Condenser anti-blocking system

Abstract

The utility model provides an anti-blocking system for a condenser, and relates to the technical field of chemical engineering. The condenser anti-blocking system comprises a first condenser and a temperature adjusting water tank, a temperature adjusting water feeding pipeline and a temperature adjusting water return pipeline are arranged on the temperature adjusting water tank, a refrigerant inlet of the first condenser is connected with the temperature adjusting water feeding pipeline, and a refrigerant outlet of the first condenser is connected with the temperature adjusting water return pipeline. A water pump and a second condenser are arranged on the temperature adjusting water feeding pipeline, and a steam condensate pipeline and a desalted water pipeline are further arranged on the temperature adjusting water tank. The condenser can be prevented from being blocked, the production efficiency can be improved, and the safety risk is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a chemical industry technical field, specifically, relate to a condenser anti -blocking system. BACKGROUND

[0002] In the process of preparing cyclic carbonate by urea method, the reaction needs to occur in the reaction kettle, and a large amount of high-temperature gaseous mixture is generated after the reaction is completed, which needs to be discharged from the upper end of the reaction kettle. On the one hand, the mixture itself has a high temperature, and direct discharge may cause danger, on the other hand, the mixture may have components that can be recycled or products obtained by production, so related equipment is needed to cool the mixture.

[0003] The cooling equipment used in the prior art is a condenser, which is arranged on the pipeline for discharging the mixture and can cool the material passing through. However, during the cooling process, the condenser is often blocked, which affects the system operation. After analysis, the blocking reason is that the condenser uses circulating water condensation, which makes the temperature of the mixture in the condenser pipeline too low, causing the crystallization of ammonium carbonate existing in the mixture, resulting in pipeline blockage. Once the blockage occurs, it is difficult to clean, and the discharge pipeline of the reaction kettle is blocked, which may cause the internal gas pressure of the reaction kettle or pipeline to rise, causing the danger of explosion. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a condenser anti-blocking system, which can prevent the condenser from being blocked, improve production efficiency and reduce safety risks.

[0005] The utility model realizes the following technical scheme:

[0006] A condenser anti-blocking system, comprising a first condenser and a temperature-adjusting water tank, a temperature-adjusting water inlet pipeline and a temperature-adjusting water return pipeline are arranged on the temperature-adjusting water tank, a refrigerant inlet of the first condenser is connected with the temperature-adjusting water inlet pipeline, a refrigerant outlet of the first condenser is connected with the temperature-adjusting water return pipeline, a water pump and a second condenser are arranged on the temperature-adjusting water inlet pipeline, and a steam condensate pipeline and a desalted water pipeline are further arranged on the temperature-adjusting water tank.

[0007] Further, a steam adjusting valve is arranged on the steam condensate pipeline, and a desalted water inlet valve is arranged on the desalted water pipeline.

[0008] Further, a first thermometer is arranged on the temperature-adjusting water tank, and a second thermometer is arranged at a temperature-adjusting water outlet of the second condenser.

[0009] Further, a pump inlet one-way valve and a pump outlet one-way valve are arranged at two ends of the water pump.

[0010] Further, the steam condensate pipeline is connected with a steam system of the production plant, and the refrigerant outlet of the second condenser and the refrigerant inlet of the second condenser are respectively communicated with a circulating water system of the production plant.

[0011] Further, the material inlet of the first condenser is communicated with the gas phase outlet of the reaction kettle, and the material outlet of the first condenser is communicated with the inlet of the gas-liquid separation tank.

[0012] Further, the gas phase outlet of the gas-liquid separation tank is communicated with the inlet of the vacuum pump through a vacuum pipeline, and the liquid phase outlet of the gas-liquid separation tank is communicated with the inlet of the reaction kettle through a material reflux pipeline.

[0013] The technical scheme of the utility model has at least the following advantages and beneficial effects:

[0014] In the utility model, the temperature adjusting water tank, the steam condensate pipeline and the desalted water pipeline cooperate to adjust the temperature of the water in the temperature adjusting water tank. The temperature adjusted temperature adjusting water is delivered to the first condenser under the cooperation of the water pump and the temperature adjusting water upper pipeline, exchanges heat with the material in the first condenser, and the temperature adjusted temperature adjusting water after heat exchange returns to the temperature adjusting water tank through the temperature adjusting water back pipeline, realizing the recycling of the temperature adjusting water. The temperature adjusting water is used to replace the circulating water to exchange heat in the first condenser, which can prevent the carbon ammonium crystallization caused by the too low temperature of the first condenser pipeline, avoid the pipeline blockage, ensure the normal operation of the system, improve the production efficiency and reduce the safety risk. The temperature adjusting water is cooled by the second condenser, that is, the circulating water is introduced into the second condenser to exchange heat with the temperature adjusting water to reduce the temperature of the temperature adjusting water, which can reduce the cold water consumption required by the temperature adjusting water tank and save the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as the limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor under the premise of the drawings.

[0016] Figure 1 The structure diagram of the condenser anti-blocking system provided for the embodiment 1 of the utility model.

