Boiler blow-off heat energy recovery and aeration adjustment combined system
By recovering boiler waste heat for temperature regulation and sediment tumbling in the aeration tank, the problem of increased system pressure and control difficulty in existing technologies is solved, achieving efficient waste heat utilization and enhanced microbial activity.
Patent Information
- Application Number
- CN202423044241.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Existing boiler heat recovery technologies increase system pressure and control difficulty, and have limited economic benefits, making it difficult to effectively utilize wastewater heat for temperature regulation and sediment treatment.
The boiler blowdown heat energy is recovered and used for water temperature regulation in the aeration tank. After being recovered, the heat energy is introduced into the aeration tank through a heat exchange unit and blower system. The recovered heat energy is then used for aeration regulation combined system through a heat exchange unit and blower system. The recovered heat energy is then used for temperature regulation in the aeration tank, thereby regulating the temperature of the aerobic tank and the aeration tank, achieving temperature regulation and sediment tumbling.
It improved microbial activity, enhanced decomposition performance, reduced system pressure and control difficulty, enabled the effective utilization of waste heat and tumbling of precipitates, and achieved temperature regulation and precipitate tumbling, thereby improving treatment efficiency.
Smart Images
Figure CN223636148U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a boiler blowdown technical field more specifically, relate to a kind of boiler blowdown heat energy recovery and aeration adjustment combined system. BACKGROUND
[0002] Boiler will produce certain sewage in daily operation process, need to be discharged regularly, regularly and handled, generally, the blowdown water of boiler will be recycled to a certain extent, such as heat energy recovery, water purification recovery etc., to play the effect of energy saving and emission reduction.
[0003] At present, the heat energy recovery of boiler is mainly used to form the heat energy of boiler preheating itself or the supplement of steam heat energy, but the process of steam heat energy and boiler preheating needs to connect the pipeline of recycled heat energy into steam pipeline, and steam pipeline requires very high sealing performance to ensure safety, this heat energy recovery means substantially increases the number of interfaces in pipeline, and since blowdown process is not performed all the time, but is started at intervals, it also needs corresponding control valve to control, in actual operation process, the waste heat utilization of this degree is used to main heat generating system (steam system) from various aspects, substantially increases system pressure and control difficulty, and the economic benefit brought is very limited.
[0004] To change this situation, seeking other utilization means of boiler heat energy is a new problem that the person skilled in the art urgently needs to solve. CONTENT OF UTILITY MODEL
[0005] An object of the utility model is to provide a new technical scheme of boiler blowdown heat energy recovery and aeration adjustment combined system, recycle the heat energy generated in the process of boiler blowdown for water temperature regulation of aeration tank, so that microorganisms in aeration tank are always maintained in a relatively active environment, and decomposition performance is improved.
[0006] According to the first aspect of the utility model, a boiler blowdown heat energy recovery and aeration adjustment combined system is provided, which comprises a boiler, an expansion vessel, a first heat exchange unit, a regulation tank and an aerobic tank.
[0007] The blowdown pipe of the boiler is communicated with the expansion vessel, the first heat exchange unit is arranged in the expansion vessel, the inlet end of the first heat exchange unit is communicated with air through a first air blower, and the outlet end of the first heat exchange unit is connected with two distribution branches through a second air blower.
[0008] The first branch is communicated with the aerobic tank through a main valve, and the second branch is communicated with the regulation tank through a regulation valve.
[0009] Optionally, according to the boiler blowdown heat energy recovery and aeration adjustment combined system, the first air blower and the second air blower are linked with the on-off valve on the blowdown pipe.
[0010] Optionally, the boiler blowdown heat energy recovery and aeration adjustment combined system, the first heat exchange unit is a tubular heat exchange unit, the first heat exchange unit cooperates with the expansion vessel to form a tubular heat exchanger, and the tubular heat exchanger is used for recovering blowdown heat energy.
[0011] Optionally, the boiler blowdown heat energy recovery and aeration adjustment combined system, the first branch extends to the bottom of the aerobic tank, and forms two layers of pipelines, the first branch is connected with the bottom layer of the pipelines and is used for heat exchange, the bottom layer of the pipelines is connected with the upper layer of the pipelines, and an air outlet is arranged in the upper layer of the pipelines and is used for aeration.
[0012] Optionally, the boiler blowdown heat energy recovery and aeration adjustment combined system, the bottom layer of the pipelines is a coiled pipe structure.
[0013] Optionally, the boiler blowdown heat energy recovery and aeration adjustment combined system, the upper layer of the pipelines is an aeration pipe with one inlet and multiple outlets, and the upper end of the aeration pipe is provided with the air outlet.
