Membrane concentrated liquid treatment device and waste incineration power plant membrane concentrated liquid treatment system

Abstract

The utility model discloses a membrane concentrated liquor treatment spray head and a waste incineration power plant membrane concentrated liquor treatment system, which comprise a delivery pipe, a spray head and a gas delivery pipe, the spray head is arranged at one end of the delivery pipe, the spray head comprises a column body, and a blind hole is arranged in the middle of one end of the column body connected with the delivery pipe. A plurality of through holes are formed in the positions, around the blind holes, of the column body, the blind holes are communicated with the through holes through communicating holes, one end of the air conveying pipe is located outside the conveying pipe, and the other end of the air conveying pipe extends into the conveying pipe and is communicated with the blind holes in the spray head. The conveying pipe is used for conveying membrane concentrated liquid, the membrane concentrated liquid pumped by the water pump is sprayed out from the spray head, compressed air is input from the air conveying pipe, the compressed air is mixed with the membrane concentrated liquid in the spray head and further pressurizes the membrane concentrated liquid, the spraying speed of the membrane concentrated liquid is increased, and therefore the membrane concentrated liquid has a better atomization effect; the nozzle is not easy to block.

Description

Technical Field

[0001] This utility model relates to the field of leachate treatment technology for waste incineration power generation, and in particular to a membrane concentrate treatment device and a membrane concentrate treatment system for waste incineration power plants. Background Technology

[0002] Municipal solid waste incineration for power generation is an important method for treating urban waste. However, this process generates a certain amount of leachate, which contains large amounts of organic matter, heavy metals, ammonia nitrogen, and other pollutants. To meet emission standards, leachate treatment typically employs a "biological + membrane" process, such as NF or RO membranes. These membranes have advantages such as small footprint and good permeability. However, while achieving the required leachate concentration, this process generates a large amount of leachate membrane concentrate, or membrane concentrate, which accounts for approximately 15%-25% of the raw leachate. This concentrate mainly contains high concentrations of nitrates, recalcitrant organic pollutants, and humic acid, exhibiting very low biodegradability. It is a highly concentrated wastewater that is extremely difficult to treat, and direct discharge would cause serious environmental pollution.

[0003] Currently, membrane concentrate is mostly treated by back-incineration. Among them, Chinese patent document CN212930021U, published on April 9, 2021, discloses a single-fluid spray gun for back-incineration of leachate or concentrate in a waste incinerator. It includes a spray gun body, a nozzle, and a mounting flange. The spray gun body includes a liquid inlet pipe and an air inlet pipe. The liquid inlet pipe is fitted inside the air inlet pipe. The nozzle is connected to the outlet of the liquid inlet pipe. The liquid inlet pipe has a liquid inlet at its inlet. The end of the air inlet pipe near the liquid inlet is closed and the end near the nozzle is open. The circumferential surface of the air inlet pipe has an air inlet. The mounting flange is fitted outside the air inlet pipe to fix the spray gun body to the waste incinerator. Its advantages are: the spray gun directly uses the liquid pressure inside the inlet pipe to spray the leachate or concentrate from the nozzle in the form of mist, covering a large area and spraying a long distance; its disadvantages are: since the inlet pipe is located inside the air inlet pipe, the compressed air is outside the liquid flow during use, and the membrane concentrate has a certain concentration, resulting in poor dispersion of the liquid flow by the compressed air and unsatisfactory atomization effect. In addition, the nozzle sprays liquid through a flat groove, and in order to obtain atomization effect, the gap of the flat groove is small, so there is also the problem of easy clogging. Utility Model Content

[0004] The purpose of this invention is to provide a membrane concentrate treatment device and a membrane concentrate treatment system for waste incineration power plants to solve the problems of unsatisfactory atomization effect and easy clogging.

[0005] To achieve the above objectives, this utility model provides a membrane concentrate treatment device, including a delivery pipe, a nozzle, and a gas delivery pipe. The nozzle is installed at one end of the delivery pipe and includes a column. A blind hole is provided in the middle of the end of the column that is connected to the delivery pipe. Multiple through holes are provided on the column around the blind hole. The blind hole and the through holes are connected by connecting holes. One end of the gas delivery pipe is located outside the delivery pipe, and the other end extends into the delivery pipe and communicates with the blind hole on the nozzle.

