CN216764377U

CN216764377U - Circulating system for evaporating sewage by utilizing ceramsite to recover waste heat

Info

Publication number: CN216764377U
Application number: CN202122881413.3U
Authority: CN
Inventors: 胡犇
Original assignee: Chongqing Bofan Environmental Treatment Co ltd
Current assignee: Chongqing Bofan Environmental Treatment Co ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-06-17
Anticipated expiration: 2031-11-23

Abstract

The utility model belongs to the technical field of waste heat recovery circulation systems, and particularly discloses a circulation system for evaporating sewage by using ceramsite to recover waste heat, which comprises a heat collecting system, an evaporation system, a water supply system and an air-water cooling separation system; the heat collecting system is used for collecting hot air and conveying the hot air to an air heating pipe of the evaporating pot; the water supply system is connected with the sewage tank through a water supply pipe; the water supply system is connected with the evaporating pot through a drain pipe; the outlet end of the wind heat pipe is connected with the sewage tank; the inlet of the gas-water cooling separation system is connected with a centrifugal fan, the water inlet end of the gas-water cooling separation system is used for connecting cooling water, the water outlet end of the gas-water cooling separation system is used for discharging water after heat exchange, and the outlet of the gas-water cooling separation system is connected with a three-way pipe for separating gas and water. Above-mentioned system can solve among the prior art rotary kiln heat not collect, water gas, inorganic salt and silt behind the sewage treatment are not utilized and lead to the problem of wasting of resources.

Description

Circulating system for evaporating sewage by utilizing ceramsite to recover waste heat

Technical Field

The utility model belongs to the technical field of waste heat recovery circulation systems, and particularly relates to a circulation system for evaporating sewage by using ceramsite to recover waste heat.

Background

Rotary kilns are widely used in many production industries, such as building materials, metallurgy, chemical engineering, environmental protection, etc., for mechanical, physical or chemical treatment of solid materials by using rotary cylinder equipment. The waste heat of the ceramsite from a kiln outlet reaches 600 ℃, and no heat energy collection measure is taken, so that the waste is wasted. In sewage treatment, an evaporation pan is needed to heat sewage to separate water, gas, inorganic salts and silt in the sewage, but in the process, the evaporated water gas and concentrated inorganic salts and silt are not utilized.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a circulating system for evaporating sewage by using ceramsite to recover waste heat, and aims to solve the problem that in the prior art, resources are wasted because heat of a rotary kiln is not collected and water vapor, inorganic salt and silt after sewage treatment are not utilized.

In order to achieve the purpose, the technical scheme of the utility model is as follows: the circulating system for evaporating sewage by using the recovered waste heat of the ceramsite comprises a heat collecting system, an evaporation system, a water supply system and an air-water cooling separation system; the heat collecting system is used for collecting hot air carrying waste heat of the ceramsite from the rotary furnace and conveying the hot air into an air heating pipe of the evaporation pot; the air heat pipe is used for carrying out heat exchange on the sewage in the evaporating pot; the water supply system is connected with the sewage tank through a water supply pipe, water in the sewage tank can flow to the water supply system through the water supply pipe, and the water supply pipe is provided with a first check valve; the water supply system is connected with the evaporation pot through a drain pipe, water in the water supply system can flow to the evaporation pot through the drain pipe, and a second check valve is arranged on the drain pipe; the outlet end of the air heat pipe is connected with the bottom of the sewage pool through a connecting pipe, hot air flowing out of the air heat pipe is conveyed into the sewage pool through the connecting pipe to preheat sewage, and a third check valve is arranged on the connecting pipe; the inlet of the gas-water cooling separation system is connected with a centrifugal fan, and the centrifugal fan is used for pumping steam in the evaporating pot; the water inlet end of the gas-water cooling and separating system is used for being connected with cooling water, the water outlet end of the gas-water cooling and separating system is used for discharging water after heat exchange, the outlet of the gas-water cooling and separating system is connected with a three-way pipe used for separating gas and water, the gas is sent into the rotary kiln through a gas pipe of the three-way pipe, and the water is sent into the first collecting device through a water pipe of the three-way pipe for recycling.

