Carbide slag slurry heat energy recovery device

Abstract

The utility model relates to the technical field of energy recycling, in particular to a carbide slag slurry heat energy recovery device which comprises an acetylene gas generator, a carbide slag slurry head tank, a heat exchange device, an acetylene gas recovery tower and a carbide slag slurry concentration tank. A second carbide slag slurry pipeline is communicated between the carbide slag slurry head tank and the heat exchange device, and the heat exchange device is communicated with a first heating water return pipeline, a first steam pipeline, a second steam pipeline and a heating water supply pipeline; the heat exchange device and the acetylene gas recovery tower are communicated with a third carbide slag slurry pipeline, and the acetylene gas recovery tower is communicated with an acetylene gas pipeline. The device is reasonable and compact in structure and convenient to use, the carbide slag slurry is used for a heat supply system after being subjected to heat energy recovery, the effects of energy conservation and emission reduction are achieved, and the device has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of energy recycling and is a carbide slag slurry heat energy recovery device. Background Art

[0002] Acetylene is the simplest alkyne with the chemical formula C2H2. It is a flammable gas that is insoluble in water but soluble in acetone. Acetylene is an important petrochemical raw material and one of the important raw materials for organic synthesis. It can be used to synthesize monomers for rubber, synthetic fibers, and plastics. Acetylene can also be widely used in metal welding or cutting, and can also be used for oxy-acetylene welding and cutting.

[0003] A chemical enterprise adopts the technology of producing acetylene by hydrolysis of calcium carbide, using calcium carbide (calcium carbide) and water in an acetylene gas generator to produce acetylene. The chemical reaction equation is CaC2+2H2O==C2H2↑+Ca(OH)2. The reaction is an exothermic reaction. The reaction product is 80°C to 90°C calcium carbide slag slurry. After recovering the acetylene gas in the calcium carbide slag slurry, the calcium carbide slag slurry enters the slag slurry treatment process. Before the calcium carbide slag slurry enters the slag slurry treatment process, all the waste heat carried by the calcium carbide slag slurry is discharged into the atmosphere, resulting in a waste of energy. The continuous discharge of heat energy into the atmosphere also has a harmful impact on the atmospheric environment.

[0004] In the process of producing acetylene by hydrolysis of calcium carbide, effective heat recovery of reaction products, energy saving and reduction of heat emissions have become technical problems that a chemical company urgently needs to solve. Summary of the invention

[0005] The utility model provides a carbide slag slurry heat energy recovery device, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problem of energy waste in the process of treating carbide slag slurry of acetylene production product in existing chemical enterprises.

[0006] The technical scheme of the utility model is realized by the following measures: a carbide slag slurry heat energy recovery device, comprising an acetylene gas generator, a carbide slag slurry high-level tank, a heat exchange device, and an acetylene gas recovery tower; a first inlet at the top of the acetylene gas generator is fixedly connected to a carbide unloading pipeline; a second inlet at the top of the acetylene gas generator is fixedly connected to a water inlet pipeline; a first carbide slag slurry pipeline is fixedly connected between the upper liquid outlet of the acetylene gas generator and the top liquid inlet of the carbide slag slurry high-level tank; a lower liquid outlet of the carbide slag slurry high-level tank is fixedly connected to the first liquid inlet of the heat exchange device; A second carbide slag slurry pipeline is connected, the second liquid inlet of the heat exchanger is fixedly connected to the first heating return water pipeline, the air inlet of the heat exchanger is fixedly connected to the first steam pipeline, the air outlet of the heat exchanger is fixedly connected to the second steam pipeline, the first liquid outlet of the heat exchanger is fixedly connected to the heating water supply pipeline, the second liquid outlet of the heat exchanger and the upper liquid inlet of the acetylene gas recovery tower are fixedly connected with the third carbide slag slurry pipeline, the top air outlet of the acetylene gas recovery tower is fixedly connected to the acetylene gas pipeline, and the bottom liquid outlet of the acetylene gas recovery tower is fixedly connected to the carbide slag slurry concentration pipeline.