[0017] Icon: 1 - first condenser, 2 - temperature control water tank, 3 - temperature control water supply line, 4 - temperature control water return line, 5 - water pump, 6 - second condenser, 7 - steam condensate line, 8 - desalted water line, 9 - steam regulating valve, 10 - desalted water inlet valve, 11 - first temperature gauge, 12 - second temperature gauge, 13 - pump inlet check valve, 14 - pump outlet check valve, 15 - steam system, 16 - circulating water system, 17 - reactor, 18 - gas-liquid separation tank, 19 - vacuum line, 20 - vacuum pump, 21 - material reflux line. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0019] Therefore, the detailed description of the embodiments of the present application provided in the drawings below is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0020] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0021] In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0022] In the description of the utility model, still need to explain, unless another explicit provision and limitation, if appear term " set " " install " " link " " connect " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication。For ordinary skilled in the art, the above-mentioned terms can be understood according to the specific meaning of the utility model.

[0023] Embodiment 1

[0024] As Figure 1 Indicated, the utility model provides a condenser anti -blocking system, including first condenser 1 and temperature -adjusting water tank 2, be provided with temperature -adjusting water up water pipeline 3 and temperature -adjusting water backwater pipeline 4 on temperature -adjusting water tank 2, the refrigerant inlet of first condenser 1 is connected with temperature -adjusting water up water pipeline 3, the refrigerant outlet of first condenser 1 is connected with temperature -adjusting water backwater pipeline 4, be provided with water pump 5 and second condenser 6 on temperature -adjusting water up water pipeline 3, temperature -adjusting water tank 2 is also provided with steam condensate pipeline 7 and desalted water pipeline 8.

[0025] Temperature -adjusting water tank 2, steam condensate pipeline 7 and desalted water pipeline 8 cooperate, can temperature -adjusting water in temperature -adjusting water tank 2.The temperature -adjusting water after temperature -adjusting is transported to first condenser 1 under the cooperation of water pump 5 and temperature -adjusting water up water pipeline 3, and carries out heat exchange with the material in first condenser 1, and the temperature -adjusting water after heat exchange returns to temperature -adjusting water tank 2 through temperature -adjusting water backwater pipeline 4, realizes the cyclic utilization of temperature -adjusting water.Due to the temperature -adjusting water has certain temperature, generally 45-55 ℃, adopts temperature -adjusting water to replace circulating water and carries out heat exchange in first condenser 1, can prevent the carbon ammonium crystallization produced by the excessively low temperature of first condenser 1 pipeline, avoids the pipe blockage, ensures the normal operation of system, improves production efficiency, reduces the security risk.And, temperature -adjusting water and material are used to carry out heat exchange, need not heat circulating water, will not increase energy consumption, no heat loss, low cost.

[0026] Because the temperature of temperature -adjusting water after heat exchange will rise, need a large amount of cold water to adjust water temperature, will make the water cost increase.Therefore, through second condenser 6, temperature -adjusting water is cooled, that is, circulating water is introduced into second condenser 6 and temperature -adjusting water is exchanged to reduce the temperature of temperature -adjusting water, which can reduce the amount of cold water required for temperature adjustment of temperature -adjusting water tank 2 and save production cost.

[0027] In the embodiment, the steam regulating valve 9 is arranged on the steam condensate pipeline 7, and the desalted water inlet valve 10 is arranged on the desalted water pipeline 8.

[0028] When the temperature of the temperature-adjusting water is too high, the temperature of the pipeline of the first condenser 1 is high, and the organic matter in the gas that needs to be exchanged will be lost, and it is difficult to form a liquid separation; when the temperature of the temperature-adjusting water is too low, the temperature of the pipeline of the first condenser 1 is low, and the carbon dioxide and ammonia water in the gas will produce carbon ammonium crystals, blocking the pipeline. By controlling the opening of the steam adjusting valve 9, the amount of steam condensate can be adjusted; by controlling the opening and closing of the desalinated water inlet valve 10, the amount of desalinated water can be adjusted; the steam adjusting valve 9 and the desalinated water inlet valve 10 cooperate to facilitate the moderate adjustment of the temperature of the temperature-adjusting water, avoiding that the temperature of the temperature-adjusting water is too high or too low.

[0029] In the embodiment, the first temperature meter 11 is arranged on the temperature-adjusting water tank 2, and the second temperature meter 12 is arranged at the temperature-adjusting water outlet of the second condenser 6. The temperature of the temperature-adjusting water in the temperature-adjusting water tank 2 can be monitored by the first temperature meter 11, and the temperature of the temperature-adjusting water at the outlet of the second condenser 6 can be monitored by the second temperature meter 12, so that the second condenser 6 can be selectively used to cool the temperature-adjusting water according to the temperature requirement of the temperature-adjusting water, and the convenience is high.

[0030] In the embodiment, the water pump 5 is provided with a pump inlet one-way valve 13 and a pump outlet one-way valve 14 at both ends. The pump inlet one-way valve 13 and the pump outlet one-way valve 14 can prevent the backflow of the temperature-adjusting water, and facilitate the control of the temperature adjustment of the temperature-adjusting water.