Further, the water supply system comprises a water supply tank, the water supply tank is positioned above the evaporating pot, and the bottom of the water supply tank is connected with the middle part of the evaporating pot through the drain pipe; the centrifugal fan is connected with the upper part of the evaporating pot through the air outlet pipe and is used for keeping the evaporating pot in a semi-vacuum state.

Further, the outlet and the inlet of the gas-water cooling separation system are connected through a cooling pipe, and the cooling pipe is arranged in a snake shape in the gas-water cooling separation system.

Further, the pipe diameter of the water supply pipe is half of that of the drain pipe.

Further, a fourth check valve is arranged on the air outlet pipe.

Further, the bottom of evaporating pot is equipped with the mud pipe, be equipped with first valve on the mud pipe, the mud pipe is used for discharging inorganic salt and silt in the evaporating pot into the second collection device and recycles.

Further, the trachea sets up vertically upwards, the water pipe sets up vertically downwards.

Furthermore, the wind heat pipes are distributed in the evaporating pan in the transverse direction and the longitudinal direction.

Furthermore, the bottom of the evaporating pot is designed to be conical, and the evaporated inorganic salt and silt are deposited at the bottom of the evaporating pot.

Further, the top of feed-tank is equipped with the moisturizing pipe, is equipped with the second valve on the moisturizing pipe, still be equipped with the blast pipe on the feed-tank, be equipped with discharge valve on the blast pipe.

The working principle of the technical scheme is as follows: firstly, the second check valve of the drain pipe is closed, the second valve and the exhaust valve are opened, water is added into the water supply tank through the water replenishing pipe until the water supply tank is full, and the water in the water supply tank cannot flow to the sewage pool due to the fact that the first check valve is arranged on the water supply pipe. And the centrifugal fan is turned on, so that the evaporation pan is in a semi-vacuum state. After the water is filled, the second valve and the exhaust valve are closed, the first check valve and the second check valve are opened, the water flows into the evaporating pan by the gravity of the water, and the water discharge can be automatically stopped when the water level in the evaporating pan is consistent with the water level at the end part of the water discharge pipe (siphon principle). When the water supply tank adds water into the evaporating pot, the water level of the water supply tank is reduced to form negative pressure, and the water in the sewage pool is fed into the water supply tank through the water supply pipe under the action of atmospheric pressure, so that the sewage pool, the water supply tank and the evaporating pot are integrated into a whole to form a siphon effect, and automatic water supplement and automatic water cut-off are realized.

The heat collecting system sends the collected waste heat brought by the ceramsite into the wind heat pipe of the evaporating pot, and at the moment, the hot air in the wind heat pipe reaches more than 150 ℃, so that heat exchange can be rapidly carried out between the hot air and the sewage. Because the centrifugal fan forms a semi-vacuum in the evaporating pan, the sewage can be boiled at about 60 ℃ to form water vapor. The water vapor is pumped out from the air outlet pipe of the evaporating pot by a centrifugal fan and enters the cooling pipe for condensation through the inlet of the gas-water cooling and separating system, the condensed water and the residual gas (the mixed gas of ammonia gas, hydrogen sulfide, carbon dioxide and the like) are separated at the three-way pipe, the water is discharged from the downward water pipe, and the gas is discharged from the upward gas pipe and is sent into the rotary kiln for incineration.

The residual air after heat exchange with the sewage through the evaporation pan has a certain temperature (about 60 ℃), and the residual air is discharged into the bottom of the sewage tank through the connecting pipe to preheat the sewage. The connecting pipe is provided with a third check valve, hot air flows out of the third check valve, but water cannot flow in from the third check valve.

The evaporated concentrate (inorganic salt and a small amount of silt) is deposited on the cone part of the evaporation pan, the concentrate can be discharged by opening the first valve according to the requirement, and the concentrate can be sent to a workshop to be mixed into the production raw materials of the ceramsite for recycling.

