Biochemical pool temperature adjusting system and method using discharged sewage

Abstract

The invention provides a biochemical pool temperature adjusting system and method utilizing discharged sewage, the system comprises an aeration fan, a first heat exchanger group, a second heat exchanger group, an aerobic biochemical pool, a discharge pool and a discharge water pump, an air outlet of the aeration fan is communicated with an air inlet of the first heat exchanger group, the first heat exchanger group is connected with the second heat exchanger group in series, and the aerobic biochemical pool is connected with the discharge water pump. An air outlet of the second heat exchanger group is communicated with an air inlet of the aerobic biochemical pool, a water outlet of the aerobic biochemical pool is communicated with a water inlet of the discharge pool, a water outlet of the discharge pool is communicated with a water inlet of the discharge water pump, and a water outlet of the discharge water pump is respectively communicated with a discharge pipeline and a medium inlet of the first heat exchanger group. Unnecessary circulating water waste is avoided, the heat exchange effect of the heat exchanger is improved, energy consumption is reduced, and the operation cost of an enterprise is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of chemical preparation, and in particular to a biochemical pool temperature control system and method utilizing discharged sewage. Background Art

[0002] The method of using microorganisms to treat wastewater is often used in municipal sewage treatment or chemical enterprise sewage treatment. These microorganisms are usually composed of aerobic and anaerobic bacteria. The aerobic bacteria have certain requirements for dissolved oxygen in the wastewater treatment environment. Usually, the dissolved oxygen concentration in the aerobic tank is required to be ≥2.0mg / l to maintain the activity of the bacteria, thereby achieving rapid degradation of COD, ammonia nitrogen and other substances in the wastewater, thereby achieving the purpose of wastewater purification.

[0003] At present, the concentration of dissolved oxygen in aerobic pools is usually achieved by introducing compressed air to the bottom of the pool for aeration, which can increase dissolved oxygen and also play a stirring role. However, compressed air usually relies on compressors to compress the atmosphere, and the temperature is generally over 60°C, and some even exceed 90°C. Too high a temperature is not conducive to the growth of microorganisms, and it needs to be reduced to a suitable temperature through heat exchange before it can be introduced into the biochemical pool. The commonly used heat exchange method is to directly use an ice machine, or use circulating water, chilled water and other media to cool down, which ultimately leads to an increase in energy consumption in the enterprise. Summary of the invention

[0004] In order to solve the above problems in the prior art, the present invention provides a biochemical pool temperature control system and method using discharged sewage, which avoids unnecessary waste of circulating water, improves the heat exchange effect of the heat exchanger, reduces energy consumption, and reduces enterprise operating costs.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] In a first aspect, the present invention provides a biochemical pool temperature control system using discharged sewage, comprising an aeration fan, a first heat exchanger group, a second heat exchanger group, an aerobic biochemical pool, a discharge pool and a discharge water pump, wherein an air outlet of the aeration fan is connected to an air inlet of the first heat exchanger group, the first heat exchanger group and the second heat exchanger group are connected in series, an air outlet of the second heat exchanger group is connected to an air inlet of the aerobic biochemical pool, a water outlet of the aerobic biochemical pool is connected to a water inlet of the discharge pool, a water outlet of the discharge pool is connected to a water inlet of the discharge water pump, and a water outlet of the discharge water pump is connected to an external discharge pipe and a medium inlet of the first heat exchanger group, respectively.

[0007] The beneficial effects of the present invention are as follows: the present invention replaces the multiple heat exchangers originally connected in parallel with a first heat exchanger group and a second heat exchanger group connected in series, and adjusts the heat exchange medium of the first heat exchanger group to free external drainage, performs pre-cooling and cooling through external drainage, and performs secondary cooling through the second heat exchanger group to achieve heat exchange, thereby avoiding unnecessary waste of circulating water, improving the heat exchange effect of the heat exchanger, reducing energy consumption, and reducing enterprise operating costs.

[0008] Optionally, the first heat exchanger group and the second heat exchanger group have one or more heat exchangers connected in parallel;

[0009] The heat exchange medium of the multiple heat exchangers in the second heat exchanger group can be the same or different cold media, and the cold medium is circulating water or chilled water.

