Alkali liquor constant temperature control device

Abstract

The utility model discloses a constant-temperature control device for alkali liquor. The constant-temperature control device comprises a heat supply module and a working module, the heat supply module comprises a heat source, and an output end pipeline of the heat source is connected with a gas inlet of the heat exchange unit. A liquid supply outlet pipeline of the heat exchange unit is connected with an input heat inlet of the alkali liquor storage device, and the temperature of liquid entering the alkali liquor storage device is controlled by a temperature control valve; an input heat outlet pipeline of the alkali liquor storage device is connected with a water inlet of the insulation can; a water outlet pipeline of the insulation can is connected with a liquid inlet of the heat exchange unit; alkali liquor in the alkali liquor storage device flows to the inlet of the alkali liquor tank in the working module through the output liquor outlet, and then flows to the output liquor inlet of the alkali liquor storage device from the outlet of the alkali liquor tank. The utility model has the beneficial effects that the heat supply module is used for heating the alkali liquor, so that the temperature of the alkali liquor supplied to the working module is constant, the equipment can run at full load within a short time after being started, the starting time is greatly shortened, and the running efficiency of the equipment is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of constant temperature control, in particular to a constant temperature control device for alkali solution. Background Art

[0002] Lye, a highly corrosive alkaline chemical, is widely used in industries such as coking and metalworking. It not only dissolves viscous substances like fat but also exhibits high chemical reactivity. In practical applications, temperature control of lye is crucial to ensuring its performance and safety. Because lye heating times vary depending on off-peak and off-peak seasons or unstable off-grid power supply, the lye must be heated to a certain temperature during startup to ensure normal operation. This startup time is particularly prolonged in extreme winter temperatures, making it essential to maintain a stable lye temperature to improve operational efficiency and reduce costs.

[0003] In the prior art, the temperature control of alkali solution is usually carried out by heating the alkali solution in the alkali tank through a heating rod, as disclosed in the patent CN207537532U, "Alkali Tank Alkali Solution Constant Temperature System", and detecting the temperature of the alkali solution in the alkali tank by a temperature control device to ensure that the temperature of the alkali solution in the alkali tank is constant. However, this method of heating the alkali tank easily causes the alkali embrittlement of the alkali tank, resulting in failure. In addition, the prior art including the above patents all transports the alkali solution in the alkali tank to the working alkali tank. Since heat will inevitably be lost during the transportation process, the temperature of the alkali solution in the alkali tank needs to be heated to a temperature higher than the required temperature. However, an excessively high alkali solution temperature will reduce the life of the alkali tank and the pipeline, so the prior art cannot achieve a supply and demand balance of the alkali solution temperature.

[0004] Therefore, designing a constant temperature control device for alkali solution is an important technical problem to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to solve the above problems existing in the prior art and to provide a constant temperature control device for alkali solution.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] The alkali liquid constant temperature control device includes a heating module and a working module; the heating module includes a heat source, and the output end pipe of the heat source is connected to the gas inlet of the heat exchange unit; the liquid supply outlet pipe of the heat exchange unit is connected to the input heat inlet of the alkali liquid storage, and the temperature of the liquid entering the alkali liquid storage is controlled by a temperature control valve; the input heat outlet pipe of the alkali liquid storage is connected to the water inlet of the insulation box, and the water outlet pipe of the insulation box is connected to the liquid inlet of the heat exchange unit; the alkali liquid in the alkali liquid storage flows to the inlet of the alkali liquid tank in the working module via the output drain port, and then flows from the outlet of the alkali liquid tank to the output liquid inlet of the alkali liquid storage.

[0008] Preferably, a cold water pipe is provided between the heat exchange unit and the alkali solution storage, and a switch valve is provided on the cold water pipe.

[0009] Preferably, the temperature control valve includes a temperature regulating part and a valve control part that are sealed and connected; the temperature regulating part is located above the valve control part, and includes an upper shell, a lower shell, a temperature regulating part and a temperature sensing rod; the upper shell is threadedly connected to the lower shell; the temperature regulating part is located in the space enclosed by the upper shell and the lower shell, the top end of the temperature sensing rod is inserted into the temperature regulating part, and the bottom end thereof is in contact with the valve stem of the valve control part.