[0007] The following are further optimizations and / or improvements to the above utility model technical solution:

[0008] The above-mentioned heat exchange device includes a waste heat exchanger and a steam heat exchanger. A second carbide slag slurry pipeline is fixedly connected between the lower liquid outlet of the carbide slag slurry high-level tank and the top liquid inlet of the waste heat exchanger. The bottom liquid inlet of the waste heat exchanger is fixedly connected to a first heating return water pipeline. The bottom liquid outlet of the waste heat exchanger and the upper liquid inlet of the steam heat exchanger are fixedly connected to a second heating return water pipeline. The top liquid outlet of the waste heat exchanger and the upper liquid inlet of the acetylene gas recovery tower are fixedly connected to a third carbide slag slurry pipeline. The lower air inlet of the steam heat exchanger is fixedly connected to a first steam pipeline. The upper air outlet of the steam heat exchanger is fixedly connected to a second steam pipeline. The lower liquid outlet of the steam heat exchanger is fixedly connected to a heating water supply pipeline.

[0009] The above-mentioned device also includes a carbide slag slurry concentration tank, and a carbide slag slurry concentration pipeline is fixedly connected between the bottom liquid outlet of the acetylene gas recovery tower and the top liquid inlet of the carbide slag slurry concentration tank.

[0010] Remote liquid level gauges are fixedly installed on the above-mentioned carbide slag slurry high-level tank and carbide slag slurry concentration tank.

[0011] A carbide slag slurry delivery pump is fixedly installed on the second carbide slag slurry pipeline.

[0012] A first remote thermometer is fixedly installed on the second carbide slag slurry pipeline between the above-mentioned carbide slag slurry delivery pump and the top liquid inlet of the waste heat exchanger, a second remote thermometer is fixedly installed on the second heating return water pipeline, and a third remote thermometer is fixedly installed on the heating water supply pipeline.

[0013] A check valve is fixedly installed on the second carbide slag slurry pipeline between the carbide slag slurry delivery pump and the first remote thermometer.

[0014] A solenoid regulating valve and a remote pressure gauge are fixedly installed in sequence on the first steam pipeline along the medium flow direction.

[0015] The above-mentioned device also includes a controller, and the carbide slag slurry delivery pump, the remote liquid level meter, the first remote thermometer, the second remote thermometer, the third remote thermometer, the electromagnetic regulating valve, and the remote pressure gauge are all electrically connected to the controller.

[0016] The utility model has a reasonable and compact structure and is easy to use. It first recovers heat energy from carbide slag slurry, which can be used to heat the return water of the heating system and other heating energy systems, and then recovers acetylene gas. Finally, it enters the slag slurry treatment process for treatment, which not only avoids energy waste, but also reduces the steam consumption of the heating system, thereby achieving the effect of energy saving and emission reduction. It has the characteristics of safety, labor saving, simplicity and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 This is a schematic diagram of the process flow of the utility model.

[0018] Attached Figure 1 The codes are as follows: 1 is acetylene gas generator, 2 is carbide slag slurry high-level tank, 3 is acetylene gas recovery tower, 4 is carbide slag slurry concentration tank, 5 is carbide unloading pipeline, 6 is water inlet pipeline, 7 is the first carbide slag slurry pipeline, 8 is the second carbide slag slurry pipeline, 9 is the first heating water return pipeline, 10 is the second heating water return pipeline, 11 is the third carbide slag slurry pipeline, 12 is acetylene gas pipeline, 13 is carbide slag slurry concentration pipeline, 14 is waste heat exchanger, 15 is steam heat exchanger, 16 is the first steam pipeline, 17 is the second steam pipeline, 18 is the heating water supply pipeline, 19 is the carbide slag slurry delivery pump, 20 is the remote level gauge, 21 is the first remote thermometer, 22 is the second remote thermometer, 23 is the third remote thermometer, 24 is the check valve, 25 is the electromagnetic regulating valve, and 26 is the remote pressure gauge. DETAILED DESCRIPTION

[0019] The present invention is not limited by the following embodiments, and specific implementation methods can be determined according to the technical solution of the present invention and actual conditions.

[0020] In the present invention, unless otherwise specified, the equipment and devices used are all the equipment and devices known and used in the art.