[0010] According to the above description, the multiple parallel heat exchangers in the second heat exchanger group can selectively use different cooling medium combinations to meet the cooling requirements of the compressed air and reduce energy consumption.

[0011] Optionally, it further comprises a biochemical water pool, an input water pump, a third heat exchanger group and a fourth heat exchanger group, the water outlet of the biochemical water pool is communicated with the water inlet of the input water pump, the water outlet of the input water pump is communicated with the water inlet of the third heat exchanger group, the third heat exchanger group and the fourth heat exchanger group are connected in series, and the water outlet of the fourth heat exchanger group is communicated with the water inlet of the aerobic biochemical pool;

[0012] The water outlet of the discharge water pump is also connected to the medium inlet of the third heat exchanger group.

[0013] According to the above description, the inlet water of the aerobic biochemical pool is also discharged externally for pre-temperature adjustment, which avoids unnecessary waste of circulating water, improves the heat exchange effect of the heat exchanger, reduces energy consumption, and reduces enterprise operating costs.

[0014] Optionally, the third heat exchanger group and the fourth heat exchanger group have one or more heat exchangers connected in parallel;

[0015] The heat exchange medium of the multiple heat exchangers in the fourth heat exchanger group can be the same or different hot medium, or the same or different cold medium.

[0016] According to the above description, when it is in the southern region with higher temperature, the temperature of the biochemical water pool is too high and needs to be cooled down. When it is in the northern region with lower temperature, the temperature of the biochemical water pool is too low and needs to be heated up to ensure the inlet water temperature in the aerobic biochemical pool.

[0017] Optionally, the water outlet of the discharge water pump adjusts the water outlet ratio entering the external discharge pipe, the first heat exchanger group and the third heat exchanger group according to actual temperature changes.

[0018] In a second aspect, a method for regulating the temperature of a biochemical pool using discharged sewage is provided, using a system for regulating the temperature of a biochemical pool using discharged sewage according to the first aspect, comprising the following steps:

[0019] The aeration fan compresses the air and inputs the obtained compressed air into the first heat exchanger group;

[0020] The compressed air is cooled in turn by the first heat exchanger group and the second heat exchanger group connected in series, and the cooled compressed air is transported to the aerobic biochemical pool, the process wastewater is degraded by the aerobic biochemical pool, and the purified water that meets the quality standards is transported to the discharge pool;

[0021] The discharge pool discharges a portion of the water that meets the quality standards through an external discharge pipe by means of the discharge water pump, and uses another portion of the water that meets the quality standards as the heat exchange medium of the first heat exchanger group.

[0022] Optionally, the method further comprises the steps of:

[0023] The input water pump performs heat exchange on the water in the biochemical water pool through the third heat exchanger group and the fourth heat exchanger group connected in series, and inputs the water reaching a preset temperature into the aerobic biochemical pool;

[0024] The discharge pool also uses a portion of the water that meets the quality standards as the heat exchange medium of the third heat exchanger group through the discharge water pump.

[0025] Optionally, when the water in the biochemical water pool is higher than a preset temperature, the fourth heat exchanger group contains a cold medium for cooling the water in the biochemical water pool;

[0026] When the water in the biochemical water pool is lower than a preset temperature, the fourth heat exchanger group contains a heat medium for heating the water in the biochemical water pool.

[0027] Optionally, the discharge water pump adjusts the ratio of water entering the external discharge pipe and the first heat exchanger according to actual temperature changes.

[0028] Optionally, the actual temperature includes the real-time temperature of the compressed air output by the aeration fan, the real-time stability of the water in the biochemical water pool, the real-time temperature of the quality-compliant water delivered from the discharge pool to the first heat exchanger group and the third heat exchanger group, the real-time temperature of the heat exchange medium in the second heat exchanger group, and the real-time temperature of the heat exchange medium in the fourth heat exchanger.

