Condensate closed-loop cyclic utilization system for coke oven production

Abstract

The utility model provides a condensate closed-loop cyclic utilization system for coke oven production, comprising: a steam condensation assembly of which a steam inlet is communicated with a steam outlet of a coke oven and which is used for condensing steam generated in the production process of the coke oven; a water inlet of the first soft water collecting box is communicated with a condensate outlet of the steam condensation assembly through a first pipeline, and the first soft water collecting box is communicated with a water inlet of the coke oven through a second pipeline; the second soft water collecting box is communicated with the first soft water collecting box through a third pipeline; and a water inlet of the plant to-be-used water device is communicated with the second soft water collecting box through a fourth pipeline, and a steam outlet in the plant to-be-used water device is communicated with the steam condensing assembly through a first steam pipeline. According to the invention, waste of water sources caused by direct discharge of the condensate is avoided, recycling of the condensate for coke oven production is realized, and the utilization efficiency of the condensate is improved.

Description

Technical Field

[0001] This application relates to the field of coke oven production technology, and in particular to a closed-loop recycling system for condensate used in coke oven production. Background Technology

[0002] During coke oven production, a large amount of condensate is generated. This condensate can be divided into direct condensate and indirect condensate. Direct condensate is the condensate that comes into direct contact with the materials (examples include gas pipe condensate and final cooling water from coke oven gas). It contains high concentrations of pollutants such as COD, ammonia nitrogen, cyanide, and volatile phenols. Indirect condensate, on the other hand, is the condensate that does not come into contact with pollutants (examples include indirect cooling water from equipment during the distillation of coke oven gas and chemical products, and indirect steam condensate). These do not come into direct contact with the materials and are therefore uncontaminated. Their main component is ordinary water formed by the condensation of steam and does not contain harmful substances such as phenols, cyanide, and ammonia nitrogen. This is considered "clean wastewater," and its water quality meets the requirements for reuse.

[0003] Traditional methods for treating coke oven condensate often involve direct discharge or simple treatment before discharge. This not only results in severe environmental pollution from high concentrations of pollutants such as COD, ammonia nitrogen, cyanide, and volatile phenols in the direct condensate, but also wastes water resources for the indirect condensate. Furthermore, with increasingly stringent environmental regulations and companies' focus on sustainable development, the effective recovery and recycling of coke oven condensate has become an urgent problem. Therefore, to avoid water waste, this application proposes a closed-loop recycling system for coke oven condensate used in indirect condensate. Utility Model Content

[0004] This application provides a closed-loop recycling system for condensate used in coke oven production to solve the technical problems described in the background section.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0006] This application provides a closed-loop recycling system for condensate used in coke oven production, comprising:

[0007] A steam condensing assembly, wherein the steam inlet of the steam condensing assembly is connected to the steam outlet of the coke oven, and is used to condense the steam generated by the coke oven during the production process;

[0008] The first soft water collection tank has its inlet connected to the condensate outlet of the steam condensation assembly via a first pipe, and its outlet connected to the coke oven's inlet via a second pipe.

[0009] The second soft water collection tank is connected to the first soft water collection tank via a third pipe;

[0010] The water supply equipment in the factory area has its inlet connected to the second soft water collection tank via a fourth pipe, and its steam outlet is connected to the steam condensation assembly via a first steam pipe.

[0011] Optionally, there are multiple steam condensation components, and each of the multiple steam condensation components includes a second steam pipe and a condenser;

[0012] One end of each of the multiple second steam pipes is connected to multiple steam outlets on the coke oven, and the other end is connected to the steam inlet of the condenser. One of the condenser's condensate outlets is connected to the end of the first pipe away from the first soft water collection tank, and the condensate outlets of the remaining condensers are all connected to the first pipe through a fifth pipe.

[0013] Optionally, a first water pump and a first metering valve are sequentially installed on the first pipe near the first soft water collection tank.

[0014] Optionally, a second water pump and a second metering valve are sequentially installed on the pipe body near the coke oven of the second pipe.

[0015] Optionally, a third water pump and a third metering valve are sequentially installed on the fourth pipe near the water-using equipment in the factory area.

[0016] Optionally, an air pump is installed on the first steam pipe.