[0010] Preferably, the temperature sensing rod consists of an upper rod, a lower rod and an upper spring; the upper spring is located between the upper rod and the lower rod, and the temperature regulating component adjusts the deformation of the upper spring to change the position of the valve stem and control the flow in the pipeline.

[0011] Preferably, the valve control part includes a valve housing arranged on the pipeline, a lower spring arranged in the valve housing, and the valve stem passing through the valve housing and the lower spring; sealing gaskets are provided at the upper and lower ends of the valve housing, and the bottom end of the valve stem is located in the pipeline; the top end of the lower spring abuts against the baffle, and the baffle is clamped on the valve stem.

[0012] Preferably, the heat source is steam, and there are two output pipes, and the two output pipes are respectively provided with a manual control valve and an automatic control valve.

[0013] Preferably, the heat exchange unit is a plate heat exchanger or a heat pipe heat exchanger, which is further provided with a gas outlet, and the gas outlet is connected to a pipeline for discharging heat in the heat exchange unit.

[0014] Preferably, a liquid control valve is provided on the pipeline connecting the heat exchange unit and the insulation box.

[0015] Preferably, the working module includes the alkali solution tank and the alkali solution circulation pump, the alkali solution circulation pump is arranged on the pipeline connected to the outlet, and control valves are provided at both ends of the alkali solution circulation pump.

[0016] The advantages of the technical solution of this utility model are mainly reflected in:

[0017] The alkali solution is heated to between 60°C and 70°C by the heating module, ensuring that the temperature of the alkali solution provided to the working module is constant at around 60°C, so that the equipment can run at full load in a short time after startup, greatly shortening the startup time. Research and testing have shown that the technical solution of this utility model can shorten the full load ramp-up time after startup from 60 minutes to within 30 seconds, making full use of off-peak electricity or unstable wind and solar power sources, greatly improving the operating efficiency of the equipment;

[0018] The temperature of the liquid delivered to the alkali liquid storage is controlled by a temperature control valve. The heat output by the heat exchange unit is used to heat the alkali liquid storage and the alkali liquid inside it by the heat transfer principle, avoiding excessive direct heating of the alkali liquid that may cause alkali brittleness in the alkali liquid storage. The alkali liquid is effectively heated within a controllable temperature range, ensuring the safety of the alkali liquid storage and extending its practical life.

[0019] The liquid in the heating module and the alkali solution in the working module are circulated in their respective modules, thereby improving energy utilization and reducing waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 : A structural diagram of a preferred embodiment of the utility model;

[0021] Figure 2 : A structural diagram of a temperature control valve according to a preferred embodiment of the present invention;

[0022] Figure 3 : The structural diagram of the alkali solution storage device of the preferred embodiment of the present utility model. DETAILED DESCRIPTION

[0023] The objectives, advantages, and features of the present invention are illustrated and explained through the following non-limiting description of preferred embodiments. These embodiments are merely typical examples of the application of the technical solutions of the present invention. Any technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

[0024] In the description of the scheme, it should be noted that the terms "center," "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inside," and "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are intended only for ease of description and simplification of the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of the scheme, with the operator as a reference, the direction closer to the operator is referred to as the proximal end, and the direction away from the operator is referred to as the distal end.

[0025] This utility model discloses a constant temperature control device for alkali solution, comprising a heating module 1 and a working module 2. The heating module 1 heats the alkali solution to a temperature between 60°C and 70°C, ensuring that the alkali solution provided to the working module 2 is kept constant at approximately 60°C. This allows the device to operate at full load within a short period of time after startup, significantly shortening the startup time. Research and testing have shown that the technical solution of this utility model can shorten the full-load ramp-up time after startup from 60 minutes to within 30 seconds, fully utilizing off-peak electricity or unstable wind and solar power sources, and significantly improving the operating efficiency of the device.

