A dredging device for sludge waste heat recovery

Abstract

The utility model relates to a kind of for sludge waste heat recovery's dredging device, belong to sludge waste heat recovery technical field.The for sludge waste heat recovery's dredging device, including: scale removal mechanism, the outside of the replacement pipe is located in the inside of waste heat recovery pipe is provided with the scraper for the dust impurities that the inside wall of waste heat recovery pipe and replacement pipe outer wall precipitate is scraped and cleaned, by being arranged in the inside of waste heat recovery pipe, replacement pipe inside flow has waste heat replacement liquid, the waste gas produced after sludge drying or incineration is introduced into the inside of mounting groove, dust and impurities in waste gas adhere to the outside wall of replacement pipe, pull pull ring, scraper will dust impurities adhered to the outer surface of replacement pipe and the inside wall of waste heat recovery pipe be scraped and cleaned, exclude by discharging hole, to ensure the efficiency of replacement liquid inside replacement pipe to waste heat replacement in waste gas, solve the problem that dust in waste gas is not cleaned in pipeline inner wall.

Description

Technical Field

[0001] This utility model relates to the field of sludge waste heat recovery technology, and in particular to a sludge dredging device for sludge waste heat recovery. Background Technology

[0002] Sludge waste heat recovery refers to the technology of capturing and reusing the heat energy that would otherwise be wasted during the sludge treatment and disposal process.

[0003] Sludge thermal drying or incineration involves using external energy sources (steam, natural gas, etc.) to dry or incinerate sludge, which generates high-temperature waste gas, steam, or hot water during the drying or incineration process.

[0004] When recovering waste heat from the exhaust gas generated during incineration, the exhaust gas contains a large amount of dust. Although existing waste heat recovery equipment will install insulation materials or heat exchange equipment on the outside of the pipeline to recover the heat in the exhaust gas, the dust in the exhaust gas is easy to adhere to the inner wall of the pipeline during long-term use and is difficult to clean. Utility Model Content

[0005] Therefore, it is necessary to recover waste heat from the waste gas generated during the incineration process. Since the waste gas contains a large amount of dust, existing waste heat recovery equipment uses insulation materials or heat exchange equipment on the outside of the pipeline to recover the heat from the waste gas. However, the dust in the waste gas adheres to the inner wall of the pipeline after long-term use and is difficult to clean. Therefore, a sludge cleaning device for sludge waste heat recovery is provided.

[0006] A sludge dredging device for waste heat recovery of sludge includes: a waste heat recovery pipe;

[0007] A descaling mechanism is installed inside the waste heat recovery pipe; the descaling mechanism includes a displacement pipe and a scraper; the waste heat recovery pipe is provided inside the displacement pipe, and displacement fluid circulates inside the displacement pipe; both ends of the displacement pipe pass through both sides of the waste heat recovery pipe and are connected to the liquid storage component; a scraper is provided outside the displacement pipe inside the waste heat recovery pipe for scraping and cleaning dust and impurities deposited on the inner wall of the waste heat recovery pipe and the outer wall of the displacement pipe.

[0008] The two ends of the waste heat recovery pipe are connected to the liquid storage assembly via pipes.

[0009] In one embodiment, the descaling mechanism further includes a pull rod and a pull ring; the scraper is sleeved on the outside of the displacement tube, the side wall of the scraper is connected to the pull rod, and the end of the pull rod passes through one side wall of the waste heat recovery tube and is connected to the pull ring.

[0010] In one embodiment, a sealing gasket is provided between the pull rod and the side wall of the waste heat recovery pipe.

[0011] In one embodiment, the side wall of the waste heat recovery pipe is provided with a slag discharge hole below the pull ring for discharging and cleaning the scraped dust. The slag discharge hole is connected to an external waste gas recovery device through a pipe.

[0012] In one embodiment, a sealing ring is provided in the gap where the replacement pipe meets the side walls of the waste heat recovery pipe.

[0013] In one embodiment, the liquid storage assembly includes a liquid storage tank, and the ends of the displacement pipe that penetrate the side walls of the waste heat recovery pipe are connected to the liquid storage tank through pipes. A circulation pump is provided between the pipes connecting the displacement pipe and the liquid storage tank.

[0014] In one embodiment, the top of the liquid storage tank is provided with a filling port, a thermometer is provided inside the upper part of the liquid storage tank, and a valve is provided on the side wall of the liquid storage tank to control the discharge of the replacement liquid inside the liquid storage tank.