[0021] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached manual. Figure 1The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 The layout direction is determined by the

[0022] The present invention is further described below in conjunction with the embodiments and drawings:

[0023] Embodiment 1: As attached Figure 1 As shown, the carbide slag slurry heat energy recovery device includes an acetylene gas generator 1, a carbide slag slurry high-level tank 2, a heat exchange device, and an acetylene gas recovery tower 3. The first inlet at the top of the acetylene gas generator 1 is fixedly connected to a carbide unloading pipeline 5, the second inlet at the top of the acetylene gas generator 1 is fixedly connected to a water inlet pipeline 6, the upper liquid outlet of the acetylene gas generator 1 and the top liquid inlet of the carbide slag high-level tank 2 are fixedly connected to a first carbide slag slurry pipeline 7, and the lower liquid outlet of the carbide slag high-level tank 2 and the first liquid inlet of the heat exchange device are fixedly connected to a second carbide slag slurry pipeline 8 The second liquid inlet of the heat exchanger is fixedly connected to the first heating return water pipeline 9, the air inlet of the heat exchanger is fixedly connected to the first steam pipeline 16, the air outlet of the heat exchanger is fixedly connected to the second steam pipeline 17, the first liquid outlet of the heat exchanger is fixedly connected to the heating water supply pipeline 18, the second liquid outlet of the heat exchanger and the upper liquid inlet of the acetylene gas recovery tower 3 are fixedly connected to the third carbide slag slurry pipeline 11, the top air outlet of the acetylene gas recovery tower 3 is fixedly connected to the acetylene gas pipeline 12, and the bottom liquid outlet of the acetylene gas recovery tower 3 is fixedly connected to the carbide slag slurry concentration pipeline 13.

[0024] The above carbide slag slurry heat energy recovery device can be further optimized and / or improved according to actual needs:

[0025] Embodiment 2: It is different from Embodiment 1 in that: Figure 1 As shown, the heat exchange device includes a waste heat exchanger 14 and a steam heat exchanger 15. A second carbide slag slurry pipeline 8 is fixedly connected between the lower liquid outlet of the carbide slag high-level tank 2 and the top liquid inlet of the waste heat exchanger 14. A first heating return water pipeline 9 is fixedly connected to the bottom liquid inlet of the waste heat exchanger 14. A second heating return water pipeline 10 is fixedly connected between the bottom liquid outlet of the waste heat exchanger 14 and the upper liquid inlet of the steam heat exchanger 15. A third carbide slag slurry pipeline 11 is fixedly connected between the top liquid outlet of the waste heat exchanger 14 and the upper liquid inlet of the acetylene gas recovery tower 3. A first steam pipeline 16 is fixedly connected to the lower air inlet of the steam heat exchanger 15. A second steam pipeline 17 is fixedly connected to the upper air outlet of the steam heat exchanger 15. A heating water supply pipeline 18 is fixedly connected to the lower liquid outlet of the steam heat exchanger 15.

[0026] As needed, the waste heat exchanger 14 and the steam heat exchanger 15 are both shell-and-tube heat exchangers. Calcium carbide and water react exothermically in the acetylene gas generator 1 to obtain calcium carbide slag slurry with a temperature of 80°C to 90°C. The reaction heat of the calcium carbide slag slurry is recovered and reused through the waste heat exchanger 14, and the heating return water is pre-heated. The heating return water is then heated for a second time through the steam heat exchanger 15 to obtain heating water supply of the required temperature, thereby reducing the steam consumption of the steam heat exchanger 15, reducing the cost of the heating system, realizing the secondary recovery and utilization of energy, and achieving the effect of energy saving and consumption reduction.

[0027] As needed, the second carbide slag slurry pipeline 8 can also be used as a heating tape pipeline for other devices. The thermal insulation layer is one of the insulation methods for special process pipelines and equipment. However, in areas with severe winter cold, additional heating tape pipelines are required to provide anti-freezing and heating insulation for special process pipelines and equipment. This device can not only realize the recovery and reuse of heat energy, but also reduce the safety hazards in the production equipment, thereby realizing the safe, stable and efficient operation of the production equipment.

[0028] Embodiment 3: It differs from Embodiment 1 to Embodiment 2 in that: Figure 1 As shown, the device also includes a carbide slag slurry concentration tank 4, and a carbide slag slurry concentration pipeline 13 is fixedly connected between the bottom liquid outlet of the acetylene gas recovery tower 3 and the top liquid inlet of the carbide slag slurry concentration tank 4.

[0029] Embodiment 4: It differs from Embodiments 1 to 3 in that: Figure 1 As shown, a carbide slag slurry delivery pump 19 is fixedly installed on the second carbide slag slurry pipeline 8.

[0030] Embodiment 5: It differs from Embodiments 1 to 4 in that: Figure 1 As shown, the carbide slag slurry high-level tank 2 and the carbide slag slurry concentration tank 4 are both fixedly installed with remote liquid level meters 20.

