Ozone gas-dissolved water generation device and sludge conditioning system

Abstract

The utility model relates to the technical field of environmental protection equipment, and discloses an ozone gas-dissolved water generating device and a sludge conditioning system, the ozone gas-dissolved water generating device comprises a first pump, a storage tank and a first gas-water mixer, the first pump is communicated with an inlet of the storage tank, and an outlet of the storage tank is communicated with an external pipeline; a water inlet and a water outlet of the first gas-water mixer are respectively communicated with the storage tank, a second pump is arranged on a communicating pipeline between the water inlet and the storage tank or a communicating pipeline between the water outlet and the storage tank, and a gas inlet of the first gas-water mixer is communicated with an ozone generator. The sludge deep dehydration device solves the problem that deep dehydration treatment is difficult due to low oxygen content or high organic matter content or low temperature of sludge, and is low in treatment cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to environmental protection equipment technical field, especially a kind of ozone dissolved gas water generating device and sludge conditioning system. BACKGROUND

[0002] Sludge is the product after sewage treatment, is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloid etc. The main characteristics of sludge are high water content (up to 99% or more), high organic content, easy to rot and stink, and fine particles, small specific gravity, and colloidal liquid. Sludge contains a large amount of organic matter, such as benzene, chlorophenol, polychlorinated biphenyl (PCB), polychlorinated dibenzofuran (PCDFs) and polychlorinated dibenzodioxin (PCDDs) etc.; parasitic eggs and other pathogenic microorganisms; heavy metals such as cadmium, chromium, copper, nickel, mercury, lead and zinc, which can easily cause secondary pollution to the environment if not properly treated.

[0003] Generally, 5-8 tons of sludge with 80% water content can be produced from 10,000 tons of domestic sewage treated by sewage treatment plant, and 10-30 tons of sludge can be produced from 10,000 tons of industrial sewage. The amount of municipal sludge accounts for more than 50% of the total sludge, and the municipal sludge and part of the industrial sludge have high calorific value. According to research data, the calorific value of dry municipal sludge and papermaking and printing and dyeing sludge reaches 2300-3000 kcal / kg. If the dried high-calorific-value sludge is used as a heat source to dry other low-calorific-value sludge, and then the dried low-calorific-value sludge is used as a building material, all sludge can be resourceized. Using sludge as fuel, especially papermaking sludge and municipal sludge, contains a large amount of organic matter, which can be directly used as fuel after drying. However, high-calorific-value sludge is often accompanied by high organic matter content, and it is difficult to deeply dewater high-organic-matter sludge. Therefore, it is often necessary to condition or heat treat the sludge, for example, by adding chemical agents or ozone to improve the dewatering performance of the sludge.

[0004] The Chinese patent specification CN110606649A discloses a method and device for sludge conditioning and dewatering, which is carried out in a conditioning and dewatering integrated device. The conditioning process generates hydroxyl radical to oxidize and break sludge, decomposes extracellular polymeric substances (EPS) of the sludge and degrades organic matters, releases part of bound water, flocculants play the role of electric neutralization and adsorption bridging, increases the size of sludge flocs, improves the dewatering property of the sludge, and then further removes free water and part of bound water under the electroosmosis of horizontal alternating electric field. The implementation steps of the method are as follows: (1) placing the sludge to the cathode area of the horizontal electric field and connecting the direct current power supply; (2) adding hydrogen peroxide to the sludge; (3) introducing ozone into the continuously stirred sludge for reaction; (4) adding flocculants to the sludge for reaction; and (5) performing electroosmotic dewatering after gravity sedimentation of the sludge for a certain time. The method directly introduces ozone into the sludge for conditioning, but the solubility of ozone in the sludge is very limited, and the ozone conditioning effect still has room for improvement. Utility model content

[0005] The main purpose of the utility model is to solve the above-mentioned technical problems to some extent, and provide an ozone dissolved gas water generating device and sludge conditioning system, which solve the problem of difficult deep dewatering treatment of sludge caused by low oxygen content or high organic matter content or low temperature, and have low treatment cost.

