Conveying device for hazardous waste liquid

Abstract

The utility model discloses a conveying device for hazardous waste liquid, and relates to the technical field of hazardous waste treatment and incineration devices. Comprising a liquid storage tank; the outer wall of the conveying pipe is fixedly connected with the inner wall of the liquid storage tank; the outer wall of the feeding pump is fixedly connected with the outer wall of the conveying pipe; and the outer wall of the incineration rotary kiln is fixedly connected with the end, away from the liquid storage tank, of the conveying pipe, and the adjusting device is arranged, so that when the flow of the burner valve bank is low, the pressure of waste liquid in the pump is increased to the pressure of compressed air. And stopping until the pressure is balanced. The pump does not do idle work on the waste liquid, so that the harm of temperature rise of the waste liquid is avoided. Meanwhile, due to the fact that the pneumatic diaphragm pump is adopted instead of an electric diaphragm pump, the danger caused by overpressure of a pump outlet is avoided while the pressure supplied to the combustor is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of conveying devices for hazardous waste liquids, and in particular to a conveying device for hazardous waste liquids. Background Art

[0002] Hazardous liquid waste is one of the primary feedstocks in hazardous waste treatment plants. In waste liquid conveying systems, variable-frequency electric fluorine-lined centrifugal pumps are often used as the conveying power unit, transporting the liquid hazardous waste from storage tanks to rotary kilns for combustion via pipelines. This method can meet the conveying requirements of most waste liquids. However, in practice, some waste liquids have low boiling points and easily vaporize, causing air binding or cavitation in the centrifugal pump. Furthermore, when the burner valve block controls a low flow rate, the liquid velocity at the pump head decreases, preventing heat from being dissipated. This results in a significant temperature rise, and in severe cases, can cause the fluorine lining of the pump head to melt, deform, or even leak. Leakage and spraying of high-temperature, flammable liquids can easily cause fires. Therefore, for waste liquids that are not suitable for centrifugal pumps, an alternative liquid supply method is necessary. Utility Model Content

[0003] In response to the shortcomings of the prior art, the present invention addresses the technical problems by adopting a technical solution: a device for conveying hazardous waste liquids, comprising: a liquid storage tank; a delivery pipe, the outer wall of which is fixedly connected to the inner wall of the liquid storage tank; a feed pump, the outer wall of which is fixedly connected to the outer wall of the delivery pipe; an incineration rotary kiln, the outer wall of which is fixedly connected to the end of the delivery pipe away from the liquid storage tank; a monitoring device, the outer wall of which is fixedly connected to the outer wall of the delivery pipe; and a regulating device disposed on the exterior of the delivery pipe. The regulating device includes a flow pipe, the outer wall of which is symmetrically fixedly connected to a control valve, a pneumatic diaphragm pump, a drain and drip valve, and an air source hose fixedly connected to the input end of the pneumatic diaphragm pump. The control valves provided on the flow pipe serve as front and rear hand valves, enabling switching between the two pumps. The pneumatic diaphragm pump can be removed and repaired by closing the front and rear hand valves and opening the drain and drip valve to release pressure and drain liquid.

[0004] Preferably, the flow tube is fixedly connected to the inner wall of the delivery tube via a tee. A manual ball valve is fixedly connected to the end of the air source hose away from the pneumatic diaphragm pump. The diaphragm pump is activated as a power source for liquid delivery. The other end of the air source hose is connected to a pneumatic stop valve, which controls the pneumatic diaphragm pump. The electromagnetic control and feedback signals of the pneumatic stop valve are connected to the workshop DCS system via a signal line.

[0005] Preferably, the outer wall of the air source hose is fixedly connected to a pneumatic stop valve, and the air source manual ball valve is arranged at the front end of the pneumatic stop valve. The air source manual ball valve is installed before the pneumatic stop valve so that the pneumatic stop valve can be removed for maintenance.