The beneficial effects of this technical scheme lie in: the technical scheme is that the waste heat of the ceramsite discharged from the rotary kiln is collected and sent to the evaporation pot to heat the sewage, so that water, gas, inorganic salt and silt in the sewage are separated, finally, water generated by steam condensation can be recycled, the concentrated residue containing inorganic salt and silt can be mixed into production raw materials of the ceramsite to be fired into the ceramsite, and the gas obtained after steam cooling and separation is sent to the rotary furnace to be burned, so that resources are saved, recycling is realized, and no pollution is caused to the atmosphere and the environment.

Drawings

FIG. 1 is a schematic connection diagram of a circulation system for evaporating sewage by using ceramsite recovered waste heat.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises an evaporation pan 1, a sewage pool 2, a water supply tank 3, a gas-water cooling separation system 4, a water supply pipe 5, a water discharge pipe 6, a wind-heat pipe 7, a sludge discharge pipe 8, a connecting pipe 9, an air outlet pipe 10, a centrifugal fan 11, a cooling pipe 12, an air pipe 13, a water pipe 14, a water inlet end 15, a water outlet end 16, a water replenishing pipe 17, an air outlet pipe 18, a first check valve 19, a second check valve 20, an exhaust valve 21, a first valve 22, a second check valve 23, a third check valve 24 and a fourth check valve 25.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment is basically as shown in the attached figure 1: the circulating system for evaporating sewage by using the waste heat recovered by the ceramsite comprises a heat collecting system, an evaporation system, a water supply system and an air-water cooling separation system 4; the heat collecting system is used for collecting hot air with waste heat brought out from the rotary furnace by the ceramsite and conveying the hot air into the air heating pipe 7 of the evaporation pot 1, the heat collecting system adopts a fan (centrifugal type) and a sealing device, the fan collects the hot air in the ceramsite and conveys the hot air into the air heating pipe 7, and the sealing device can provide a sealing environment for conveying the hot air and avoid the hot air from flowing out. The air heat pipes 7 are used for carrying out heat exchange on sewage in the evaporation pan 1, and the air heat pipes 7 are distributed in the evaporation pan 1 in the transverse direction and the longitudinal direction. The water supply system is connected with the sewage tank 2 through a water supply pipe 5, water in the sewage tank 2 can flow to the water supply system through the water supply pipe 5, and a first check valve 19 is arranged on the water supply pipe 5. The water supply system comprises a water supply tank 3, the water supply tank 3 is positioned above the evaporating pot 1, a water replenishing pipe 17 is arranged at the top of the water supply tank 3, a second valve 20 is arranged on the water replenishing pipe 17, an exhaust pipe 18 is also arranged at the top of the water supply tank 3, and an exhaust valve 21 is arranged on the exhaust pipe 18. The bottom of the water supply tank 3 is connected with the middle part of the evaporating pot 1 through a water discharge pipe 6, a second check valve 23 is arranged on the water discharge pipe 6, and the pipe diameter of the water supply pipe 5 is half of that of the water discharge pipe 6. The centrifugal fan 11 is connected with the upper part of the evaporating pot 1 through an air outlet pipe 10, a fourth check valve 25 is arranged on the air outlet pipe 10, and the centrifugal fan 11 is used for keeping the evaporating pot 1 in a semi-vacuum state. The outlet end of the wind heat pipe 7 is connected with the bottom of the sewage tank 2 through a connecting pipe 9, hot wind flowing out of the wind heat pipe 7 is conveyed into the sewage tank 2 through the connecting pipe 9 to preheat sewage, and a third check valve 24 is arranged on the connecting pipe 9. The inlet of the gas-water cooling separation system 4 is connected with a centrifugal fan 11, and the centrifugal fan 11 is used for pumping steam in the evaporating pot 1; the end 15 of intaking of air water cooling separation system 4 is used for inserting the cooling water, the play water end 16 of air water cooling separation system 4 is used for discharging the water after the heat exchange, the exit linkage of air water cooling separation system 4 has the three-way pipe that is used for separating gas and water, gas is sent into in the rotary kiln through the trachea 13 of three-way pipe, water is sent into first collection device through the water pipe 14 of three-way pipe and is recycled, the vertical upwards setting of trachea 13, the vertical downward setting of water pipe 14. The outlet and the inlet of the gas-water cooling separation system 4 are connected through a cooling pipe 12, and the cooling pipe 12 is arranged in a snake shape in the gas-water cooling separation system. The bottom of the evaporating pot 1 is set to be conical, and the evaporated inorganic salt and silt are deposited at the bottom of the evaporating pot 1. The bottom of the evaporating pot 1 is provided with a sludge discharge pipe 8, the sludge discharge pipe 8 is provided with a first valve 22, and the sludge discharge pipe 8 is used for discharging inorganic salt and silt in the evaporating pot 1 into a second collecting device for reuse.