[0006] In one aspect, the application provides an ozone dissolved gas water generating device, comprising a first pump, a storage tank and a first gas-water mixer, the first pump is in communication with the inlet of the storage tank, and the outlet of the storage tank is in communication with an external pipeline; the water inlet and the water outlet of the first gas-water mixer are respectively in communication with the storage tank, and a second pump is arranged on the communication pipeline between the water inlet and the storage tank or on the communication pipeline between the water outlet and the storage tank, and the gas inlet of the first gas-water mixer is in communication with an ozone generator.

[0007] In some embodiments, the gas inlet of the ozone generator is in communication with an oxygen generator.

[0008] In some embodiments, a gas disperser is arranged in the storage tank.

[0009] In some embodiments, the inlet of the storage tank is arranged at the bottom, and the outlet of the storage tank is arranged at the top.

[0010] In some embodiments, a second gas-water mixer is further included, the water inlet of the second gas-water mixer is in communication with the first pump, the water outlet of the second gas-water mixer is in communication with the inlet of the storage tank, the gas inlet of the second gas-water mixer is in parallel with the gas inlet of the first gas-water mixer and in communication with the ozone generator.

[0011] The sludge conditioning system comprises the ozone dissolved air water generating device, a sludge pool, a conditioning agent tank, a third pump, a fourth pump, a mixing unit and a pre-pressing tank.

[0012] In some embodiments, a first one-way valve is arranged on the pipeline in parallel with the third pump, a second one-way valve is arranged on the pipeline in parallel with the fourth pump, a third one-way valve is arranged on the pipeline in parallel with the outlet of the storage tank, and a fourth one-way valve is arranged on the pipeline in parallel with the third pump and the fourth pump and in communication with the outlet pipeline of the storage tank.

[0013] In some embodiments, the mixing unit comprises at least two groups, and the pipelines of each group of the mixing unit are connected in series.

[0014] In some embodiments, the mixing unit comprises at least two groups of mixing devices connected in parallel, and each group of the mixing devices comprises at least two mixers connected in series.

[0015] Compared with the prior art, the above technical solution provided by the embodiments of the present application has the following advantages:

[0016] The ozone dissolved air water generating device can produce ozone dissolved air water with higher ozone concentration, which is used for sludge conditioning, especially for sludge containing organic matters such as pesticides, and can oxidize the sludge with high-concentration ozone, improve the activity and dewatering performance of the sludge, and help achieve the purpose of deep dewatering.

[0017] The sludge conditioning system can solve the problem of difficult deep dewatering treatment of sludge caused by low oxygen content, high organic matter content or low temperature, and has low treatment cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural diagram of the ozone dissolved air water generating device and the sludge conditioning system according to Embodiment 1 of the present application;

[0019] Figure 2 is a structural diagram of the ozone dissolved air water generating device and the sludge conditioning system according to Embodiment 2 of the present application.

[0020] REFERENCE NUMERALS

[0021] 100 - ozone dissolved water generating device; 1 - first pump; 2 - storage tank; 3 - first gas-water mixer; 4 - second pump; 5 - ozone generator; 6 - oxygen generator; 7 - sludge pool; 8 - conditioner tank; 9 - third pump; 10 - fourth pump; 11 - pre-pressing tank; 12 - first one-way valve; 13 - second one-way valve; 14 - third one-way valve; 15 - fourth one-way valve; 16 - mixing device; 17 - second gas-water mixer; 18 - disperser. DETAILED DESCRIPTION

[0022] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described in detail with reference to the drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like are based on the directions or positional relationships shown in the drawings, constructed and operated in a particular direction, and are only for the convenience of describing the technical solutions, and are not intended to indicate that the devices or elements referred to must have a particular direction, therefore, it cannot be understood as a limitation on the present application.

[0023] It should also be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing", "setting" and the like should be interpreted broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "below" another element, the element can be "directly" or "indirectly" above the other element, or there can be one or more intervening elements. The terms "first", "second", "third" and the like are only for the convenience of describing the technical solutions, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of technical features indicated. Therefore, the features with "first", "second", "third" and the like can be explicitly or implicitly included one or more of the features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] In the following description, specific details are presented to facilitate a thorough understanding of the present application, but the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits and methods are omitted to avoid unnecessary details that hinder the description of the present application.