[0014] Optionally, the boiler blowdown heat energy recovery and aeration adjustment combined system, the second branch extends to the bottom end of the adjustment tank, the second branch forms a coiled shape at the bottom end of the adjustment tank, and the second branch is provided with the air outlet at the part located at the bottom end of the adjustment tank and is used for stirring the soil at the bottom of the adjustment tank.
[0015] Optionally, the boiler blowdown heat energy recovery and aeration adjustment combined system, the air outlet at the end of the second branch faces the bottom or is inclined downward.
[0016] Optionally, the boiler blowdown heat energy recovery and aeration adjustment combined system further comprises a supplementary heat source, and the supplementary heat source is directly connected with the first branch and is used for supplementing heat energy.
[0017] Optionally, the boiler blowdown heat energy recovery and aeration adjustment combined system, temperature sensors are arranged in the aerobic tank and the adjustment tank.
[0018] Compared with the prior art, the boiler blowdown heat energy recovery and aeration adjustment combined system has substantial characteristics and progress, and specifically, the boiler blowdown heat energy recovery and aeration adjustment combined system can fully utilize waste heat generated by blowdown, and is used for temperature adjustment of an aerobic tank, the aerobic tank generally does not have temperature adjustment capability in a blowdown treatment link, and a general treatment method is to adjust an aeration amount according to seasonal temperature changes to meet the needs of microorganisms, and the present application utilizes waste heat for temperature adjustment of the aerobic tank, so that the temperature in the aerobic tank is always in a relatively comfortable temperature range, microorganism activity is improved, and treatment efficiency is improved.
[0019] When the hot air is sufficient, the excess air is introduced into the adjusting pool to pre-adjust the water temperature in the adjusting pool and to roll the precipitates in the adjusting pool to avoid precipitation.
[0020] When the hot air is insufficient, a supplementary heat source is arranged to supply heat energy from the first branch to the aerobic pool.
[0021] Other features of the present application, and their particular advantages, will be further understood and appreciated from the following detailed description of exemplary embodiments of the present application, with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS
[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.
[0023] Fig. 1 is the principle diagram of the boiler blowdown heat energy recovery and aeration adjustment combined system in the present application.
[0024] Fig. 2 is the distribution diagram of the bottom layer pipeline of the aerobic pool in the boiler blowdown heat energy recovery and aeration adjustment combined system in the present application.
[0025] Fig. 3 is the distribution diagram of the bottom double-layer pipeline of the aerobic pool in the boiler blowdown heat energy recovery and aeration adjustment combined system in the present application.
[0026] BRIEF DESCRIPTION OF DRAWINGS
[0027] 1-boiler; 2-blowdown pipe; 3-expander; 4-first heat exchange unit; 5-first air blower; 6-second air blower; 7-adjusting pool; 8-aerobic pool; 9-on-off valve; 11-first branch; 12-main valve; 13-second branch; 14-adjusting valve; 15-upper layer pipeline; 16-air outlet; 17-bottom layer pipeline. DETAILED DESCRIPTION
[0028] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. If noted otherwise, the relative arrangement, numerical expressions, and values of components and steps set forth in these embodiments do not limit the scope of the present application.
[0029] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way limiting to the scope of the application or its applications or uses.
[0030] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and apparatus can be considered as part of the description of the present application.
[0031] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.
[0032] As Figs. 1 to 3 shown in the drawings, a boiler blowdown heat energy recovery and aeration conditioning combined system, comprising a boiler 1, an expansion vessel 3, a first heat exchange unit 4, a conditioning pool 7 and an aerobic pool 8.
[0033] The blowdown pipe 2 of the boiler 1 is communicated with the expansion vessel 3, the first heat exchange unit 4 is arranged in the expansion vessel 3, the first heat exchange unit 4 is a tubular heat exchange unit, the inlet end of the first heat exchange unit 4 is communicated with air through the first air blower 5, and the outlet end of the first heat exchange unit 4 is connected with two distribution branches through the second air blower 6; in this embodiment, the first heat exchange unit 4 cooperates with the expansion vessel 3 to form a shell-and-tube heat exchanger, which is used for recovering blowdown heat energy.
[0034] The first air blower 5 and the second air blower 6 are all linked with the on-off valve 9 on the blowdown pipe 2, in the blowdown process, the whole function module of waste heat recovery is started, and in the non-blowdown process, a supplementary heat source such as supplementary hot air is introduced from the first branch 11 to realize the continuous supply of the heat source to the aerobic pool 8.
[0035] The first branch 11 is communicated with the aerobic pool 8 through the main valve 12, and the second branch 13 is communicated with the conditioning pool 7 through the regulating valve 14.
[0036] Specifically, the end of the first branch 11 extends to the bottom of the aerobic pool 8 and forms two layers of pipelines, the first branch 11 is communicated with the bottom layer pipeline 17 for heat exchange, and the bottom layer pipeline 17 is a serpentine distributed coil structure.
