Recovery apparatus for an evaporative condenser

Abstract

The utility model discloses a recovery device of evaporative condenser, including evaporative condenser, the bottom of evaporative condenser is circulating water tank, and the circulating water tank is connected through the communicating pipeline between, and the evaporative condenser is connected through condensing water pipe and collects the water tank, and is equipped with U type bend A on condensing water pipe, and the top of collecting the water tank is equipped with balance pipe in sealed mode, the bottom of collecting the water tank is equipped with condensing water outlet pipe, and is equipped with self -induction jar and condensing water pump on condensing water outlet pipe, and the top of condensing water pump and collecting the water tank is equipped with backflow pipe, through the utility model acetylene gas, VOCs gas, a small amount of calcium carbide lime in condensing water are recycled, reduce the chloride in the condensing water of evaporative condenser line pipe and corrode, reduce the maintenance frequency of evaporative condenser.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, and in particular to a condensate recovery device for evaporative condensers. Background Technology

[0002] The crude acetylene gas from the acetylene generator is cooled by an evaporative condenser, which consists of both water-cooled and air-cooled sections. The crude acetylene gas enters the tubes of the evaporative condenser, which uses water evaporation and forced air circulation to remove heat, thus cooling the gas. The water in the cooled crude acetylene gas is condensed, and part of the condensate is discharged into the evaporative condenser's circulating water tank. This condensate contains saturated acetylene, quicklime, and chloride ions. The water in the tank is circulated by a pump to cool the evaporative condenser. Because the chloride ions in the condensate are corrosive, they corrode the tubes during the cooling process, leading to tube breakage and affecting the heat exchange efficiency of the evaporative condenser. Simultaneously, the saturated acetylene in the circulating water is released into the atmosphere. The remaining condensate is discharged into an aqueduct. The aqueduct is not sealed, allowing acetylene and VOCs in the condensate to be released into the atmosphere. Acetylene is a flammable gas, posing a safety hazard, and this portion of acetylene cannot be recovered, increasing production costs and affecting acetylene production.

[0003] The evaporator condenser operates in multiple units simultaneously, and each evaporator condenser has an independent water supply line for its circulating water tank. It is difficult for inspectors to observe the liquid level of each circulating water tank in a timely manner. When the liquid level of the circulating water tank is too low and water is not replenished in time, the cooling effect of the evaporator condenser becomes poor. When the high-temperature crude acetylene gas enters the acetylene purification process, it will decompose sodium hypochlorite, resulting in the inability to remove sulfur and phosphorus in the acetylene. This will deactivate the catalyst of the converter and may even cause a safety accident. Summary of the Invention

[0004] This invention overcomes the shortcomings of existing technologies and provides a recovery device for evaporative condensers. The purpose is to solve the problem that the condensate generated after the crude acetylene gas is cooled down contains saturated acetylene gas, calcium lime, and chloride ions, which affects the cooling of the evaporative condenser, causing corrosion of the evaporative condenser tubes, difficulty in controlling the acetylene gas temperature, and the release of acetylene gas and VOCs into the atmosphere, polluting the environment.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: it includes an evaporative condenser, the bottom of which is a circulating water tank, the circulating water tanks are connected by a connecting pipeline, the evaporative condenser is connected to a water collection tank through a condensate pipe, and a U-shaped bend A is provided on the condensate pipe, the top of the water collection tank is sealed with a balance pipe, the bottom of the water collection tank is provided with a condensate outlet pipe, the condensate outlet pipe is provided with a self-priming tank and a condensate pump, and the condensate pump and the top of the water collection tank are provided with a return pipe.

[0006] Furthermore, the evaporator also includes an acetylene gas inlet pipe and an acetylene gas outlet pipe. The acetylene gas inlet pipe and the acetylene gas outlet pipe are equipped with U-shaped bends B and C, and a primary water pipe is provided. After adding water to the U-shaped bends B and C, acetylene gas is prevented from leaking to the outside.