[0017] Optionally, the first pipe, the second pipe, the third pipe, the fourth pipe, the fifth pipe, the first steam pipe, and the second steam pipe are all made of stainless steel C04.

[0018] Optionally, both the first soft water collection tank and the second soft water collection tank are equipped with a liquid level sensor.

[0019] The closed-loop recycling system for condensate used in coke oven production provided in this application condenses the steam generated during the coke oven production process using a steam condensing assembly to obtain condensate (here, condensate refers to indirect condensate). The condensate is collected in a first soft water collection tank via a first pipeline and stored there. A portion of the condensate collected in the first soft water collection tank enters the coke oven via a second pipeline and is reused as production water. Another portion of the condensate in the first soft water collection tank enters a second soft water collection tank via a third pipeline and supplies water to waiting-to-use equipment in the plant area (wherein, waiting-to-use equipment in the plant area can be a boiler). The steam generated during the operation of waiting-to-use equipment in the plant area enters the steam condensing assembly via a first steam pipeline to condense and obtain condensate, which is then supplied to the coke oven and waiting-to-use equipment in the plant area for reuse. This achieves closed-loop recycling of condensate used in coke oven production, avoids waste of condensate, and improves the utilization efficiency of condensate. Compared with the prior art, this application avoids the waste of water resources caused by direct discharge of condensate, and uses condensate for coke oven production and other equipment waiting for water in the plant area, realizing the reuse of condensate for coke oven production, improving the utilization efficiency of condensate, and thus reducing the water burden of coke ovens and equipment waiting for water in the plant area. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A flowchart of a closed-loop recycling system for condensate from coke oven production provided in an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of a closed-loop recycling system for condensate in coke oven production provided in an embodiment of this application;

[0023] Figure 3 This is a schematic diagram showing the electrical connections between the control device and its components according to an embodiment of this application.

[0024] Among them: 100, steam condensing assembly; 101, second steam pipeline; 102, condenser; 200, coke oven; 201, first pipeline; 2011, first water pump; 2012, first metering valve; 202, second pipeline; 2021, second water pump; 2022, second metering valve; 203, third pipeline; 204, fourth pipeline; 2041, third water pump; 2042, third metering valve; 205, fifth pipeline; 300, first soft water collection tank; 400, second soft water collection tank; 500, equipment for waiting for water use in the plant area; 501, first steam pipeline; 5011, air pump; 600, control device; 700, liquid level sensor. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0026] Traditional methods for treating coke oven condensate often involve direct discharge or simple treatment before discharge. This not only causes serious environmental pollution due to high concentrations of pollutants such as COD, ammonia nitrogen, cyanide, and volatile phenols in the direct condensate, but also wastes water resources for the indirect condensate. Furthermore, with increasingly stringent environmental regulations and companies' focus on sustainable development, the effective recovery and recycling of coke oven condensate has become an urgent problem. Therefore, to avoid water waste, this application proposes a closed-loop recycling system for coke oven condensate.

[0027] refer to Figures 1 to 3 This application provides a closed-loop recycling system for condensate used in coke oven production, comprising:

[0028] The steam condensing assembly 100 has a steam inlet connected to the steam outlet of the coke oven 200, and is used to condense the steam generated by the coke oven 200 during the production process. The steam outlet of the coke oven 200 refers to the steam outlet used to discharge indirect steam, which can be the steam outlet of each piece of equipment in the methanation process, depending on the actual production situation of the coke oven 200. This application does not make a specific limitation on it.

[0029] The first soft water collection tank 300 has its inlet connected to the condensate outlet of the steam condensation component 100 via a first pipe 201, and is connected to the inlet of the coke oven 200 via a second pipe 202. The first soft water collection tank 300 is used to collect and store the condensate generated during the coke oven 200 production process. The condensate in this application refers to indirect condensate (i.e., condensate that does not contain harmful substances such as phenol, cyanide, and ammonia nitrogen, and is considered "clean wastewater" whose water quality meets the requirements for reuse). The condensate in the first soft water collection tank 300 is introduced into the inlet of the coke oven 200 through the second pipe 202. (The inlet of the coke oven 200 can be the ammonia water circulation system of the coke oven 200, used for spraying and cooling the ammonia water circulation system, or it can be used for other sections. The specific settings can be determined according to the actual situation, and this application does not specifically limit it.)

