a third pump set 7 arranged on the third pipeline 14, and is used for heat exchange between high-temperature sewage and the low-temperature slurry flowing out of the slurry buffer tank 1, the sewage outlet on the high-temperature side of the first heat exchanger 8 is connected with the water inlet on the high-temperature side of the second heat exchanger 11 through a fourth pipeline 15, the inlet end and the outlet end on the low-temperature side of the first heat exchanger 8 are respectively connected onto the first pipeline 12 and located on the outlet side of the first pump set 2, the water outlet on the high-temperature side of the second heat exchanger 11 is connected with the anaerobic tank, and the low-temperature side of the second heat exchanger 11 is connected with the cooling tower 9 through a fourth pump set 10 and used for cold water circulation.
The outlet end of the third pipeline 14 is further connected to an inlet of a fifth pipeline 16, an outlet of the fifth pipeline 16 is connected to a water inlet on the high-temperature side of the second heat exchanger 11, wherein the outlet end of the third pipeline 14 is connected to a water inlet end on the high-temperature side of the first heat exchanger 8 through a first stop valve 17, and is connected to a water inlet end on the high-temperature side of the second heat exchanger 11 through a second stop valve 18. When the first heat exchanger 8 is overhauled, the sewage flowing out of the sewage tank 6 directly enters the second heat exchanger 11 without passing through the first heat exchanger 8. A third stop valve 19 is arranged at the water outlet end of the high-temperature side of the first heat exchanger 8, and a fourth stop valve 20 is arranged at the sewage inlet end of the second heat exchanger 11.
As shown in fig. 2, the first pump group 2, the second pump group 4, the third pump group 7 and the fourth pump group 10 have the same structure, and are respectively formed by connecting a main pump pipeline a and a backup pump pipeline B with the same structure in parallel, and the main pump pipeline a and the backup pump pipeline B respectively comprise an inlet-end stop valve a, a pump B, a check valve c and an outlet-end stop valve d which are sequentially arranged from an inlet end to an outlet end.
The first pipeline 12 is provided with two groups of valve sets, wherein one group of valve sets is arranged on the part of the first pipeline 12 after the slurry passes through the inlet end of the last heating tank 3 and is composed of an eighth stop valve 26 and a third pneumatic valve 27, the other group of valve sets is arranged on the section of the first pipeline 12 between the outlet side of the first pump group 2 and the slurry inlet and the slurry outlet connected with the low temperature side of the first heat exchanger 8 and is composed of a fifth stop valve 22 and a first pneumatic valve 21, the slurry inlet end of the low temperature side of the first heat exchanger 8 is connected with a sixth stop valve 24 and a second pneumatic valve 23 in series, and the slurry outlet end of the low temperature side of the first heat exchanger 8 is provided with a seventh stop valve 25.
The working process of the kitchen waste pretreatment waste heat recycling system comprises the following steps:
when the system starts to operate, the sixth stop valve 24, the second air-operated valve 23, the eighth stop valve 26, and the third air-operated valve 27 are in a closed state, the fifth stop valve 22 and the first air-operated valve 21 are opened, and the low-temperature slurry after secondary pressing enters the heating tank 3 from the outlet of the slurry buffer tank 1 through the first pump group 2, the fifth stop valve 22, the first air-operated valve 21, and the first pipeline 12 to be heated. At this time, no high-temperature sewage exists in the sewage tank 6, and the first heat exchanger 8 is in an idle state. After the heating of the heating tank is finished, discharging the high-temperature slurry from the bottom of the heating tank 3; the sewage enters a three-phase separator 5 through a second pump group 4 for separation, and the separated high-temperature sewage enters a sewage tank 6; high-temperature sewage from the sewage tank 6 enters the high-temperature side of the first heat exchanger 8 through the third pump unit 7, the third pipeline 14 and the first stop valve 17, at the moment, the fifth stop valve 22, the first pneumatic valve 21, the eighth stop valve 26 and the third pneumatic valve 27 are closed, low-temperature slurry after secondary pressing enters the first heat exchanger from the outlet of the slurry cache tank 1 through the first pump unit 2, the sixth stop valve 24 and the second pneumatic valve 23 to exchange heat with the high-temperature sewage, and the slurry after heat exchange enters the heating tank through the seventh stop valve 25 and the first pipeline 12 to be continuously heated. At this time, the second stop valve 18 is in a closed state, and the sewage after heat exchange enters the second heat exchanger 11 through the third stop valve 19, the fourth pipeline 15 and the fourth stop valve 20 to exchange heat with the cooling water conveyed by the cooling tower 9 through the fourth pump group 10; and (4) reducing the high-temperature sewage to the target temperature by secondary heat exchange, and conveying the high-temperature sewage to an anaerobic tank for subsequent anaerobic fermentation to produce the biogas.