[0006] Preferably, the monitoring device includes a connecting tube, wherein a barrier is provided inside the connecting tube, the inner wall of the barrier is slidably connected to a slide rod, the outer wall of the barrier is fixedly connected to a push spring, the outer wall of the barrier is fixedly connected to a rack, and the inner wall of the connecting tube is rotatably connected to a rotating rod. The outer wall of the connecting tube is fixedly connected to the inner wall of the delivery pipe, the outer walls of both ends of the slide rod are fixedly connected to the inner wall of the connecting tube, and the end of the push spring away from the barrier is fixedly connected to the inner wall of the connecting tube. The waste liquid impacts the barrier, causing the barrier to slide on the slide rod and compress the push spring. Depending on the flow rate of the waste liquid, the impact force on the barrier varies, thereby compressing the push spring differently.

[0007] Preferably, a numerical dial is fixedly connected to the outer wall of the connecting tube, and the rotating rod extends through the connecting tube and extends to the outside of the connecting tube. The outer wall of the rotating rod is rotatably connected to the inner wall of the numerical dial. The outer wall of the rotating rod is fixedly connected to the outer wall of the rotating rod, and the gear ring meshes with the rack. The blocking plate drives the rack to move, and the meshing of the rack and gear ring drives the rotating rod to rotate. By observing the rotating rod drive the pointer on the numerical dial to rotate, the flow rate of the waste liquid can be observed.

[0008] The beneficial effects of the utility model are as follows:

[0009] 1. The utility model is provided with a regulating device. When encountering a liquid with a low boiling point, a viscous medium or a liquid that is at a low flow rate for a long time, the control pump inlet and outlet valves are opened, and the solenoid valve of the pneumatic stop valve is energized to open the valve, so that compressed air is supplied to the pneumatic diaphragm pump. The pneumatic diaphragm pump starts to reciprocate, pressurizing the waste liquid at the pump inlet and pumping it to the outlet. As long as the pipeline liquid pressure is less than the compressed air pressure, the pump will continue to work and transport the liquid. When the flow rate required by the incineration rotary kiln decreases, the pipeline liquid pressure will increase, the number of reciprocating motions of the pneumatic diaphragm pump will decrease, and the work done by the pneumatic diaphragm pump will decrease. However, the temperature of the waste liquid will not change at this time, and the physical state of the waste liquid in the pump membrane will not change. At the same time, due to the use of a pneumatic diaphragm pump instead of an electric diaphragm pump, the danger caused by overpressure at the pump outlet is avoided while ensuring the supply pressure to the burner, eliminating safety hazards.

[0010] 2. The utility model is provided with a monitoring device. When the waste liquid enters the connecting cylinder, the waste liquid impacts the barrier, causing the barrier to slide on the slide rod and squeeze the push spring. According to the different flow rates of the waste liquid, the impact force on the barrier is different, thereby compressing the push spring differently. The barrier drives the rack to move, drives the rotating rod to rotate, and observes that the rotating rod drives the pointer to rotate on the numerical dial, so as to observe the flow rate of the waste liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is the main view of the utility model;

[0012] Figure 2 It is a structural diagram of the regulating device of the utility model;

[0013] Figure 3 It is a structural diagram of the monitoring device of the utility model.

[0014] In the figure: 1. Liquid storage tank; 2. Delivery pipe; 3. Feed pump; 4. Monitoring device; 41. Connecting tube; 42. Blocking plate; 43. Sliding rod; 44. Push spring; 45. Rotating rod; 46. Rack; 47. Gear ring; 48. Numerical dial; 5. Adjusting device; 51. Flow pipe; 52. Control valve; 53. Drain valve; 54. Pneumatic diaphragm pump; 55. Air source hose; 56. Air source manual ball valve; 57. Pneumatic stop valve; 6. Incineration rotary kiln. DETAILED DESCRIPTION

[0015] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

[0016] Example:

[0017] See also Figure 1 - Figure 3 The utility model provides a technical solution: a conveying device for hazardous waste liquids, comprising: a liquid storage tank 1; a conveying pipe 2, the outer wall of the conveying pipe 2 is fixedly connected to the inner wall of the liquid storage tank 1; a feeding pump 3, the outer wall of the feeding pump 3 is fixedly connected to the outer wall of the conveying pipe 2; an incineration rotary kiln 6, the outer wall of the incineration rotary kiln 6 is fixedly connected to the end of the conveying pipe 2 away from the liquid storage tank 1; a monitoring device 4, the outer wall of the monitoring device 4 is fixedly connected to the outer wall of the conveying pipe 2; a regulating device 5, the regulating device 5 is arranged on the outside of the conveying pipe 2; the regulating device 5 includes a flow pipe 51, the outer wall of the flow pipe 51 is symmetrically fixedly connected with a control valve 52, the outer wall of the flow pipe 51 is fixedly connected with a pneumatic diaphragm pump 54, the outer wall of the flow pipe 51 is fixedly connected with a drainage guide valve 53, and the input end of the pneumatic diaphragm pump 54 is fixedly connected to an air source hose 55.

[0018] The circulation pipe 51 is fixedly connected to the inner wall of the delivery pipe 2 through a three-way pipe, and an end of the air source hose 55 away from the pneumatic diaphragm pump 54 is fixedly connected to an air source manual ball valve 56 .

[0019] A pneumatic stop valve 57 is fixedly connected to the outer wall of the air source hose 55 , and an air source manual ball valve 56 is arranged at the front end of the pneumatic stop valve 57 .

[0020] The monitoring device 4 includes a connecting tube 41, which is provided with a barrier 42. A slide rod 43 is slidably connected to the inner wall of the barrier 42. A push spring 44 is fixedly connected to the outer wall of the barrier 42. A rack 46 is fixedly connected to the outer wall of the barrier 42. A rotating rod 45 is rotatably connected to the inner wall of the connecting tube 41. The outer wall of the connecting tube 41 is fixedly connected to the inner wall of the conveying pipe 2. The outer walls of the slide rod 43 are fixedly connected to the inner wall of the connecting tube 41 at both ends. The end of the push spring 44 away from the barrier 42 is fixedly connected to the inner wall of the connecting tube 41.

[0021] The outer wall of the connecting tube 41 is fixedly connected to a numerical dial 48, the rotating rod 45 passes through the connecting tube 41 and extends to the outside of the connecting tube 41, the outer wall of the rotating rod 45 is rotatably connected to the inner wall of the numerical dial 48, and the outer wall of the rotating rod 45 is fixedly connected to a gear ring 47, which is engaged with the rack 46.

[0022] Working principle:

[0023] During use, the waste liquid is pumped into the liquid storage tank 1 in the tank area for temporary storage, and then the liquid in the liquid storage tank 1 is transported to the incineration rotary kiln 6 through the delivery pipe 2 by the feed pump 3 for combustion. The waste liquid is atomized by the burner outside the incineration rotary kiln 6 and then sprayed into the incineration rotary kiln 6 for combustion through the spray gun. When the liquid passes through the delivery pipe 2, the flow rate of the waste liquid is detected by the monitoring device 4. When the waste liquid enters the connecting tube 41, the waste liquid impacts the baffle 42, causing the baffle 42 to slide on the slide rod 43 and squeeze the push spring 44. According to the different flow rates of the waste liquid, the impact force on the baffle 42 is different, thereby the compression of the push spring 44 is different. When the baffle 42 moves, it drives the rack 46 to move, and through the engagement of the rack 46 and the gear ring 47, the rotating rod 45 is driven to rotate. By observing that the rotating rod 45 drives the pointer to rotate on the numerical dial 48, the flow rate of the waste liquid can be observed.

