Waste heat utilization device at outlet of graphite heat exchanger in phosphoric acid workshop

Abstract

The utility model discloses a waste heat utilization device of a phosphoric acid workshop graphite heat exchanger outlet, and relates to the technical field of waste heat recovery. The device comprises a heat exchange part and a detection circulation part, the heat exchange part comprises a shell barrel and a heat exchange sleeve, liquid path pipelines are arranged on the side walls of the two sides of the shell barrel respectively, the heat exchange sleeve is vertically and fixedly sleeved with the shell barrel, the lower end of the heat exchange sleeve penetrates through a bottom shell of the shell barrel, and the detection circulation part is installed at the upper end of the shell barrel. The inlet end of the detection circulation part is communicated with the upper end of the heat exchange sleeve, and water is contained in the shell cylinder. Heat in liquid discharged from the outlet end of the graphite heat exchanger is transferred to water in the shell cylinder through the heat exchange sleeve, and heat recovery is achieved; the temperature of the liquid subjected to heat recovery of the heat exchange sleeve is detected through the detection circulation component, discharge or circulation of the liquid is controlled according to temperature feedback, and the technical effect of fully recovering the heat of the liquid is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of waste heat recovery, especially relates to a waste heat utilization device of phosphoric acid workshop graphite heat exchanger outlet. BACKGROUND

[0002] Phosphoric acid preparation needs to use graphite heat exchanger to exchange heat, and after the graphite heat exchanger exchanges heat with phosphoric acid, the heat exchanger is not fully heat-exchanged, part of heat is not fully exchanged and is taken away, thereby causing heat loss, increasing production cost, so that waste heat recovery component is installed at the outlet end of the graphite heat exchanger, and the liquid that is not fully heat-exchanged is heat-recovered, and whether the heat in the liquid is fully recovered cannot be judged during the waste heat recovery process, the liquid that is not fully recovered is directly discharged, which causes insufficient waste heat recovery and makes the energy-saving effect not obvious.

[0003] Therefore, the waste heat utilization device of phosphoric acid workshop graphite heat exchanger outlet is provided to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a waste heat utilization device of phosphoric acid workshop graphite heat exchanger outlet, which comprises a heat exchange component and a detection circulation component, the heat exchange component comprises a shell cylinder and a heat exchange sleeve, liquid channel pipes are arranged on the two side walls of the shell cylinder, the heat exchange sleeve is vertically fixed in the shell cylinder, the lower end of the heat exchange sleeve penetrates the bottom shell of the shell cylinder, the detection circulation component is installed on the upper end of the shell cylinder, the inlet end of the detection circulation component is communicated with the upper end of the heat exchange sleeve, and the shell cylinder contains water.

[0005] To solve the above technical problems, the utility model is realized through the following technical schemes:

[0006] The utility model discloses a waste heat utilization device of phosphoric acid workshop graphite heat exchanger outlet, which comprises a heat exchange component and a detection circulation component, the heat exchange component comprises a shell cylinder and a heat exchange sleeve, liquid channel pipes are arranged on the two side walls of the shell cylinder, the heat exchange sleeve is vertically fixed in the shell cylinder, the lower end of the heat exchange sleeve penetrates the bottom shell of the shell cylinder, the detection circulation component is installed on the upper end of the shell cylinder, the inlet end of the detection circulation component is communicated with the upper end of the heat exchange sleeve, and the shell cylinder contains water.

[0007] The utility model further sets up, and the upper end of heat exchange sleeve is heat exchange square tube and lower end is liquid inlet round pipe, two square ring cylinders are fixedly sleeved in heat exchange square tube, four outer side walls of square ring cylinder are pasted with four inner side walls of heat exchange square tube respectively, and the pipe wall of both sides of square ring cylinder is respectively communicated with the communicating pipe, and both sides communicating pipe penetrates the pipe wall of both sides of heat exchange square tube and is communicated with shell cylinder.

[0008] The utility model further sets up, the heat exchange square tube is fixedly sleeved with the inner heat exchange cylinder, the inner heat exchange cylinder is between two square ring cylinders, and the four side walls of the inner heat exchange cylinder are left with the clearance between the inner wall of the heat exchange square tube, and the two side walls of the inner heat exchange cylinder are respectively communicated with the communicating pipe, and the two side communicating pipes respectively penetrate the two side walls of the heat exchange square tube and are communicated with the shell cylinder.

[0009] The utility model further sets up, the detection circulation part includes the outlet pipe, control valve assembly and temperature detector, and the lower end of the outlet pipe is fixedly provided with the connecting square pipe, the connecting square pipe penetrates the shell cylinder and is fixedly connected with the upper end of the heat exchange square tube, the middle section of the outlet pipe is horizontally communicated with the return branch pipe, the control valve assembly is installed in the return branch pipe, the temperature detector is fixedly installed in the outlet pipe, and the return branch pipe is communicated with the side wall of the liquid inlet circular pipe at the lower end of the heat exchange sleeve through the pipeline.