When the heating tank 3 is in a working state and high-temperature sewage exists in the sewage tank 6, the liquid inlet valve group of the heating tank 3 is closed, the fifth stop valve 22 is closed, the first pneumatic valve 21 is closed, the sixth stop valve 24, the second pneumatic valve 23, the seventh stop valve 25, the eighth stop valve 26 and the third pneumatic valve 27 are opened, at the moment, high-temperature sewage exists on the high-temperature side of the first heat exchanger 8, low-temperature slurry after secondary pressing exists on the low-temperature side, the slurry enters the first heat exchanger from the outlet of the slurry cache tank 1 through the first pump group 2, the sixth stop valve 24 and the second pneumatic valve 23 to exchange heat with the high-temperature sewage, the slurry after heat exchange is returned to the slurry cache tank 1 through the seventh stop valve 25, the first pipeline 12, the eighth stop valve 26 and the third pneumatic valve 27, slurry self-circulation is carried out, and the heat exchange efficiency is improved. After the heating tank 3 finishes discharging the high-temperature slurry, the eighth stop valve 26 and the third pneumatic valve 27 are closed, the liquid inlet valve bank of the heating tank 3 is opened, and the heating tank continues to be charged. And after continuously carrying out heat exchange twice, reducing the temperature of the high-temperature sewage to the target temperature, and entering an anaerobic tank for subsequent anaerobic fermentation to produce biogas.
When the first heat exchanger 8 needs to be overhauled, the sixth stop valve 24 and the second pneumatic valve 23 are closed, the fifth stop valve 22 and the first pneumatic valve 21 are opened, low-temperature slurry after secondary pressing enters the heating tank 3 from the outlet of the slurry cache tank 1 through the first pump group 2, the fifth stop valve 22, the first pneumatic valve 21 and the first pipeline 12 to be heated, high-temperature slurry is discharged from the bottom of the heating tank 3 after the heating of the heating tank 3 is finished, the high-temperature slurry enters the three-phase separator 5 through the second pump group 4 to be separated, and the separated high-temperature sewage enters the sewage tank 6; at this time, the first stop valve 17 is closed, the second stop valve 18 is opened, and the high-temperature sewage from the sewage tank 6 enters the second heat exchanger 11 through the third pump group 7, the third pipeline 14, the second stop valve 18, the fifth pipeline 16 and the fourth stop valve 20 for heat exchange; and performing primary heat exchange with cooling water, cooling to a target temperature, and then entering an anaerobic tank for subsequent anaerobic fermentation to produce biogas.
Claims (10)
1. A kitchen waste pretreatment waste heat recycling method is characterized by comprising the following steps:
step 1: conveying the low-temperature slurry subjected to secondary pressing to a heating tank by a slurry caching device, heating the slurry by the heating tank, and outputting the heated slurry to a three-phase separator for separation;
step 2: after the three-phase separator finishes separation, outputting high-temperature sewage with the temperature of more than 80 ℃ to a sewage receiving box;
and step 3: the sewage receiving box conveys the high-temperature sewage to the high-temperature side of the first heat exchange device to carry out primary heat exchange with the low-temperature slurry output by the slurry caching device after secondary squeezing;
and 4, step 4: and the sewage after the first heat exchange flows into the second heat exchange device from the first heat exchange device to perform secondary heat exchange with cold water in the cooling tower, and is sent into the anaerobic tank after the temperature is reduced to a target temperature.