[0025] Embodiment 1

[0026] As Figure 1 shown, the ozone dissolved gas water generating device provided by the utility model comprises a first pump 1, a storage tank 2 and a first gas-water mixer 3. The storage tank 2 is provided with an inlet and an outlet. The inlet of the storage tank 2 is arranged at the bottom, and the outlet of the storage tank 2 is arranged at the top. The first pump 1 is in communication with the inlet of the storage tank 2, and the outlet of the storage tank 2 is in communication with an external pipeline. The water inlet and the water outlet of the first gas-water mixer 3 are respectively in communication with the storage tank 2. A second pump 4 is arranged on the communication pipeline between the water inlet and the storage tank 2 or on the communication pipeline between the water outlet and the storage tank 2. The second pump 4 is a booster pump. The gas inlet of the first gas-water mixer 3 is in communication with an ozone generator 5 arranged thereon. The gas inlet of the ozone generator 5 is in communication with an oxygen generator 6 arranged thereon. The oxygen generator 6 is used to prepare the oxygen required by the ozone generator 5. Through the cooperation of the first gas-water mixer 3 and the first pump 1, a closed loop is formed, so that the ozone from the ozone generator 5 can be well dispersed and dissolved in water to form high-concentration ozone dissolved gas water. At the same time, a high pressure can be maintained in the storage tank 2, which helps to maintain a high solubility of ozone in the water in the storage tank 2.

[0027] It is worth noting that the water inlet and the water outlet of the first gas-water mixer 3 of the ozone dissolved gas water generating device 100 are respectively in communication with different positions of the storage tank 2. Specifically, the communication position of the water inlet with the storage tank 2 is lower than that of the water outlet with the storage tank 2.

[0028] The ozone dissolved gas water production device of the embodiment can produce ozone dissolved gas water with a higher ozone concentration, which is used for sludge conditioning, especially for the treatment of sludge containing organic matters such as pesticides. The sludge can be subjected to high-concentration ozone oxidation to improve the activity and dewatering performance of the sludge, which helps to achieve the purpose of deep dewatering.

[0029] A sludge conditioning system is provided, which comprises the above-mentioned ozone dissolved gas water generating device 100, a sludge tank 7, a conditioning agent tank 8, a third pump 9, a fourth pump 10, a mixing unit and a pre-pressing tank 11. Specifically, the sludge tank 7 is in communication with the third pump 9, the conditioning agent tank 8 is in communication with the fourth pump 10, the outlet pipelines of the third pump 9, the fourth pump 10 and the storage tank 2 are connected in parallel, the parallel pipelines are in communication with the mixing unit, and the mixing unit is in communication with the pre-pressing tank 11.

[0030] The sludge conditioning system of the embodiment under the action of the third pump 9 draws the concentrated sludge from the sludge pool 7, then adds the conditioning agent in the conditioning agent tank 8 into the sludge through the fourth pump 10, the fourth pump 10 is a metering pump to meter the conditioning agent, the ozone dissolved air water produced by the ozone dissolved air water producing device 100 is stored in the storage tank 2, then the ozone dissolved air water in the storage tank 2 is added into the sludge mixed with the conditioning agent, the ozone dissolved air water mixed with the sludge mixed with the conditioning agent helps the ozone to fully exert its effect, and finally, the ozone dissolved air water and the sludge mixed with the conditioning agent are sent into the mixing unit together, after fully mixing in the mixing unit, the ozone dissolved air water and the sludge mixed with the conditioning agent are self-flowed to the pre-pressing tank 11, and the sludge conditioning work is completed. The sludge conditioning system can solve the problem of difficult deep dewatering treatment of sludge due to low oxygen content or high organic matter content or low temperature, and the treatment cost is low.

[0031] Further, the first one-way valve 12 is arranged in communication with the third pump 9, the second one-way valve 13 is arranged in communication with the fourth pump 10, and the third one-way valve 14 is arranged in communication with the outlet of the storage tank 2 on the parallel pipeline of the third pump 9, the fourth pump 10 and the outlet pipeline of the storage tank 2, and the fourth one-way valve 15 is arranged in communication with the pipeline of the third pump 9 and the fourth pump 10 and the outlet pipeline of the storage tank 2, which prevents backflow during injection.