[0010] The utility model further sets up, the control valve assembly includes the valve core and the air cylinder, the air cylinder is installed on the pipe wall on the side of the outlet pipe away from the return branch pipe, the valve core sliding cylinder sleeve is connected in the return branch pipe, and the telescopic end of the air cylinder penetrates the pipe wall of the outlet pipe and is fixedly connected with the valve core.

[0011] The utility model further sets up, the valve core is the cylinder of one end opening and the other end closing, and the cylinder closed end of the valve core is toward the air cylinder, and the cylinder middle section lower side pipe wall of the valve core is provided with the gate hole.

[0012] The utility model further sets up, and the temperature detector is installed between the return branch pipe and the connecting square pipe.

[0013] The utility model has the following beneficial effects:

[0014] The utility model passes through the heat exchange sleeve of being fixedly sleeved in the shell cylinder in the heat exchange part, and is communicated with the liquid path pipeline on the two sides of the shell cylinder, makes the heat exchange sleeve the heat of the liquid of graphite heat exchanger export end discharge is transmitted to the water in the shell cylinder, realizes the recycling to heat.

[0015] The utility model passes through the detection circulation part being installed on the upper end of the shell cylinder and being communicated with the heat exchange sleeve, and the liquid that passes through the heat recovery of the heat exchange sleeve is detected to temperature by the detection circulation part, and according to temperature feedback controls the discharge or circulation of liquid, realizes the technical effect of the full recovery of liquid heat.

[0016] Of course, any product implementing the utility model does not necessarily need to achieve all the advantages described above. DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description, obviously, the drawings described in the following description are only some embodiments of the present application, and for the ordinary skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 It is a structure schematic view of a waste heat utilization device of a phosphoric acid plant graphite heat exchanger outlet;

[0019] Figure 2 It is a side sectional view of a heat exchange component;

[0020] Figure 3 It is a dissection view of a heat exchange sleeve;

[0021] Figure 4 It is a partial dissection view of the present application;

[0022] Figure 5 It is a structure schematic view of a control valve assembly;

[0023] In the drawings, the component list represented by each sign is as follows:

[0024] 1-heat exchange component, 101-housing cylinder, 101a-liquid path pipeline, 102-heat exchange sleeve, 102a-heat exchange square tube, 102a-1-square ring cylinder, 102a-2-communication pipe, 102a-3-internal heat exchange cylinder, 102b-liquid inlet round pipe, 2-detection circulating component, 201-outlet pipe, 201a-connected square pipe, 201b-backflow branch pipe, 202-control valve assembly, 202a-valve core, 202a-1-gate hole, 202b-cylinder, 203-temperature detector. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the present application will be described clearly and completely in the following by combining with the drawings in the embodiments of the present application, obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the ordinary skilled in the art without creative labor are within the protection scope of the present application. Embodiment 1

[0026] Please refer to Figures 1 to 3The utility model discloses a phosphoric acid workshop graphite heat exchanger export's waste heat utilization device, including heat exchange component 1 and detection circulation component 2, heat exchange component 1 includes shell cylinder 101 and heat exchange sleeve 102, through the fixed sleeve heat exchange sleeve 102 in shell cylinder 101 in heat exchange component 1, and is communicated liquid path pipeline 101a respectively in both sides of shell cylinder 101, make heat exchange sleeve 102 discharge the heat transfer in the liquid of graphite heat exchanger export end to the water in shell cylinder 101, realize the recovery to heat, through the detection circulation component 2 installation on the upper end of shell cylinder 101 and with heat exchange sleeve 102 communicate, by detection circulation component 2 to the liquid of heat recovery through heat exchange sleeve 102 temperature detection, and according to temperature feedback control liquid discharge or circulation, realize the technical effect of the full recovery to liquid heat.

[0027] Specifically, the liquid path pipeline 101a is arranged on the two side walls of the shell cylinder 101, the heat exchange sleeve 102 is vertically fixed in the shell cylinder 101, the lower end of the heat exchange sleeve 102 penetrates the bottom shell of the shell cylinder 101, the detection circulation component 2 is installed on the upper end of the shell cylinder 101, the inlet end of the detection circulation component 2 is communicated with the upper end of the heat exchange sleeve 102, and the shell cylinder 101 contains water.