[0006] The nozzle is installed at one end of the delivery pipe, and the other end of the delivery pipe is provided with a liquid inlet.

[0007] The connecting hole is inclined, with one end of the connecting hole away from the conveying pipe and the other end of the connecting hole close to the conveying pipe.

[0008] A gas-containing cavity is provided in the middle of the through hole, and a nozzle is installed at the end of the through hole away from the delivery pipe. The nozzle has multiple oblique holes located at the gas-containing cavity.

[0009] The nozzle includes a connecting section and an external threaded section, which are fixedly connected. A through-hole is provided in the middle of the connecting section and the external threaded section. The oblique hole is provided in the connecting section. The nozzle is screwed into the through hole through the external threaded section.

[0010] The external thread section has a screwing structure at the end away from the connecting section.

[0011] A connecting flange is fixedly installed on the delivery pipe.

[0012] A pressure gauge is installed on one end of the gas pipeline, located outside the pipeline.

[0013] A membrane concentrate treatment system for a waste incineration power plant includes a membrane concentrate treatment device installed in the furnace or flue gas outlet of the waste incinerator.

[0014] Temperature sensors are installed in the furnace or flue gas outlet of the waste incinerator.

[0015] Compared with the prior art, this utility model has the following technical effects:

[0016] 1. The conveying pipe of this utility model is used to convey membrane concentrate. The membrane concentrate pumped by the water pump is sprayed out from the nozzle. Compressed air is introduced from the air supply pipe. The compressed air mixes with the membrane concentrate in the nozzle and further pressurizes the membrane concentrate, thereby increasing the spraying speed of the membrane concentrate, so that the membrane concentrate has a better atomization effect. In addition, because the through hole has a large diameter, the nozzle is not easy to be blocked.

[0017] 2. The through hole of this utility model is provided with an air-containing chamber in the middle. A nozzle is installed at the end of the through hole away from the delivery pipe. Compressed air in the delivery pipe enters the blind hole, then enters the air-containing chamber through the connecting hole, and then enters the nozzle through multiple oblique holes, so that the compressed air and the membrane concentrate are mixed more fully and the atomization effect is improved. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0019] Figure 1 This is a diagram showing the usage state of this utility model.

[0020] Figure 2 This is a schematic diagram of the main structure of the membrane concentrate treatment device of this utility model.

[0021] Figure 3 This is a cross-sectional structural schematic diagram of the membrane concentrate treatment device of this utility model.

[0022] Figure 4 for Figure 2 A schematic diagram of the right-side structure.

[0023] Figure 5 for Figure 3 Enlarged structural diagram at point A in the middle.

[0024] Figure 6 This is a three-dimensional structural diagram of the nozzle of this utility model.

[0025] Figure label:

[0026] Waste incinerator 10, furnace 11, flue gas outlet 12;

[0027] Membrane concentrate treatment device 20, delivery pipe 21, nozzle 22, column 221, blind hole 222, through hole 223, gas chamber 224, connecting hole 225, liquid inlet 23, gas delivery pipe 24, pressure gauge 25, connecting flange 26, nozzle 27, connecting section 271, external thread section 272, spray hole 273, screwing structure 274, oblique hole 275;

[0028] Temperature sensor 30. Detailed Implementation

[0029] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0030] Example 1:

[0031] Please see Figure 2-6 A membrane concentrate treatment device 20 includes a delivery pipe 21, a nozzle 22, and a gas delivery pipe 24. The nozzle 22 is installed at one end of the delivery pipe 21. The nozzle 22 includes a column 221. A blind hole 222 is provided in the middle of the end of the column 221 connected to the delivery pipe 21. Six to eight through holes 223 are provided on the column 221 around the blind hole 222. The blind hole 222 and the through holes 223 are connected by connecting holes 225. One end of the gas delivery pipe 24 is located outside the delivery pipe 21, and the other end extends into the delivery pipe 21 and is connected to the blind hole 222 on the nozzle 22.

