Efficient energy-saving heating system for producing basic copper chloride

Abstract

The utility model discloses an efficient energy-saving heating system for producing basic copper chloride, which comprises a steam pipe, an ammonia-nitrogen wastewater feeding pipe, an ammonia-nitrogen wastewater discharging pipe, a copper-containing waste liquid feeding pipe, a copper-containing waste liquid discharging pipe, a heat exchanger, a condensate water system and a washing water system. According to the system, heat energy in the production process of basic copper chloride can be greatly utilized, heat is circulated in the system, the whole system is low in noise, and good economic benefits and environmental protection benefits are achieved.

Description

Technical Field

[0001] This application relates to the field of energy-saving technology in production, and specifically to a high-efficiency energy-saving heating system for the production of basic copper chloride. Background Technology

[0002] The PCB manufacturing industry has driven my country's rapid economic development, but the resulting acid and alkali etching wastewater has also posed a serious threat to the environment. Therefore, the rational and effective recycling and harmless treatment of acid and alkali etching wastewater is imperative. Basic copper chloride is currently one of the important products for the resource utilization of acid and alkali etching wastewater. In related technologies, workers typically neutralize acidic and alkaline etching wastewater to produce basic copper chloride. The resulting ammonia nitrogen wastewater is then concentrated and crystallized before being sold as agricultural ammonium chloride salt.

[0003] Currently, the heating methods for producing basic copper chloride are essentially as follows: The first method involves direct steam flow into the reactor to heat the mixed reaction system of acid-base etching waste to the required reaction temperature of 70-90°C. However, this method suffers from drawbacks such as low steam energy efficiency and high noise levels around the reactor. In particular, the steam condensate, being ammonia nitrogen wastewater, increases subsequent treatment costs. The second method involves embedding coils within the reactor. This method avoids the treatment costs of steam condensate, but over time, the accumulation of basic copper chloride on the coils leads to uneven heating, affecting the quality of the basic copper chloride. The ammonia nitrogen wastewater generated by both methods, after copper removal, enters the resin adsorption for deep copper removal. However, the temperature of this ammonia nitrogen wastewater is high, reaching 55-60°C. This not only wastes residual heat but also reduces the resin's adsorption efficiency for copper ions. Utility Model Content

[0004] This application addresses the shortcomings of existing technologies by providing a high-efficiency and energy-saving heating system for the production of basic copper chloride.

[0005] This application provides a high-efficiency and energy-saving heating system for basic copper chloride, comprising:

[0006] Steam pipes, steam heat exchangers, ammonia nitrogen wastewater heat exchangers, ammonia nitrogen wastewater inlet pipes, ammonia nitrogen wastewater outlet pipes, copper-containing wastewater inlet pipes, copper-containing wastewater outlet pipes, washing water systems, and condensate systems;

[0007] The steam pipe is connected to the steam shut-off valve, pressure reducing valve, pressure gauge, electric regulating valve, and steam heat exchanger.

[0008] The steam heat exchanger is connected to the steam pipe, condensate system, ammonia nitrogen wastewater heat exchanger, and copper-containing waste liquid discharge pipe.

[0009] The ammonia nitrogen wastewater heat exchanger is connected to the steam heat exchanger, the ammonia nitrogen wastewater inlet pipe, the ammonia nitrogen wastewater outlet pipe, and the copper-containing waste liquid inlet pipe.

[0010] The ammonia nitrogen wastewater inlet pipe is connected to the ammonia nitrogen wastewater heat exchanger;

[0011] The ammonia nitrogen wastewater discharge pipe is connected to the ammonia nitrogen wastewater heat exchanger.

[0012] The copper-containing waste liquid feed pipe is connected to the ammonia nitrogen wastewater heat exchanger;

[0013] The copper-containing waste liquid discharge pipe is connected to a steam heat exchanger, and a temperature sensor is installed on the copper-containing waste liquid discharge pipe.

[0014] The washing system connects the ammonia nitrogen wastewater heat exchanger, the steam heat exchanger, and the product rinsing pipe;

[0015] The condensate system connects the steam heat exchanger and the condensate tank. The condensate system includes a steam trap and a bypass.