[0029] Among them, the technical effect corresponding to the temperature control method of a biochemical pool using discharged sewage provided in the second aspect refers to the relevant description of the temperature control system of a biochemical pool using discharged sewage provided in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural schematic diagram of a biochemical pool temperature control system using discharged sewage according to an embodiment of the present invention;

[0031] Figure 2 The present invention is a flow chart of a method for regulating the temperature of a biochemical pool by discharging sewage according to an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1. Aeration fan; 2. First heat exchanger group; 3. Second heat exchanger group; 4. Aerobic biochemical pool; 5. Discharge pool; 6. Discharge water pump; 7. Biochemical water pool; 8. Input water pump; 9. Third heat exchanger group; 10. Fourth heat exchanger group. DETAILED DESCRIPTION

[0034] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0035] Embodiment 1

[0036] The existing biochemical pool temperature control is achieved by using multiple parallel heat exchangers and circulating water in all of the heat exchangers. The existing cooling solutions have the problems of poor cooling effect, large energy loss and large amount of circulating water. This embodiment uses two sets of heat exchanger groups connected in series on the two lines of the aeration air source and the water source, and introduces the external drainage part into one of the heat exchanger groups as the heat exchange medium, thereby avoiding unnecessary waste of circulating water, improving the heat exchange effect of the heat exchanger, reducing energy consumption, reducing the operating costs of the enterprise, and solving the existing problems. The specific improvements are as follows:

[0037] Please refer to Figure 1A biochemical pool temperature control system using discharged sewage includes an aeration fan 1, a first heat exchanger group 2, a second heat exchanger group 3, an aerobic biochemical pool 4, a discharge pool 5, a discharge water pump 6, a biochemical water pool 7, an input water pump 8, a third heat exchanger group 9 and a fourth heat exchanger group 10. Among them. The air outlet of the aeration fan 1 is connected to the air inlet of the first heat exchanger group 2, the first heat exchanger group 2 is connected in series with the second heat exchanger group 3, the air outlet of the second heat exchanger group 3 is connected to the air inlet of the aerobic biochemical pool 4, the water outlet of the biochemical water pool 7 is connected to the water inlet of the input water pump 8, the water outlet of the input water pump 8 is connected to the water inlet of the third heat exchanger group 9, the third heat exchanger group 9 and the fourth heat exchanger group 10 are connected in series, the water outlet of the fourth heat exchanger group 10 is connected to the water inlet of the aerobic biochemical pool 4, the water outlet of the aerobic biochemical pool 4 is connected to the water inlet of the discharge pool 5, the water outlet of the discharge pool 5 is connected to the water inlet of the discharge water pump 6, and the water outlet of the discharge water pump 6 is respectively connected to the external discharge pipe, the medium inlet of the first heat exchanger group 2 and the medium inlet of the third heat exchanger group 9.

[0038] In this embodiment, the first heat exchanger group 2 and the second heat exchanger group 3 have one or more parallel heat exchangers. The heat exchange medium of the multiple heat exchangers in the second heat exchanger group 3 can be the same or different cold medium, and the cold medium is circulating water or chilled water. That is, the heat exchanger can selectively use a combination of different cooling media to achieve the purpose of cooling the compressed air and reducing energy consumption.

[0039] In this embodiment, the third heat exchanger group 9 and the fourth heat exchanger group 10 have one or more parallel heat exchangers; the heat exchange medium of the multiple heat exchangers in the fourth heat exchanger group 10 can be the same or different hot medium, or the same or different cold medium. That is, the temperature adjustment direction of all heat exchangers in the fourth heat exchanger group 10 is consistent. Among them, when it is a relatively high temperature area in the south, the temperature of the biochemical water pool 7 sometimes reaches about 50°, and it needs to be cooled. At this time, the fourth heat exchanger group 10 can contain the same or different cold media; when it is a relatively low temperature area in the north, the temperature of the biochemical water pool 7 is sometimes only about 20°, and it needs to be heated. At this time, the fourth heat exchanger group 10 can contain the same or different hot media to ensure that the inlet water temperature in the aerobic biochemical pool 4 reaches the expected 40°.