2. The kitchen waste pretreatment waste heat recycling method according to claim 1, characterized in that in the step 1, the heating tank heats the slurry after secondary pressing through steam in the outer coil pipe, and when the temperature of the slurry reaches more than 80 ℃, the slurry is sent to a three-phase separator for separation.
3. The kitchen waste pretreatment waste heat recycling method according to claim 1, wherein in the step 3, after the low-temperature slurry in the heating tank reaches the capacity, the feeding inlet is closed, and the low-temperature slurry after secondary pressing output by the slurry caching device directly flows into the low-temperature side of the first heat exchange device for circulation so as to exchange heat with the high-temperature sewage flowing through the high-temperature side of the first heat exchange device.
4. The kitchen waste pretreatment waste heat recycling method according to claim 1, characterized in that when the first heat exchange device is overhauled, sewage directly enters the second heat exchange device to exchange heat with cold water in the cooling tower, and when the first heat exchange device is overhauled and is recovered to normal work, the step 2 enters the step 3.
5. The kitchen waste pretreatment waste heat recycling method according to claim 1, wherein the target temperature reached by the secondary heat exchange in step 4 is below 50 ℃.
6. A recycling system for the kitchen waste pretreatment waste heat recycling method according to claim 1, comprising a slurry buffer tank (1) for receiving low-temperature slurry after secondary pressing, more than 1 heating tank (3) for heating the low-temperature slurry, a three-phase separator (5) for separating the heated slurry, a sewage tank (6) for receiving sewage discharged after separation by the three-phase separator (5), a second heat exchanger (11) for exchanging heat for the sewage discharged by the sewage tank (6), and a cooling tower (9) connected to the low-temperature side of the second heat exchanger (11), characterized in that a first heat exchanger (8) for exchanging heat for the sewage discharged by the sewage tank (6) is further provided; wherein the low-temperature slurry outlet end of the slurry cache tank (1) is connected with one end of a first pipeline (12), the other end of the first pipeline (12) is connected with the slurry inlet end of the slurry cache tank (1), the low-temperature slurry outlet end of the slurry cache tank (1) is connected with the liquid inlet of a heating tank (3) through a first pump set (2) which is arranged on the first pipeline (12) and is close to the inlet end, the liquid outlet of the heating tank (3) is connected with a three-phase separator (5) through a second pipeline (13) and a second pump set (4) which is arranged on the second pipeline (13), the water outlet of sewage separated by the three-phase separator (5) is connected with the water inlet of a sewage tank (6) through a pipeline, the water outlet of the sewage tank (6) is connected with the sewage inlet at the high-temperature side of a first heat exchanger (8) through a third pipeline (14) and a third pump set (7) which is arranged on the third pipeline (14), the sewage outlet of the high-temperature side of the first heat exchanger (8) is connected with the water inlet of the high-temperature side of the second heat exchanger (11) through a fourth pipeline (15), the inlet end and the outlet end of the low-temperature side of the first heat exchanger (8) are respectively connected onto the first pipeline (12) and located on the outlet side of the first pump set (2), the water outlet of the high-temperature side of the second heat exchanger (11) is connected with an anaerobic tank, and the low-temperature side of the second heat exchanger (11) is connected with a cooling tower (9) through a fourth pump set (10) and used for cold water circulation.
7. The recycling system according to claim 6, wherein the outlet end of the third pipeline (14) is further connected to the inlet of a fifth pipeline (16), the outlet of the fifth pipeline (16) is connected to the water inlet of the high temperature side of the second heat exchanger (11), wherein the outlet end of the third pipeline (14) is connected to the water inlet end of the high temperature side of the first heat exchanger (8) through a first stop valve (17) and connected to the water inlet end of the high temperature side of the second heat exchanger (11) through a second stop valve (18), respectively.