[0031] Embodiment 6: It differs from Embodiments 1 to 5 in that: Figure 1 As shown, a first remote thermometer 21 is fixedly installed on the second carbide slag slurry pipeline 8 between the carbide slag slurry delivery pump 19 and the top liquid inlet of the waste heat exchanger 14, a second remote thermometer 22 is fixedly installed on the second heating return water pipeline 10, and a third remote thermometer 23 is fixedly installed on the heating water supply pipeline 18.

[0032] As required, the first remote thermometer 21 shows that the temperature of the carbide slag slurry in the second carbide slag slurry pipeline is 80°C to 90°C.

[0033] Embodiment 7: It differs from Embodiments 1 to 6 in that: Figure 1As shown, a check valve 24 is fixedly installed on the second carbide slag slurry pipeline 8 between the carbide slag slurry delivery pump 19 and the first remote thermometer 21.

[0034] As required, the check valve 24 can prevent the carbide slag slurry delivery pump 19 from cavitation failure during production operation.

[0035] Embodiment 8: It differs from Embodiments 1 to 7 in that: Figure 1 As shown, a solenoid regulating valve 25 and a remote pressure gauge 26 are fixedly installed in sequence on the first steam pipeline 16 along the flow direction of the medium.

[0036] Embodiment 9: It differs from Embodiments 1 to 8 in that: Figure 1 As shown, the device also includes a controller, and the carbide slag slurry delivery pump 19, the remote liquid level meter 20, the first remote thermometer 21, the second remote thermometer 22, the third remote thermometer 23, the electromagnetic regulating valve 25, and the remote pressure gauge 26 are all electrically connected to the controller.

[0037] As needed, the opening of the electromagnetic regulating valve 25 can be adjusted according to the primary heat exchange temperature of the heating return water displayed by the second remote thermometer 22, and the steam input of the steam heat exchanger 15 can be reduced as needed. The steam delivery pressure can also be displayed by the remote pressure gauge 26 to indicate the steam input of the steam heat exchanger 15.

[0038] According to the needs, the pipelines and equipment of the carbide slag slurry heat recovery device can also be equipped with conventional valves, thermometers and pressure gauges known in the art according to production needs. The controller is a DCS controller, and the model of the DCS controller can be the CS3000 controller produced by Yokogawa Corporation of Japan.

[0039] The above technical features constitute the embodiments of the present utility model, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

[0040] The use process of the embodiment of the utility model is as follows: first, calcium carbide powder enters the acetylene gas generator 1 through the calcium carbide discharge pipeline 5, clean water enters the acetylene gas generator 1 through the water inlet pipeline 6, the calcium carbide powder and the clean water react exothermically in the acetylene gas generator 1 to obtain calcium carbide slag slurry, and the calcium carbide slag slurry then enters the calcium carbide slag slurry high-level tank 2 through the first calcium carbide slag slurry pipeline 7 for temporary storage; then, under the circulating force of the calcium carbide slag slurry delivery pump 19, the calcium carbide slag slurry enters the waste heat exchanger 14 through the second calcium carbide slag slurry pipeline 8, the warm air return water entering the waste heat exchanger 14 is pre-heated and heated, and the calcium carbide slag slurry after heat exchange and cooling is passed through the third calcium carbide slag slurry pipeline 8. 11 enters the acetylene gas recovery tower 3; then, after the acetylene gas recovery tower 3 recovers the acetylene gas in the carbide slag slurry, acetylene gas and carbide slag slurry concentrate are obtained, and the carbide slag slurry concentrate enters the carbide slag slurry concentration tank 4 through the carbide slag slurry concentration pipeline 13 for temporary storage, and the acetylene gas enters the downstream process system through the acetylene gas pipeline 12; finally, the heating return water preheated in the waste heat exchanger 14 enters the steam heat exchanger 15 through the second heating return water pipeline 10, and the steam in the steam heat exchanger 15 heats the preheated heating return water again to obtain the required temperature of heating water supply, and the required temperature of heating water supply enters the downstream heating system through the heating water supply pipeline 18.