[0030] The second soft water collection tank 400 is connected to the first soft water collection tank 300 via the third pipe 203. The dimensions of the first soft water collection tank 300 and the second soft water collection tank 400 can be set according to actual needs, and this application does not impose specific limitations on them.

[0031] The plant area has a water-retaining device 500. The inlet of the water-retaining device 500 is connected to the second soft water collection tank 400 through the fourth pipe 204, and the steam outlet of the device is connected to the steam condensing component 100 through the first steam pipe 501. Part of the condensate in the first soft water collection tank 300 is used for the production water of the coke oven 200, and the other part enters the second soft water collection tank 400 for storage and is used for the plant area water-retaining device 500 (the plant area water-retaining device 500 can be a boiler or other water-using equipment, which can be set according to actual needs, and this application does not specifically limit it). The second soft water collection tank 400 is set up to ensure the continuity of the water use process of the plant area water-retaining device 500.

[0032] The closed-loop recycling system for condensate in coke oven production provided in this application condenses the steam generated by the coke oven 200 during production using a steam condensation assembly 100 to obtain condensate (here, condensate refers to indirect condensate). The condensate is collected via a first pipe 201 into a first soft water collection tank 300 and stored there. A portion of the condensate collected in the first soft water collection tank 300 enters the coke oven 200 via a second pipe 202 and is reused as production water for the coke oven 200. The remaining portion of the condensate in the first soft water collection tank 300 is recycled via a third pipe 202. Pipeline 203 enters the second soft water collection tank 400, and through the second soft water collection tank 400, water is supplied to the plant's waiting-for-water equipment 500 (wherein, the waiting-for-water equipment 500 can be a boiler). The water vapor generated by the waiting-for-water equipment 500 during operation enters the steam condensing assembly 100 through the first steam pipe 501 for condensation, and the condensate is then supplied to the coke oven 200 and the waiting-for-water equipment 500 for reuse. This achieves closed-loop recycling of condensate used in coke oven production, avoiding waste of condensate and improving condensate utilization efficiency. Compared with existing technologies, this application avoids the waste of water resources caused by direct discharge of condensate, and reuses the condensate in coke oven 200 production and the waiting-for-water equipment 500, achieving the reuse of condensate used in coke oven 200 production, improving condensate utilization efficiency, and thus reducing the water burden on coke oven 200 and the waiting-for-water equipment 500.

[0033] Optionally, the system of this application also includes a control device 600, which is used to control the entire process of the closed-loop recycling system for condensate from coke oven production. The control device 600 can be a control device with an integrated controller located in the central control room of the plant (the specific structure can be found in existing control devices installed in the plant area; the specific configuration can be determined according to actual conditions, and this application does not further limit the specific specifications or model of the control device 600). Specifically, it is used to control the processes of steam condensation, condensate collection, and reuse in the closed-loop recycling system for condensate from coke oven production, making the entire process of the closed-loop recycling system for condensate from coke oven production more convenient and precise to operate, thereby improving the efficiency of the closed-loop recycling of condensate from coke oven production.

[0034] In some embodiments, reference Figure 2In this application, there are multiple steam condensing components 100, each of which includes a second steam pipe 101 and a condenser 102. Since the coke oven 200 produces indirect condensate in more than one section, that is, multiple equipment corresponding to multiple sections in the coke oven 200 production process will produce indirect condensate. In order to effectively collect the indirect condensate produced by multiple equipment in multiple sections, multiple steam condensing components 100 are provided. The number of steam condensing components 100 can be set according to the number of equipment that produces indirect condensate in the coke oven 200 production process, and this application does not make a specific limitation on it.

[0035] Specifically, one end of each of the multiple second steam pipes 101 is connected to multiple steam outlets on the coke oven 200, and the other end is connected to the steam inlet of the condenser 102. The condensate outlet of one of the condensers 102 is connected to the end of the first pipe 201 away from the first soft water collection tank 300. The condensate outlets of the remaining condensers 102 are all connected to the first pipe 201 through the fifth pipe 205.