[0016] Preferably, a high-efficiency and energy-saving heating system for the production of basic copper chloride includes an ammonia nitrogen wastewater heat exchanger and a steam heat exchanger.

[0017] The ammonia nitrogen wastewater heat exchanger is a plate and frame heat exchanger made of TAI1 material. Its feed hot side is ammonia nitrogen wastewater from the production of alkali copper, with a temperature of 55~60℃. The copper-containing wastewater is heated for the first time through heat exchange between the ammonia nitrogen wastewater and the copper-containing waste liquid.

[0018] The steam heat exchanger is a plate and frame heat exchanger made of TAI1 material. Its feed hot side is steam with a feed temperature of about 130℃. The copper-containing waste liquid is heated a second time by exchanging heat with the ammonia nitrogen wastewater through steam.

[0019] Preferably, the steam condensate generated by the steam heat exchanger is stored in a condensate tank at a temperature of 90~100℃ and used as flushing water for the heat exchanger to reduce the failure rate. It can also be used as washing water for basic copper chloride products.

[0020] Preferably, the final temperature of the copper-containing waste liquid output by the high-efficiency and energy-saving heating system for the production of basic copper chloride can be automatically controlled by the coordinated action of the temperature sensor of the steam heat exchanger and the electric regulating valve, and the automatically controlled temperature is between 90 and 100°C.

[0021] Preferably, the copper-containing waste liquid in the high-efficiency and energy-saving heating system of basic copper chloride is an acidic etching waste liquid.

[0022] Preferably, the heat exchangers of a high-efficiency and energy-saving heating system for producing basic copper chloride are equipped with a bypass and a flushing bypass. The flushing bypass is used for the daily maintenance of the heat exchangers, and the bypass is used to ensure the normal operation of the system when the heat exchangers are under maintenance.

[0023] Due to the application of the above technical solution, this application has the following advantages compared with the prior art:

[0024] The high-efficiency and energy-saving heating system for the production of basic copper chloride disclosed in this application can recover the waste heat of ammonia nitrogen wastewater in the production process by using a heat exchanger, thereby realizing the recycling of heat energy within the system. On the one hand, it saves the steam required for heating, and on the other hand, it reduces the adsorption temperature of ammonia nitrogen wastewater resin and improves the adsorption effect.

[0025] The entire heating process of the high-efficiency and energy-saving heating system for the production of basic copper chloride in this application can be automatically controlled by a copper-containing waste liquid discharge temperature sensor in conjunction with a steam electric regulating valve. This reduces the complexity of manual operation and the noise around the basic copper chloride reactor, resulting in significant environmental benefits.

[0026] The steam condensate in the high-efficiency and energy-saving heating system produced by the basic copper chloride process of this application can be used for product cleaning and system maintenance within the system. This helps reduce the failure rate of heat exchangers, ensures the normal operation of the system, and the hot water washing of products has a better washing and dehydration effect compared to cold water. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application. The same reference numerals in the drawings identify the same or similar parts or components. Those skilled in the art should understand that the drawings are not drawn to scale.

[0028] Figure 1 This is a schematic diagram of a high-efficiency and energy-saving heating system for basic copper chloride.

[0029] Explanation of reference numerals in the attached diagram: 1-Steam pipe; 2-Pressure reducing valve; 3-Pressure gauge; 4-Electric regulating valve; 5-Steam heat exchanger; 6-Temperature sensor; 7-Ammonia nitrogen wastewater heat exchanger; 8-Acid water side flushing valve; 9-Ammonia nitrogen wastewater side flushing valve; 10-Ammonia nitrogen wastewater flow meter; 11-Ammonia nitrogen wastewater storage tank; 12-Condensate system; 13-Washing water system; 14-Ammonia nitrogen wastewater inlet pipe; 15-Copper-containing waste liquid inlet pipe; 16-Ammonia nitrogen wastewater outlet pipe; 17-Copper-containing waste liquid outlet pipe. Detailed Implementation

[0030] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] In the description of this application, it should be noted that the terms "all around," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "connection" and "towards" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] This application discloses a high-efficiency and energy-saving heating system for the production of basic copper chloride, such as... Figure 1 As shown, it includes: steam pipe 1, ammonia nitrogen wastewater inlet pipe 14, ammonia nitrogen wastewater outlet pipe 16, copper-containing waste liquid inlet pipe 15, copper-containing waste liquid outlet pipe 17, heat exchangers 5 and 7, condensate system 12, and washing water system 13.