[0015] In one embodiment, the side wall of the waste heat recovery pipe is provided with an installation groove, and a transparent plate is provided inside the installation groove to facilitate workers to observe the dust deposited on the outer wall of the replacement pipe inside the waste heat recovery pipe. The side wall of the waste heat recovery pipe opposite to the slag discharge hole is connected to the exhaust gas outlet of the external sludge incinerator through a connecting pipe.

[0016] Beneficial effects

[0017] 1. The above-mentioned sludge waste heat recovery cleaning device, by setting the replacement pipe inside the waste heat recovery pipe, the waste heat replacement liquid flows inside the replacement pipe, and the waste gas generated after sludge drying or incineration is introduced into the installation tank. The waste heat in the waste gas is replaced by the replacement liquid inside the replacement pipe, while the dust and impurities in the waste gas adhere to the outer wall of the replacement pipe. Pulling the pull ring, the scraper scrapes and cleans the dust and impurities adhering to the outer surface of the replacement pipe and the inner wall of the waste heat recovery pipe, and discharges them through the slag discharge hole, thereby ensuring the efficiency of the replacement liquid inside the replacement pipe in replacing the heat in the waste gas and solving the problem of dust in the waste gas being inconvenient to clean on the inner wall of the pipe.

[0018] 2. A replacement fluid circulates inside the replacement pipe. The ends of the replacement pipe, which penetrates the side walls of the waste heat recovery pipe, are connected to the liquid storage assembly via pipes. A circulation pump circulates the replacement fluid inside the liquid storage tank through the pipes within the replacement pipe. A thermometer inside the liquid storage tank monitors the temperature of the replacement fluid. When the temperature of the replacement fluid in the liquid storage tank is higher than the temperature of the waste gas, the valve is opened to discharge and collect the replacement fluid from the liquid storage tank. New replacement fluid is then added into the liquid storage tank through the filling port to replace the heat of the waste gas introduced into the waste heat recovery pipe. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall connection structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the connection position structure of the waste heat recovery pipe of this utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the waste heat recovery pipe of this utility model;

[0023] Figure 4 This is a cross-sectional schematic diagram of the internal structure of the waste heat recovery pipe of this utility model.

[0024] Figure 5 This is a cross-sectional schematic diagram of the internal structure of the liquid storage tank of this utility model.

[0025] Figure label:

[0026] 100. Waste heat recovery pipe; 101. Connecting pipe; 102. Mounting groove; 103. Transparent plate; 200. Descaling mechanism; 201. Scraper; 202. Pull rod; 203. Pull ring; 204. Slag discharge hole; 205. Replacement pipe; 300. Liquid storage assembly; 301. Liquid storage tank; 302. Liquid filling port; 303. Thermometer; 304. Circulation pump; 305. Valve. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] The following is combined Figures 1-5 This invention describes a sludge dredging device for waste heat recovery from sludge.

[0029] In one embodiment, a sludge cleaning device for sludge waste heat recovery includes: a waste heat recovery pipe 100 and a descaling mechanism 200 disposed inside the waste heat recovery pipe 100; the descaling mechanism 200 includes a displacement pipe 205 and a scraper 201; the displacement pipe 205 is disposed inside the waste heat recovery pipe 100, and a displacement fluid circulates inside the displacement pipe 205; both ends of the displacement pipe 205 penetrate through both sides of the waste heat recovery pipe 100 and are connected to a liquid storage assembly 300; a scraper 201 is disposed outside the displacement pipe 205 inside the waste heat recovery pipe 100 for scraping and cleaning dust and impurities deposited on the inner wall of the waste heat recovery pipe 100 and the outer wall of the displacement pipe 205;

[0030] The two ends of the waste heat recovery pipe 100 are connected to the liquid storage component 300 through pipes;

[0031] like Figure 3 and Figure 4 As shown, the descaling mechanism 200 also includes a pull rod 202 and a pull ring 203. The scraper 201 is sleeved on the outside of the replacement pipe 205. The side wall of the scraper 201 is connected to the pull rod 202. The end of the pull rod 202 passes through one side wall of the waste heat recovery pipe 100 and is connected to the pull ring 203.

[0032] A sealing gasket is provided between the pull rod 202 and the side wall of the waste heat recovery pipe 100. A slag discharge hole 204 is provided through the side wall of the waste heat recovery pipe 100 below the pull ring 203 for discharging and cleaning the scraped dust. The slag discharge hole 204 is connected to the external waste gas recovery equipment through a pipe. A sealing ring is provided at the gap where the replacement pipe 205 meets the side walls of the waste heat recovery pipe 100.