[0026] Specifically, the heating module 1 includes a heat source 11. In the present invention, steam is preferably used as the heat source 11 because steam has high heat transfer efficiency and can achieve rapid heating.

[0027] The heat source 11's output pipe is connected to the gas inlet 121 of the heat exchange unit 12. Furthermore, the heat source 11 has two output pipes, which are arranged in parallel and are each provided with a manual control valve 111 and an automatic control valve 112. Normally, the automatic control valve 112 is open to deliver heat to the heat exchange unit 12. The manual control valve 111 serves as a backup valve, enabling it to operate in the event of a power failure or malfunction of the automatic control valve 112, ensuring normal operation.

[0028] Part of the heat provided by the heat source 11 is transported via a pipeline to the heat exchange unit 12, where it liquefies and forms a liquid. The heat exchange unit 12 then heats the liquid, allowing it to quickly reach the desired temperature, improving heating efficiency. Furthermore, the heat exchange unit 12 is a known plate heat exchanger or heat pipe heat exchanger. The heated liquid flows out of the liquid supply outlet 122 of the heat exchange unit 12. This outlet 122 is piped to the heat input inlet 131 of the alkali liquid reservoir 13. The temperature of the liquid entering the alkali liquid reservoir 13 is controlled by a thermostatic valve 3. Specifically, the liquid can only flow through the thermostatic valve 3 into the alkali liquid reservoir 13 when the temperature reaches a specified temperature, preferably 65°C ± 5°C. The thermostatic valve controls the temperature of the liquid delivered to the alkali liquid reservoir. Using the principle of heat transfer, the heat output from the heat exchange unit heats the alkali liquid reservoir and the alkali liquid within it. This prevents excessive direct heating of the alkali liquid, which could cause alkali brittleness in the alkali liquid reservoir, and effectively heats the alkali liquid within a controllable temperature range, ensuring the safety of the alkali liquid reservoir and extending its service life.

[0029] Furthermore, the heat exchange unit 12 is further provided with a gas outlet 124 , which is connected to a pipeline for discharging excess heat in the heat exchange unit 12 .

[0030] like Figure 2 As shown, the temperature-controlled valve 3 comprises a sealed thermostat 31 and a valve control unit 32. The thermostat 31 is located above the valve control unit 32 and includes an upper housing 311, a lower housing 312, a thermostat 313, and a temperature-sensing rod 314. The upper housing 311 is threadedly connected to the lower housing 312. Counterclockwise rotation increases the distance between the upper and lower housings 311 and 312, thereby increasing the valve opening of the valve control unit 32. Conversely, the distance decreases, thereby decreasing the valve opening of the valve control unit 32.

[0031] The outer periphery of the upper housing 311 is provided with a series of strip-shaped cutouts to facilitate temperature sensing by the thermostat 313. A digital temperature scale is provided on the outer surface of the upper housing 311, and a pointer is provided on the outer surface of the lower housing. When the pointer rotates to a specified temperature, it determines the distance between the upper housing 311 and the lower housing 312, limiting the position of the temperature-sensing rod 314, thereby determining the valve opening. The thermostat 313 automatically stabilizes the valve at the set temperature.

[0032] The thermostat 313 is a temperature-sensing element located within the space enclosed by the upper shell 311 and the lower shell 312. Its interior consists of a temperature-sensitive solid-liquid mixture. When the temperature rises, the filler expands, causing the top surface of the inner hole to move downward; conversely, when the temperature drops, the top surface of the inner hole moves upward. The top end of the thermostat rod 314 is inserted into the thermostat 313, and its bottom end contacts the valve stem 321 of the valve control unit 32. Specifically, the thermostat rod 314 consists of an upper rod 3141, a lower rod 3142, and an upper spring 3143. The upper spring 3143 is located between the upper rod 3141 and the lower rod 3142, and the thermostat 313 adjusts the deformation of the upper spring 3143 to change the position of the valve stem 321 and control the flow rate in the pipeline. The thermostat rod 314 can be used to transmit distance changes of the thermostat 313 and protect the thermostat 313 from damage. The design force value of the upper spring 3143 is such that significant deformation occurs when the force is greater than 120 N. Therefore, the temperature sensing rod 314 can protect the temperature regulating element 313 from being subjected to a force less than 120 N, and the excess force is borne by the temperature sensing rod 314 itself.