The specific implementation process is as follows:

first, the second check valve 23 of the drain pipe 6 is closed, the second valve 20 and the exhaust valve 21 are opened, and water is supplied into the water supply tank 3 through the water supply pipe 17 until the water supply tank is filled up, and since the first check valve 19 is provided in the water supply pipe 5, the water in the water supply tank 3 does not flow into the wastewater tank 2. And the centrifugal fan 11 is turned on so that the inside of the evaporating pot 1 is in a semi-vacuum state. After the water is filled, the second valve 20 and the exhaust valve 21 are closed, the first check valve 19 and the second check valve 23 are opened, and the water flows into the evaporation pan 1 by the self gravity until the water level in the evaporation pan 1 is consistent with the water level at the end of the drain pipe 6, and the water discharge is automatically stopped (siphon principle). When the water tank 3 adds water into the evaporating pot 1, the water level of the water tank 3 is reduced to form negative pressure, and the water in the sewage pool 2 is fed into the water tank 3 through the water feeding pipe 5 under the action of atmospheric pressure, so that the sewage pool 2, the water tank 3 and the evaporating pot 1 form siphon effect in a three-in-one manner, and automatic water supplement and automatic water cut-off are realized.

The heat collecting system sends the collected waste heat brought by the ceramsite into the wind-heat pipe 7 of the evaporating pot 1, and at the moment, the hot wind in the wind-heat pipe 7 reaches more than 150 ℃, so that heat exchange can be rapidly carried out between the hot wind and the sewage. Because the centrifugal fan 11 forms a semi-vacuum in the evaporating pot 1, the sewage can be boiled at about 60 ℃ to form water vapor. The water vapor is extracted from an air outlet pipe 10 of the evaporating pot 1 by a centrifugal fan 11 and enters a cooling pipe 12 through an inlet of the air-water cooling and separating system 4 for condensation, the condensed water and the residual gas (the mixed gas of ammonia gas, hydrogen sulfide, a carbon dioxide flow, carbon dioxide and the like) are separated at a three-way pipe, the water is discharged from a downward water pipe 14, and the gas is discharged from an upward air pipe 13 and is sent into the rotary kiln for incineration.

The residual air after heat exchange with the sewage through the evaporation pan 1 has a certain temperature (about 60 ℃), and the residual air is discharged into the bottom of the sewage pool 2 through the connecting pipe 9 to preheat the sewage. A third check valve 24 is installed on the connection pipe 9, and hot air is discharged from the third check valve 24, but water is not introduced from the third check valve 24.