[0033] In this embodiment, a scraper 201 is provided on the outside of the replacement tube 205, and the inner wall of the scraper 201 is in contact with the outer wall of the replacement tube 205 so that when the pull ring 203 is pulled, the pull rod 202 can be driven to scrape off the dust and impurities adhering to the outer wall of the replacement tube 205. At the same time, the outer arc surface of the scraper 201 is in contact with the inner wall of the waste heat recovery tube 100. When the scraper 201 scrapes and cleans the dust and impurities on the outer arc surface of the replacement tube 205, the outer arc surface of the scraper 201 scrapes and cleans the dust and impurities on the inner wall of the waste heat recovery tube 100. This prevents the dust and impurities on the inner wall of the waste heat recovery tube 100 from falling onto the outer arc surface of the replacement tube 205 after the scraper 201 has cleaned the impurities on the outer arc surface of the replacement tube 205, thus affecting the cleaning effect.

[0034] The waste heat recovery pipe 100 has a slag discharge hole 204 connected through it below the pull ring 203. The dust scraped off by the scraper 201 falls into the interior of the waste heat recovery pipe 100 and is driven to the position of the slag discharge hole 204 by the scraper 201. Workers can use a dust collection device to suck up the dust inside the slag discharge hole 204. The outside of the slag discharge hole 204 can also be connected to an external waste gas recovery device through a pipe, and the waste gas recovery device can recover and treat the waste gas after heat recovery.

[0035] Regularly scrape and clean the dust and impurities deposited on the outer arc surface of the replacement tube 205 to prevent the replacement fluid flowing inside the replacement tube 205 from exchanging heat with the waste gas introduced into the waste heat recovery tube 100, thus affecting the heat exchange efficiency.

[0036] Meanwhile, a sealing gasket is provided on the side wall where the pull rod 202 contacts the waste heat recovery pipe 100, and a sealing ring is provided at the joint where the replacement pipe 205 passes through the side walls on both sides of the waste heat recovery pipe 100, so as to prevent waste gas from flowing out from the joint, causing waste gas leakage and polluting the environment around the equipment.

[0037] like Figure 5 As shown, the liquid storage assembly 300 includes a liquid storage tank 301. The end of the displacement pipe 205, which passes through the side walls of the waste heat recovery pipe 100, is connected to the liquid storage tank 301 through a pipe. A circulation pump 304 is provided between the pipe connecting the displacement pipe 205 and the liquid storage tank 301. A liquid filling port 302 is provided on the top of the liquid storage tank 301. A thermometer 303 is provided on the upper part of the inside of the liquid storage tank 301. A valve 305 is provided on the side wall of the liquid storage tank 301 to control the discharge of the displacement liquid inside the liquid storage tank 301.

[0038] In this embodiment, a displacement pipe 205 is provided, which extends through both ends of the waste heat recovery pipe 100 and is connected to the storage tank 301 via pipes. A circulation pump 304 is connected between the pipes connected to one end of the displacement pipe 205. The circulation pump 304 draws the displacement liquid inside the storage tank 301 into the displacement pipe 205. The displacement liquid enters the displacement pipe 205 from one end and flows through the displacement pipe 205 inside the waste heat recovery pipe 100. The displacement liquid circulates and replaces the waste heat in the exhaust gas introduced into the waste heat recovery pipe 100.

[0039] like, Figure 2 and Figure 3 As shown, the side wall of the waste heat recovery pipe 100 is provided with an installation groove 102, and a transparent plate 103 is provided inside the installation groove 102 to facilitate workers to observe the dust deposited on the outer wall of the replacement pipe 205 installed inside the waste heat recovery pipe 100. The side wall opposite to the slag discharge hole 204 of the waste heat recovery pipe 100 is connected to the exhaust gas outlet of the external sludge incinerator through a connecting pipe 101.

[0040] In this embodiment, a thermometer 303 is also installed inside the liquid storage tank 301. The thermometer 303 detects the temperature of the replacement liquid circulating inside the liquid storage tank 301. When the temperature inside the replacement liquid is higher than the temperature of the exhaust gas, the valve 305 is opened by the external controller to discharge and collect the replacement liquid inside the liquid storage tank 301. Then, new replacement liquid with a temperature lower than the temperature of the exhaust gas is injected into the liquid storage tank 301 through the liquid filling port 302, thereby realizing the circulation and replacement of the exhaust gas.

[0041] Working principle: When in use, connect one end of the connecting pipe 101 to the exhaust outlet of the sludge drying or incineration equipment, and connect the other end of the connecting pipe 101 to the waste heat recovery pipe 100. Start the circulation pump 304, and the circulation pump 304 will circulate and extract the replacement liquid inside the storage tank 301. The exhaust gas enters the interior of the waste heat recovery pipe 100 through the connecting pipe 101. The replacement liquid flowing inside the replacement pipe 205 set inside the waste heat recovery pipe 100 replaces the waste heat in the exhaust gas inside the waste heat recovery pipe 100.