Claims

1. A carbide slag slurry heat recovery device, characterized in that The utility model comprises an acetylene gas generator, a carbide slag slurry high-level tank, a heat exchange device, and an acetylene gas recovery tower. The first inlet at the top of the acetylene gas generator is fixedly connected with a carbide unloading pipeline, the second inlet at the top of the acetylene gas generator is fixedly connected with a water inlet pipeline, the upper liquid outlet of the acetylene gas generator and the top liquid inlet of the carbide slag slurry high-level tank are fixedly connected with a first carbide slag slurry pipeline, the lower liquid outlet of the carbide slag slurry high-level tank and the first liquid inlet of the heat exchange device are fixedly connected with a second carbide slag slurry pipeline, the second carbide slag slurry pipeline is fixedly connected with the first liquid inlet of the heat exchange device, and the second carbide slag slurry pipeline is fixedly connected with the first carbide slag slurry pipeline. The second liquid inlets are fixedly connected to the first heating return pipeline, the air inlet of the heat exchanger is fixedly connected to the first steam pipeline, the air outlet of the heat exchanger is fixedly connected to the second steam pipeline, the first liquid outlet of the heat exchanger is fixedly connected to the heating water supply pipeline, the second liquid outlet of the heat exchanger and the upper liquid inlet of the acetylene gas recovery tower are fixedly connected to the third carbide slag slurry pipeline, the top air outlet of the acetylene gas recovery tower is fixedly connected to the acetylene gas pipeline, and the bottom liquid outlet of the acetylene gas recovery tower is fixedly connected to the carbide slag slurry concentration pipeline.

2. The carbide slag slurry heat recovery device according to claim 1, characterized in that The heat exchange device includes a waste heat exchanger and a steam heat exchanger. A second carbide slag slurry pipeline is fixedly connected between the lower liquid outlet of the carbide slag slurry high-level tank and the top liquid inlet of the waste heat exchanger. The bottom liquid inlet of the waste heat exchanger is fixedly connected to a first heating return water pipeline. The bottom liquid outlet of the waste heat exchanger and the upper liquid inlet of the steam heat exchanger are fixedly connected to a second heating return water pipeline. The top liquid outlet of the waste heat exchanger and the upper liquid inlet of the acetylene gas recovery tower are fixedly connected to a third carbide slag slurry pipeline. The lower air inlet of the steam heat exchanger is fixedly connected to a first steam pipeline. The upper air outlet of the steam heat exchanger is fixedly connected to a second steam pipeline. The lower liquid outlet of the steam heat exchanger is fixedly connected to a heating water supply pipeline.

3. The carbide slag slurry heat recovery device according to claim 1 or 2, characterized in that It also includes a carbide slag slurry concentration tank, and a carbide slag slurry concentration pipeline is fixedly connected between the bottom liquid outlet of the acetylene gas recovery tower and the top liquid inlet of the carbide slag slurry concentration tank.

4. The carbide slag slurry heat recovery device according to claim 1 or 2, characterized in that A remote level gauge is fixedly installed on the carbide slag slurry high-level tank and the carbide slag slurry concentration tank, and / or a carbide slag slurry delivery pump is fixedly installed on the second carbide slag slurry pipeline.

5. The carbide slag slurry heat recovery device according to claim 3 is characterized in that A remote level gauge is fixedly installed on the carbide slag slurry high-level tank and the carbide slag slurry concentration tank, and / or a carbide slag slurry delivery pump is fixedly installed on the second carbide slag slurry pipeline.

6. The carbide slag slurry heat recovery device according to claim 4, characterized in that A first remote thermometer is fixedly installed on the second carbide slag slurry pipeline between the carbide slag slurry delivery pump and the top liquid inlet of the waste heat exchanger, a second remote thermometer is fixedly installed on the second heating return water pipeline, and a third remote thermometer is fixedly installed on the heating water supply pipeline.

7. The carbide slag slurry heat recovery device according to claim 5, characterized in that A first remote thermometer is fixedly installed on the second carbide slag slurry pipeline between the carbide slag slurry delivery pump and the top liquid inlet of the waste heat exchanger, a second remote thermometer is fixedly installed on the second heating return water pipeline, and a third remote thermometer is fixedly installed on the heating water supply pipeline.

8. The carbide slag slurry heat recovery device according to claim 1, 2, 5, 6 or 7, characterized in that On the first steam pipeline, electromagnetic regulating valves and remote pressure gauges are fixedly installed in sequence along the medium flow direction.

9. The carbide slag slurry heat recovery device according to claim 8, characterized in that A check valve is fixedly installed on the second carbide slag slurry pipeline between the carbide slag slurry delivery pump and the first remote thermometer.

10. The carbide slag slurry heat recovery device according to claim 9, characterized in that It also includes a controller, and the carbide slag slurry delivery pump, the remote liquid level meter, the first remote thermometer, the second remote thermometer, the third remote thermometer, the electromagnetic regulating valve, and the remote pressure gauge are all electrically connected to the controller.

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