[0036] During the coke oven 200 production process, multiple steam outlets on the coke oven 200 enter the condenser 102 corresponding to each of the multiple second steam pipes 101. After condensation by the condenser 102, condensate is obtained. The condensate from one of the condensers 102 enters the first soft water collection tank 300 through the first pipe 201, while the condensate from the other condensers 102 enters the first soft water collection tank 300 through the corresponding fifth pipe 205 and the first pipe 201. This achieves the collection of condensate from each steam outlet during the coke oven 200 production process, realizing the synchronous collection of condensate from multiple steam outlets during the coke oven 200 production process and improving the condensate collection efficiency during the coke oven 200 production process.

[0037] In some embodiments, reference Figure 2 In this application, a first water pump 2011 and a first metering valve 2012 are sequentially installed on the first pipe 201 near the first soft water collection tank 300; wherein, the specifications and models of the first water pump 2011 and the first metering valve 2012 can be set according to actual needs, and this application does not specifically limit them.

[0038] The first water pump 2011 and the first metering valve 2012 are both electrically connected to the control device 600.

[0039] In the above embodiment, the first water pump 2011 provides the power for the condensate from the condenser 102 to enter the first soft water collection tank 300 through the first pipe 201, and the first metering valve 2012 measures the flow rate of the condensate flowing through the first pipe 201, making it easy to control the amount of condensate entering the first soft water collection tank 300. Furthermore, the control device 600 controls the first water pump 2011 and the first metering valve 2012 during the above process, avoiding manual operation and improving the operating efficiency of the first water pump 2011 and the first metering valve 2012.

[0040] In some embodiments, reference Figure 2 In this application, a second water pump 2021 and a second metering valve 2022 are sequentially installed on the pipe body of the second pipe 202 near the coke oven 200; wherein, the specifications and models of the second water pump 2021 and the second metering valve 2022 can be set according to actual needs, and this application does not specifically limit them.

[0041] The second water pump 2021 and the second metering valve 2022 are both electrically connected to the control device 600.

[0042] In the above embodiment, the second water pump 2021 provides the power for the condensate in the first soft water collection tank 300 to enter the coke oven 200 through the second pipe 202, and the second metering valve 2022 measures the flow rate of the condensate flowing through the second pipe 202, making it easy to control the amount of condensate entering the coke oven 200. Furthermore, the control device 600 controls the second water pump 2021 and the second metering valve 2022 during the above process, avoiding manual operation and improving the operating efficiency of the second water pump 2021 and the second metering valve 2022.

[0043] In some embodiments, reference Figure 2 In this application, the fourth pipe 204 is equipped with a third water pump 2041 and a third metering valve 2042 in sequence on the pipe body near the water-using equipment 500 in the plant area; the specifications and models of the third water pump 2041 and the third metering valve 2042 can be set according to actual needs, and this application does not make specific limitations on them.

[0044] The third water pump 2041 and the third metering valve 2042 are both electrically connected to the control device 600.

[0045] In the above embodiment, the third water pump 2041 provides the power for the condensate in the second soft water collection tank 300 to enter the water-receiving equipment 500 in the plant area through the fourth pipe 204. The third metering valve 2042 measures the flow rate of the condensate entering the water-receiving equipment 500 through the fourth pipe 204, facilitating the control of the amount of condensate entering the equipment. Furthermore, the control device 600 controls the third water pump 2041 and the third metering valve 2042 during this process, avoiding manual operation and improving their operational efficiency.

[0046] In some embodiments, reference Figure 2 In this application, a gas pump 5011 electrically connected to the control device 600 is installed on the first steam pipe 501. The specifications and model of the gas pump 5011 can be set according to actual needs, and this application does not impose specific limitations on it.

[0047] In the above embodiments, the air pump 5011 is turned on or off by the control device 600, and the air pump 5011 provides the power for the water vapor from the water-using equipment 500 in the plant to enter the steam condensation assembly 100.