[0040] In this embodiment, the water outlet of the discharge water pump 6 adjusts the water outlet ratio entering the external pipe, the first heat exchanger group 2 and the third heat exchanger group 9 according to the actual temperature change. In different seasonal climate conditions, the air source temperature, the water inlet temperature, the water outlet temperature of the discharge water pump 6, etc. will be affected. According to the actual temperature change, the water outlet ratio entering the external pipe, the first heat exchanger group 2 and the third heat exchanger group 9 is adjusted to ensure the cooling demand of the compressed air.

[0041] In this embodiment, the external exhaust pipe includes Figure 1 Municipal pipes in the pipeline or pipes that discharge directly into the environment.

[0042] The working principle of this embodiment refers to that of the second embodiment.

[0043] Embodiment 2

[0044] Please refer to Figure 2 In a second aspect, a biochemical pool temperature control method using discharged sewage, using a biochemical pool temperature control system using discharged sewage of embodiment 1, comprises the following steps:

[0045] S1, the aeration fan 1 compresses the air and inputs the obtained compressed air into the first heat exchanger group 2;

[0046] S2, cooling the compressed air in turn through the first heat exchanger group 2 and the second heat exchanger group 3 connected in series, and delivering the cooled compressed air to the aerobic biochemical pool 4, which degrades the process wastewater and delivers the purified water that meets the quality standards to the discharge pool 5;

[0047] In this embodiment, the heat exchange mediums of the multiple heat exchangers in the second heat exchanger group 3 are selected and combined according to the actual temperature change. For example, when the heat exchange effect is insufficient, chilled water can be used, and when the heat exchange effect is sufficient, circulating water can be used, or a combination of the two can be used.

[0048] In this embodiment, process wastewater refers to wastewater generated by a chemical process, and the aerobic biochemical pool 4 degrades this wastewater to obtain water that meets quality standards.

[0049] S3, the discharge pool 5 discharges part of the water that meets the quality standards through the external discharge pipe through the discharge water pump 6, and uses the other part of the water that meets the quality standards as the heat exchange medium of the first heat exchanger group 2.

[0050] In this embodiment, the steps are also included:

[0051] The input water pump 8 exchanges heat with the water in the biochemical water pool 7 through the third heat exchanger group 9 and the fourth heat exchanger group 10 connected in series, and inputs the water reaching the preset temperature into the aerobic biochemical pool 4;

[0052] Therefore, the discharge tank 5 also uses a part of the water with qualified quality as the heat exchange medium of the third heat exchanger group 9 through the discharge water pump 6. That is, the discharge tank 5 transports the water with qualified quality to the external discharge pipe, the first heat exchanger group 2 and the third heat exchanger group 9 respectively through the discharge water pump 6.

[0053] Among them, when the water in the biochemical water pool 7 is greater than the preset temperature, the fourth heat exchanger group 10 contains a cold medium for cooling the water in the biochemical water pool 7; when the water in the biochemical water pool 7 is less than the preset temperature, the fourth heat exchanger group 10 contains a hot medium for heating the water in the biochemical water pool 7.

[0054] In this embodiment, the discharge water pump 6 adjusts the water ratio entering the external discharge pipe and the first heat exchanger group 2 according to the actual temperature change. Specifically, the actual temperature includes the real-time temperature of the compressed air output by the aeration fan 1, the real-time stability of the water in the biochemical water pool 7, the real-time temperature of the quality-qualified water transported from the discharge pool 5 to the first heat exchanger group 2 and the third heat exchanger group 9, the real-time temperature of the heat exchange medium in the second heat exchanger group 3, and the real-time temperature of the heat exchange medium in the fourth heat exchanger.

[0055] In summary, this embodiment avoids unnecessary waste of circulating water, improves the heat exchange effect of the heat exchanger, reduces energy consumption, and reduces enterprise operating costs.

