An alkali furnace steam condensate water pH value accurate measuring device

Abstract

The utility model discloses a kind of soda furnace steam condensate water pH value accurate measuring device, it is related to steam condensate water pH value measurement technical field, the utility model includes the condensate tank for collecting steam condensate water, the main pipeline for conveying condensate water being arranged at one side of condensate tank, pH metering pool and the pH measuring meter inserted into pH metering pool, cooler is arranged between pH metering pool and condensate tank, the cooler is communicated to pH metering pool by sample effluent pipe, the cooler is communicated with the outer peripheral wall of main pipeline by sample inflow pipe;Using cooler, steam condensate water can be cooled and then enter into pH metering pool, prevent liquid temperature in pH metering pool too high, damage pH measuring meter in pH metering pool, cause damage, greatly reduce the temperature resistance requirement to pH sensor, ensure the accuracy of pH value measurement.

Description

Technical Field

[0001] This utility model relates to a pH value measuring device, and more specifically, to a device for accurately measuring the pH value of steam condensate from an alkali furnace. Background Technology

[0002] The condensate from the alkali furnace mainly comes from the steam condensate from the evaporation section and the condensate from the drying cylinder of the paper machine. The quality of this condensate fluctuates, directly affecting the safe operation and efficiency of the alkali furnace. Abnormal water quality can lead to corrosion, scaling, stress, and other mechanisms that endanger the furnace tubes. In existing technology, the steam condensate pH probe is directly inserted into the condensate inlet pipe. The steam condensate temperature reaches approximately 120℃, while conventional pH meters only withstand temperatures up to 120℃. Prolonged exposure to high temperatures can easily lead to large measurement errors or probe damage, resulting in a lack of reliable reference data during operation, posing safety hazards and impacting equipment efficiency.

[0003] Therefore, a new solution is needed to address this problem. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a device for accurately measuring the pH value of steam condensate from an alkali furnace.

[0005] The technical solution of this utility model is:

[0006] A device for accurately measuring the pH value of steam condensate from an alkali furnace includes a condensate tank for collecting steam condensate, a main pipeline installed on one side of the condensate tank for conveying condensate, a pH metering cell, and a pH meter inserted into the pH metering cell. A cooler is provided between the pH metering cell and the condensate tank. The cooler is connected to the pH metering cell through a sample outlet pipe and is connected to the outer peripheral wall of the main pipeline through a sample inlet pipe.

[0007] The present invention is further configured such that the cooler is provided with a coolant inlet pipe and a coolant outlet pipe at both ends, the other end of the coolant inlet pipe is connected to a cooling tower, the coolant outlet pipe is connected to a coolant storage tank, the outlet of the coolant storage tank is connected to the coolant inlet pipe via a water pump, the coolant inlet pipe is provided with a regulating valve, and the sample outlet pipe is provided with a first temperature sensor at the end near the cooler, the first temperature sensor being electrically connected to the regulating valve.

[0008] The present invention is further configured such that a transfer box is provided between the pH metering cell and the cooler, one side of the transfer box is connected to the sample outlet pipe, the other side of the transfer box is provided with an overflow port connected to the bottom of the pH metering cell, the other side of the transfer box is provided with a drain port connected to the condensate tank, and the top of the pH metering cell is connected to the condensate tank through a first circulation pipe.

[0009] The present invention is further configured such that a second temperature sensor is provided at the bottom of the transfer box, an electric three-way valve is connected to the drain outlet, one end of the electric three-way valve is connected to the condensate tank through a second circulation pipe, the other end of the electric three-way valve is connected to the sample inlet pipe through a sample circulation pipe, and a second temperature sensor is provided between the electric three-way valve and the sample outlet pipe between the cooler, and the second temperature sensor is electrically connected to the electric three-way valve.

[0010] The present invention is further configured such that the cooler is provided with a heat exchange coil, one end of the heat exchange coil is connected to the sample outlet pipe, the other end of the heat exchange coil is connected to the sample inlet pipe, and an arc-shaped baffle assembly is provided on the inner peripheral wall of the cooler.