[0033] like Figure 2 As shown, the valve control unit 32 includes a valve housing 320 disposed on the pipeline, a lower spring 322 disposed within the valve housing 320, and a valve stem 321 that extends through the valve housing 320 and the lower spring 322. Sealing gaskets are provided at both the upper and lower ends of the valve housing 320, and the bottom end of the valve stem 321 is located within the pipeline. The top end of the lower spring 322 abuts against a baffle 3221, which is also engaged with the valve stem 321. When the valve stem 321 moves downward under the action of the temperature-sensing rod 314, the lower spring 322 is compressed within the valve housing 320 due to the securing effect of the baffle 3221, generating a rebound force. The valve stem 321 reduces the valve opening, thereby lowering the temperature of the liquid flowing through the valve housing 320. For example, if the current temperature of the liquid flowing through the valve housing 320 is 60°C, and the temperature is set to 65°C via the upper housing 311, the valve opening will increase, eventually reaching 65°C. If the temperature fluctuates and reaches 64°C, the thermostat 313 will contract, and the temperature-sensing rod 314 will move upward, causing the valve opening to increase, increasing the flow of hot water and raising the temperature. The reverse is also true. Through the continuous temperature sensing and changes of the thermostat 313, the temperature is ultimately stabilized at the set point and continuously adjusted.

[0034] like Figure 1As shown, there is at least one alkali liquid reservoir 13, and its number can be adjusted according to needs and is not limited here. If there are multiple alkali liquid reservoirs 13, they can be connected in series or arranged in parallel at the output end of the heat exchange unit 12. A cold water pipeline is also provided between the heat exchange unit 12 and the alkali liquid reservoir 13, and an on-off valve 15 is installed on this cold water pipeline. If the temperature control valve 3 fails, the on-off valve 15 can be activated to adjust the temperature of the liquid supplied to the alkali liquid reservoir 13.

[0035] The heat input outlet 132 of the alkali liquid storage device 13 is connected to the water inlet 141 of the heat preservation box 14 through a pipe, and the water outlet 142 of the heat preservation box 14 is connected to the liquid inlet 123 of the heat exchange unit 12 through a pipe. The liquid after heat exchange with the alkali liquid storage device 13 flows into the heat preservation box 14 through a pipe, and is transported to the heat exchange unit 12 through a pipe during use to increase the liquid capacity in the heat exchange unit 12 and ensure that the capacity can meet the requirements of heat exchange with the alkali liquid storage device. Furthermore, a liquid control valve 125 is provided on the pipe connecting the heat exchange unit 12 and the heat preservation box 14. The liquid control valve 125 includes a valve body and a water pump. Since the valve body and the water pump are both known structures, they are not described here.

[0036] The working module 2 includes an alkali solution tank 21 and an alkali solution circulation pump 22 connected by pipelines. The alkali solution in the alkali solution reservoir 13 flows through the output drain port 133 to the inlet 211 of the alkali solution tank 21 in the working module 2, and then flows from the outlet 212 of the alkali solution tank 21 to the output inlet 134 of the alkali solution reservoir 13. The alkali solution circulation pump 22 is installed on the pipeline connected to the outlet 212, and control valves 221 are installed at both ends of the alkali solution circulation pump 22. The liquid in the heating module and the alkali solution in the working module are recycled within their respective modules, improving energy utilization and reducing waste.

[0037] like Figure 3 As shown, the alkali liquid reservoir 13 includes an outer layer 1301 for storing the liquid output from the heat exchange unit 12 and an inner layer 1302 for storing the alkali liquid. The heat input inlet 131 and heat input outlet 132 are located outside the outer layer 1301 and communicate with the outer layer 1301; the output liquid outlet 133 and the output liquid inlet 134 are located outside the inner layer 1302 and communicate with the inner layer 1302.