8. The recycling system according to claim 6, wherein the first pump set (2), the second pump set (4), the third pump set (7) and the fourth pump set (10) have the same structure, and are respectively formed by connecting a main pump pipeline (A) and a standby pump pipeline (B) which have the same structure in parallel, and the main pump pipeline (A) and the standby pump pipeline (B) respectively comprise an inlet stop valve (a), a pump (B), a check valve (c) and an outlet stop valve (d) which are sequentially arranged from an inlet end to an outlet end.
9. A recycling system according to claim 6, characterized in that the outlet end of the high temperature side of the first heat exchanger (8) is provided with a third stop valve (19) and the sewage inlet end of the second heat exchanger (11) is provided with a fourth stop valve (20).
10. A recycling system according to claim 6, characterized in that two sets of valves are arranged on the first pipe (12), wherein one group of valve sets is arranged on the part of the first pipeline (12) after the slurry passes through the inlet end of the last heating tank (3) and consists of an eighth stop valve (26) and a third pneumatic valve (27), the other group of valve sets is arranged on the part of the first pipeline (12) between the slurry inlet and the slurry outlet of the first pump set (2) at the outlet side connected with the low temperature side of the first heat exchanger (8) and consists of a fifth stop valve (22) and a first pneumatic valve (21), a sixth stop valve (24) and a second pneumatic valve (23) are connected in series at the slurry inlet end on the low-temperature side of the first heat exchanger (8), and a seventh stop valve (25) is arranged at the slurry outlet end on the low-temperature side of the first heat exchanger (8).
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010137763A1 (en) * | 2009-05-27 | 2010-12-02 | Moon Sung Kyoon | Wastewater heat recovery device and method thereof |
| CN103894393A (en) * | 2014-04-08 | 2014-07-02 | 四川大学 | Kitchen waste hydrothermal treating method and device |
| CN108088299A (en) * | 2017-12-15 | 2018-05-29 | 张正乾 | Sewage treatment plant's Waste Heat Recovery utilizes cold operation method and system |
| CN209415841U (en) * | 2018-12-18 | 2019-09-20 | 中国石化集团胜利石油管理局有限公司新能源开发中心 | A kind of field joint stations afterheat utilizing system |
| CN211474197U (en) * | 2019-12-18 | 2020-09-11 | 科源能源装备有限公司 | Waste gas waste heat recovery power generation device |
| CN112608006A (en) * | 2020-12-14 | 2021-04-06 | 中国市政工程华北设计研究总院有限公司 | System for cooperative treatment of food waste and municipal sludge and operation process |
| CN214407114U (en) * | 2020-12-31 | 2021-10-15 | 恒力石化（大连）炼化有限公司 | Methanol synthesis reactor outlet gas heat recycling system |
-
2021
- 2021-12-07 CN CN202111480465.8A patent/CN113899235B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010137763A1 (en) * | 2009-05-27 | 2010-12-02 | Moon Sung Kyoon | Wastewater heat recovery device and method thereof |
| CN103894393A (en) * | 2014-04-08 | 2014-07-02 | 四川大学 | Kitchen waste hydrothermal treating method and device |
| CN108088299A (en) * | 2017-12-15 | 2018-05-29 | 张正乾 | Sewage treatment plant's Waste Heat Recovery utilizes cold operation method and system |
| CN209415841U (en) * | 2018-12-18 | 2019-09-20 | 中国石化集团胜利石油管理局有限公司新能源开发中心 | A kind of field joint stations afterheat utilizing system |
| CN211474197U (en) * | 2019-12-18 | 2020-09-11 | 科源能源装备有限公司 | Waste gas waste heat recovery power generation device |
| CN112608006A (en) * | 2020-12-14 | 2021-04-06 | 中国市政工程华北设计研究总院有限公司 | System for cooperative treatment of food waste and municipal sludge and operation process |
| CN214407114U (en) * | 2020-12-31 | 2021-10-15 | 恒力石化（大连）炼化有限公司 | Methanol synthesis reactor outlet gas heat recycling system |
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