[0042] During the replacement process, workers observe the dust deposited and adhered to the outer wall of the replacement tube 205 inside the waste heat recovery tube 100 through the transparent plate 103. Pulling the pull ring 203 causes the pull rod 202 to slide along the inner wall of the waste heat recovery tube 100, and the inner wall of the scraper 201 slides along the outer arc surface of the replacement tube 205 to scrape off the dust and impurities on the outer arc surface of the replacement tube 205. The dust and impurities are driven by the scraper 201 to the inside of the slag discharge hole 204, and the dust inside the slag discharge hole 204 can be sucked up by the external dust collection equipment.

[0043] The slag discharge hole 204 can also be connected to an external waste gas recovery device via a pipeline, so that the waste gas recovery device can treat the waste gas after heat recovery.

[0044] Additional notes:

[0045] The connecting pipe 101 in this application can be connected to the exhaust outlet of existing sludge drying or incineration equipment, wherein the material of the replacement pipe 205 is selected according to the characteristics of the exhaust gas.

[0046] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A sludge dredging device for waste heat recovery from sludge, characterized in that, include: Waste heat recovery pipe (100); A descaling mechanism (200) is installed inside the waste heat recovery pipe (100); the descaling mechanism (200) includes a displacement pipe (205) and a scraper (201); the waste heat recovery pipe (100) is provided with a displacement pipe (205), and a displacement liquid circulates inside the displacement pipe (205); both ends of the displacement pipe (205) pass through both sides of the waste heat recovery pipe (100) and are connected to the liquid storage assembly (300); the outside of the displacement pipe (205) is located inside the waste heat recovery pipe (100) and is provided with a scraper (201) for scraping and cleaning the dust and impurities deposited on the inner wall of the waste heat recovery pipe (100) and the outer wall of the displacement pipe (205); The two ends of the waste heat recovery pipe (100) are connected to the liquid storage assembly (300) via pipes.

2. The sludge dredging device for waste heat recovery of sludge according to claim 1, characterized in that, The descaling mechanism (200) also includes a pull rod (202) and a pull ring (203); the scraper (201) is sleeved on the outside of the replacement pipe (205), the side wall of the scraper (201) is connected to the pull rod (202), and the end of the pull rod (202) passes through one side wall of the waste heat recovery pipe (100) and is connected to the pull ring (203).

3. A sludge dredging device for waste heat recovery from sludge according to claim 2, characterized in that, A sealing gasket is provided between the pull rod (202) and the side wall of the waste heat recovery pipe (100).

4. A sludge dredging device for waste heat recovery of sludge according to claim 3, characterized in that, The side wall of the waste heat recovery pipe (100) is provided with a slag discharge hole (204) below the pull ring (203) for discharging and cleaning the scraped dust. The slag discharge hole (204) is connected to an external waste gas recovery device through a pipe.

5. A sludge dredging device for waste heat recovery of sludge according to claim 4, characterized in that, A sealing ring is provided at the gap where the replacement pipe (205) and the side walls of the waste heat recovery pipe (100) meet.

6. A sludge dredging device for waste heat recovery from sludge according to claim 1, characterized in that, The liquid storage assembly (300) includes a liquid storage tank (301). The end of the displacement pipe (205) that passes through the side walls of the waste heat recovery pipe (100) is connected to the liquid storage tank (301) through a pipe. A circulation pump (304) is provided between the pipe connecting the displacement pipe (205) and the liquid storage tank (301).

7. A sludge dredging device for waste heat recovery from sludge according to claim 6, characterized in that, The top of the liquid storage tank (301) is provided with a liquid filling port (302), a thermometer (303) is provided inside the liquid storage tank (301) at the top, and a valve (305) is provided on the side wall of the liquid storage tank (301) to control the discharge of the replacement liquid inside the liquid storage tank (301).

8. A sludge dredging device for waste heat recovery from sludge according to claim 7, characterized in that, The waste heat recovery pipe (100) has an installation groove (102) on its side wall. The installation groove (102) is equipped with a transparent plate (103) to facilitate workers to observe the dust deposited on the outer wall of the replacement pipe (205) installed inside the waste heat recovery pipe (100). The side wall opposite to the slag discharge hole (204) of the waste heat recovery pipe (100) is connected to the exhaust gas outlet of the external sludge incinerator through a connecting pipe (101).

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