[0032] Delivery pipe 21 is used to deliver membrane concentrate. The membrane concentrate, pumped by a water pump, is sprayed out from nozzle 22. See [link / reference needed]. Figure 3 , 5 Compressed air is input from the air supply pipe 24. The compressed air mixes with the membrane concentrate in the nozzle 22 and further pressurizes the membrane concentrate, increasing the spray speed of the membrane concentrate, thereby giving the membrane concentrate a better atomization effect. Furthermore, since the through hole 223 has a large diameter, the nozzle 22 is not easily clogged.

[0033] In this embodiment, the nozzle 22 is installed at one end of the delivery pipe 21, and the other end of the delivery pipe 21 is provided with a liquid inlet 23. The liquid inlet 23 facilitates the connection between the delivery pipe 21 and the pipeline for pumping the membrane concentrate.

[0034] Further, see Figure 5 The connecting hole 225 is inclined, with one end of the connecting hole 223 away from the delivery pipe 21 and the other end of the connecting hole 222 close to the delivery pipe 21. The inclined connecting hole 225 allows compressed air to be ejected towards the front end, thereby better driving the atomization and ejection of the membrane concentrate.

[0035] See Figure 2 , 3 4. A connecting flange 26 is fixedly welded onto the conveying pipe 21 to facilitate the installation of the membrane concentrate treatment device 20 onto the waste incinerator 10.

[0036] See Figure 2 , 3 On the air supply pipe 24, a pressure gauge 25 is installed at one end located outside the supply pipe 21, and the pressure of compressed air is measured by the pressure gauge 25.

[0037] Example 2:

[0038] Based on Example 1, see Figure 3 , 56. A gas-containing cavity 224 is provided in the middle of the through hole 223. A nozzle 27 is installed at the end of the through hole 223 away from the delivery pipe 21. The nozzle 27 has multiple oblique holes 275 located in the gas-containing cavity 224. Compressed air in the gas delivery pipe 24 enters the blind hole 222, then enters the gas-containing cavity 224 through the connecting hole 225, and then enters the nozzle 27 through the multiple oblique holes 275, thereby making the compressed air and the membrane concentrate mix more thoroughly and improving the atomization effect.

[0039] In this embodiment, four to six oblique holes 275 are evenly distributed around the nozzle 27.

[0040] Further, see Figure 5 , 6 The nozzle 27 includes a connecting section 271 and an externally threaded section 272, which are fixedly connected. A through-hole 273 is provided in the middle of both the connecting section 271 and the externally threaded section 272, and an oblique hole 275 is provided in the connecting section 271. The nozzle 27 is screwed into the through hole 223 via the externally threaded section 272. This structure facilitates the disassembly and replacement of the nozzle 27.

[0041] Furthermore, the external thread section 272 is provided with a screwing structure 274 at the end away from the connecting section 271, which facilitates screwing the nozzle 27.

[0042] In this embodiment, the tightening structure 274 is at least two planes located at the end of the external thread section 272. Of course, the tightening structure 274 can also be located in two blind holes at the end of the external thread section 272.

[0043] Example 3:

[0044] Based on Example 1 or Example 2, see Figure 1 A membrane concentrate treatment system for a waste incineration power plant, wherein the membrane concentrate treatment device 20 is installed at the furnace 11 or flue gas outlet 12 of the waste incinerator 10.

[0045] During installation, holes are made in the side wall of the furnace 11 or flue gas outlet 12 of the waste incinerator 10. The nozzle 22 and the conveying pipe 21 of the membrane concentrate treatment device 20 are partially inserted into the holes. The conveying pipe 21 is welded to the side wall of the waste incinerator 10 or connected by bolts through the connecting flange 26.

[0046] The delivery pipe 21 is connected to the pipeline for pumping membrane concentrate, and pressurized membrane concentrate is pumped into the delivery pipe 21. The gas delivery pipe 24 is connected to the compressed air source pipeline, and compressed air is introduced into the gas delivery pipe 24.