[0038] There are many implementation methods for the present utility model, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the present utility model.

Claims

1. Alkali solution constant temperature control device, characterized by: The invention comprises a heating module (1) and a working module (2); the heating module (1) comprises a heat source (11); the output end pipeline of the heat source (11) is connected to the gas inlet (121) of the heat exchange unit (12); the liquid supply outlet (122) of the heat exchange unit (12) is connected to the input heat inlet (131) of the alkali liquid storage (13) by a pipeline, and the temperature of the liquid entering the alkali liquid storage (13) is controlled by a temperature control valve (3); the input heat outlet (131) of the alkali liquid storage (13) is connected to the input heat inlet (131) of the alkali liquid storage (13). 2) a pipe is connected to the water inlet (141) of the heat preservation box (14), and a pipe is connected to the water outlet (142) of the heat preservation box (14) to the liquid inlet (123) of the heat exchange unit (12); the alkali liquid in the alkali liquid storage (13) flows to the inlet (211) of the alkali liquid tank (21) in the working module (2) through the output drain port (133), and then flows from the outlet (212) of the alkali liquid tank (21) to the output liquid inlet (134) of the alkali liquid storage (13).

2. The alkali solution constant temperature control device according to claim 1, characterized in that: A cold water pipe is further provided between the heat exchange unit (12) and the alkali solution storage (13), and a switch valve (15) is provided on the cold water pipe.

3. The alkali solution constant temperature control device according to claim 1, characterized in that: The temperature control valve (3) comprises a temperature regulating part (31) and a valve control part (32) which are sealed and connected; the temperature regulating part (31) is located above the valve control part (32) and comprises an upper shell (311), a lower shell (312), a temperature regulating element (313) and a temperature sensing rod (314); the upper shell (311) is threadedly connected to the lower shell (312); the temperature regulating element (313) is located in a space enclosed by the upper shell (311) and the lower shell (312); the top end of the temperature sensing rod (314) is inserted into the temperature regulating element (313), and the bottom end thereof is in contact with the valve stem (321) of the valve control part (32).

4. The alkali solution constant temperature control device according to claim 3, characterized in that: The temperature sensing rod (314) is composed of an upper rod (3141), a lower rod (3142) and an upper spring (3143); the upper spring (3143) is located between the upper rod (3141) and the lower rod (3142), and the temperature regulating element (313) adjusts the deformation of the upper spring (3143) to change the position of the valve stem (321) and control the flow rate in the pipeline.

5. The alkali solution constant temperature control device according to claim 3, characterized in that: The valve control portion (32) comprises a valve housing (320) arranged on the pipeline, a lower spring (322) arranged in the valve housing (320), and the valve stem (321) passing through the valve housing (320) and the lower spring (322); sealing gaskets are provided at the upper and lower ends of the valve housing (320), and the bottom end of the valve stem (321) is located in the pipeline; the top end of the lower spring (322) abuts against a baffle (3221), and the baffle (3221) is clamped on the valve stem (321).

6. The alkali solution constant temperature control device according to claim 1, characterized in that: The heat source (11) is steam, and has two output pipes, and the two output pipes are respectively provided with a manual control valve (111) and an automatic control valve (112).

7. The alkali solution constant temperature control device according to claim 2, characterized in that: The heat exchange unit (12) is a plate heat exchanger or a heat pipe heat exchanger, and is further provided with a gas outlet (124). The gas outlet (124) is connected to a pipeline to discharge heat in the heat exchange unit (12).

8. The alkali solution constant temperature control device according to claim 1, characterized in that: A liquid control valve (125) is provided on the pipeline connecting the heat exchange unit (12) and the heat preservation box (14).

9. The alkali solution constant temperature control device according to claim 1, characterized in that: The working module (2) comprises the alkali solution tank (21) and an alkali solution circulation pump (22); the alkali solution circulation pump (22) is arranged on a pipeline connected to the outlet (212), and control valves (221) are provided at both ends of the alkali solution circulation pump (22).

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