[0011] The beneficial technical effects of this utility model are:

[0012] By incorporating a cooler and the combined use of a first temperature sensor and a second temperature sensor, the high-temperature steam condensate, after passing through the cooler, is sufficiently cooled before entering the pH metering tank, as detected by the first and second temperature sensors. This prevents the liquid temperature in the pH metering tank from becoming too high and damaging the pH meter, significantly reducing the temperature resistance requirements of the pH sensor and ensuring the accuracy of pH measurement. Attached Figure Description

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

[0014] In the diagram, 1. Condensate tank; 11. Main pipeline; 2. Cooler; 3. pH metering tank; 4. pH meter; 5. Coolant storage tank; 6. Regulating valve; 7. Electric three-way valve; 8. Transfer box. Detailed Implementation

[0015] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0016] A device for accurately measuring the pH value of steam condensate from an alkali furnace, such as... Figure 1As shown, the device includes a condensate tank 1 for collecting steam condensate, a main pipe 11 for conveying steam condensate located on one side of the condensate tank 1, a pH metering cell 3, and a pH meter 4 inserted into the pH metering cell 3. A cooler 2 is installed between the pH metering cell 3 and the condensate tank 1. The cooler 2 is connected to the pH metering cell 3 through a sample outlet pipe and is connected to the outer peripheral wall of the main pipe 11 through a sample inlet pipe. By using the cooler 2, the steam condensate can be cooled before entering the pH metering cell 3, preventing the liquid temperature in the pH metering cell 3 from being too high and damaging the pH meter 4 inside the pH metering cell 3. This greatly reduces the temperature resistance requirements of the pH sensor and ensures the accuracy of pH measurement.

[0017] Cooler 2 has a coolant inlet pipe and a coolant outlet pipe at both ends. The other end of the coolant inlet pipe is connected to a cooling tower, and the coolant outlet pipe is connected to a coolant storage tank 5. The outlet of the coolant storage tank 5 is connected to the coolant inlet pipe via a water pump, making the coolant a circulating fluid. A regulating valve 6 is installed on the coolant inlet pipe, and a first temperature sensor is installed at the end of the sample outlet pipe near cooler 2. The first temperature sensor is electrically connected to the regulating valve 6. By setting the first temperature sensor, the temperature of the steam condensate after passing through cooler 2 can be detected. The first temperature sensor is electrically connected to the regulating valve 6. When the first temperature sensor detects a temperature greater than 61°C... At ℃, the control valve 6 increases the coolant flow rate; when the temperature is below 59℃, the flow rate decreases to ensure that the outlet water temperature is stable at 60℃±1℃, thus accurately controlling the cooling temperature of the steam condensate. The cooler 2 is equipped with a heat exchange coil, one end of which is connected to the sample outlet pipe and the other end of which is connected to the sample inlet pipe. The inner circumferential wall of the cooler 2 is equipped with an arc-shaped baffle assembly. By setting the heat exchange coil, the movement trajectory of the steam condensate in the cooler 2 is extended, increasing the cooling effect of the cooler 2. The baffle assembly extends the flow channel length of the shell-side medium, increases the inter-tube flow velocity, and increases the degree of turbulence, thus also improving the heat transfer effect of the cooler 2.

[0018] A transfer box 8 is provided between the pH metering cell 3 and the cooler 2. One side of the transfer box 8 is connected to the sample outlet pipe, and an overflow port is provided on the upper side of the other side of the transfer box 8, which is connected to the bottom of the pH metering cell 3. A drain port is provided on the lower side of the other side of the transfer box 8, which is connected to the condensate tank 1. The top of the pH metering cell 3 is connected to the condensate tank 1 through the first circulation pipe. By setting up the transfer box 8, the cooled steam condensate is collected, and an overflow port is provided. When the water level in the transfer box 8 rises and reaches the overflow port, since the overflow port is connected to the bottom of the pH metering cell 3 through a switch valve, the cooled steam condensate slowly flows into the pH metering cell 3 through the overflow, causing the water level in the pH metering cell 3 to rise slowly until it touches the probe of the pH meter 4. The overflow design realizes the "self-stabilization and control" of the water flow, avoiding the water flow being too large and washing away the pH meter 4, and the turbulent impact of the main pipe 11 of the metering cell. The pipeline structure is simplified, reducing the risk of crystal adhesion and ensuring the service life of the overall structure.