[0007] Furthermore, a regulating valve is installed on the return pipe, and a remote level gauge A is installed at the bottom of the water collection tank. The regulating valve is electrically connected to the remote level gauge A. The water level in the water collection tank is monitored through the remote level gauge A. When the water level in the water collection tank is low, the opening of the regulating valve increases, and the flow rate of condensate returning to the water collection tank from the return pipe is greater than that of condensate sent to the recycling tank. When the water level in the water collection tank is high, the opening of the regulating valve decreases, and the flow rate of condensate returning to the water collection tank from the return pipe is less than that of condensate sent to the recycling tank, so that the water level in the water collection tank is controlled within the specified range.

[0008] Furthermore, the water collection tank is installed below the condensate pipe, and the condensate enters from the top of the water collection tank by utilizing the height difference.

[0009] Furthermore, a nitrogen pipeline is provided at the top of the water collection tank, which is used to replace acetylene and VOCs gas in the water collection tank during maintenance.

[0010] Furthermore, the top of the self-priming tank is equipped with a primary water pipe and a remote level gauge B. The liquid level in the self-priming tank is replenished to 1.00m-1.20m through the primary water pipe, so that the condensate pump can send the condensate in the collection tank to the generator for recycling.

[0011] Furthermore, the balance pipe is sealed with a shut-off valve, which enables timely disconnection from the acetylene gas outlet pipe in emergency and maintenance situations to prevent acetylene gas from leaking into the outside.

[0012] Compared with existing technologies, this utility model uses a closed-loop system of condensate pipes and collection tanks for water recovery and a series connection of circulating water tanks for water replenishment. On the one hand, acetylene gas, VOCs gas, and a small amount of calcium lime in the condensate are recovered, reducing the corrosion of the evaporator tubes by chloride ions in the condensate and lowering the frequency of evaporator maintenance. On the other hand, the circulating water tank is replenished in a timely manner, improving the cooling efficiency of the evaporator, improving the on-site environment, and increasing the safety factor of inspection staff. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the system of this utility model.

[0014] Figure 1In the diagram, 1 is the evaporator / condenser, 2 is the water collection tank, 3 is the circulating water tank, 4 is the connecting pipeline, 5 is the condensate pipe, 6 is U-bend A, 7 is the balance pipe, 8 is the condensate outlet pipe, 9 is the self-priming tank, 10 is the condensate pump, 11 is the return pipe, 12 is the acetylene gas inlet pipe, 13 is the acetylene gas outlet pipe, 14 is U-bend B, 15 is U-bend C, 16 is the primary water pipeline, 17 is the regulating valve, 18 is the remote level gauge A, 19 is the nitrogen pipe, 20 is the shut-off valve, and 21 is the remote level gauge B. Detailed Implementation

[0015] Reference Figure 1 The preferred embodiments of this utility model will be described in detail below.

[0016] Example 1: A recovery device for an evaporative condenser includes an evaporative condenser 1. The bottom of the evaporative condenser 1 is a circulating water tank 3. The water supply valve of the first circulating water tank 3 is normally open. The other circulating water tanks 3 are connected by a connecting pipeline 4. After the first circulating water tank 3 is filled with water, the water overflows to the next circulating water tank 3 through the connecting pipeline 4, maintaining the water level in the circulating water tanks at a constant level. The evaporative condenser 1 is connected to a water collection tank 2 via a condensate pipe 5, and a U-shaped bend A6 is provided on the condensate pipe 5. The installation height of the water collection tank 2 is lower than that of the condensate pipe 5, allowing the condensate to be collected in a sealed manner using the height difference. The U-shaped bend A prevents acetylene gas from entering the condensate pipe 5. The top of the water collection tank 2 is connected to an acetylene gas outlet pipe via a balance pipe 7, ensuring that the pressure inside the water collection tank 2 is the same as the pressure in the acetylene gas outlet pipe. The condensate in the middle of the water collection tank 2... Acetylene gas overflows and enters the acetylene gas outlet pipe 13 through the balance pipe. The bottom of the water collection tank 2 is equipped with a condensate outlet pipe 8, which is connected to the bottom of the self-priming tank 9. The bottom of the self-priming tank 9 is connected to the condensate pump 10. The condensate in the water collection tank 2 is drawn from the self-priming tank 9 by the condensate pump 10, and the condensate in the self-priming tank 9 is sent to the generator for recycling. The top of the self-priming tank 9 is equipped with a primary water pipe 16 and a remote level gauge B21. The remote level gauge B21 transmits the displayed level to the control room. When the level in the self-priming tank 9 is lower than 1.00m-1.20m, the primary water pipe is opened to replenish the self-priming tank 9, so that the condensate pump can send the condensate in the water collection tank to the generator for recycling. The condensate pump 10 and the top of the water collection tank 9 are equipped with a return pipe 11.