[0047] Furthermore, a temperature sensor 30 is installed at the furnace 11 or flue gas outlet 12 of the waste incinerator 10. This facilitates the measurement of the temperature inside the furnace 11 or flue gas outlet 12, and allows for the injection of membrane concentrate into the waste incinerator 10 within a suitable temperature range.

[0048] In this embodiment, the temperature sensor 30 is a PT100 temperature sensor. When in use, the temperature sensor 30 is connected to the matching controller, and the controller displays the temperature value in real time.

[0049] The method of use or principle of this utility model:

[0050] See Figure 3 The delivery pipe 21 is connected to the pipeline for pumping membrane concentrate. The membrane concentrate pumped by the water pump is sprayed out from the nozzle 22. Compressed air is input from the air supply pipe 24. The compressed air mixes with the membrane concentrate in the nozzle 22 and further pressurizes the membrane concentrate, thereby increasing the spraying speed of the membrane concentrate, thus giving the membrane concentrate a better atomization effect. In addition, because the through hole 223 has a large diameter, the nozzle 22 is not easy to be blocked.

[0051] Temperature sensor 30 displays the temperature value in real time through controller. When the temperature inside waste incinerator 10 is greater than 850°C, membrane concentrate is injected into waste incinerator 10 through membrane concentrate treatment device 20.

Claims

1. A membrane concentrate treatment device (20) comprising a delivery pipe (21), a spray head (22) and a gas supply pipe (24), the spray head (22) being mounted at one end of the delivery pipe (21), characterised in that: The spray head (22) comprises a column (221), a blind hole (222) is arranged in the middle of one end of the column (221) connected with the conveying pipe (21), a plurality of through holes (223) are arranged on the column (221) around the blind hole (222), the blind hole (222) and the through hole (223) are communicated by a communication hole (225) respectively, one end of the gas conveying pipe (24) is located outside the conveying pipe (21), the other end extends into the conveying pipe (21) and is communicated with the blind hole (222) of the spray head (22).

2. The membrane concentrate treatment device (20) according to claim 1, characterized in that: The spray head (22) is installed at one end of the conveying pipe (21), and the other end of the conveying pipe (21) is provided with a liquid inlet (23).

3. The membrane concentrate treatment device (20) of claim 1, characterized by: The communication hole (225) is inclined, one end of the communication hole (225) away from the conveying pipe (21) is located at one end of the through hole (223), and the other end close to the conveying pipe (21) is located at one end of the blind hole (222).

4. The membrane concentrate treatment device (20) of claim 1, characterized by: A gas containing cavity (224) is arranged in the middle of the through hole (223), a nozzle (27) is installed in the through hole (223) away from the conveying pipe (21), and a plurality of inclined holes (275) are arranged on the nozzle (27) at the gas containing cavity (224).

5. The membrane concentrate treatment device (20) according to claim 4, characterized in that: The nozzle (27) comprises a connecting section (271) and an external thread section (272), the connecting section (271) and the external thread section (272) are fixedly connected, a through spray hole (273) is arranged in the middle of the connecting section (271) and the external thread section (272), the inclined hole (275) is arranged on the connecting section (271), and the nozzle (27) is screwed and connected with the through hole (223) through the external thread section (272).

6. The membrane concentrate treatment device (20) according to claim 5, characterized in that: The external thread section (272) is provided with a rotating structure (274) at one end away from the connecting section (271).

7. The membrane concentrate treatment device (20) of claim 1, characterized by: The conveying pipe (21) is fixedly installed with a connecting flange (26).

8. The membrane concentrate treatment device (20) of claim 1, characterized by: The gas conveying pipe (24) is installed with a pressure gauge (25) at one end outside the conveying pipe (21).

9. A membrane concentrate treatment system for a waste incineration power plant, characterized by: The membrane concentrated liquid treatment device (20) of any one of claims 1 to 8 is installed at the hearth (11) or the flue gas outlet (12) of the waste incinerator (10).

10. The waste incineration power plant membrane concentrate treatment system of claim 9, wherein: A temperature sensor (30) is installed at the hearth (11) or the flue gas outlet (12) of the waste incinerator (10).

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