[0028] Further, the upper end of the heat exchange sleeve 102 is a heat exchange square tube 102a, and the lower end is an inlet liquid circular tube 102b, two square ring cylinders 102a-1 are fixedly sleeved in the heat exchange square tube 102a, four outer side walls of the square ring cylinder 102a-1 are attached to four inner side walls of the heat exchange square tube 102a respectively, and two side wall connecting pipes 102a-2 are communicated with the two side walls of the heat exchange square tube 102a respectively and communicated with the shell cylinder 101, the liquid discharged from the graphite heat exchanger passes through the square ring cylinder 102a-1, so that the liquid and the square ring cylinder 102a-1 fully perform heat transfer, and the heat exchange efficiency is improved.

[0029] Further, the heat exchange square tube 102a is fixedly sleeved with an inner heat exchange cylinder 102a-3, the inner heat exchange cylinder 102a-3 is between the two square ring cylinders 102a-1, gaps are left between four side walls of the inner heat exchange cylinder 102a-3 and the inner wall of the heat exchange square tube 102a, two side wall connecting pipes 102a-2 are communicated with the two side walls of the heat exchange square tube 102a respectively and communicated with the shell cylinder 101, and the liquid flows through the side of the inner heat exchange cylinder 102a-3, so that the heat exchange efficiency is further improved.

[0030] The operation process of the embodiment is as follows:

[0031] The liquid inlet pipe 102b at the lower end of the heat exchange sleeve 102 is butted against the outlet end of the graphite heat exchanger. The liquid in the graphite heat exchanger is discharged into the heat exchange sleeve 102 and is fully heat exchanged with the inner heat exchange cylinder 102a-3 through the square ring cylinder 102a-1, so that the water in the shell cylinder 101 is warmed up, achieving the technical effect of recovering heat. The liquid after heat exchange enters the detection circulating part 2 from one end of the heat exchange square pipe 102a. When the liquid temperature is high, the detection circulating part 2 controls the liquid backflow for further heat exchange, so as to fully recover the heat of the discharged liquid in the graphite heat exchanger. Embodiment 2

[0032] Please refer to Figures 1 to 5 On the basis of embodiment 1, the detection circulating part 2 comprises an outlet pipe 201, a control valve assembly 202 and a temperature detector 203. The temperature of the liquid discharged from the heat exchange square pipe 201a is detected by the temperature detector 203, and the control valve assembly 202 controls the backflow or discharge of the liquid according to the temperature feedback.

[0033] Specifically, the lower end of the outlet pipe 201 is fixedly provided with a connecting square pipe 201a, the connecting square pipe 201a penetrates the shell cylinder 101 and is fixedly connected with the upper end of the heat exchange square pipe 102a. The middle section of the outlet pipe 201 is horizontally communicated with a backflow branch pipe 201b, the control valve assembly 202 is installed in the backflow branch pipe 201b, the temperature detector 203 is fixedly installed in the outlet pipe 201, and the backflow branch pipe 201b is communicated with the side wall of the liquid inlet pipe 102b at the lower end of the heat exchange sleeve 102 through a pipeline.

[0034] Further, the control valve assembly 202 comprises a valve core 202a and a gas cylinder 202b. The gas cylinder 202b is installed on the pipe wall of the outlet pipe 201 away from the backflow branch pipe 201b, the valve core 202a is sleeved in the backflow branch pipe 201b, and the telescopic end of the gas cylinder 202b penetrates the pipe wall of the outlet pipe 201 and is fixedly connected with the valve core 202a. When the liquid temperature is low and the heat is not needed to be recovered by heat exchange again, the gas cylinder 202b pushes the valve core 202a into the backflow branch pipe 201b, so as to block the backflow branch pipe 201b and make the liquid discharged from the outlet pipe 201.

[0035] Further, the valve core 202a is a cylindrical body with one end open and the other end closed. The closed end of the valve core 202a faces the gas cylinder 202b, and the lower pipe wall of the middle section of the valve core 202a is provided with a gate hole 202a-1. When the liquid temperature is high and the heat needs to be recovered again, the gas cylinder pulls the valve core 202a to make the closed end of the valve core 202a tightly contact with the pipe wall of the outlet pipe 201, so as to make the liquid enter the backflow branch pipe 201b from the gate hole 202a-1 of the valve core 202a, and make the liquid backflow to the liquid inlet pipe 102b, so as to make the heat exchange square pipe 102a heat exchange again.

[0036] Further, the temperature detector 203 is installed between the return branch pipe 201b and the connecting pipe 201a.