[0056] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0059] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0060] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A biochemical pool temperature control system using discharged sewage, characterized in that: The invention comprises an aeration fan, a first heat exchanger group, a second heat exchanger group, an aerobic biochemical pool, a discharge pool and a discharge water pump, wherein the air outlet of the aeration fan is connected to the air inlet of the first heat exchanger group, the first heat exchanger group and the second heat exchanger group are connected in series, the air outlet of the second heat exchanger group is connected to the air inlet of the aerobic biochemical pool, the water outlet of the aerobic biochemical pool is connected to the water inlet of the discharge pool, the water outlet of the discharge pool is connected to the water inlet of the discharge water pump, and the water outlet of the discharge water pump is respectively connected to an external discharge pipe and a medium inlet of the first heat exchanger group.

2. A biochemical pool temperature control system using discharged sewage according to claim 1, characterized in that: The first heat exchanger group and the second heat exchanger group have one or more heat exchangers connected in parallel; The heat exchange medium of the multiple heat exchangers in the second heat exchanger group can be the same or different cold media, and the cold medium is circulating water or chilled water.

3. A biochemical pool temperature control system using discharged sewage according to claim 1, characterized in that: It also includes a biochemical water pool, an input water pump, a third heat exchanger group and a fourth heat exchanger group, the water outlet of the biochemical water pool is communicated with the water inlet of the input water pump, the water outlet of the input water pump is communicated with the water inlet of the third heat exchanger group, the third heat exchanger group and the fourth heat exchanger group are connected in series, and the water outlet of the fourth heat exchanger group is communicated with the water inlet of the aerobic biochemical pool; The water outlet of the discharge water pump is also connected to the medium inlet of the third heat exchanger group.

4. A biochemical pool temperature control system using discharged sewage according to claim 3, characterized in that: The third heat exchanger group and the fourth heat exchanger group have one or more heat exchangers connected in parallel; The heat exchange medium of the multiple heat exchangers in the fourth heat exchanger group can be the same or different hot medium, or the same or different cold medium.

5. A biochemical pool temperature control system using discharged sewage according to claim 3, characterized in that: The water outlet of the discharge water pump adjusts the water outlet ratio entering the external discharge pipe, the first heat exchanger group and the third heat exchanger group according to the actual temperature change.

6. A method for regulating the temperature of a biochemical pool using discharged sewage, using a biochemical pool temperature regulating system using discharged sewage as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: The aeration fan compresses the air and inputs the obtained compressed air into the first heat exchanger group; The compressed air is cooled in turn by the first heat exchanger group and the second heat exchanger group connected in series, and the cooled compressed air is transported to the aerobic biochemical pool, the process wastewater is degraded by the aerobic biochemical pool, and the purified water that meets the quality standards is transported to the discharge pool; The discharge pool discharges a portion of the water that meets the quality standards through an external discharge pipe by means of the discharge water pump, and uses another portion of the water that meets the quality standards as the heat exchange medium of the first heat exchanger group.

7. A biochemical pool temperature control method using discharged sewage according to claim 6, characterized in that: Also includes the steps: The input water pump performs heat exchange on the water in the biochemical water pool through the third heat exchanger group and the fourth heat exchanger group connected in series, and inputs the water reaching a preset temperature into the aerobic biochemical pool; The discharge pool also uses a portion of the water that meets the quality standards as the heat exchange medium of the third heat exchanger group through the discharge water pump.

8. A biochemical pool temperature control method using discharged sewage according to claim 7, characterized in that: When the water in the biochemical water pool is higher than a preset temperature, the fourth heat exchanger group contains a cold medium for cooling the water in the biochemical water pool; When the water in the biochemical water pool is lower than a preset temperature, the fourth heat exchanger group contains a heat medium for heating the water in the biochemical water pool.

9. A biochemical pool temperature control method using discharged sewage according to claim 8, characterized in that: The discharge water pump adjusts the water outlet ratio entering the external discharge pipe and the first heat exchanger according to actual temperature changes.

10. A biochemical pool temperature control method using discharged sewage according to claim 9, characterized in that: The actual temperature includes the real-time temperature of the compressed air output by the aeration fan, the real-time stability of the water in the biochemical water pool, the real-time temperature of the quality-compliant water delivered from the discharge pool to the first heat exchanger group and the third heat exchanger group, the real-time temperature of the heat exchange medium in the second heat exchanger group, and the real-time temperature of the heat exchange medium in the fourth heat exchanger.

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