[0037] The bottom layer pipeline 17 is further communicated with the upper layer pipeline 15, the upper layer pipeline 15 is provided with the air outlet 16 for aeration, and in this embodiment, the upper layer pipeline 15 is a distribution type aeration pipe with one inlet and multiple outlets, and the upper end of the aeration pipe is provided with the air outlet 16.
[0038] The second branch 13 extends to the bottom end of the conditioning pool 7, the second branch 13 forms a coiled shape at the bottom end of the conditioning pool 7, the part of the second branch 13 located at the bottom end of the conditioning pool 7 is provided with the air outlet 16, and the air outlet 16 at the end of the second branch 13 is directed to the bottom or obliquely downward, which is used for driving the soil at the bottom of the conditioning pool 7 to roll.
[0039] Temperature sensors are installed in the aerobic pool 8 and the conditioning pool 7, which are used for monitoring the temperature change so as to adjust the distribution ratio of the airflow in the first branch 11 and the second branch 13.
[0040] Working principle is explained as follows:
[0041] The main component of the blowdown is a mixture of sludge and water, which has high heat, and is first introduced into the expansion vessel 3. The blowdown component is buffered in the expansion vessel 3, and at the same time exchanges heat with the first heat exchange unit 4 arranged in the expansion vessel 3. The air introduced into the first heat exchange unit 4 is heated. The heated air is introduced into the aerobic tank 8 through the first branch 11 under the guidance of the second air blower 6, and exchanges heat with the water in the aerobic tank 8 in the bottom coil of the aerobic tank 8. Since the amount of blowdown is limited, the total amount of heat is not large, and will not cause a large increase in the temperature of the aerobic tank 8. Moreover, most of the aerobic tanks 8 are arranged in open spaces, and the heat energy is not easy to accumulate, and will not cause the temperature of the aerobic tank 8 to be too high and fail.
[0042] When the heat energy is indeed extremely excessive, such as in high-temperature weather in summer, the second branch 13 of the adjustment tank 7 can be started to guide most of the airflow into the adjustment tank 7. The capacity of the adjustment tank 7 is usually much larger than that of the aerobic tank 8, and is usually arranged in the open air. The hot air introduced into the adjustment tank 7 can fine-tune the water temperature of the adjustment tank 7. Moreover, due to the aeration requirement, the outflow speed is high, and the outflow port 16 in the adjustment tank 7 can be downward or obliquely downward, which is used to roll up the precipitates in the adjustment tank 7 to prevent precipitation, and is beneficial to the normal operation of the water treatment.
[0043] Although some specific embodiments of the utility model have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, and are not intended to limit the scope of the utility model. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.
Claims
1. A boiler blowdown heat recovery and aeration conditioning combined system, characterized in that, The device comprises a boiler, an expander, a first heat exchange unit, a regulating pool and an aerobic pool. The boiler is connected to the expander through a blowdown pipe, and the expander is provided with the first heat exchange unit. The first branch is connected to the aerobic pool through a main valve, and the second branch is connected to the regulating pool through a regulating valve.
2. The combined system for heat recovery and aeration adjustment of boiler blowdown according to claim 1, wherein The first and second blowers are connected to the on-off valve on the blowdown pipe.
3. The boiler blowdown heat recovery and aeration conditioning combined system according to claim 2, wherein The first heat exchange unit is a tubular heat exchange unit, and the first heat exchange unit and the expander constitute a tubular heat exchanger for recovering heat energy.
4. The boiler blowdown heat recovery and aeration conditioning system of claim 1, wherein, The first branch extends to the bottom of the aerobic pool and forms two layers of pipes.
5. The boiler blowdown heat recovery and aeration conditioning combined system according to claim 4, wherein The bottom layer of pipes is in the form of a coiled pipe.
6. The boiler blowdown heat recovery and aeration conditioning combined system according to claim 4, wherein The upper layer of pipes is in the form of a multi-outlet aeration pipe.
7. The combined heat recovery and aeration adjustment system for boiler blowdown according to claim 1, wherein The second branch extends to the bottom of the regulating pool and forms a coiled pipe.
8. The boiler blowdown heat recovery and aeration conditioning combined system according to claim 7, wherein The outlet of the second branch at the bottom of the regulating pool is used to stir the soil at the bottom of the regulating pool.
9. The combined heat recovery and aeration adjustment system for boiler blowdown according to claim 1, wherein The device further comprises a supplementary heat source connected to the first branch.
10. The boiler blowdown heat recovery and aeration conditioning combined system of claim 9, wherein, The aerobic pool and the regulating pool are provided with temperature sensors.