[0037] The operation process of the embodiment is as follows:

[0038] The liquid after heat exchange in the heat exchange square pipe 102a enters the outlet pipe 201 and is detected by the temperature detector 203. When the liquid temperature is high and needs to be heat exchanged again to recover heat, the cylinder pulls the valve core 202a to make the closed end of the valve core 202a tightly adhere to the wall of the outlet pipe 201, so that the liquid enters the return branch pipe 201b from the gate hole 202a-1 of the valve core 202a, and the liquid returns to the liquid inlet pipe 102b, so that the heat exchange square pipe 102a is heat exchanged again, so that the heat in the liquid is fully recovered. When the temperature detected by the temperature detector 203 is low, the cylinder 202b pushes the valve core 202a into the return branch pipe 201b to block the return branch pipe 201b, so that the liquid is discharged from the outlet pipe 201.

[0039] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A waste heat recovery device at the outlet of a graphite heat exchanger in a phosphoric acid workshop, characterized in that: The device includes a heat exchange component (1) and a detection circulation component (2). The heat exchange component (1) includes an outer shell cylinder (101) and a heat exchange sleeve (102). Liquid passage pipes (101a) are respectively opened on the two side walls of the outer shell cylinder (101). The heat exchange sleeve (102) is vertically fixedly sleeved inside the outer shell cylinder (101). The lower end of the heat exchange sleeve (102) penetrates the bottom shell of the outer shell cylinder (101). The detection circulation component (2) is installed at the upper end of the outer shell cylinder (101). The inlet end of the detection circulation component (2) is connected to the upper end of the heat exchange sleeve (102). The outer shell cylinder (101) is filled with water.

2. The waste heat recovery device at the outlet of a graphite heat exchanger in a phosphoric acid workshop according to claim 1, characterized in that: The upper end of the heat exchange sleeve (102) is a heat exchange square tube (102a) and the lower end is a liquid inlet round tube (102b). Two square annular cylinders (102a-1) are fixedly sleeved inside the heat exchange square tube (102a). The four outer side walls of the square annular cylinders (102a-1) are respectively attached to the four inner side walls of the heat exchange square tube (102a). The two side walls of the square annular cylinders (102a-1) are respectively connected to the connecting pipes (102a-2). The two connecting pipes (102a-2) on both sides pass through the two side walls of the heat exchange square tube (102a) and are connected to the outer shell cylinder (101).

3. The waste heat recovery device at the outlet of a graphite heat exchanger in a phosphoric acid workshop according to claim 2, characterized in that: An inner heat exchange cylinder (102a-3) is fixedly sleeved inside the heat exchange square tube (102a). The inner heat exchange cylinder (102a-3) is located between two square annular cylinders (102a-1). There is a gap between the four side walls of the inner heat exchange cylinder (102a-3) and the inner wall of the heat exchange square tube (102a). The two side walls of the inner heat exchange cylinder (102a-3) are respectively connected to the connecting pipes (102a-2). The two connecting pipes (102a-2) pass through the two side walls of the heat exchange square tube (102a) and are connected to the outer shell cylinder (101).

4. The waste heat recovery device at the outlet of a graphite heat exchanger in a phosphoric acid workshop according to claim 2, characterized in that: The detection circulation component (2) includes an outlet pipe (201), a control valve assembly (202), and a temperature detector (203). A connecting square pipe (201a) is fixedly provided at the lower end of the outlet pipe (201). The connecting square pipe (201a) passes through the outer shell (101) and is fixedly connected to the upper end of the heat exchange square pipe (102a). A return branch pipe (201b) is horizontally connected in the middle section of the outlet pipe (201). The control valve assembly (202) is installed in the return branch pipe (201b). The temperature detector (203) is fixedly installed in the outlet pipe (201). The return branch pipe (201b) is connected to the side wall of the liquid inlet round pipe (102b) at the lower end of the heat exchange sleeve (102) through a pipe.

5. The waste heat recovery device at the outlet of a graphite heat exchanger in a phosphoric acid workshop according to claim 4, characterized in that: The control valve assembly (202) includes a valve core (202a) and a cylinder (202b). The cylinder (202b) is installed on the pipe wall of the outlet pipe (201) away from the return branch pipe (201b). The valve core (202a) is sleeved inside the return branch pipe (201b). The telescopic end of the cylinder (202b) penetrates the pipe wall of the outlet pipe (201) and is fixedly connected to the valve core (202a).

6. The waste heat recovery device at the outlet of a graphite heat exchanger in a phosphoric acid workshop according to claim 5, characterized in that: The valve core (202a) is a cylindrical shape with one end open and the other end closed. The closed end of the cylinder of the valve core (202a) faces the cylinder (202b). A gate hole (202a-1) is opened on the lower side wall of the middle section of the cylinder of the valve core (202a).

7. The waste heat recovery device at the outlet of a graphite heat exchanger in a phosphoric acid workshop according to claim 4, characterized in that: The temperature detector (203) is installed between the return branch pipe (201b) and the connecting square pipe (201a).

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