[0031] In the embodiment, the steam condensate pipeline 7 is connected with the steam system 15 of the production workshop, and the refrigerant outlet of the second condenser 6 and the refrigerant inlet of the second condenser 6 are respectively communicated with the circulating water system 16 of the production workshop. The steam and the circulating water are both from the production workshop, so that the steam and the circulating water in the production process are recycled, further saving the cost.

[0032] In the embodiment, the material inlet of the first condenser 1 is communicated with the gas phase outlet of the reaction kettle 17, and the material outlet of the first condenser 1 is communicated with the inlet of the gas-liquid separation tank 18. The gas mixture from the reaction kettle 17 enters the first condenser 1, and exchanges heat with the temperature-adjusting water in the first condenser 1. The gas mixture can be separated into gas and liquid in the gas-liquid separation tank 18 in the heat exchange process.

[0033] In the embodiment, the gas phase outlet of the gas-liquid separation tank 18 is communicated with the inlet of the vacuum pump 20 through the vacuum pipeline 19, and the liquid phase outlet of the gas-liquid separation tank 18 is communicated with the inlet of the reaction kettle 17 through the material reflux pipeline 21. The gas (mainly ammonia) in the gas-liquid separation tank 18 is vacuumized by the vacuum pump 20, so that the ammonia can be recycled, and the ammonia in the reaction kettle 17 can be removed, thereby improving the product quality in the reaction kettle 17. The liquid in the gas-liquid separation tank 18 is sent back to the reaction kettle 17 through the material reflux pipeline 21, so that the liquid can continue to participate in the reaction in the reaction kettle 17, and the utilization rate of the material can be improved.

[0034] The working principle of the condenser anti-blocking system is as follows:

[0035] The steam regulating valve 9 and the desalted water inlet valve 10 are opened, so that the steam condensate and the desalted water are tempered in the temperature adjusting water tank 2. The temperature of the tempered water is observed according to the first thermometer 11, and the steam regulating valve 9 and the desalted water inlet valve 10 are closed after being adjusted to the appropriate temperature.

[0036] The pump inlet one-way valve 13 and the pump outlet one-way valve 14 are opened, and the water pump 5 is started. The tempered water is transported into the first condenser 1 through the tempered water upper pipeline 3 by the water pump 5 for heat exchange. The tempered water after heat exchange is sent back to the temperature adjusting water tank 2 through the tempered water back pipeline 4. The gas mixture in the reaction kettle 17 enters the first condenser 1 to exchange heat with the tempered water, and then enters the gas-liquid separation tank 18 for gas-liquid separation. The gas in the gas-liquid separation tank 18 is pumped out by the vacuum pump 20, and the liquid in the gas-liquid separation tank 18 is sent back to the reaction kettle 17 through the material reflux pipeline 21.

[0037] When the first thermometer 11 detects that the temperature of the tempered water in the temperature adjusting water tank 2 is high, the water pump 5 transports the tempered water into the second condenser 6 for heat exchange and cooling (that is, the circulating water of the circulating water system 16 is introduced into the second condenser 6), and then the cooled tempered water enters the first condenser 1 for heat exchange.

[0038] The above is only a preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A condenser anti-clogging system, characterized in that: It includes a first condenser and a temperature-regulating water tank. The temperature-regulating water tank is equipped with a temperature-regulating water supply pipeline and a temperature-regulating water return pipeline. The refrigerant inlet of the first condenser is connected to the temperature-regulating water supply pipeline, and the refrigerant outlet of the first condenser is connected to the temperature-regulating water return pipeline. A water pump and a second condenser are installed on the temperature-regulating water supply pipeline. The temperature-regulating water tank is also equipped with a steam condensate pipeline and a demineralized water pipeline.

2. The condenser anti-clogging system according to claim 1, characterized in that, A steam regulating valve is installed on the steam condensate pipeline, and a demineralized water inlet valve is installed on the demineralized water pipeline.

3. The condenser anti-clogging system according to claim 1, characterized in that, A first thermometer is installed on the temperature-regulating water tank, and a second thermometer is installed at the temperature-regulating water outlet of the second condenser.

4. The condenser anti-clogging system according to claim 1, characterized in that, The water pump is equipped with a pump inlet check valve and a pump outlet check valve at both ends.

5. The condenser anti-clogging system according to claim 1, characterized in that, The steam condensate pipeline is connected to the steam system of the production workshop, and the refrigerant outlet of the second condenser and the refrigerant inlet of the second condenser are respectively connected to the circulating water system of the production workshop.

6. The condenser anti-clogging system according to any one of claims 1-5, characterized in that, The material inlet of the first condenser is connected to the gas phase outlet of the reactor, and the material outlet of the first condenser is connected to the inlet of the gas-liquid separator.

7. The condenser anti-clogging system according to claim 6, characterized in that, The gas phase outlet of the gas-liquid separator is connected to the vacuum pump inlet via a vacuum pipeline, and the liquid phase outlet of the gas-liquid separator is connected to the reactor inlet via a material return pipeline.

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