[0017] A regulating valve 17 is installed on the return pipe 11, and a remote level gauge A18 is installed at the bottom of the water collection tank 2. The regulating valve 17 is electrically connected to the remote level gauge A18. The water level in the water collection tank 2 is monitored by the remote level gauge A18. When the water level in the water collection tank 2 is low, the opening of the regulating valve 17 increases, and the flow rate of condensate returning from the return pipe 11 to the water collection tank 2 is greater than that of condensate sent to the recycling tank. When the water level in the water collection tank 2 is high, the opening of the regulating valve 17 decreases, and the flow rate of condensate returning from the return pipe 11 to the water collection tank 2 is less than that of condensate sent to the recycling tank, so that the water level in the water collection tank is controlled within the specified range.

[0018] Example 2: Compared with Example 1, the difference in this example is that it also includes an acetylene gas inlet pipe 12 and an acetylene gas outlet pipe 13 for the evaporator condenser 1. The acetylene gas inlet pipe 12 and the acetylene gas outlet pipe 13 are provided with U-shaped bends B14 and C15, and a primary water pipe 16 is provided. After adding primary water to U-shaped bends B14 and C15, when the evaporator condenser 1 is stopped, primary water is added to U-shaped bends B14 and C15 to block the acetylene gas. The balance pipe 7 is sealed and connected to the shut-off valve 20. A nitrogen pipe 19 is provided at the top of the water collection tank 2. The shut-off valve 20 is closed to prevent pressure fluctuations in the water collection tank 2, and nitrogen is introduced into the water collection tank 2 through the nitrogen pipe 19. The condensate pump 10 is turned off, and the self-priming tank 9 is stopped from replenishing water.

Claims

1. A recovery device for an evaporator condenser, characterized in that: The device includes an evaporative condenser, the bottom of which is a circulating water tank. The circulating water tanks are connected by a connecting pipeline. The evaporative condenser is connected to a water collection tank through a condensate pipe, and the condensate pipe is equipped with a U-bend A. The top of the water collection tank is equipped with a balance pipe with a sealing method. The bottom of the water collection tank is equipped with a condensate outlet pipe, and the condensate outlet pipe is equipped with a self-priming tank and a condensate pump. The condensate pump and the top of the water collection tank are equipped with a return pipe.

2. The recovery device for an evaporator condenser as described in claim 1, characterized in that: The device also includes an acetylene gas inlet pipe and an acetylene gas outlet pipe for the evaporator condenser. The acetylene gas inlet pipe and the acetylene gas outlet pipe are equipped with U-shaped bends B and C, and a primary water pipe is provided. After adding water to the U-shaped bends B and C, acetylene gas is prevented from leaking to the outside.

3. The recovery device for an evaporator condenser as described in claim 1, characterized in that: A regulating valve is installed on the return pipe, and a remote level gauge A is installed at the bottom of the water collection tank. The regulating valve is electrically connected to the remote level gauge A.

4. The recovery device for an evaporator condenser as described in claim 1, characterized in that: The water collection tank is installed below the condensate pipe, and the condensate enters from the top of the water collection tank by utilizing the height difference.

5. A recovery device for an evaporator condenser as described in claim 1, characterized in that: The top of the water collection tank is equipped with a nitrogen pipeline.

6. The recovery device for an evaporator condenser as described in claim 1, characterized in that: The top of the self-priming tank is equipped with a primary water pipe and a remote level gauge B. The liquid level in the self-priming tank is replenished to 1.00m-1.20m through the primary water pipe.

7. A recovery device for an evaporator condenser as described in claim 1, characterized in that: The balance pipe is sealed to the shut-off valve.

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