The evaporated concentrate (inorganic salt and a small amount of silt) is deposited on the cone part of the evaporation pan 1, the first valve 22 can be opened according to the requirement, the concentrate can be discharged, and the concentrate can be sent to a workshop to be mixed into the production raw materials of the ceramsite for recycling.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art, and it will be appreciated by those skilled in the art that the present invention has been made available to those skilled in the art after the filing date or priority date, and that the present invention may be implemented by those skilled in the art by applying ordinary skill in the art, without departing from the spirit and scope of the present invention. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. Utilize haydite to retrieve circulation system that waste heat evaporates to sewage, its characterized in that: comprises a heat receiving system, an evaporation system, a water supply system and an air-water cooling separation system; the heat collecting system is used for collecting hot air carrying waste heat of the ceramsite from the rotary furnace and conveying the hot air into an air heating pipe of the evaporation pot; the air heat pipe is used for carrying out heat exchange on the sewage in the evaporating pot; the water supply system is connected with the sewage tank through a water supply pipe, water in the sewage tank can flow to the water supply system through the water supply pipe, and the water supply pipe is provided with a first check valve; the water supply system is connected with the evaporation pot through a drain pipe, water in the water supply system can flow to the evaporation pot through the drain pipe, and a second check valve is arranged on the drain pipe; the outlet end of the air heat pipe is connected with the bottom of the sewage pool through a connecting pipe, hot air flowing out of the air heat pipe is conveyed into the sewage pool through the connecting pipe to preheat sewage, and a third check valve is arranged on the connecting pipe; the inlet of the gas-water cooling separation system is connected with a centrifugal fan, and the centrifugal fan is used for pumping steam in the evaporating pot; the water inlet end of the gas-water cooling and separating system is used for connecting cooling water, the water outlet end of the gas-water cooling and separating system is used for discharging water after heat exchange, the outlet of the gas-water cooling and separating system is connected with a three-way pipe used for separating gas and water, the gas is sent into the rotary kiln through a gas pipe of the three-way pipe, and the water is sent into the first collecting device through a water pipe of the three-way pipe for recycling.

2. The circulation system for evaporating sewage by using ceramsite recycling waste heat according to claim 1, is characterized in that: the water supply system comprises a water supply tank, the water supply tank is positioned above the evaporating pot, and the bottom of the water supply tank is connected with the middle part of the evaporating pot through the drain pipe; the centrifugal fan is connected with the upper part of the evaporating pot through an air outlet pipe and is used for keeping the evaporating pot in a semi-vacuum state.

3. The circulation system for evaporating sewage by using ceramsite recycling waste heat according to claim 1, is characterized in that: the outlet and the inlet of the gas-water cooling separation system are connected through a cooling pipe, and the cooling pipe is arranged in a snake shape in the gas-water cooling separation system.

4. The circulation system for evaporating sewage by using ceramsite recycling waste heat according to claim 2, is characterized in that: the pipe diameter of the water supply pipe is half of that of the drain pipe.

5. The circulation system for evaporating sewage by using ceramsite recycling waste heat according to claim 2, is characterized in that: and a fourth check valve is arranged on the air outlet pipe.

6. The circulation system for evaporating sewage by using ceramsite recycling waste heat according to claim 1, is characterized in that: the bottom of evaporating pan is equipped with the mud pipe, be equipped with first valve on the mud pipe, the mud pipe is used for discharging inorganic salt and silt in the evaporating pan into in the second collection device and recycles.

7. The circulation system for evaporating sewage by using ceramsite recycling waste heat according to claim 2, is characterized in that: the trachea sets up vertically upwards, the water pipe sets up vertically downwards.

8. The circulation system for evaporating sewage by using ceramsite recycling waste heat according to claim 1, is characterized in that: the air heat pipes are distributed in the transverse direction and the longitudinal direction in the evaporating pan.

9. The circulation system for evaporating sewage by using ceramsite recycling waste heat according to claim 6, is characterized in that: the bottom of the evaporating pot is designed to be conical, and the evaporated inorganic salt and silt are deposited at the bottom of the evaporating pot.

10. The circulation system for evaporating sewage by using ceramsite recycling waste heat according to claim 2, is characterized in that: the water supply tank is characterized in that a water replenishing pipe is arranged at the top of the water supply tank, a second valve is arranged on the water replenishing pipe, an exhaust pipe is further arranged on the water supply tank, and an exhaust valve is arranged on the exhaust pipe.