[0019] A second temperature sensor is installed at the bottom of the transfer box 8, and an electric three-way valve 7 is connected to the drain outlet. The electric three-way valve 7 is an electric three-way regulating valve 6. One end of the electric three-way valve 7 is connected to the condensate tank 1 through the second circulation pipe, and the other end of the electric three-way valve 7 is connected to the sample inlet pipe through the sample circulation pipe. By setting the drain outlet, the steam condensate collected in the transfer box 8 can be returned to the condensate tank 1, forming a closed circulation loop. This avoids the volatilization of alkaline media or the introduction of impurities due to contact between the condensate and the outside environment, ensuring that the measured value truly reflects the in-situ water quality and reducing water waste. Moreover, the electric three-way valve 7 is an electric three-way regulating valve 6, which can adjust the flow rate and effectively control the speed at which the water level rises in the transfer box 8 and the speed at which the steam condensate returns to the condensate tank 1. The electric three-way valve 7 is connected to the cooler 2. A second temperature sensor is installed between the sample outlet pipes. The second temperature sensor is electrically connected to the electric three-way valve 7. The second temperature sensor can also detect the temperature of the liquid in the transfer box 8 in real time. When the first temperature sensor detects a temperature greater than 61°C, it can control the regulating valve 6 to increase the coolant flow rate. However, condensate with a temperature greater than 61°C will still enter the transfer box 8. When the second temperature sensor detects a temperature greater than 61°C, it controls the electric three-way valve 7 to connect with the sample circulation pipe, so that the uncooled steam condensate flows back to the sample inlet pipe and re-enters the cooler 2 for cooling until the temperature is less than 61°C. When the temperature is less than 61°C, it controls the electric three-way valve 7 to connect with the second circulation pipe, so that the steam condensate in the transfer box 8 can be slowly discharged and flow back to the condensate tank 1, forming a closed circulation loop.

[0020] All of the above steam condensate pumps can be driven by water pumps, and the connection or closure of each pipeline can be ensured by adding switch valves.

[0021] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A device for accurately measuring the pH value of steam condensate from an alkali furnace, characterized in that: The device includes a condensate tank (1) for collecting steam condensate, a main pipe (11) for conveying condensate located on one side of the condensate tank (1), a pH metering cell (3), and a pH meter (4) inserted into the pH metering cell (3). A cooler (2) is provided between the pH metering cell (3) and the condensate tank (1). The cooler (2) is connected to the pH metering cell (3) through a sample outlet pipe. The cooler (2) is connected to the outer wall of the main pipe (11) through a sample inlet pipe.

2. The device for accurately measuring the pH value of steam condensate from an alkali furnace according to claim 1, characterized in that: The cooler (2) is provided with a coolant inlet pipe and a coolant outlet pipe at both ends. The other end of the coolant inlet pipe is connected to the cooling tower. The coolant outlet pipe is connected to the coolant storage tank (5). The outlet of the coolant storage tank (5) is connected to the coolant inlet pipe through a water pump. The coolant inlet pipe is provided with a regulating valve (6). The sample outlet pipe is provided with a first temperature sensor at the end near the cooler (2). The first temperature sensor is electrically connected to the regulating valve (6).

3. The device for accurately measuring the pH value of steam condensate from an alkali furnace according to claim 2, characterized in that: A transfer box (8) is provided between the pH metering pool (3) and the cooler (2). One side of the transfer box (8) is connected to the sample outlet pipe. An overflow port is provided on the upper side of the other side of the transfer box (8) and connected to the bottom of the pH metering pool (3). A drain port is provided on the lower side of the other side of the transfer box (8) and connected to the condensate tank (1). The top of the pH metering pool (3) is connected to the condensate tank (1) through the first circulation pipe.

4. The device for accurately measuring the pH value of steam condensate from an alkali furnace according to claim 3, characterized in that: The transfer box (8) is equipped with a second temperature sensor at the bottom. An electric three-way valve (7) is connected to the drain outlet. One end of the electric three-way valve (7) is connected to the condensate tank (1) through a second circulation pipe. The other end of the electric three-way valve (7) is connected to the sample inlet pipe through a sample circulation pipe. A second temperature sensor is provided between the electric three-way valve (7) and the sample outlet pipe between the cooler (2). The second temperature sensor is electrically connected to the electric three-way valve (7).

5. The device for accurately measuring the pH value of steam condensate from an alkali furnace according to claim 2, characterized in that: The cooler (2) is equipped with a heat exchange coil. One end of the heat exchange coil is connected to the sample outlet pipe, and the other end of the heat exchange coil is connected to the sample inlet pipe. The inner peripheral wall of the cooler (2) is equipped with an arc-shaped baffle assembly.

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