[0032] The mixing unit is provided with at least two groups, the pipelines of each group of the mixing unit are connected in series, and the mixing unit includes at least two groups of parallel mixing devices 16, each group of the mixing devices 16 includes at least two series-connected mixers, which makes the sludge mixed with the conditioning agent and the ozone dissolved air water enter the mixing unit, the sludge is divided into at least two streams in the mixing unit, the flow direction and mixing effect of each stream of the sludge are the same, and the separated streams of the sludge are subsequently collected together for full mixing, thereby improving the mixing effect.

[0033] For example, the mixing unit in the embodiment is provided with two groups, the pipelines of each group of the mixing unit are connected in series, and the mixing unit includes two groups of parallel mixing devices 16, each group of the mixing devices 16 includes two series-connected mixers.

[0034] The working process of the sludge conditioning system is as follows:

[0035] The ozone dissolved water produced by the ozone dissolved water generating device 100 is used for sludge conditioning, specifically, the first pump 1 injects clean water into the storage tank 2, the oxygen generator 6 provides the required oxygen for the ozone generator 5, and then the ozone generator 5 injects the generated ozone into the first gas-water mixer 3, and finally the ozone dissolved water generated by the first gas-water mixer 3 is injected into the storage tank 2. The ozone in the ozone generator 5 is mixed with water in the first gas-water mixer 3 to form ozone dissolved water, and the ozone dosage is 0.005 vol% of the sludge amount. In the storage tank 2, the amount of clean water is 1000 times the volume of ozone, and the ozone concentration in the ozone dissolved water in the storage tank 2 is improved through the closed loop formed by the second pump 4 and the first gas-water mixer 3. The higher the ozone concentration in the ozone dissolved water, the better the sludge oxidation effect.

[0036] The third pump 9 then draws out the concentrated sludge with a concentration of 5wt% from the sludge pool 7, and then the fourth pump 10 first adds the appropriate amount of conditioning agent in the conditioning agent tank 8 to the sludge for mixing and coagulation. The amount of conditioning agent is not the point of the present application, so it will not be described in detail. The conditioning agent used includes but is not limited to polymeric ferric sulfate solution. Then the ozone dissolved water in the storage tank 2 is added to the sludge mixed with the conditioning agent,

[0037] Finally, the sludge mixed with the conditioning agent and ozone dissolved water in sequence enters two groups of mixing devices 16 in series. In the mixing device 16, the sludge is divided into two streams, and the flow direction and mixing effect of the two streams are the same. The two streams of sludge separated by the mixer then collide together in opposite directions, and then are again divided into two streams and collide and mix again. After multiple separation and collision, the sludge finally comes out of the second mixing unit and flows to the pre-pressing filter tank 11, completing the sludge conditioning work. The sludge obtained by this method is extremely easy to dewater.

[0038] Example 2

[0039] As shown in Figure 2 , the difference from example 1 is that it also includes a second gas-water mixer 17. The water inlet of the second gas-water mixer 17 is connected to the first pump 1, the water outlet of the second gas-water mixer 17 is connected to the inlet of the storage tank 2, and the gas inlet of the second gas-water mixer 17 is connected in parallel with the gas inlet of the first gas-water mixer 3 and is connected to the ozone generator 5. In this way, part of the ozone enters the second gas-water mixer 17 and is preliminarily mixed with water, and the other part of the ozone enters the first gas-water mixer 3 and is mixed with the water preliminarily mixed with ozone, which helps to further mix the ozone and water more fully and further improves the ozone concentration in the water and the utilization rate of ozone. At the same time, the storage tank 2 is provided with a gas disperser 18, which is a microporous stainless steel mesh, and is arranged between the inlet and outlet of the storage tank 2, which helps to further improve the degree of mixing of ozone and water and improve the dissolution amount of ozone in water.

[0040] The above merely describes preferred embodiments of the present application, and it should be noted that, for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and replacements can be made, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. An ozone water generating device, characterized by comprising: The ozone water generating device comprises a first pump, a storage tank and a first gas-water mixer, the first pump is communicated with an inlet of the storage tank, an outlet of the storage tank is communicated with an external pipeline, the first gas-water mixer is provided with a water inlet and a water outlet communicated with the storage tank, a second pump is arranged on a pipeline communicated with the storage tank at the water inlet or the water outlet of the first gas-water mixer, and an air inlet of the first gas-water mixer is communicated with an ozone generator.

2. The ozone water generating device according to claim 1, wherein An air inlet of the ozone generator is communicated with an oxygen generator.