[0033] This application provides a high-efficiency and energy-saving heating system for the production of basic copper chloride, which also includes valve components and a material pump.

[0034] The heat exchanger for ammonia nitrogen wastewater is a plate and frame heat exchanger, and the main heat exchange plates are TAI1.

[0035] The condensate from the steam heat exchanger can be used for backwashing the heat exchanger and for washing products.

[0036] In addition, this application provides a high-efficiency and energy-saving heating system for the production of basic copper chloride, including start-up procedures and system maintenance procedures:

[0037] The start-up steps of a high-efficiency and energy-saving heating system for the production of basic copper chloride provided in this application include:

[0038] S1: Open the valve for the material entering the reactor at the back end, close the heat exchanger washing water valve and its bypass valve, the bypass of the condensate system 12, and open the other pump front valves, copper-containing waste liquid (ammonia nitrogen wastewater) inlet and outlet valves, steam regulating valve, and condensate system 12 drain valve.

[0039] S2: Adjust the pressure reducing valve 2 to make the pressure gauge reading 0.2MPa, thereby ensuring that the steam temperature entering the steam heat exchanger 7 is about 130℃, and ensuring that the heat exchanger sealing strip is not damaged due to high temperature;

[0040] S3: Set the outlet temperature of steam heat exchanger 7 to 90~100℃;

[0041] S4: Start the ammonia nitrogen wastewater feed pump and the copper-containing wastewater feed pump in sequence;

[0042] S5: The flow rate of ammonia nitrogen wastewater is controlled to be 2 to 3 times that of copper-containing waste liquid by the outlet valve of ammonia nitrogen wastewater heat exchanger 7. The flow rate depends on the ratio of the produced ammonia nitrogen wastewater to the consumed copper-containing waste liquid. The acid water is heated in the ammonia nitrogen wastewater heat exchanger 7 as the first step.

[0043] S6: In the steam heat exchanger 5, the opening of the electric regulating valve 4 is controlled by the temperature sensor 6 of the copper-containing waste liquid at the outlet, so as to achieve an outlet temperature of 90~100℃, thereby realizing the second step of heating the acid water.

[0044] S7: The steam condensate generated by steam heat exchanger 5 enters the condensate tank for washing basic copper chloride products.

[0045] The maintenance steps in a high-efficiency energy-saving heating system for the production of basic copper chloride provided in this application include:

[0046] S1: Close the steam regulating valve, copper-containing wastewater and ammonia nitrogen wastewater feed pumps and related pump port valves in sequence;

[0047] S2: After the shutdown process is completed, close the product washing water valve and open the main washing water valve;

[0048] S3: Close the acid water inlet and outlet valves of the ammonia nitrogen wastewater heat exchanger, open the bypass valve, close the valve before the copper-containing wastewater feed pump, open the valve for flushing the intermediate tank containing copper waste liquid (not shown in the figure), close the washing water valve of the ammonia nitrogen wastewater heat exchanger 7, close the acid water side feed valve of the steam heat exchanger, then open the acid water side washing water valve, and start the washing water pump for cleaning.

[0049] S4: Close the acid water inlet and outlet valves of steam heat exchanger 5, open the bypass valve, open the inlet and outlet valves of ammonia nitrogen wastewater heat exchanger 7, close the bypass valve and the acid water side feed valve of ammonia nitrogen wastewater heat exchanger 7, then open the acid water side wash water valve of ammonia nitrogen wastewater heat exchanger 7 and start the pump for cleaning.

[0050] S5: Close the acid water side wash valve of ammonia nitrogen wastewater heat exchanger 7, open the ammonia nitrogen wastewater side wash valve, open the ammonia nitrogen wastewater side outlet valve, close the ammonia nitrogen wastewater inlet valve and bypass valve, start the pump for cleaning, and the cleaning water enters the ammonia nitrogen wastewater storage tank 11.