[0048] In some embodiments, the first pipe 201, second pipe 202, third pipe 203, fourth pipe 204, fifth pipe 205, first steam pipe 501, and second steam pipe 101 in this application are all made of stainless steel C04. Stainless steel C04 (00Cr14Ni14Si4) is an ultra-low carbon, high-silicon austenitic stainless steel with excellent corrosion resistance, mechanical properties, stress corrosion resistance, and environmental safety. Therefore, using stainless steel C04 improves the service life and reliability of the first pipe 201, second pipe 202, third pipe 203, fourth pipe 204, fifth pipe 205, first steam pipe 501, and second steam pipe 101, and also reduces maintenance costs, thereby improving the overall efficiency and safety of the closed-loop recycling system for condensate in coke oven production.

[0049] In some embodiments, reference Figure 3 In this application, both the first soft water collection tank 300 and the second soft water collection tank 400 are equipped with a liquid level sensor 700 that is electrically connected to the control device 600. The specifications and model of the liquid level sensor 700 can be set according to actual needs, and this application does not impose specific limitations on it.

[0050] In the above embodiments, a level sensor 700 installed in the first soft water collection tank 300 detects the level of condensate in the first soft water collection tank 300, facilitating the monitoring of condensate collection. Similarly, a level sensor 700 installed in the second soft water collection tank 400 detects the level of condensate in the second soft water collection tank 400, also facilitating monitoring of condensate collection. The level sensors 700 transmit the detected level signals from both the first and second soft water collection tanks 300 to the control device 600. The control device 600 then controls the operation of the first water pump 2011, the first metering valve 2012, the second water pump 2021, the second metering valve 2022, the third water pump 2041, and the third metering valve 2042, improving the ease of operation of the closed-loop recycling system for condensate from coke oven production.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A condensate closed-circuit recycling system for coke oven production, characterized in that, include: A steam condensing assembly (100) is provided, wherein the steam inlet of the steam condensing assembly (100) is connected to the steam outlet of the coke oven (200) and is used to condense the steam generated by the coke oven (200) during the production process. The first soft water collection tank (300) has its inlet connected to the condensate outlet of the steam condensation assembly (100) via a first pipe (201), and is connected to the inlet of the coke oven (200) via a second pipe (202). The second soft water collection tank (400) is connected to the first soft water collection tank (300) via a third pipe (203); The water supply equipment (500) in the factory area has its inlet connected to the second soft water collection tank (400) through the fourth pipe (204), and its steam outlet is connected to the steam condensing component (100) through the first steam pipe (501).

2. The condensate closed cycle utilization system for coke oven production according to claim 1, characterized in that, There are multiple steam condensing assemblies (100), and each of the multiple steam condensing assemblies (100) includes a second steam pipe (101) and a condenser (102). One end of each of the multiple second steam pipes (101) is connected to a multiple steam outlet on the coke oven (200), and the other end is connected to the steam inlet of the condenser (102). The condensate outlet of one of the condensers (102) is connected to the end of the first pipe (201) away from the first soft water collection tank (300). The condensate outlets of the remaining condensers (102) are all connected to the first pipe (201) through the fifth pipe (205).

3. The condensate closed cycle utilization system for coke oven production according to claim 1, characterized in that, The first water pump (2011) and the first metering valve (2012) are sequentially installed on the pipe body of the first pipe (201) near the first soft water collection tank (300).

4. The condensate closed cycle utilization system for coke oven production according to claim 1, characterized in that, The second pipe (202) is equipped with a second water pump (2021) and a second metering valve (2022) in sequence on the pipe body near the coke oven (200).

5. The condensate closed cycle utilization system for coke oven production according to claim 1, characterized in that, The fourth pipe (204) is equipped with a third water pump (2041) and a third metering valve (2042) in sequence on the pipe body near the water-receiving equipment (500) in the plant area.

6. The condensate closed cycle utilization system for coke oven production according to claim 1, characterized in that, An air pump (5011) is installed on the first steam pipe (501).

7. The condensate closed cycle utilization system for coke oven production according to claim 2, characterized in that, The first pipe (201), the second pipe (202), the third pipe (203), the fourth pipe (204), the fifth pipe (205), the first steam pipe (501), and the second steam pipe (101) are all made of stainless steel C04.

8. The condensate closed loop recycling system for coke oven production according to any one of claims 1 to 6, characterized in that, Both the first soft water collection tank (300) and the second soft water collection tank (400) are equipped with liquid level sensors (700).

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