[0024] When transporting liquid hazardous waste with high boiling points, good fluidity, and high flow rates, the feed pump 3 can meet these requirements. For liquids with low boiling points, viscous media, or those experiencing long periods of low flow rates, the regulating device 5 can be switched. The control valves 52 at both ends of the flow tube 51 are opened, the drain valve 53 on the flow tube 51 is closed, and the manual air supply ball valve 56 is opened. If liquid is to be supplied to the incineration rotary kiln 6, the central control personnel click the start button on the DCS host computer. The DCS energizes the solenoid coil of the pneumatic shutoff valve 57, opening it and supplying compressed air to the pneumatic diaphragm pump 54 through the air supply hose 55. Simultaneously, the open / close status of the pneumatic shutoff valve 57 is fed back to the DCS via a feedback switch, allowing the central control system to monitor whether the pneumatic diaphragm pump 54 is currently operating. Upon receiving compressed air, the pneumatic diaphragm pump 54 reciprocates, pumping liquid from the inlet to the outlet of the flow tube 51. The frequency of this reciprocating motion decreases as the required flow rate decreases, until it reaches a near standstill. The temperature and properties of the liquid in the pipe and pump will not change.

[0025] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making any creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in this utility model shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A device for transporting hazardous waste liquids, characterized in that: include: Liquid storage tank (1); A delivery pipe (2), the outer wall of the delivery pipe (2) being fixedly connected to the inner wall of the liquid storage tank (1); A feed pump (3), the outer wall of the feed pump (3) is fixedly connected to the outer wall of the delivery pipe (2); An incineration rotary kiln (6), wherein the outer wall of the incineration rotary kiln (6) is fixedly connected to an end of the conveying pipe (2) away from the liquid storage tank (1); A monitoring device (4), the outer wall of the monitoring device (4) being fixedly connected to the outer wall of the delivery pipe (2); an adjusting device (5), the adjusting device (5) being arranged outside the delivery pipe (2); The regulating device (5) comprises a circulation pipe (51), the outer wall of the circulation pipe (51) is symmetrically fixedly connected to a control valve (52), the outer wall of the circulation pipe (51) is fixedly connected to a pneumatic diaphragm pump (54), the outer wall of the circulation pipe (51) is fixedly connected to a drainage and drainage valve (53), and the input end of the pneumatic diaphragm pump (54) is fixedly connected to an air source hose (55).

2. A device for transporting hazardous waste liquids according to claim 1, characterized in that: The circulation pipe (51) is fixedly connected to the inner wall of the delivery pipe (2) through a three-way pipe, and the end of the air source hose (55) away from the pneumatic diaphragm pump (54) is fixedly connected to an air source manual ball valve (56).

3. A hazardous waste liquid conveying device according to claim 2, characterized in that: The outer wall of the air source hose (55) is fixedly connected with a pneumatic stop valve (57), and the air source manual ball valve (56) is arranged at the front end of the pneumatic stop valve (57).

4. The device for transporting hazardous waste liquids according to claim 1, characterized in that: The monitoring device (4) includes a connecting tube (41), a baffle (42) is provided inside the connecting tube (41), the inner wall of the baffle (42) is slidably connected to a slide rod (43), the outer wall of the baffle (42) is fixedly connected to a push spring (44), the outer wall of the baffle (42) is fixedly connected to a rack (46), and the inner wall of the connecting tube (41) is rotatably connected to a rotating rod (45).

5. The device for transporting hazardous waste liquids according to claim 4, characterized in that: The outer wall of the connecting tube (41) is fixedly connected to the inner wall of the delivery pipe (2), the outer walls at both ends of the sliding rod (43) are fixedly connected to the inner wall of the connecting tube (41), and the end of the pushing spring (44) away from the blocking plate (42) is fixedly connected to the inner wall of the connecting tube (41).

6. The device for transporting hazardous waste liquids according to claim 5, characterized in that: The outer wall of the connecting tube (41) is fixedly connected to a numerical disk (48); the rotating rod (45) passes through the connecting tube (41) and extends to the outside of the connecting tube (41); the outer wall of the rotating rod (45) is rotatably connected to the inner wall of the numerical disk (48); the outer wall of the rotating rod (45) is fixedly connected to a gear ring (47); and the gear ring (47) is meshed with a rack (46).

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