3. The ozone water generating device according to claim 1, wherein A gas disperser is arranged in the storage tank.

4. The ozone water generating device according to claim 3, wherein The inlet of the storage tank is arranged at the bottom, and the outlet of the storage tank is arranged at the top.

5. The ozone water generating apparatus according to any one of claims 1 to 4, wherein The ozone water generating device further comprises a second gas-water mixer, a water inlet of the second gas-water mixer is communicated with the first pump, a water outlet of the second gas-water mixer is communicated with the inlet of the storage tank, an air inlet of the second gas-water mixer is parallel connected with the air inlet of the first gas-water mixer and communicated with the ozone generator.

6. A sludge conditioning system characterized by, The ozone water generating device comprises a first pump, a storage tank and a first gas-water mixer, the first pump is communicated with an inlet of the storage tank, an outlet of the storage tank is communicated with an external pipeline, the first gas-water mixer is provided with a water inlet and a water outlet communicated with the storage tank, a second pump is arranged on a pipeline communicated with the storage tank at the water inlet or the water outlet of the first gas-water mixer, and an air inlet of the first gas-water mixer is communicated with an ozone generator.

7. The sludge conditioning system of claim 6, wherein, The ozone generator is communicated with an oxygen generator.

8. The sludge conditioning system of claim 6, wherein, A gas disperser is arranged in the storage tank.

9. The sludge conditioning system of claim 8, wherein, The inlet of the storage tank is arranged at the bottom, and the outlet of the storage tank is arranged at the top. The ozone water generating device further comprises a second gas-water mixer, a water inlet of the second gas-water mixer is communicated with the first pump, a water outlet of the second gas-water mixer is communicated with the inlet of the storage tank, an air inlet of the second gas-water mixer is parallel connected with the air inlet of the first gas-water mixer and communicated with the ozone generator. The ozone water generating device comprises a first pump, a storage tank and a first gas-water mixer, the first pump is communicated with an inlet of the storage tank, an outlet of the storage tank is communicated with an external pipeline, the first gas-water mixer is provided with a water inlet and a water outlet communicated with the storage tank, a second pump is arranged on a pipeline communicated with the storage tank at the water inlet or the water outlet of the first gas-water mixer, and an air inlet of the first gas-water mixer is communicated with an ozone generator. The ozone generator is communicated with an oxygen generator. A gas disperser is arranged in the storage tank. The inlet of the storage tank is arranged at the bottom, and the outlet of the storage tank is arranged at the top. The ozone water generating device further comprises a second gas-water mixer, a water inlet of the second gas-water mixer is communicated with the first pump, a water outlet of the second gas-water mixer is communicated with the inlet of the storage tank, an air inlet of the second gas-water mixer is parallel connected with the air inlet of the first gas-water mixer and communicated with the ozone generator. The ozone water generating device comprises a first pump, a storage tank and a first gas-water mixer, the first pump is communicated with an inlet of the storage tank, an outlet of the storage tank is communicated with an external pipeline, the first gas-water mixer is provided with a water inlet and a water outlet communicated with the storage tank, a second pump is arranged on a pipeline communicated with the storage tank at the water inlet or the water outlet of the first gas-water mixer, and an air inlet of the first gas-water mixer is communicated with an ozone generator. The ozone generator is communicated with an oxygen generator. A gas disperser is arranged in the storage tank. The inlet of the storage tank is arranged at the bottom, and the outlet of the storage tank is arranged at the top. The ozone water generating device further comprises a second gas-water mixer, a water inlet of the second gas-water mixer is communicated with the first pump, a water outlet of the second gas-water mixer is communicated with the inlet of the storage tank, an air inlet of the second gas-water mixer is parallel connected with the air inlet of the first gas-water mixer and communicated with the ozone generator. The ozone water generating device comprises a first pump, a storage tank and a first gas-water mixer, the first pump is communicated with an inlet of the storage tank, an outlet of the storage tank is communicated with an external pipeline, the first gas-water mixer is provided with a water inlet and a water outlet communicated with the storage tank, a second pump is arranged on a pipeline communicated with the storage tank at the water inlet or the water outlet of the first gas-water mixer, and an air inlet of the first gas-water mixer is communicated with an ozone generator.

Images