[0051] The energy-saving heating process of this application consists of an ammonia nitrogen wastewater heater 7 and a steam heater 5 forming a two-stage heating system. This system heats the copper-containing waste liquid that newly enters the system in a combined manner, while simultaneously cooling the ammonia nitrogen wastewater that has passed through the system. The steam condensate continuously generated by the steam heat exchanger 5 during the heat exchange process can be used as washing water for basic copper chloride products.

[0052] For example, the copper-containing waste liquid entering this energy-saving heating system is at a temperature of 20°C. It first enters the ammonia-nitrogen wastewater heat exchanger 7 to exchange heat with the ammonia-nitrogen wastewater (55~60°C) generated from basic copper chloride production, undergoing a first heating process. After the exchange, the temperature of the copper-containing waste liquid is 50°C, and after cooling, the temperature is 30°C. Subsequently, the 50°C copper-containing waste liquid enters the steam heat exchanger 5 for a second heating process, exchanging heat with 130°C steam to raise the temperature to 90°C. The 90°C hot material is then mixed in a proportional manner with the alkaline etching waste liquid (50~60°C) to achieve the temperature conditions (60~90°C) required for basic copper chloride production. The condensate produced by the steam heat exchanger 5 during this process can be used for cleaning the basic copper chloride products and for system maintenance during shutdown.

[0053] The above embodiments are only for illustrating the technical concept and features of this application. Their purpose is to enable those skilled in the art to understand the content of this application and implement it accordingly. They should not be used to limit the scope of protection of this application. All equivalent changes or modifications made in accordance with the spirit and essence of this application should be included within the scope of protection of this application.

Claims

1. A high-efficiency and energy-saving heating system for the production of basic copper chloride, characterized in that, include: Steam pipes, steam heat exchangers, ammonia nitrogen wastewater heat exchangers, ammonia nitrogen wastewater inlet pipes, ammonia nitrogen wastewater outlet pipes, copper-containing wastewater inlet pipes, copper-containing wastewater outlet pipes, washing water systems, and condensate systems; The steam pipe is connected to the steam shut-off valve, pressure reducing valve, pressure gauge, electric regulating valve, and steam heat exchanger. The steam heat exchanger is connected to the steam pipe, the condensate system, the ammonia nitrogen wastewater heat exchanger, and the copper-containing waste liquid discharge pipe. The ammonia nitrogen wastewater heat exchanger is connected to the steam heat exchanger, the ammonia nitrogen wastewater inlet pipe, the ammonia nitrogen wastewater outlet pipe, and the copper-containing waste liquid inlet pipe. The ammonia nitrogen wastewater inlet pipe is connected to the ammonia nitrogen wastewater heat exchanger; The ammonia nitrogen wastewater discharge pipe is connected to the ammonia nitrogen wastewater heat exchanger; The copper-containing waste liquid feed pipe is connected to the ammonia nitrogen wastewater heat exchanger. The copper-containing waste liquid discharge pipe is connected to the steam heat exchanger, and a temperature sensor is installed on the copper-containing waste liquid discharge pipe. The washing system is connected to the ammonia nitrogen wastewater heat exchanger, the steam heat exchanger, and the product rinsing pipe; The condensate system is connected to the steam heat exchanger and the condensate tank, and the condensate system includes a steam trap and a bypass.

2. The high-efficiency and energy-saving heating system for the production of basic copper chloride according to claim 1, characterized in that: It also includes valve assemblies and material pumps.

3. The high-efficiency and energy-saving heating system for the production of basic copper chloride according to claim 1, characterized in that: The ammonia nitrogen wastewater heat exchanger is a plate and frame heat exchanger, and the main heat exchange plate is TAI1.

4. The high-efficiency and energy-saving heating system for the production of basic copper chloride according to claim 1, characterized in that: The steam condensate generated by the steam heat exchanger can be used for backwashing the heat exchanger and for washing the products.

5. The high-efficiency and energy-saving heating system for the production of basic copper chloride according to claim 1, characterized in that: The final temperature of the copper-containing waste liquid can be automatically controlled through the coordinated action of the temperature sensor of the steam heat exchanger and the electric regulating valve.

6. The high-efficiency and energy-saving heating system for the production of basic copper chloride according to claim 1, characterized in that... All heat exchangers are equipped with bypass and flushing bypass.

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